Bradco CONTRACTOR 408A BACKHOE Operator'S & Parts Manual Download

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MAINTENANCE

408A BACKHOE HOSE ROUTING

GENERAL INFORMATION

The purpose of this page is to show the hydraulic hose routing be-

tween the backhoe control valve and the various backhoe hydraulic cylin-
ders. This information is helpful when trouble shooting cylinder and control
valve related problems. Simply

match

the number of the hydraulic cylinder

port (shown in the bottom diagram), to the corresponding number on the
backhoe control valve (shown in the top diagram).

1 0

1 1

1 2

BOOM

SWING

LEFT STABILIZER

RIGHT STABILIZER

BUCKET

DIPPER

SWING CYLINDERS

BOOM
CYLINDER

DIPPER
CYLINDER

1 1

1 2

STABILIZER
CYLINDER

(10-RIGHT STABILIZER)

(4-RIGHT STABILIZER)

BACKHOE CYLINDERS

BACKHOE CONTROL VALVE

BUCKET
CYLINDER

6750

12-14-95

Summary of Contents for CONTRACTOR 408A BACKHOE

Page 1: ...OR BRADCO P O Box 266 Delhi Iowa 52223 USA 319 922 2981 800 922 2981 Fax 319 922 2130 A Division of Attachment Technologies Incorporated 75449 408A BACKHOE OPERATOR S PARTS MANUAL OM549 6737 12 17 99...

Page 2: ......

Page 3: ...ing BasicDiggingTechnique SpecialApplications Transporting LUBRICATION H MAINTENANCE L BACKHOESTORAGE M TROUBLESHOOTING N BOLTTORQUE O PRE DELIVERYCHECKLIST R LIMITED WARRANTY S BACKHOEASSEMBLY SERVIC...

Page 4: ......

Page 5: ...Operating Instructions section of this manual or having them be fully trained by an experienced qualified person who has read and completely understands the Safety Precautions and Operating Instructio...

Page 6: ......

Page 7: ...guidelines DANGER Indicatesanimminentlyhazardoussituation whichifnotavoided will result in death or serious injury This signal word is to be limited to the most extreme situations typically for machi...

Page 8: ......

Page 9: ...al for correct operation 13 Reduce speed when driving over rough terrain on a slope or turning to avoid overturning the tractor 14 Do not smoke when refueling the tractor Allow room in the gas tank fo...

Page 10: ...could collapse from under the backhoe 12 Do not lift loads in excess of backhoe capacity 13 Always lower the backhoe bucket and stabilizers to the ground shut off engine remove key and apply the parki...

Page 11: ...prevent the pin from shattering WARNING Escaping fluid under pressure can have sufficient force to penetrate the skin causing serious personal injury Fluid escaping from a very small hole can be almo...

Page 12: ......

Page 13: ...er temperature Power take off off Lights Tortoise slow or minimum setting Horn Hare fast or maximum setting Engine oil pressure Caution Hazard warning Control lever operating direction Axle connect Ro...

Page 14: ...e of printing however we reserve the right to redesign and change the backhoes as may be necessary without notification PREPARINGTHETRACTOR WARNING Never let anyone operate this tractor and backhoe wi...

Page 15: ...f these components This knowledge will be helpful when reading through this manual or when ordering service parts 6744 12 13 95 D D BOOM SWING CONTROLLEVER CONSOLECOVER CONSOLE MAINFRAME STABILIZER CY...

Page 16: ...d will raise the backhoe stabiliz ers Up Both stabilizers are required to be down for proper stability of the backhoe when in operation BOOM SWING LEVER LEFT HAND LEVER Pushing the boom swing lever fo...

Page 17: ...eel the backhoe bucket made contact with anything out of the ordinary stop digging at once Have the obstruction checked by hand If a utility line has been damaged contact the af fected utility at once...

Page 18: ...he unit a wider base for increased stability and to keep the unit from moving or bouncing with backhoe use The front end loader should also be lowered if the unit is so equipped The vehicle should at...

Page 19: ...erator working the bucket lever to keep the bucket level As the bucket moves toward the operator manipulate the boom lever to keep the cut level At the end of the digging cycle crowd the dipper out an...

Page 20: ...any adjusting cuts as needed The basic steps just listed at the same regardless of the excavation All other digging jobs are simply variations of this basic procedure Remem ber to make your cuts in sm...

Page 21: ...the backhoe swing post is over the centerline of the trench connection Dig with the backhoe at extreme swing positions and in as close to the stabilizers as possible Pile the soil on the opposite sid...

