Shibaura ST318 Workshop Manual Download Page 217

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216

2) Operat

(

oil flow)

(1) Neutral position

The oil is fed under pressure by the oil pump through the ports P

and P

to the remote valve.

The oil from the port P

passes through the outer surface of the spool and is fed to the main control valve. It

is blocked there are fed under pressure from the port P

side to the main control valve through the passage

as illustrated below.

The oil from the remote cylinder is cut out by the spool so that the implement is held.

Remote Cylinder

5. System Relief Valve

Implement 6.

Oil

Pump

Remote Valve Spool

7. Suction Filter

Main Control Valve

8. Spacer

(For Lifting/Lowering Implement)

T691

Summary of Contents for ST318

Page 1: ......

Page 2: ...ccording to efficient and economical specifications requiring no after care This manual describes structure functions maintenance and service procedures for the ST tractors to obtain their functions f...

Page 3: ...mbly Inspection Reassembly of Front Axle 99 3 Wheel Alignment 107 4 Front Wheel 107 3 2 Clutch 108 1 Single Clutch 108 2 Troubleshooting of Clutch 113 3 3 Transmission 114 1 9 3 Manual Transmission 11...

Page 4: ...3 Chapter 1 GENERAL...

Page 5: ...Model A B C D E F G ST 318 9 3 2728 2262 245 1042 1405 822 851 ST 321 9 3 2728 2287 270 1138 1405 845 897 ST 318 HST 2728 2240 223 1188 1405 930 891 ST 321 HST 2728 2240 223 1188 1405 930 891 ST 324 H...

Page 6: ...ange method Hydrostatic Transmission Selective Sliding Shifter Running Speed Changes 2 Steps Forward and 2 Steps Reverse 9 Speeds Forward and 3 Speeds Reverse Differential 4 Pinion Spiral Bevel Drive...

Page 7: ...9 3 9th 14 96 15 95 Reverse Km h L R R1 2 00 2 13 0 3 61 M R2 4 77 5 08 H R3 12 47 13 29 0 9 29 No of PTO Speeds 1 1 1 PTO Speed rpm at engine speed 2600 rpm Rear PTO 588 588 561 Mid PTO 2139 2139 204...

Page 8: ...ine transmission and hydraulic components have been specially manufactured with a high degree of accuracy Care should be exercised to maintain them in a clean state Do not disassemble unnecessarily 2...

Page 9: ...65 7 83 3 6 7 8 5 74 5 94 1 7 6 9 6 10T 11T 92 0 116 9 4 11 8 99 0 126 10 1 12 9 M14 4T 4 8 2 0 62 8 80 4 6 4 8 2 1 5 69 6 87 2 7 1 8 9 7T 8T 8 8 104 132 10 6 13 4 117 148 11 9 15 1 10T 11T 139 175 1...

Page 10: ...54 9 7T 8T 8 8 48 5 61 5 65 7 83 3 55 0 69 4 74 5 94 1 10T 11T 68 0 85 3 92 0 116 73 0 93 3 99 0 126 M14 4T 4 8 2 0 46 3 59 3 62 8 80 4 1 5 51 4 64 3 69 6 87 2 7T 8T 8 8 76 7 96 9 104 132 86 1 109 117...

Page 11: ...anual Transmission Model 2 Hydrostatic Transmission Model Flow chart Front axle Engine Clutch case Transmission Rear axle Hydraulic cylinder case Front axle Engine Clutch case Transmission Front Trans...

Page 12: ...ges from leaking out causing the gauges to give a false indication during operation 2 Bonnet hood Disconnect the negative terminal from the battery Disconnect the connector for head lamps Remove the c...

Page 13: ...e the reserve tank from the tank support Disconnect the drain hoses form the drain cock 7 Dash board shrouding Remove the screws securing the steering column center shrouding disconnect the electrical...

Page 14: ...hood hinge bracket form the firewall Remove the screws and tank from the tractor Remove the tank support 10 Side step Remove the foot throttle linkage return spring remove cotter pin and disconnect th...

Page 15: ...s to the shaft universal joint Remove the universal joint locking bolts from the front axle and transmission end universal joints and if necessary remove the drive shaft 14 Power steering piping Remov...

Page 16: ...ST 17 Battery base front axle support Remove the bolts and battery base form on the front axle support Lift the engine with the hoist and put the safety stand under the clutch housing Heat the front a...

Page 17: ...olts and separate the engine from the clutch housing 21 Clutch housing HST only Remove the HST test port from top of clutch housing Note the HST control rod length before removing for reassembly Untig...

Page 18: ...from the HST unit Remove the HST unit from the extension housing NOTE Do not lose the O ring when removing the unit from the extension housing 23 Damper HST shift link assembly Drive out the roll pin...

Page 19: ...Panel Front 4 Lever Guides 8 FWD Lever 2 Front side cover On FWD models disconnect the FWD shaft from the transmission see ENGINE REMOVAL Unhook the return spring from the hydraulic control valve and...

Page 20: ...sion cover plate 6 Shift cover assembly brake rod Disconnect the shift link 9 3 only from the shift cover assembly Remove the banjo bolt and return pipe from the case cover HST Model only Remove the s...

Page 21: ...hose clamp and remove the banjo bolt and suction tube for HST Remove the banjo bolts and piping for oil cooler and oil filter circuit 8 Mid PTO and rear PTO change lever assembly Remove the split pins...

Page 22: ...t cylinder housing on 9 3 Model 10 Fwd change lever Drive out the roll pin from the front drive change lever Remove the front drive change lever assembly from the rear transmission housing 11 Lift cyl...

Page 23: ...embly Remove the clamp of the differential lock pedal Remove the rear axle retaining bolts and nuts and remove the rear axle assembly NOTE 1 Take care so that units do not lose balance 2 Care is also...

Page 24: ...d sealant is Three Bond No 1305B and apply the thread sealant 2 Installation generally follows the removal procedure in reverse and refer to mentioned below 1 Return spring Apply the grease to the ret...

Page 25: ...ral position by tuenbackle 5 Power steering piping Power steering pipings tightening torque to follows as illustration 6 Front axle support bolt Apply the thread sealant on the bolts thread when insta...

Page 26: ...low throttle position and foot throttle to the free position 4 Turn the key switch to the Start position rotate the starting motor until the oil pressure lamp goes off about 20 30 seconds 5 Turn the k...

