Yuchai U27 Instruction Manual Download

Page: 76 / 144

4-22

After operation

1. Check

Check the engine water temperature, hydraulic oil temperature, oil pressure, fuel level, etc. on the machine's digital

monitor.

2. Lock

The following parts must be locked.

1) Fuel tank filler port

2) Engine hood

Note: When opening the engine hood, no one can stand behind the engine hood, be careful of hurting

the human body when the engine hood pops up.

Summary of Contents for U27

Page 1: ...U27Hydraulic Excavator Instruction Manual Guangxi Yuchai Heavy Industry Co Ltd...

Page 2: ...ut the safe operation of the machine Understand and get familiar with all the safety signs on the machine Ask irrelevant people to leave the worksite Before officially operating this machine at the wo...

Page 3: ...PREVENTION 2 24 BATTERY 2 25 HYDRAULIC SYSTEM 2 26 3 PARTS INTRODUCTION OVERVIEW OF CONTROLS 3 2 SECURITY LOCK PART 3 3 SWITCH ASSEMBLY 3 4 ELECTRICAL CONTROL PANEL 3 5 PANEL METER 3 6 OPERATION OF WO...

Page 4: ...TABLE 5 12 REGULAR INSPECTION AND MAINTENANCE TABLE CONTINUED 5 13 ROUTINE INSPECTION 5 14 ENGINE FUEL SYSTEM 5 15 ENGINE COOLING SYSTEM 5 18 ENGINE LUBRICATION SYSTEM 5 21 ENGINE AIR INTAKE SYSTEM 5...

Page 5: ...1 1 Preface...

Page 6: ...uchai Heavy Industry to overhaul and adjust the machine and use the original accessories and spare parts provided by our company If you use the non original accessories or components there may be no o...

Page 7: ...achine information the nameplate of the machine is on the front left side of the platform Engine information Model Serial number Hydraulic excavator Model YG Rated power Factory number Machine weight...

Page 8: ...below table When you need to purchase machine parts or want to obtain relevant information you can inform Yuchai Heavy Industry of these codes Please record these numbers and keep them together with...

Page 9: ...1 5 Machine direction The front back left right up and down in this manual refer to the directions shown in the figure Down Right Left Front Rear Up...

Page 10: ...Boom 6 Boom cylinder 7 Cab shed 8 Instrument 9 Seat frame assembly 10 Covering part 11 Platform 12 Track 13 Walking reducer 14 Drive wheel 15 Thrust wheel 16 Supporting wheel 17 Rotary support 18 Fra...

Page 11: ...tion guide and annex guide for detailed operation essentials Run in The machine has been fully adjusted and checked before delivery It will accelerate the performance degradation and shorten the servi...

Page 12: ...the possible danger level can be distinguished through the following warning words It also includes the preventive measures to avoid risks Danger It means that if it is not avoided the consequences of...

Page 13: ...2800 C Total height to boom top mm 1640 D Total width mm 1500 E Total height during transportation mm 2490 F Counterweight ground clearance mm 525 G Minimum ground clearance mm 320 H Tail turning radi...

Page 14: ...device mm 1950 FF Maximum ground digging radius mm 4400 GG Maximum digging radius mm 4520 HH Maximum pushing height of bulldozer shovel mm 340 JJ Maximum pushing depth of bulldozer shovel mm 255 Maxi...

Page 15: ...Maximum system flow 61 6 L min at 2200 rpm System rated pressure 24 MPa Rotary pressure 17 5 MPa Auxiliary 1 Auxiliary 2 pressure 21 MPa Pilot pressure 3 5 MPa Oil return 10 m filter element Oil sucti...

Page 16: ...hine body The following are all non standard auxiliary working devices provided by our company Buckets Bucket accessories directly mounted on the stick Bucket accessories for use with quick change cou...

Page 17: ...2 1 Safety regulations...

Page 18: ...all it engage in the use or operation prohibited by the instruction This excavator should be operated and maintained by trained and qualified personnel Before starting all functions of the machine sha...