Page 22: ...ackhoe upgrade whenever possible It may be necessary to cut a level surface in the hill for the back hoe to sit in when operating on slopes This will allow the backhoe to sit level for digging the mai...

Page 23: ...p the soil from both ends of the bellhole Enlarge the hole enough to allow the workmen adequate working space in the leak area DIGGING STRAIGHT WALL SHALLOW BASEMENTS Begin at one corner and remove as...

Page 24: ...TANT Avoid constant jarring or hammering contact between the spoil pile and the loaded bucket as this may cause premature wear to the backhoepinsandbushings MISCELLANEOUS EXCAVATING BY A WALL To excav...

Page 25: ...to the left on the red swing lock ball handle 3 Engage the boom lock by moving the boom lock handle to the left down therefore locking the boom to the swing post in the transport ing position 4 Raise...

Page 26: ...ng replace them immediately Clean all fittings thoroughly before using grease gun IMPORTANT Avoid excessive greasing Dirt collects on exposed grease and greatly increases wear After greasing wipe off...

Page 27: ...by the lubrication symbols used on this page Always replace any missing grease fittings as soon as possible 8 BUCKET LINK BUSHINGS 8 BOOMCYLINDEREND AND BOOM CYLINDER PIN 8 BOOM SWING POST PIVOT 8 8...

Page 28: ...ll lines fittings and control valve for signs of leakage IMPORTANT Hydraulic fluid level should be checked with backhoe in trans port position WARNING Escapinghydraulic dieselfluidunderpressurecanpene...

Page 29: ...tooth point can be removed from the welded tooth shank by hammering at A on the tooth point or by driving a chisel at B just between the tooth point box section and the tooth shank Install the new po...

Page 30: ...ol valve related problems Simply match the number of the hydraulic cylinder port shown in the bottom diagram to the corresponding number on the backhoe control valve shown in the top diagram 1 6 2 3 4...

Page 31: ...ISASSEMBLYPROCEDURE gland with a spanner wrench while removing the retaining ring 5615 8 21 91 2 Rotate the gland with a spanner wrench available from your dealer until the gland retaining ring appear...

Page 32: ...with a spanner wrench counter clockwise until the gland is free of the cylinder tube 3 Pull the cylinder rod from the cylinder tube 2 Pull the cylinder rod from the cylinder tube same as shown with t...

Page 33: ...ot to damage the seal in the process as it is some what difficult to install A special installation tool is available to help with installing the seal Simply fit the end of the tool over the seal so t...

Page 34: ...e used when installing the piston ring The ring must be stretched carefully over the piston with a smooth round pointed tool MAINTENANCE INSTRUCTIONS RETAINING RING TYPE GLAND 1 After installing the i...

Page 35: ...seal to replace the discarded seal types on all threaded glands THREADEDTYPEGLAND shown on the chart for the thread diameter of the cylinder rod see chart IMPORTANT Do not contact the active surface...

Page 36: ...f the cylinder rod with the vise Damage to the rod could result 5 Use a spanner wrench to rotate the gland clockwise into the cylinder Continue to rotate the gland with the spanner wrench until it is...

Page 37: ...ues when tightening the nuts on the cylinder rod threads 5613 10 16 98 2 Thread Diameter Minimum Maximum 7 8 150 200 1 230 325 1 1 8 350 480 1 1 4 490 670 1 3 8 670 900 1 Thread Diameter WITH 1 25 Rod...

Page 38: ...dirt and grime from the unit Coat the exposed portions of the cylinder rods with grease Lubricate all grease fittings Make sure the backhoe hydraulic system is properly sealed against contaminates ent...

Page 39: ...linder Swing speed control Open swing speed completely closed control valve Backhoe lifting or swing Cold oil Warm oil with engine at ing too slowly idle speed Engine speed too slow Open throttle Oil...

Page 40: ...nd refill oil replace filter Air entering suction line Eliminate leaks to pump Partially plugged inlet Clean filter element filter Control valve held Return control to open too long neutral position w...

Page 41: ...oil lines Replace hose and check for leaks Swing cylinder Oil leaking past pack Replace packing or malfunctioning ing or seals seals Faulty relief valve Clean or replace Control valve sticking or Dir...

Page 42: ...13 6 976 3 1 25 40 250 300 338 8 406 5 580 696 786 5 943 8 900 1080 1220 4 1464 5 1 1 8 25 58 800 880 1084 8 1193 3 1280 1440 1735 7 1952 6 1 1 4 31 75 1120 1240 1518 7 1681 4 1820 2000 2467 9 2712 0...

Page 43: ...arities 4 _____ Remove paint from finished chrome surfaces of cylinders and valve spools 5 _____ Backhoe control levers function and direction of operation are in accordance with the control lever dec...