Page 27: ...26...

Page 28: ...27 Chapter 2 ENGINE Tractor Model Engine Model ST318 S753 ST321 S773 ST324 S773L...

Page 29: ...28 2 1 Engine Sectional View T100 T101...

Page 30: ...rpm Fuel system Injection pump type Nozzle type Fuel Fuel consumption Bosch type Throttle type Diese fuel oil 200 g PSH 0 46 lb HP Hr Lubricating system Lubricating method Filtering method Lubricatin...

Page 31: ...p solenoid Seal washer 7 Injection pipe 8 Injection pump NOTE 1 Remove the injection pipes and engine stop solenoid before remove the injection pump 2 Raise the injection pump and remove the governor...

Page 32: ...cover 16 Rocker arm assembly NOTE Draw out the roll pin A from the No 1 rocker arm bracket and remove the rocker arm shaft 17 Push rod 18 Cylinder head Head gasket NOTE 1 If necessary remove the intak...

Page 33: ...steering oil pump 23 Crankshaft pulley 24 Timing gear case assembly NOTE Remove the engine stop solenoid and injection pump assembly at first 25 Idle gear Oil pump assembly 26 Cam shaft assembly Tach...

Page 34: ...connecting rod assembly NOTE 1 Before extracting piston remove the carbon deposit from the TDC in the cylinder 2 Place the connecting rod cap and bearing removed in order of the cylinders 33 Crank sha...

Page 35: ...sembly 1 Remove the bolts at both ends of the rocker arm shaft and take out the rocker arm rocker arm bracket spring and shim 2 Extract the spring pin which has been driven into the No 1 cylinder rock...

Page 36: ...rinder or the like Distortion at cylinder head bottom surface mm Standard assembling value Repair value Less than 0 05 More than 0 12 2 Valve guide and valve stem Check the head and stem of each valve...

Page 37: ...e the valve seat is corrected according to the valve guide be sure to check the valve guide for wear condition first before correcting the seat Correct the seat to the standard assembling values of th...

Page 38: ...service limit is exceeded Check the free length and spring force with a spring tester and replace if the service limit is exceeded 5 Inner face of combustion chamber Pull out the cap and insert from t...

Page 39: ...nt Apply the gauge correctly at right angle to the bore wall surface Cylinder honing shall be conducted by boring according to the following specifications Horning specifications 2 step honing accordi...

Page 40: ...90 74 9325 74 9475 O S 0 5 115317800 75 4325 75 4475 O S 1 0 115317810 75 9325 75 9475 S773 S T D 115317630 76 9325 76 9475 O S 0 5 115317640 77 4325 77 4475 S773L S T D 115317990 76 9325 76 9475 O S...

Page 41: ...d piston rings are available Piston kit Model Size Part code No S753 STD 115017140 O S 0 5 115017150 O S 1 0 115017160 S773 STD 115016990 O S 0 5 115016980 S773L STD 115017460 O S 0 5 115017450 Piston...

Page 42: ...eeds the service limit 3 Install the connecting rod to the crankshaft measure the axial play and replace the connecting rod if the service limit is exceeded Torsion and parallelism of connecting rod m...

Page 43: ...pin and replace with a metal of undersize NOTE 1 When the crank shaft pin outside is ground check the oil clearance before installing it 2 Grind the crank pin precisely referring to the paragraph of...

Page 44: ...773 S773L 21 85 21 95 21 55 Reassembly bearing holder center bearing thrust washer 1 Install the bearing holder with identification cutting mark at the center and the bearing holder with thrust washer...

Page 45: ...Bush size Bush code No Crankshaft journal outside dia Finishing dimension S753 S773 STD 198517080 45 964 45 975 U S 0 25 198517084 45 714 45 725 U S 0 50 198517087 45 464 45 475 S773L STD 198517590 4...

Page 46: ...the journal and pin in the AA and BB directions at the position 1 and 2 avoiding the oil holes NOTE Finishing accuracy when grinding the crankshaft to undersize shall be as follows R at pin and journ...

Page 47: ...imit is exceeded 2 Correct insignificant uneven wear or scars on the cam surface using oil stone or the like A Height of intake exhaust valve cams mm Standard assembling value Service limit 26 56 26 6...

Page 48: ...47 13 Oil flow T140...

Page 49: ...crankshaft gear and idle gear aligning the match mark Adjust the side clearance of the rotor and vane to 0 1 0 15 mm See the assembling order 12 T162 15 Oil filter Structure and Functions 1 The cartri...

Page 50: ...nspection Thermostat 1 Replace if the valve is opened even only slightly at normal temperature 2 Immerse the thermostat in water increase the water temperature gradually and check the valve opening te...

Page 51: ...protect the radiator from being crushed under the atmospheric pressure shown by black arrow mark Inspection 1 Check the radiator pipe for water leakage and repair or replace if unsatisfactory 2 Check...

Page 52: ...r is a mechanical all speed governor It is installed in the gear case The fly weight ass y is installed to the cam shaft and its movement is transmitted to the control rack of the injection pump throu...

Page 53: ...pressure 11 27 12 25 MPa 115 125 kg cm2 Nozzle holder 093100 3320 ND KCA46SD332 Adjustment pressure 12 25 12 74 MPa 125 130 kg cm2 Nozzle 093400 1460 ND DN4SDND146 Injection angle 4 Structure and func...

Page 54: ...he body and needle valve to ensure that they slide lightly 2 Invert the body place the shim spring rod piece and nozzle on it in this order cover the nozzle nut and tighten 3 After assembly check for...

Page 55: ...e dust pan also 2 If soot or oil has sticked to the element immerse it in neutral detergent for about 15 minutes and then wash by shaking several times Rinse in clean water sufficiently and dry natura...

Page 56: ...parts excessively Tighten them with specified torque Reassembly 1 Relief valve assembly with O ring Relief valve tightening torque 59 69 N m 6 7 kgf m 2 Crank shaft and bearing holder assembly Cylind...

Page 57: ...Insert the ring facing the connecting rod figure match mark toward the injection pump side using ring pliers NOTE Place the smallest connecting rod figure match mark to the front side so that the figu...

Page 58: ...tachometer shaft Install the cam shaft ass y taking care to the bearing Fix the tachometer shaft and cam shaft ass y with the plate Plate tightening torque 9 13 N m 0 9 1 3 kgf m NOTE Install the timi...