Page 19: ...rdance with the relevant procedures The safety reminders of this machine are indicated with words such as Danger Warning or Caution The following are their corresponding explanations Danger It means t...

Page 20: ...t belts etc before operation or maintenance 2 If the operator s hair is too long please tie it up and cover it with a safety cap to prevent it from being entangled by the machine 3 The user must provi...

Page 21: ...t that needs to be replaced make sure that the new part is equipped with a sign Please contact our agent to obtain a new safety sign 1 Classification of safety signs The safety signs in this manual an...

Page 22: ...2 6 2 Safety sign pasting location The sign shown in the graphics is only the safety sign part of all signs and the rest of the function signs will be introduced in the following chapters...

Page 23: ...ay away from the working devices Movement of the working devices can cause personal injury A safe distance must be kept from the working area of the working device 2 Hydraulic oil refueling sign 3 Rig...

Page 24: ...tion points It is required to check whether the mechanism lubricated at the injection points is lubricated normally every day 2 Daily maintenance and service shall be carried out in strict accordance...

Page 25: ...2 9 13 Safety sign 14 Tail trademark 15 Warning sign 16 Throttle sign 17 Bulldozing operation 18 Manipulation sign...

Page 26: ...getting on or off the machine When getting on and off the car move slowly grab the handrails on both sides face the machine and use the steps and track shoes on the machine 21 Stop the engine sign 22...

Page 27: ...and ramp Ensure adequate ventilation during indoor operation What you are unclear about will hurt you 13 Understand the precise distances between wires telephone lines and machines and distances betw...

Page 28: ...the seat to operate the machine 4 It is not allowed to start the engine by short circuiting the starter motor 5 The machine must be preheated in cold weather Warning When a warning sign prohibiting e...

Page 29: ...or rotated a signal commander shall be arranged 5 Close and lock the cab door before walking The cab windows flip windows and sunroof are allowed to be opened but they must be locked Safety rules when...

Page 30: ...heir permission before driving on the highway 3 Walking or working on a slope Excavator walking and working on slopes are extremely dangerous so be careful 1 It is recommended not to go up and down on...

Page 31: ...when going uphill or downhill otherwise the machine will tip over 9 When stopping on a slope the front bulldozer shovel must be inserted into the soil and the bucket must be lowered and inserted into...

Page 32: ...walk on rocks or cross obstacles 13 No direction change is allowed on slopes 14 When going uphill make sure that the engine and hydraulic oil have been properly preheated otherwise it will cause an ac...

Page 33: ...is a correct guide to ensure your personal safety 11 Irrelevant people in the excavation site should be cleared out before work 2 Confirm that the worksite can fully support the machine before drivin...

Page 34: ...his from happening a small margin should always be kept when operating the hydraulic cylinder 8 When digging deeply avoid the bottom of the boom or the hose of the bucket cylinder from touching the gr...

Page 35: ...e digging force of the machine 15 Do not use the falling force of the bucket as a pick breaker or pile driver as this will cause excessive force on the rear of the machine This will not only damage th...

Page 36: ...not use turning force to compact the soil or damage mounds and walls When turning do not insert the bucket teeth into the soil as these actions will damage the working device 19 Do not dig the bucket...

Page 37: ...round with two tracks high on one side and low on the other or more than half of one track is suspended in the air 2 When one track contacts loose soil and the other track contacts solid soil 3 When t...

Page 38: ...ange of the excavator In addition to using the hoisting method or driving directly from the wharf the excavator can also drive on the transport vehicle by using two approach slabs with sufficient stre...

Page 39: ...current Before servicing the machine if you need to support the machine or accessories to work support the machine or accessories firmly and do not work with only one jack supporting the machine After...

Page 40: ...d or stuck to the engine exhaust pipe muffler and engine compartment in time Do not place oil soaked rags in the machine to avoid spontaneous fire and burning The user should configure a fire extingui...

Page 41: ...attery or jump start the engine Do not heat the frozen battery over 15 otherwise the battery may explode Anti explosion of battery Warning Electric sparks or flames will cause the hydrogen in the batt...