Page 44: ...y claims under this warranty must be made within fifteen 15 days after the Buyer learns of the facts upon which such claim is based All claims not made in writing and received by BRADCO within the tim...

Page 45: ...NGCYLINDER 81827 STABILIZERCYLINDER 83397 BOOMCYLINDER SN 8408AX973 AND UP 85663 UP TO SN 8408AX972 81611 DIPPERCYLINDER SN 8408AX973 AND UP 85672 UP TO SN 8408AX972 81641 BUCKETCYLINDER SN 8408AX973...

Page 46: ...MAINFRAMEASSEMBLY ASSEMBLY 85700 MAINFRAME 7459 6 5 98 1 2 3 4 5 6 7 8 7 6 9 4 3 2 10 1 12 10 1 11 SERIAL 8408AX973 AND UP...

Page 47: ...ap Ring 7 2 6615 Bearing 8 1 83392 Mainframe Includes 4 83815 Bushings Installed with Locktite Grade 680 9 As Req d 83975 Thrust Washer 1 38 X 031 As Req d 83976 Thrust Washer 1 38 X 090 As Req d 8397...

Page 48: ...MAINFRAMEASSEMBLY ASSEMBLY 85700 SWING POST 7461 6 8 98 1 2 3 4 5 6 7 8 9 9 9 8 8 10 10 11 SERIAL 8408AX973 AND UP 1 3 4...

Page 49: ...534 Pin 8 As Req d 83975 Thrust Washer 1 38 X 031 As Req d 83976 Thrust Washer 1 38 X 090 As Req d 83977 Thrust Washer 1 38 X 125 9 3 1650 Snap Ring 10 81828 Bushing Included in Swing Post Installed w...

Page 50: ...MAINFRAMEASSEMBLY ASSEMBLY 85700 SWINGCYLINDER 7463 6 8 98 1 2 4 5 6 3 4 5 7 8 9 10 11 13 8 SWING POST MAINFRAME 13 12 SERIAL 8408AX973 AND UP 14...

Page 51: ...cer 4 4 68057 Thrust Washer 5 82441 Needle Bearing Included in Swing Cylinder Assembly 6 2 81827 Swing Cylinder Assembly Includes 2 82441 Needle Bearings and 2 62523 Bushings 2 6616 Grease Zerk 2 3016...

Page 52: ...MAINFRAMEASSEMBLY ASSEMBLY 85700 STABILIZERS 7465 6 8 98 1 2 3 1 2 1 2 3 1 2 2 4 5 6 7 MAINFRAME SERIAL 8408AX973 AND UP...

Page 53: ...25 X 078 As Req d 64727 Thrust Washer 1 25 X 145 As Req d 64728 Thrust Washer 1 25 X 031 3 4 81846 Pin 4 2 83397 Stabilizer Cylinder Assembly 4 6616 Grease Zerk 5 2 83393 Stabilizer Arm 6 2 83257 Pin...

Page 54: ...HOSEBUNDLECLAMPS 7392 4 22 98 1 2 3 3 2 1...

Page 55: ...se Bundle Clamp 3 2 1837 38 UNC Deformed Lock Nut 4 1 84718 Left Hose Bundle Clamp SERIAL 10065 AND UP NO REQ D PART NO DESCRIPTION 1 2 1043 38 UNC X 1 00 Hex Capscrew 2 1 84718 Right Hose Bundle Clam...

Page 56: ...MAINFRAMEASSEMBLY ASSEMBLY 83371 MAINFRAME 6720 6 5 98 2 1 2 3 4 5 6 7 8 9 10 7 6 11 4 3 2 12 1 14 12 1 13 15 15 16 16 17 18 UP TO SERIAL 8408AX972...

Page 57: ...h Locktite Grade 680 9 1 82090 Swing Lock Pin 10 4 6886 Rubber Bumper 4 1542 50 UNC Lock Nut 11 As Req d 83975 Thrust Washer 1 38 X 031 As Req d 83976 Thrust Washer 1 38 X 090 As Req d 83977 Thrust Wa...

Page 58: ...MAINFRAMEASSEMBLY ASSEMBLY 83371 SWING POST 6722 6 8 98 2 1 2 3 4 5 6 7 8 9 9 9 8 8 10 10 11 4 2 3 1 UP TO SERIAL 8408AX972...

Page 59: ...wing Post Includes 2 81828 Bushings Installed with Locktite Grade 680 7 1 82534 Pin 8 As Req d 6623 Thrust Washer 1 38 X 031 As Req d 64724 Thrust Washer 1 38 X 090 As Req d 64725 Thrust Washer 1 38 X...