Page 59: ...or and vane side clearance is 0 1 0 15 mm 13 Timing gear case Untighten the lock nut and remove the low idle set bolt Install the start spring between the timing gear case and governor link Inserting...

Page 60: ...t side radiator side Extract the delivery valve and spring and reinstall the delivery valve holder Move the governor lever in the fuel increasing direction and flow the fuel near 25 before compression...

Page 61: ...nstall the delivery valve and spring in the injection pump Delivery holder tightening torque 39 44 N m 4 0 4 5 kgf m Engine Model S773L Piston displacement to crankshaft angle before TDC Displacement...

Page 62: ...147280 111147570 t 1 3 NOTE Lowest for digits of code numbers are stamped on the head gasket Install head gasket with code numbers at top Model S773 Position each of the pistons at top dead center and...

Page 63: ...o 0 2 mm with adjust screw NOTE 1 Adjust the valve clearance while cold 2 Set the No 1 cylinder at the compression TDC adjust the valve clearance of the No 1 intake and exhaust valves and No 2 exhaust...

Page 64: ...nd gasket positively tighten with specified torque using a nozzle holder socket and install the return pipe Model Nozzle and holder tightening torque S753 S773 78 83 N m 8 0 8 5 kgf m S773L 59 68 6 N...

Page 65: ...stall the fan pulley and cooling fan and then V belt Adjust the belt tension with the alternator so that it is deflected 5 10 mm at the middle point between the crankshaft pulley and alternator pulley...

Page 66: ...be taken to the following points when handling the alternator 1 Reverse connection of the battery should be absolutely avoided 2 Each terminal should be connected correctly 3 When electricity is charg...

Page 67: ...a nut 5 at B terminal and remove rear end cover 4 3 Brush Holder Remove 2 screws 6 fastening brush holder 7 to rectifier 8 and remove holder 7 4 IC regulator Remove three screws 9 holding IC regulator...

Page 68: ...n Figure T182 remove rear end cover 16 using STT 8 Rotor As shown in Figure T183 support drive end frame horizontally using 2 blocks and remove the rotor with a press 9 Retainer plate Remove 4 screws...

Page 69: ...on resistance between the core and coil shall be more than 0 1 M when measured with a 500 V megger NOTE When there is no continuity check the lead wire connection since stater coil disconnection is no...

Page 70: ...asurement of resistacne in the right direction Diode characteristics bring forth a great difference in current in the right direction according to the source voltage and therefore measurement is diffe...

Page 71: ...ng 6 MEASUREMENT ON VEHICLE 1 Regulated voltage check IC regulator 1 Connect the voltmeter and ammeter in the manner shown in Figure T194 and turn on the ignition switch Check that the charge lamp is...

Page 72: ...radio noises The cause of the noise should be narrowed down to the battery wiring alternator regulator or vehicle running condition 2 PRELIMINARY CHECK Before starting this check the following should...

Page 73: ...Is it within 14 5 0 6 V NOTE When regulator temperature is higher it shall be between 13 0 V and 15 5V Check alternator output characteristic by using regulator tester It has standard output at engin...

Page 74: ...r emission control computer etc can be destroyed by abnormal pulse voltage and therefore this should be done by removing the battery from the vehicle or disengaging the cable from the battery 5 The al...

Page 75: ...int Then full current is sent to the field coil and armature coil to crank the engine by direct connection with battery As the pull in coil is shortcircuited in this case the plunger is held only by t...

Page 76: ...m the brush holder Remove the brush and remove the yoke from the housing NOTE Do not damage nor put oil on the brush and commutator Remove the armature form the housing Remove two screws magnetic swit...

Page 77: ...ibration is resulted when placing an iron rod on the armature core the layer insulation is favorable NOTE Before inspection remove foreign matters between commutator and segments 2 Commutator Check fo...

Page 78: ...ough correct it by wrapping the commutator with a sand paper No 300 Brush length service limit Standard length 13 5 mm Service limit 9 mm Force of brush spring With a spring scale check the spring for...

Page 79: ...E 1 Do not continue the following tests for more than 5 seconds 2 Perform the test with 1 2 of the rated voltage Check of pull in coil Check that the pinion gear comes out when the terminal of the bat...

Page 80: ...or breakage of the wire connecting the battery and magnetic switch or improper grounding Insufficient tightening of wiring connecting the magnetic switch and motor terminal Replace retighten or corre...

Page 81: ...53 S773 185366190 Y701RS 1 B ie S773L 185366220 YE01 1 4 THERMO SENSOR 1 Specifications Part No 385720010 Temperature Resistance 35 C 670 80 80 C 118 6 105 C 54 5 2 7 115 C 42 2 5 The resistance ratin...

Page 82: ...ctrolyte is based on the temperature of 20 C As the temperature varies 1 C the specific gravity value increases or decreases 0 0007 Therefore measured values can be compensated by the following equati...

Page 83: ...damaged sheath due to vibration etc or loosened connections If any defective points are noticed repair the insulation or replace the wiring harness Be sure to replace the band since it becomes fragil...

Page 84: ...the fuel system Uneven fuel injection Clogged fuel filter Trouble of speed governor Improper function of engine main body Discharge air from the fuel Trouble of injection pump Have corrected or replac...

Page 85: ...belt tension Check and repair Replace Replace Starter does not operate Loosened or disconnected wiring of each part Dropped battery voltage Defective safety switch Trouble in starter Check and install...

Page 86: ...ase Bore 75 75 75 019 75 2 76 2 Over size 0 5 1 0 Distortion of upper face of cylinder block Less than 0 05 0 12 Skirt diameter longer diameter 75 74 9325 74 9475 74 7 Over size 0 5 1 0 Clearance to c...

Page 87: ...ove Roughness main journal and crank pin 1 6Z Crankshaft deflection Less than 0 03 More than 0 06 Axial play of crankshaft 0 05 0 3 0 5 Thickness of thrust washer 2 0 1 95 2 0 1 8 O D I D of bush jour...

Page 88: ...erall length 157 156 8 157 2 Outer diameter 6 3 Wear rocker arm shaft 11 66 11 65 11 668 11 57 Clearance between rocker arm and shaft 0 032 0 068 0 2 Oil clearance Oil pressure switch operating pressu...