Page 42: ...re hose leaks oil or fuel it may cause a fire or operation failure resulting in serious injury or damage If the bolts are found to be loose stop the work and tighten the bolts to the specified torque...

Page 43: ...ator from being close to the fire source and avoid collision and impact on the accumulator Professional personnel shall be invited to dispose the accumulator The machine is equipped with accumulators...

Page 44: ...3 1 Parts introduction...

Page 45: ...xiliary pedal 3 Left walking joystick 4 Right walking joystick 5 Right auxiliary pedal 6 Instrument 7 Right pilot joystick 8 Manual throttle 9 Bulldozing pilot handle 10 Left pilot handle 11 Seat 12 H...

Page 46: ...t lock and unlock Pull the pilot safety lock handle lever to the end position and lift the left control box to start the ignition The general control of the pilot system does not supply oil and the ma...

Page 47: ...ign side and OFF on the opposite side 6 Warning light switch Press the rocker switch it is ON on the sign side and OFF on the opposite side 7 Fast walk switch Press the rocker switch and the walking m...

Page 48: ...tarting position to the start position and the engine start motor begins to run Preheating position turn the key to the preheating position and the engine begins to preheat the intake air the preheati...

Page 49: ...3 6 Panel meter Oil level pointer Timing display Water temperature pointer Indicator area...

Page 50: ...e left B Right pilot valve handle Boom control lower the boom when pushing forward and lift when pulling back Bucket control the bucket turns outwards when swinging to the right and turning inwards wh...

Page 51: ...working devices the auxiliary oil source can be connected by stepping on the foot pedal of the auxiliary working device Walking manipulation Direction control Operate the left and right walking joyst...

Page 52: ...throttle handle forward to increase the throttle Before stopping the engine pull the throttle handle back to the end 2 Shutdown handle Before stopping the engine pull the shutdown handle back to the...

Page 53: ...elt and adjust the seat before starting the machine Seat front and rear adjustment pull the seat front and rear adjustment handles to allow the forward and backward movement Loosen the handle and the...

Page 54: ...abnormality in the seat belt you must replace the seat belt every 3 years The production date of the seat belt is displayed on the manufacture date label of the seat belt During operation be sure to w...

Page 55: ...4 1 Operation guide...

Page 56: ...nd the engine radiator and battery 7 Check the hydraulic device fuel tank hose and joints for oil leakage you can check whether there are obvious oil traces on the parking floor 8 Check all parts of t...

Page 57: ...ks excessive wear or play in the working devices cylinders connecting rods and hydraulic hoses If an abnormality is found it must be replaced and repaired 5 Check the hydraulic device hydraulic oil ta...

Page 58: ...ion instrument If there is an alarm please perform related troubleshooting first before starting the engine A Start the engine at normal temperature Turn the key clockwise to the ON position when the...

Page 59: ...on the operator s seat and the other operating the battery 2 When starting with another machine do not let the two machines touch 3 When connecting the auxiliary cable turn the key switches of the no...

Page 60: ...n the sound vibration heating smell and instrument of the machine If any abnormality is found repair it immediately 4 Turn off the engine Note If the engine is suddenly turned off before it cools down...

Page 61: ...up 5 Don t jump on or off the machine and don t go up and down the machine when the machine is in motion 6 The working device must be completely lowered to the ground and the engine must be shut down...

Page 62: ...allowed to drive on the machine and no others are allowed 8 Before operating the steering joystick check the direction of the crawler frame 9 If the bulldozer shovel is behind the operation of the wa...

Page 63: ...When the machine is at a low temperature if the walking speed of the machine is not normal the machine must be warmed up thoroughly In addition if the lower car body is blocked by mud and the machine...

Page 64: ...before turning 1 Turn when the machine stops When turning left When walking forward push the right walking joystick forward and the machine will turn left When walking backward pull the right walking...

Page 65: ...owly Pay attention to the operating speed of the pilot valve handle 1 Before starting the rotation the platform lock pin has been lifted and the platform and chassis have been unlocked 2 Disconnect th...