Page 60: ...MAINFRAMEASSEMBLY ASSEMBLY 83371 SWINGCYLINDER 6724 6 8 98 3 1 2 4 5 6 3 4 5 7 8 9 10 11 13 8 SWING POST MAINFRAME 13 12 UP TO SERIAL 8408AX972...

Page 61: ...82441 Needle Bearing Included in Swing Cylinder Assembly 6 2 81827 Swing Cylinder Assembly Includes 2 82441 Needle Bearings and 2 62523 Bushings 2 6616 Grease Zerk 2 30137 Tee 7 4 53031 90 Grease Zerk...

Page 62: ...MAINFRAMEASSEMBLY ASSEMBLY 83371 STABILIZERS 6726 6 8 98 2 1 2 3 1 2 1 2 3 1 2 2 4 5 6 7 MAINFRAME UP TO SERIAL 8408AX972...

Page 63: ...NO DESCRIPTION 1 8 1652 Snap Ring 2 As Req d 57693 Thrust Washer 1 25 X 078 As Req d 64727 Thrust Washer 1 25 X 145 As Req d 64728 Thrust Washer 1 25 X 031 3 4 81846 Pin 4 2 83397 Stabilizer Cylinder...

Page 64: ...SEATASSEMBLY 6731 12 8 95 1...

Page 65: ...NO REQ D PART NO DESCRIPTION 1 1 6980 Seat SEATASSEMBLY 6732 12 8 95...

Page 66: ...BOOM DIPPER ASSEMBLY ASSEMBLY 85699 7455 6 10 98 1 2 2 3 6 7 8 9 2 2 2 2 8 8 9 4 10 11 11 11 11 12 13 14 18 16 17 19 20 21 4 5 SERIAL 8408AX973 AND UP 12 15 26 27 24 22 23 25...

Page 67: ...acket 17 1 86897 88 UNC Bolt 18 2 1961 38 UNC X 50 Flange Head Hex Capscrew 19 1 86639 Boom Lock 20 1 86880 Pin 1 38 x 6 66 Serial 11168 and UP 81677 Pin 1 38 x 5 78 UP to Serial 11168 21 2 1837 38 UN...

Page 68: ...OOM DIPPER ASSEMBLY ASSEMBLY 85699 7457 6 10 98 1 4 4 3 2 2 3 5 3 2 5 3 2 11 11 11 12 12 15 16 15 17 3 18 11 BUCKET NOT INCLUDED IN BOOM DIPPER ASSEMBLY 13 10 14 3 2 15 SERIAL 8408AX973 AND UP 6 8 7 9...

Page 69: ...r Link 11 81610 Bushing 4 Included in Dipper 4 Included in Bucket Link Installed with Locktite Grade 680 12 83368 Spacer 2 Included in Dipper 1 Included in Bucket Link 13 1 85715 Dipper Includes 4 816...

Page 70: ...BOOM DIPPER ASSEMBLY ASSEMBLY 81813 7451 6 4 98 1 2 3 3 4 1 1 1 7 8 9 10 3 3 3 3 9 9 10 5 6 11 12 12 12 12 13 14 15 19 17 18 13 20 21 22 23 24 16 5 6 23 UP TO SERIAL 8408AX972...

Page 71: ...mp Plate 8 1 81882 Rubber Spacer 9 3 6616 Grease Zerk 10 81610 Bushing Included in Boom Install with Locktite Grade 680 11 1 81678 Pin 12 4 1650 Snap Ring 13 2 6562 Spring Washer 14 1 1739 88 UNC Lock...

Page 72: ...R ASSEMBLY ASSEMBLY 81813 7453 6 4 98 1 1 2 5 5 4 3 3 4 6 7 8 9 10 3 4 10 4 3 11 12 13 14 15 17 17 17 18 18 21 22 21 23 4 24 17 BUCKET NOT INCLUDED IN BOOM DIPPER ASSEMBLY 19 16 20 4 3 21 UP TO SERIAL...

Page 73: ...07 Spacer Tube 13 1 1514 38 Flat Washer 14 1 1503 38 Lock Washer 15 1 1043 38 UNC X 1 00 Hex Capscrew Installed with Locktite Grade 242 16 1 83411 Dipper Link 17 81610 Bushing 4 Included in Dipper 4 I...

Page 74: ...CONSOLEASSEMBLY ASSEMBLY 85701 7382 12 17 99 2 1 2 3 3 4 5 6 7 7 8 9 10 11 12 13 13 13 16 15 14 17 1...