Page 89: ...ature C 95 V belt M30 Type 128000 0101 DENSO No of teeth of pinion gear 9 Shifting method of pinion Magnetic shift type Wear of commutator diameter 30 29 Stepped wear of commutator 0 05 0 2 Bending al...

Page 90: ...Bore 77 77 77 019 77 2 77 2 Over size 0 5 Distortion of upper face of cylinder block Less than 0 05 0 12 Skirt diameter longer diameter 77 Over size 0 5 Clearance to cylinder 0 0525 0 0865 0 25 At 20...

Page 91: ...ove Roughness main journal and crank pin 1 6Z Crankshaft deflection Less than 0 03 More than 0 06 Axial play of crankshaft 0 05 0 3 0 5 Thickness of thrust washer 2 0 1 95 2 0 1 8 O D I D of bush jour...

Page 92: ...erall length 157 156 8 157 2 Outer diameter 6 3 Wear rocker arm shaft 11 66 11 65 11 668 11 57 Clearance between rocker arm and shaft 0 032 0 068 0 2 Oil clearance Oil pressure switch operating pressu...

Page 93: ...ature C 95 V belt M30 Type 128000 0101 DENSO No of teeth of pinion gear 9 Shifting method of pinion Magnetic shift type Wear of commutator diameter 30 29 Stepped wear of commutator 0 05 0 2 Bending al...

Page 94: ...7 77 99 77 005 77 2 Over size 0 5 Distortion of upper face of cylinder block Less than 0 05 0 12 Skirt diameter longer diameter 77 77 9225 77 9375 Over size 0 5 Clearance to cylinder 0 0525 0 0865 0 2...

Page 95: ...e Roughness main journal and crank pin 1 6Z Crankshaft deflection Less than 0 03 More than 0 06 Axial play of crankshaft 0 05 0 3 0 5 No 4 bearing holder thickness 21 85 21 95 21 55 O D I D of bush jo...

Page 96: ...rall length 157 156 8 157 2 Outer diameter 6 3 Wear rocker arm shaft 11 66 11 65 11 668 11 57 Clearance between rocker arm and shaft 0 032 0 068 0 2 Oil clearance Oil pressure switch operating pressur...

Page 97: ...mperature C 95 V belt M30 Type 128000 0101 DENSO No of teeth of pinion gear 9 Shifting method of pinion Magnetic shift type Wear of commutator diameter 30 29 Stepped wear of commutator 0 05 0 2 Bendin...

Page 98: ...97 Chapter 3 TRACTOR MAIN BODY...

Page 99: ...ection 4 Remove steel balls springs and other small parts carefully not to miss when overhauling the transmission case and install them without fail at the time of reassembly 5 When driving in a sprin...

Page 100: ...Wheel drive T401 2 DISASSEMBLY INSPECTION REASSEMBLY OF FRONT AXLE 1 Power Steering Cylinder Disassembling procedure 1 Power steering cylinder Remove the power steering cylinder with hoses from the f...

Page 101: ...ogether 4 Transmission case final Remove the bolts of the arms knuckle and take out the right and left case final downwards NOTE Be careful not to damage the oil seal 5 Tie rod ass y Remove the split...

Page 102: ...r King pin Remove the right and left transmission cases and king pin as a set 8 Wheel shaft case left NOTE When any shims have been installed between the case and bearing note their thickness and quan...

Page 103: ...uantity and take care not to miss them 12 Drive pinion Extract the bearing holder rear rearward Remove the lock nut and extract the drive pinion to the inside of the case NOTE Note the thickness and q...

Page 104: ...if necessary NOTE Confirm the direction of the bearing at the top of the king pin before removing it The shield should be positioned lower Inspection and service 1 Final gear and final pinion 1 Rotat...

Page 105: ...0 02 0 16 0 35 3 Oil seal O ring Shaft spline 1 Replace the oil seal and O ring of oil leaks to the outside 2 When the service limit is exceeded replace the shaft or gear and pinion Play of spline in...

Page 106: ...to be used for reassembly Use them and tighten with the specified torque When reusing the bolts remove oil and stain and tighten using lock washer without fail Ring gear tightening torque N m kgf m 2...

Page 107: ...ifferential ass y into the case and adjust the backlash to 0 zero with shims 1 NOTE When backlash is 0 zero the bevel gear of the differential may be sticked closely to the drive shaft leaving gap bet...

Page 108: ...ngth Swing angle 29 1mm 4 30 2 If stopper bolt top surface has worn out unevenly replace the bolt T427 T428 4 FRONT WHEEL 1 Specifications ST318 ST321 ST324 Tire size Rim size Tire size Rim size Agric...

Page 109: ...Dry single plate foot stepping type Rivet recess 1 2 mm No of clutch plates 1 facing 2 Operating method Mechanical Disk O D Bore Thickness 184 127 8 1 0 3 mm 7 3 0 3 330 kg shows the thickness when c...

Page 110: ...or hydrostatic transmission Remove the release bearing release hub clutch shaft and clutch fork in the samp procedure as those for the manual transmission as described above Inspection and service are...

Page 111: ...ut 1 0 mm 3 Release bearing 1 If the fork claws or release hub sliding area are worn out unevenly replace 2 Coat the release hub sliding area with sufficient grease NOTE 1 Do not wash the bearing sinc...

Page 112: ...orrect the clutch disc contacting surface if the damage is insignificant 2 Check the pilot bearing for satisfactory condition on model manual transmission 7 Clutch shaft and pedal shaft 1 Check for th...

Page 113: ...h case shown in the right figure Reassembly and adjustment 1 Pressure plate and clutch disk Align the pressure plate and clutch disk using the special service tool and tighten to the flywheel evenly 2...

Page 114: ...essed 1 Excessive play of clutch pedal 2 1 Excessive wear of various parts of clutch 2 2 Deflection of disk ass y 2 3 Play due to wear of pilot bearing 2 4 Uneven wear of disk hub and drive shaft 1 Ad...

Page 115: ...114 3 3 Transmission 1 9 3 MANUAL TRANSMISSION 1 Sectional view z Without Mid PTO T447 z With Mid PTO T447...

Page 116: ...two nuts and change lever Remove the nut and rod from the change lever case 2 Change lever case Shifter rods Shifter forks Shift arm Remove the bolt and draw out the spring and steel ball Remove the s...