Page 75: ...t 6 1 83235 Control Lever Boot 7 2 2558 M10 Hex Nut 8 1 85826 Boot Support Plate 9 2 1001 25 UNC X 50 Hex Capscrew 10 2 1501 25 Lock Washer 11 1 83373 Console 12 2 1837 38 UNC Deformed Lock Nut 13 8 1...

Page 76: ...VALVEASSEMBLY ASSEMBLY 2233 7386 12 16 99 2 1 1 2 2 3 4 5 2 3 6 11 7 2 1 1 8 9 8 12 10...

Page 77: ...l Adapter 4FP 6FJX 5 1 3185 Needle Valve Speed Control 6 1 3137 Straight Adapter 4MP 6MJ 7 1 3430 90 Street Adapter 6FJX 6MJ 8 2 3103 Straight Adapter 8MBo 8MJ 9 1 30015 45 Street Adapter 8FJX 8FJ 10...

Page 78: ...BUCKET SECTION 45725 DIPPER SECTION 45726 BOOM SECTION 45722 SWING SECTION 45723 ENDCAP WITH RE TURN 45728 ENDCAP WITH RELIEF 45727 STABILIZER SECTION 45724 1 1 1 1 2 3 4 4 4 4 4 4 5 5 5 5 6 6 6 6 7 8...

Page 79: ...stick Assembly Includes Items 1 2 4 5 6 7 8 9 10 13 45718 Right Joystick Assembly Includes Items 1 3 4 5 6 7 8 9 11 14 2 86338 Knob 15 2 85837 Stabilizer Control Lever 16 85511 Complete Valve Assembly...

Page 80: ...VALVEASSEMBLY REPLACEMENT PARTS HYDROIRMA VALVE 7388 12 11 98 2 1 2 2 3 6 7 8 8 8 8 9 10 11 12 13 14 15 16 11 18 17 19 20 21 8 3 3 5 4...

Page 81: ...lve Section Boom 15 45723 Valve Section Swing 16 45724 Valve Section Stabilizers 17 45725 Valve Section Bucket 18 45726 Valve Section Dipper 19 45727 Endcap With Relief 20 45730 Float Assembly Spool N...

Page 82: ...CONSOLEASSEMBLY ASSEMBLY 83372 6710 8 28 96 2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18...

Page 83: ...3 Ball Handle 7 2 81871 Control Handle 8 1 83235 Control Lever Boot 9 2 1242 50 UNC Jam Nut 10 1 83373 Console 11 3 1029 31 UNC X 2 75 Hex Capscrew 12 3 1926 31 UNC U Nut 13 4 1042 38 UNC X 75 Hex Cap...

Page 84: ...VALVEASSEMBLY ASSEMBLY 2230 6718 8 28 96 2 1 2 3 2 3 4 3 3 4 5 5 6 6 4 4 4 6 4 4 4 3 7 8 9 6 2 2 9 10...

Page 85: ...J 4 8 3336 O Ring Adapter 10MBo 4FP 5 2 3283 90 Adapter 10MBo 8MJ 6 6 3001 90 Adapter 4MP 6MJ 7 1 3185 Needle Valve 8 1 3137 Male Connector 4MP 6MJ 9 45633 Restrictor with Spring 076 Dia Orifice Inclu...

Page 86: ...VALVE ASSEMBLY 6962 9 21 98 2 INLET 4710 OUTLET 4690 DIPPER 45648 BUCKET 45648 RIGHT STABILIZER 4704 LEFT STABILIZER 4704 SWING 45665 BOOM 45651 RIGHT MECHANICAL JOYSTICK ASSEMBLY 45656 LEFTMECHANICA...

Page 87: ...VALVEASSEMBLY GRESEN INLET COVER 1 6967 5 22 96 TORQUE TO 14 ft lbs TORQUE TO 20 ft lbs 2...

Page 88: ...1 4710 Inlet Cover 10 Ports 2 1 45148 WH Main Relief Valve Assembly 2250 PSI VALVEASSEMBLY GRESENINLETCOVER 6968 5 22 96 NOTES Valve Section Seal Kit 4653 contains 3 Exhaust Passage O Ring Seals and 2...

Page 89: ...ECTION ASSEMBLY 45648 408 Dipper Bucket Section 509 511 609 611 Dipper Section 6943 5 25 99 3 1 2 3 5 6 4 TORQUE TO 10 ft lbs TORQUE TO 10 ft lbs 2 TORQUE TO 14 ft lbs TORQUE TO 20 ft lbs TORQUE TO 20...

Page 90: ...sed in 408 Dipper Section Top Port 1 45633 Restrictor with Spring 076 Dia Orifice Used in 408 Bucket Section Bottom Port VALVEASSEMBLY GRESEN VALVE SECTION ASSEMBLY 45648 408 Dipper Bucket Section 509...

Page 91: ...Y GRESEN VALVE STABILIZER SECTION ASSEMBLY 4704 6947 5 20 96 Horizontal Handle Assembly 45586 Not included in Valve Section Assembly 4704 1 2 2 3 4 5 6 TORQUE TO 20 ft lbs TORQUE TO 20 ft lbs TORQUE T...

Page 92: ...45654 Unlocking Piston VALVEASSEMBLY GRESEN VALVE STABILIZER SECTION ASSEMBLY 4704 6948 5 20 96 NOTES Items without part numbers are not sold separately Valve Section Seal Kit 4653 contains 3 Exhaust...

Page 93: ...EMBLY GRESEN VALVE SECTION ASSEMBLY 45665 408 Swing Section 1 2 3 2 4 5 6 6969 9 21 98 2 TORQUE TO 14 ft lbs TORQUE TO 20 ft lbs TORQUE TO 10 ft lbs TORQUE TO 10 ft lbs TORQUE TO 14 ft lbs TORQUE TO 2...

Page 94: ...VALVE ASSEMBLY BUT NOT IN VALVE SECTION 2 45633 Restrictor with Spring 076 Dia Orifice VALVEASSEMBLY GRESEN VALVE SECTION ASSEMBLY 45665 408 Swing Section 6970 9 21 98 2 NOTES Items without part numbe...

Page 95: ...EMBLY GRESEN VALVE SECTION ASSEMBLY 45651 408 Boom Section 6971 9 21 98 2 1 2 3 2 4 5 6 TORQUE TO 14 ft lbs TORQUE TO 20 ft lbs TORQUE TO 10 ft lbs TORQUE TO 10 ft lbs TORQUE TO 14 ft lbs TORQUE TO 20...

Page 96: ...ing 095 Dia Orifice Used in 408 Boom Section Top Port 1 45643 Restrictor with Spring 109 Dia Orifice Used in 408 Boom Section Bottom Port VALVEASSEMBLY GRESEN VALVE SECTION ASSEMBLY 45651 408 Boom Sec...

Page 97: ...VALVEASSEMBLY GRESENOUTLETCOVER 6955 5 20 96 1 3 2 TORQUE TO 20 ft lbs OPTIONAL 5 4 TORQUE TO 20 ft lbs...

Page 98: ...g Seal 4693 3 1 3234 Plug OPTIONAL 4 6977 Closed Center Plug Assembly Includes Main O Ring Seal 4693 5 4698 Power Beyond Sleeve Assembly Includes Main O Ring Seal 4693 VALVEASSEMBLY GRESENOUTLETCOVER...

Page 99: ...VALVEASSEMBLY LEFT MECHANICAL JOYSTICK ASSEMBLY 45655 RIGHT MECHANICAL JOYSTICK ASSEMBLY 45656 6959 5 16 96 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17...

Page 100: ...acket Right 8 1 45661 Rod End Stud 9 1 1271 Screw 10 3 45660 Spacer 11 3 1942 Lock Nut 12 1 45663 Handle Plate Assembly Includes Items 13 through 17 13 1 45671 Mechanical Joystick Plate 14 1 1087 Scre...

Page 101: ...VALVEASSEMBLY 5997 5 21 96 2 Horizontal Handle and Bracket Assembly 45586 2 1 2 3 5 6 4 TORQUE TO 10 ft lbs...

Page 102: ...3 1 Pin 4 1 Link 1 Link Plate 5 2 Screw 6 1 Bracket VALVEASSEMBLY Horizontal Handle and Bracket Assembly 45586 5998 5 21 96 2 NOTE All parts marked with an asterisk are included in Horizontal Handle a...

Page 103: ...22 96 1 SpoolPositionerAssembly a b c d e 5 PortRestrictorandSpringAssembly a b 6 WH Main Relief Valve Assembly a b c d 3 a b c d e Cylinder Port Relief Anti Cav CheckAssembly 4 LockoutCheckAssembly...

Page 104: ...close tolerances only the seals may be serviced in the field 4822 Seal Kit a O Ring Seal b Backup Ring c O Ring Seal d Backup Ring e O Ring Seal 4 4819 Lockout Check Assembly Due to close tolerances o...

Page 105: ...CYLINDERASSEMBLY SWING CYLINDER ASSEMBLY 81827 6692 12 4 95 1 2 3 4 5 6 7 8 9 10 12 11 13 14 15 16...