Page 117: ...the same time Remove the shifter forks steel ball and spring from the cover NOTE Hold shop towel over the top of the cover to restrain the detent ball and spring when the shifter rod is removed form t...

Page 118: ...ball 22 Spring pin 9 Change lever 23 Shifter fork Case 24 Spring pin 10 Balk pin 25 Shift arm 11 Rod end R 26 Spring 12 Nut 27 O ring 13 Rod 28 Bolt 14 Rod end L 29 Shift guide 3 Counter gear Remove...

Page 119: ...d gear 10 Collar 11 Fixed gear 12 Bearing 6204 6 Case cover Related 4WD shifter Remove the case cover as an ass y If necessary drive out the spring pin and separate the shift arm and lever 1 Shift arm...

Page 120: ...hen it comes out of the drive pinion at the rear take out the shaft from above the case If necessary remove the needle bearing at the shaft rear end 9 Bearing carrier Differential Remove the right and...

Page 121: ...shaft 1 speed PTO Remove the PTO shaft together with the seal cover and one way clutch ass y rearwards Remove the bearing holder from the case If necessary separate the seal cover and shaft and take o...

Page 122: ...l is not installed Drive out the roll pin and slide the shaft frontwards Remove the thrust washers counter gear and needle bearings from the shaft Extract the shaft frontwards Components 1 Spring pin...

Page 123: ...range inwards If necessary take out the shift guide from the case 17 Differential ass y Remove the ring gear bolts and separate the ring gear from the differential cage Remove the clip and take out th...

Page 124: ...6 Collar 7 Counter gear 8 Thrust washer 9 One way clutch 10 Thrust washer 11 Snap ring 60 12 Counter shaft 13 Ball bearing 6004 14 Snap ring 42 15 Snap ring 42 16 Sealing plug 19 Mid PTO shaft Mid PTO...

Page 125: ...ission case Extract the counter shaft frontwards and take out the counter gear needle bearing collar and thrust washer Inspection 1 Bearing Replace if excessive play or other abnormalities are noticed...

Page 126: ...eded Thrust washer thickness mm Standard dimension Service limit Differential gear side 1 2 0 9 Differential pinion side 1 2 0 9 3 Replace them if the clearance between the pinion shaft and differenti...

Page 127: ...quantity of red lead diluted with oil before disassembly turn the drive pinion and judge the proprietary of the tooth contact from the red lead condition attached to the ring gear teeth 1 Heel contac...

Page 128: ...nce from the error value marked at the drive pinion end value obtained by detecting the error value of the new one from former one For example Error value of defective drive pinion 0 2 Error value of...

Page 129: ...indicator If end play is more than 0 5 mm adjust the end play by shims 1 Mid PTO shaft 2 Shim s 3 Dial indicator Install new seals and sealing plugs on reassembly 2 Shift airm Shift guide PTO and ran...

Page 130: ...load on the outer periphery of spline 68 6 88 2 N 7 9 kgf Drive in the lock for the lock nut positively 5 Thrust washer Install the thrust washer facing the oil groove toward the gear 6 Bearing retain...

Page 131: ...130 7 Transmission for range shift Use care to gearing of each gear when install the cylinder case Ass y Components 1 Transmission ass y Range shift 2 Hydraulic cylinder case T503 T504...

Page 132: ...131 2 HYDROSTATIC TRANSMISSION 1 SPEED PTO MID PTO 1 Sectional view T505 T506...

Page 133: ...et pressure Charge circuit pressure 0 42 0 56 MPa 4 3 5 7 kgf cm2 at Eng 2500 rpm In case pressure 0 098 MPa Less than 1 kgf cm2 Pump capacity variable type 0 16 4 cc rev Motor capacity fixed type 16...

Page 134: ...22 Pin 38 Snap Ring 54 Pin 7 Input Shaft 23 Spring 39 Snap Ring 55 Pin 8 Output Shaft 24 Washer 40 O Ring 56 Socket Head Bolt 9 Valve Plate 25 Snap Ring 41 Bush 57 Socket Head Bolt 10 Valve Plate 26...

Page 135: ...nit 7 Oil pipe to HST unit 2 Oil cooler 8 Suction filter 3 Oil pipe to cooler from HST unit 9 Foot pedal 4 Oil pipe from cooler 10 Oil pipe check valve 5 Line filter 11 Oil pipe return 6 Oil pipe suct...

Page 136: ...efore pumping action is not taken place T512 1 Swash plate inclination angle 2 Valve port plate T513 When the HST pedal is depressed in the forward direction the swash plate is inclined and proportion...

Page 137: ...ssages are connected with the feeding in tube and discharging tube respectively When high pressure oil from the variable pump is fed to the port Ps the piston is pushed and force acts to push the swas...

Page 138: ...rom the charge pump is supplied to the pump and motor through a check valve Excessive oil passes through a low pressure relief valve cools the pump and motor in the case and then returns to the tank T...

Page 139: ...eleration enduring smooth acceleration When the pedal is returned to the neutral position the valve returns to the neutral condition quickly by the change pump pressure The high pressure relief valve...

Page 140: ...forward operation The oil flow is also reverse to that for the forward side but the check valve and relief valve work in the same way as on the forward side T518 Oil flow Reverse position 1 Charge pu...

Page 141: ...out the spring pin of the pedal and remove the pedal pedal support and shift link Extract the shift link together with the shift plate and damper to the inside of the case 2 Drive shaft PTO Remove th...

Page 142: ...e snap ring on the front of the counter shaft and take out the fixed gear thrust washer counter gear and needle bearing NOTE Remove the needle bearing at the end of the counter shaft if any If no need...

Page 143: ...the oil seal from the transmission case front 7 Counter shaft Extract the shaft frontwards and take out the bearing on the front from the shaft Move the shaft frontwards until it comes out of the driv...

Page 144: ...together with the bearing holder If necessary separate the bearing holder from the shaft Remove the coupling and snap ring in the front of the output shaft at the rear of the counter shaft 11 PTO coun...

Page 145: ...Needle bearing 6 Counter gear 7 Thrust washer Small 13 Shifter rod Shifter forks Shift arms PTO and range shift Drive out the spring pin and remove the change lever Range gear PTO Drive out the shifte...

Page 146: ...case Mid PTO Remove the mid PTO gear case from the below of the transmission case NOTE Take care not to damage the transmission case and gear case mating surfaces 16 Mid PTO counter shaft Pry the seal...