Page 106: ...ylinder Tube 5 1 81963 Piston 6 1 1483 Hex Nut 7 1 62523 Self Aligning Bushing 8 1 45389 Rod Wiper 9 1 45250 O Ring 10 1 45219 Poly Pak Seal 11 1 4510 Back Up Ring 12 1 4509 O Ring 13 1 5421 Washer 14...

Page 107: ...CYLINDERASSEMBLY STABILIZER CYLINDER ASSEMBLY 83397 6698 12 4 95 14 1 2 4 5 3 6 7 8 9 10 11 12 13...

Page 108: ...3 1 50252 Piston 4 1 77458 Cylinder Gland 5 1 83399 Cylinder Rod 6 1 4645 O Ring 7 1 4644 Piston Ring 8 1 4641 O Ring 9 1 5421 Washer 10 1 4509 O Ring 11 1 4510 Back Up Ring 12 1 45219 Poly Pak Seal...

Page 109: ...CYLINDERASSEMBLY BOOM CYLINDER ASSEMBLY 85663 SERIAL 8408AX973 AND UP 7469 6 9 98 1 2 3 4 5 11 6 7 8 9 10 13 12...

Page 110: ...1 45249 Back Up Washer 8 1 65465 Gland Retaining Rod 9 1 4914 Rod Wiper 10 1 85666 Cylinder Rod 11 1 82857 Piston 12 1 45225 Poly Pak Seal 13 1 85645 Cylinder Gland CYLINDERASSEMBLY BOOM CYLINDER ASSE...

Page 111: ...CYLINDERASSEMBLY BOOM CYLINDER ASSEMBLY 81611 6694 12 4 95 1 2 3 4 5 6 9 8 7 11 10 12 13 14 6...

Page 112: ...449 Cylinder Gland 5 1 82450 Cylinder Rod 6 2 6615 Self Aligning Bushing 7 1 45250 O Ring 8 1 45251 Piston Ring 9 1 4641 O Ring 10 1 45557 O Ring 11 1 45249 Back Up Ring 12 1 45225 Poly Pak Seal 13 1...

Page 113: ...45249 Back Up Washer 8 1 65465 Gland Retaining Rod 9 1 4914 Rod Wiper 10 1 85675 Cylinder Rod 11 1 83113 Piston 12 1 45225 Poly Pak Seal 13 1 85645 Cylinder Gland CYLINDERASSEMBLY DIPPER CYLINDER ASS...

Page 114: ...CYLINDERASSEMBLY DIPPER CYLINDER ASSEMBLY 81641 6696 12 4 95 1 2 3 6 9 8 7 4 5 10 14 6 13 12 11...

Page 115: ...2449 Cylinder Gland 5 1 81643 Cylinder Rod 6 2 6615 Self Aligning Bushing 7 1 45250 O Ring 8 1 45251 Piston Ring 9 1 4641 O Ring 10 1 45557 O Ring 11 1 45249 Back Up Ring 12 1 45225 Poly Pak Seal 13 1...

Page 116: ...CYLINDERASSEMBLY BUCKET CYLINDER ASSEMBLY 85677 SERIAL 8408AX973 AND UP 7473 6 9 98 1 2 3 4 5 6 7 8 9 10 11 12 14 13...

Page 117: ...Ring 8 1 4510 Back Up Washer 9 1 7165 Gland Retaining Rod 10 1 4974 Rod Wiper 11 1 85680 Cylinder Rod 12 1 50252 Piston 13 1 45219 Poly Pak Seal 14 1 62770 Cylinder Gland CYLINDERASSEMBLY BUCKET CYLI...

Page 118: ...CYLINDERASSEMBLY BUCKET CYLINDER ASSEMBLY 81634 6690 12 4 95 1 2 3 4 5 7 8 9 10 15 14 13 12 11 6...

Page 119: ...linder Gland 5 1 81636 Cylinder Rod 6 2 6615 Self Aligning Bushing 7 1 4645 O Ring 8 1 4644 Piston Ring 9 1 4641 O Ring 10 1 5421 Washer 11 1 4509 O Ring 12 1 4510 Back Up Ring 13 1 45219 Poly Pak Sea...

Page 120: ......

Page 121: ...hose routing between the backhoe control valve and the various hydraulic cylinders Simply match the letter on the control valve port to the same letter on the hydraulic hose ends Example Hose Assembl...

Page 122: ...0 509A BACKHOE UP TO SERIAL 11640 6700 12 17 99 3 1 D 1 J 4 B 2 H 1 C 1 I 1 J 1 D 4 B 2 H 1 C 1 I 3 3 30137 TEE LOCATED IN MAINFRAME ASSEMBLY RIGHTSTABILIZER CYLINDER SWING CYLINDERS MAINFRAME LEFTSTA...