Page 147: ...disassembly If end play is more than 0 5 mm adjust the end play by shims when reassembly 2 Inspection and reassembly of hydrostatic transmission Inspection Refer to the paragraph of inspection of 9 3...

Page 148: ...procedure 1 Mid PTO case Check shaft end play using a dial indicator If end play is more than 0 5 mm adjust the end play by shims 1 Mid PTO shaft 2 Shim s 3 Dial indicator Install new seals and seali...

Page 149: ...tappet and spring may fall out 1 Relief valve tappet 2 Spring Remove the valve plate form the port block Usually the valve plate is installed to the port block side If it is installed to the cylinder...

Page 150: ...tor Remove socket head bolts 4pcs and tap the port block with a soft hammer to loosen assembly 1 Socket head bolt 2 Port block 3 Motor case Remove the motor case from the port block Remove the valve p...

Page 151: ...e pins when removing the cylinder block and piston ass y 1 Pin Remove the thrust plate from the swash plate When it is difficult to remove raise the thrust plate using a L shaped rod 1 Swash plate 2 T...

Page 152: ...case 1 Shaft 2 Bearing 3 Case 3 Port block Remove the right and left plugs and take out the check valve poppet spring from the port block NOTE Be careful not to damage the end surface of the port blo...

Page 153: ...rom the case and tap the shaft to remove from the case together with the bearing 6 Swash plate Trunnion plate Remove screws 3 each fixing the right and left covers Tap the trunnion shaft of the swash...

Page 154: ...153 Take out the swash plate from the case T566...

Page 155: ...ter clearance between the piston and cylinder block exceeds the service limit Assembling standard value Service limit 0 02 mm More than 0 04 mm Shoe thickness Assembling standard value Service limit 3...

Page 156: ...43 2 3 6 4 4 35 2 43 2 3 6 4 4 7 1 8 7 0 72 0 88 48 5 59 3 4 9 6 0 33 1 40 5 3 4 4 1 33 1 40 5 3 4 4 1 2 Install the right and left covers to the pump case taking care to the bush joining position in...

Page 157: ...e the pin condition cannot be directly confirmed Assemble the motor cylinder block in the same way Assembling jigs Material Synthetic resin Shape As shown in the right figure Unit mm 5 When installing...

Page 158: ...edal stepping direction varies at the time of measurement depending on the plug Pressure gauge set on the left side of the tractor Pedal stepped frontwards Pressure gauge set on the right side of the...

Page 159: ...1 Eye bolt for Pressure test 2 Drill and tap PT1 8 Install an eye bolt for pressure measurement and install a pressure gauge 0 2 5 MPa 0 25kgf cm2 to eye bolt Increase the engine speed to 2500rpm and...

Page 160: ...stment of HST neutral Raise the tractor rear and front axles so the rear and front wheels are off the ground and place safety stands under the axles Start the engine and place the HST pedal A in the N...

Page 161: ...ve Disassemble wash and them reassemble correction of valve 2 Defective seat of check and high pressure relief valve assembly Repair or replace the check and high pressure relief valve assembly 3 Insu...

Page 162: ...nge system s disassembly and reassembly to refer to 3 3 Transmission in chapter 3 T587 1 Bolt 10 Balk pin 20 Shifter rod 30 Bush 2 Seal washer 11 Rod end R 21 Shifter fork 31 Oil seal 3 Spring 12 Nut...

Page 163: ...162 2 Range shift change lever Rear PTO change lever Mid PTO change lever and 4WD change lever T588...

Page 164: ...RAKE ASS Y NOTE 1 Do not disassembly the brake ass y except when any trouble occurs 2 The stator disk is easily damaged and should be handled carefully not to allow dust etc to stick Dimension measure...

Page 165: ...arts are installed to the right side of the wheel shaft case In case of HST they are installed to the left side 2 Brake cover Stator Disk Lining Remove the brake cover fixing bolt and nut Cover tighte...

Page 166: ...take out the final gear from the shaft 5 Differential shaft Remove the differential shaft from the case If necessary remove the bearing 6306 and oil seal 6 Wheel shaft Drive out the wheel shaft outwa...

Page 167: ...urface Service limit 0 1 mm Check the brake cover steel ball brake cam and spring and replace defective ones Check each bearing gear and shaft and replace if damage or wear is significant Replace oil...

Page 168: ...Standard value on tread Service limit 20 30 mm 40 mm T602 T603 4 REAR WHEEL 1 Specifications Tire size 8 16 9 5 16 29 12 00 15 Rim size 5JA 16 W8 16 10LB 15 Tire type Nylon bias structure with tube 2...

Page 169: ...ake pedal Correct with sand paper and grease up Correct with sand paper and grease up 2 Poor braking effect Insufficient adjustment of the brake pedal Worn or burnt lining Adjust the play Replace the...

Page 170: ...169 6 HAND BRAKE 1 Components T605 1 Bracket 9 Brake Switch 2 Hand brake 10 Nut 3 Bolt 11 Pin 4 Cover 12 Washer 5 Wire 13 Split Pin 6 Wire 14 Bolt 7 Wire Holder 15 Nut 8 Washer...

Page 171: ...ut and disconnect the wire ass y from the hand brake If necessary remove the brake lever hand brake and bracket from the tractor T606 Inspection 1 Check the inner wire for corrosion unwinding or torsi...

Page 172: ...osition Tighten the U nuts 2 as dimension A to 20 mm Tighten the adjusting nuts 3 to the both wires are stretched slightly while push the each brake lever 4 to arrow mark direction brake does not work...

Page 173: ...n Counterclockwise viewed from shaft side 2 Steering Type Full hydraulic type non load reaction type 3 Steering cylinder Stroke mm 166 Bore 35 4 Relief valve Adjusted flow rate min 8 Adjusted pressure...

Page 174: ...O ring 22 Spacer plate 5 Oil seal 23 Drive 6 Needle bearing kit 24 Gerotor 7 Lace bearing 25 O ring 8 Thrust needle 26 O ring 9 Adjust plug 27 Plate 10 O ring 29 End cap 11 Damper collar Relief valve...

Page 175: ...rally with respect to the pin see the figure below for the purpose of composing oil passage for the right and left turn by deviating the spool laterally to the sleeve 2 Drive Movement of the gear pump...

Page 176: ...oil passes through the cavity of the spool notches of the spool and sleeve and port T and is returned to the tank The ports L and R from the steering cylinder are blocked by the sleeve and spool not t...

Page 177: ...tor is rotated counterclockwise the oil is discharged through the sleeve hole and spool groove fed to the cylinder from the port L and the wheels are turned to the left The oil from the port R is retu...

Page 178: ...otor is turned clockwise and oil is discharged through the holes and grooves of the sleeve and spool and fed under pressure to the cylinder form the port R The oil from the port L passes through holes...

Page 179: ...of the operator Resultantly the passage inside becomes negative pressure and the oil from the oil tank moves the check valve bottom and is supplied The oil supplied flows the same passage as in the n...

Page 180: ...O ring 5 4 Remove the gerotor 6 and 7 take care do not fall down rotor 7 5 Remove the O ring 10 from the gerotor 6 Pull out the drive 9 7 Remove the spacer plate 11 and O ring 21 8 Remove the housing...

Page 181: ...earing laces 18 thrust needle bearing 19 oil seal 20 and dust seal 23 from the housing 22 15 Remove the retainer screw 24 retainer pin 25 and steel ball 26 from the housing 16 Measure the depth of the...

Page 182: ...ief adjuster plug 4 in the housing 5 Adjust the relief adjuster plug s depth before disassembly measured dimension At this time will get same relief pressure before disassemble ordinary NOTE The relie...

Page 183: ...ining ring and sleeve for prevent fall down 15 Install the pin in the sleeve 16 Install the sleeve and spool assembly in the housing and as follows Keep the housing to vertical when install the spool...

Page 184: ...les NOTE O ring installed surface against the housing 21 Install the O ring 5 on the plate 4 and install them to the gerotor 22 Install the O ring 3 on the end cap 2 and install them on the gerotor wh...

Page 185: ...t the engine and warm up the transmission oil more than 50 C Keep the engine to high idle speed and slowly turn the steering wheel and observe the gauge immediately Relief valve adjusting pressure 5 9...

Page 186: ...ring cylinder 2 Remove the steering cylinder from axle housing 3 Place the cylinder barrel end in a vise and unscrew the head 1 from the cylinder barrel 2 4 Remove the cylinder rod head and piston fro...

Page 187: ...ged NOTE Never reuse each seal compornents if removed 3 Cylinder head and piston rod Measure the clearance between the bush of the cylinder head and piston rod Replace the bush or piston rod if the se...

Page 188: ...with specified torque then caulk the rod end at 3 points to lock as shown in the right figure Tightening torque 35 3 N m 3 6 kgf m 2 Cylinder head and cylinder tube Insert the assembly of the cylinder...

Page 189: ...n the adaptor 5 and 6 in the figure below with specified torque PF3 8 tightening torque 58 8 78 4 N m 6 8 kgf m Tighten the oil pipe 2 3 and 4 in the figure below with the specified torque M14 tighten...

Page 190: ...ce start the engine turn the steering wheel in both directions at idling speed several times to discharge the air stop the engine and check the hydraulic oil in the oil tank transmission NOTE Turn the...

Page 191: ...urns freely 1 Steering control unit 1 Seizure of spool or sleeve due to dust entry 2 Misalignment with column Replace Correct Cylinder does not follow up sufficiently or at all the rotations of the st...

Page 192: ...ir in the oil 3 Too low air pressure of front tire 4 Too low oil pressure 5 Worn seizure or damaged internal parts of control valve 1 Fill the oil 2 Discharge air or tighten the piping 3 Charge air to...

Page 193: ...m2 Hydraulic cylinder Type Single acting Bore 65 Max lift at the lower link end 6 57kN 670kgf Hydraulic oil Manual transmission model SAE 80 HST Model ISO VG 46 2 NAME OF COMPONENTS HYDRAULIC CIRCUIT...

Page 194: ...193 Model 9 3 shown...

Page 195: ...take out the rod 2 Control lever Remove the lock nut and take out control lever 3 Control valve ass y Main Control valve Remote control valve Remove the clamp for the remote control oil pipes NOTE Be...

Page 196: ...ove the snap ring at both ends and extract the lift arm 7 Hydraulic arm shaft Hydraulic arm Extract the hydraulic arm shaft leftwards and take out the hydraulic arm NOTE Be careful not to miss the O r...

Page 197: ...er case end surface Left side 6 0 mm Right side 6 0 mm 1 Cylinder head When oil in the hydraulic cylinder leaks check the steel ball and guide for wear and replace if defective NOTE Replace the contro...

Page 198: ...when installing 2 Install the lift arm at the angles of elevation and depression as shown in the right figure 3 Coat an O ring with sufficient oil and install Do not use grease 4 Install an O ring an...

Page 199: ...198 4 CONTROL VALVE 1 Control valve relief valve 340013400 1 Name of components T658...

Page 200: ...When valve is at S position When the oil pressure is taken out for front loader etc connect hydraulic piping for an external implement to the ports C1 and C2 and set the valve at the S position Oil e...

Page 201: ...he O ring on the rear side of the valve can be removed and remove the O ring Extract the spool forwards of the valve body and remove 2 O rings NOTE If extracting in either one direction the O ring is...

Page 202: ...uge Complete in a short time Relief set pressure 12 7 13 2 MPa 130 135 kgf cm2 Adjust the set pressure by increase or decrease the number of shims as shown in the right figure The pressure varies abou...

Page 203: ...202 2 Control valve for lifting lowering implement 340016110 1 Name of components T667...

Page 204: ...t but the oil works in the direction to close the valve from the back of the check valve The poppet is closed and shuts off the oil and therefore the oil is kept in the hydraulic cylinder the implemen...

Page 205: ...the oil passes through the outer periphery of the spool open the check valve is fed under pressure to the hydraulic cylinder and the implement ascends At this time when the oil pressure exceeds 12 7...

Page 206: ...sted by adjusting the flow rate by the flow control valve of the hydraulic cylinder case head The implement does not lower when the valve is closed On the other hand the oil fed under pressure from th...

Page 207: ...ontrol valve is set to be Raise position When the oil enters the hydraulic cylinder the lift arm is raised and the rod is pushed to the right This pushes down the center part of the feedback link cont...

Page 208: ...the hydraulic cylinder is returned to the transmission case and the lift arm is lowered Accordingly the rod is pulled to the left side and rotated counterclockwise with the center of the feedback link...