Page 123: ...show the hydaulic hose routing between the backhoe control valve and the various hydraulic cylinders Simply match the letter on the control valve port to the same letter on the hydraulic hose ends Exa...

Page 124: ...VALVE ASSEMBLY 85918 7467 6 8 98 1 A 1 G 2 E 2 K 2 F 2 L 2 K 2 E 2 F 2 L 1 A 1 G BUCKET CYLINDER SWING POST MAINFRAME BOOMCYLINDER BOOM CUTAWAY VIEW DIPPER DIPPERCYLINDER G L K A E F B H C I D J HIID...

Page 125: ...arious hydraulic cylinders Simply match the letter on the control valve port to the same letter on the hydraulic hose ends Example Hose Assembly labeled G runs from the lower Boom port on the hydrauli...

Page 126: ...ET ASSEMBLY 81877 6708 9 21 98 2 HYDRAULIC CONTROL VALVE A F G K L B C D H I J E 1 A 1 G 2 E 2 K 2 F 2 L 2 K 2 E 2 F 2 L 1 A 1 G BUCKET CYLINDER SWING POST MAINFRAME BOOMCYLINDER BOOM CUTAWAY VIEW DIP...

Page 127: ...hydraulic cylinders Simply match the letter on the control valve port to the same letter on the hydraulic hose ends Example Hose Assembly labeled G runs from the lower Boom port on the hydraulic contr...

Page 128: ...STABILIZERPADS 6733 12 12 95 1 2 3 4 5 6 7 8 5 6 9 10...

Page 129: ...Grouser Stabilizer Pad RUBBER STABILIZER PAD ASSEMBLY 81862 3 2 83418 Rubber Stabilizer Pad Assembly Includes Items 4 through 10 4 1 83419 Stabilizer Pad 5 4 1226 38 UNC Hex Nut 6 4 1503 38 Lock Washe...

Page 130: ...STABILIZERPADS FLIP OVER STABILIZER PAD ASSEMBLY 83091 COMPLETE SET OF 2 FLIP OVER PADS ASSEMBLY 83058 7023 11 1 96 1 2 3 4 5 3 4 6 7 6 7 8 8 8 9 9 9 10 11...

Page 131: ...7 Thrust Washer 1 25 X 125 5 1 83096 Pin 6 6 1837 38 UNC Hex Deformed Lock Nut 7 6 1514 38 Flat Washer 8 3 51190 Slide Plate 9 1 64412 Rubber Strip Bundle 10 4 1053 38 UNC X 3 50 Hex Capscrew 11 2 105...

Page 132: ...YLINDER COVER OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER STABILIZER CYLINDER COVER ASSEMBLY 83850 7025...

Page 133: ...910 1 25 Clamp Assembly 4 2 83911 Guide Ring 5 4 1575 38 UNC X 50 Set Screw OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER...

Page 134: ...BUCKETASSEMBLIES 6735 12 12 95 1 2 3 4 5 6 7 8 10 9 11...

Page 135: ...ucket Weldment 81718 18 Bucket Weldment 81724 24 Bucket Weldment 6 81667 Replacement Right Side Cutter 7 81668 Replacement Left Side Cutter 8 81906 10 Replacement Front Cutter Edge 81902 12 Replacemen...

Page 136: ...FIRSTLINEREPAIRKIT ASSEMBLY 83649 6729 12 8 95 1 2 3 4 5 6 7 8 9...

Page 137: ...45618 Seal Kit Boom Dipper Cylinders 2 1 6886 Rubber Bumper 3 4 81610 Bushing 4 4 6616 Grease Zerk 5 4 6397 Bucket Tooth 6 4 1650 Snap Ring 1 38 7 4 6623 Thrust Washer 1 38 X 031 8 1 65349 Cylinder S...

Page 138: ...DECALASSEMBLY ASSEMBLY 40253 6716 12 26 95 3 4 5 6 1 2 7 10 8 10 11 12 13 9...

Page 139: ...l Warning Decal 5 1 4170 Petcock Operation Decal 6 1 40151 High Pressure Fluid Decal 7 1 40249 Swing Lock Decal 8 1 4338 Made In U S A 9 1 40219 Boom Lock Decal 10 5 4084 Grease 8 Hour Decal 11 2 4014...

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Bradco CONTRACTOR 408A BACKHOE, Operator'S & Parts Manual

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Summary of Contents for CONTRACTOR 408A BACKHOE

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