Page 209: ...procedure 1 Lever Control Lever Bracket Drive out the spring pin from the spool and bracket and remove the lever and control lever respectively Remove the bracket from the valve body Tightening torque...

Page 210: ...nd spring Nut tightening torque 18 22 N m 1 8 2 2 kgf m If necessary remove the spool head bypath spool and spring from the spool Spool Head tightening torque 9 8 14 7 N m 1 1 5 kgf m 5 Unload Valve C...

Page 211: ...t Check or if defective replace control valve ass y 2 Check valve Check its seat for uneven wear 3 Unload valve Check the seat for stepped wear Check the sliding part for nicks and burrs 4 Lowering va...

Page 212: ...rising direction Stop the engine set the control lever to lowering direction and stop at any point The lift arm lowers and stop Valve neutral position At this condition do not move the spool remove th...

Page 213: ...dback link Start the engine 800 1000 rpm and set the control lever at the position figure T686 Confirm that the lift arm rises to the uppermost point Untighten the lock nut and drive in the nut rearwa...

Page 214: ...amaged seat surface of the unload valve 2 Damaged seat surface of the relief valve 3 Leakage in the cylinder the same with 2 4 Damaged O ring the same with 2 5 Reduced volume efficiency 6 Clogged line...

Page 215: ...80 HST ISO VG46 7 Lowering speed of the implement is too fast when the engine is stopped with the implement retained at raised position Possible cause and remedy are same as explained in Condition 2 a...

Page 216: ...215 6 REMOTE CONTROL VALVE SINGLE SPOOL 1 Name of components 1 Valve body 8 Cap 2 Spool 9 Bolt 3 Spring seat 10 Bracket 4 Spring 11 Bolt 5 Bolt 12 O ring 6 O ring 13 Wiper ring 7 Plate T690...

Page 217: ...fed to the main control valve It is blocked there are fed under pressure from the port P1 side to the main control valve through the passage as illustrated below The oil from the remote cylinder is cu...

Page 218: ...allow the cylinder rod to be extended On the other hand the oil from the cylinder passes through the port R from the port A and is returned to the transmission case At this time when the oil pressure...

Page 219: ...cylinder rod is contracted On the other hand the oil from the cylinder passes through the port B and port R and is returned to the transmission case At this time also when the oil pressure exceeds 12...

Page 220: ...to damage the oil seal when taking out the spool Remove the wiper ring and O ring of the valve body Only when replacing Remove the bolt and take out the spring seats 2 pcs and spring Inspection and s...

Page 221: ...y are located on the front of the ROPS and it consist of 5W position lamp and 21W turn signal lamp 13 COMBINATION LAMP ASSEMBLY REAR They are located on the rear of the ROPS and it consist of 5W tail...

Page 222: ...TTERY The battery is located front of the radiator 32 FUSIBLE LINK The fusible link is located between B terminal on the starter motor and main harness 33 HEAD LAMP FUSE BOX The fuse boxes for head la...

Page 223: ...221...

Page 224: ...222...

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Page 227: ...auge 9 Illumination lamp 10 Turn signal lamp left 11 Turn signal lamp right 12 Fuel gauge A Hazard indicator lamp B Empty C Empty D Empty E Empty F Empty G Empty H Parking brake indicator lamp I Empty...

Page 228: ...226 4 LIGHTEING CIRCUIT T702...

Page 229: ...227 5 HORN CIRCUIT T703...

Page 230: ...228 6 FUEL LEVEL CIRCUIT T704...

Page 231: ...229 7 ENGINE STOP SOLENOID CIRCUIT T705...

Page 232: ...230 8 ENGINE COOLANT TEMPERATURE CIRCUIT ENGINE OIL PRESSURE WARNING CIRCUIT T706...

Page 233: ...231 9 HST CRUISE CONTROL CIRCUIT T707...

Page 234: ...232 10 PARKING BRAKE WARNING LIGHT CIRCUIT T708...

Page 235: ...233 11 BRAKE LAMP CIRCUIT T709...

Page 236: ...234 12 SAFETY START CIRCUIT T710...

Page 237: ...235 13 FLASHER AND HAZARD LUMP CIRCUIT T711...

Page 238: ...236 14 GLOW PLUG AND GLOW LAMP CIRCUIT T712...

Page 239: ...237 15 ALTERNATOR AND ENGINE STOP SOLENOID CIRCUIT T713...

Page 240: ...t Replace Replace Replace Replace Repair Repair Fuel gauge level Pointer does not move Defective fuel level sensor 4 Defective fuel meter 8 Blown out 5 amp fuse 35 Improper ground Insufficient battery...

Page 241: ...does not work Defective cruise control switch 11 Defective cruise latch relay 10 Defective diode 37 Defective latch magnet 9 Brake switches 16 and 17 are ON position Defective HST brake switch relay...

Page 242: ...arge Replace Replace Repair Repair Replace Replace or correct Replace or correct Replace or correct Replace or correct Replace or correct Replace or correct Flasher and hazard light not illuminated De...

Page 243: ...implements with mounting part in conformity with this standard may be mounted T715 3 Service and cautions for handling of three point link 1 Understand the functions and the method of mounting the im...

Page 244: ...the implement since they are apt to be lost 2 PTO POWER TAKE OFF SHAFT Specifications 1 Rear PTO Model Manual Transmission Hydrostatic Rotating direction Clockwise facing the shaft PTO speed at engin...

Page 245: ...edal play 20 30 More than 40 Release lever height 29 5 30 5 Gear backlash 0 04 0 2 0 6 Clearance of slide gear and shifter fork 0 1 0 3 1 0 Clearance between shifter rod and casing bearing 0 03 0 1 0...

Page 246: ...sure kgf cm2 MPa kgf cm2 12 74 130 12 25 13 23 125 135 Clearance between hydraulic arm shaft and bush 0 02 0 15 0 3 Natural drop of hydraulic system at lower link end mm min 30 5 100 5 Engine stopped...

Page 247: ...Front 0 02 0 2 0 35 Rear 0 02 0 16 0 35 King pin inclination angle 8 Fixed type Toe in 5 5 10 10 Caster 0 Fixed type Camber 3 Fixed type Final gear backlash 0 1 0 25 0 4 Rim run out 3 0 5 0 Wheel lug...

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Shibaura ST318, Workshop Manual

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