Page 66: ...d within 15 seconds after turning off the engine the working device can also be dropped to the ground In addition you can also operate the pilot valve to release the remaining pressure in the hydrauli...

Page 67: ...to the right Make sure that the machine is in the boom deflection mode before the boom deflection 6 Operation of the bulldozer shovel Push the bulldozing lever down and the bulldozer shovel cuts down...

Page 68: ...or operating working devices will cause the machine to lose balance and tip over so avoid this kind of operation When the bucket is loaded it is very dangerous to turn downhill If this operation is ne...

Page 69: ...een the boom and the stick should be 90 degrees to 110 degrees When only one track is stuck in the mud use a bucket to lift the track and then pad wooden boards or logs to drive the machine out If nec...

Page 70: ...ngle toward the machine There may be some differences depending on the digging depth but try to operate within the above range instead of operating the cylinder to the end of its stroke Note It is bes...

Page 71: ...then leave 4 Backfilling or leveling In order to fill the ditch the direction of excavator travel is perpendicular to the ditch After cutting the bulldozing board into the soil to a certain depth loos...

Page 72: ...re on the right 2 The bulldozer shovel can t bear huge or unstable weight otherwise it will damage the bulldozer shovel or crawler system 3 When walking the bulldozer shovel should not hook any object...

Page 73: ...und When making connections for safety s sake clarify the signals with each other and work carefully Put the excavator in working condition manipulate the stick while facing the bucket until the holes...

Page 74: ...cks the working device or machine will suddenly move causing serious personal injury or accident Therefore before you stand up from the seat you must lift the left control box to keep the machine lock...

Page 75: ...4 21 6 Reset the parking handle after the engine stops 7 Lock the platform 8 Pull up the left control box by using the pilot valve safety handle so that the machine is locked...

Page 76: ...ture oil pressure fuel level etc on the machine s digital monitor 2 Lock The following parts must be locked 1 Fuel tank filler port 2 Engine hood Note When opening the engine hood no one can stand beh...

Page 77: ...n the ramp otherwise the machine may tip over If you must turn you should drive off the ramp correct the direction and then enter the ramp 8 Do not use working devices for loading and unloading operat...

Page 78: ...other joysticks or pedals 6 Stop driving and extend the stick position B in the figure so that the front part of the excavator track is tilted down to the bottom plate of the transport vehicle Be car...

Page 79: ...om the start switch 3 Lock the platform 4 Lock the cab and engine hood 5 Put cushion blocks under the two ends of the tracks to prevent the machine from moving during transportation and tie the machin...

Page 80: ...tick is extended to make the excavator track tilt down onto the ramp and then slowly advance to the ground 5 Hoisting the machine A Safety precautions 1 Do not hoist the machine when there are people...

Page 81: ...le of the boom the lifting hole is marked with a lifting hook sign by using a hook and then use a wire rope to pass between the drive wheel and the first thrust wheel 5 Select the lifting position of...

Page 82: ...ears the inspection period can be extended If there is moisture check the fuel tank 4 Cooling system Before operating the machine in a cold climate check the coolant and adjust the appropriate mixing...

Page 83: ...6 Check the antifreeze performance of the coolant and use the method of adding antifreeze to make its antifreeze power at least 20 If the coolant does not contain an anti corrosion agent due to the w...

Page 84: ...face of the piston rod of the cylinder 2 Fill all parts with engine oil and grease 3 When the machine is stored for a long time the moisture in the atmosphere will enter the oil Before or after starti...

Page 85: ...el system Discharge air and clean oil circuit Oil filter is blocked nozzle is dirty or faulty Go to the local repair point for repairs Damaged high pressure oil pipe Replace the high pressure oil pipe...

Page 86: ...Use the correct fuel Excessive engine oil Restore the recommended oil level Incorrect injection timing Adjust according to the specified value There is water in the cylinder and in the fuel Check and...

Page 87: ...n the system Refill the fuel Safety valve failure Consult the company s agent 15 All parts can t work The hydraulic pump is damaged Consult the company s agent A The oil pump makes noise Lack of hydra...

Page 88: ...oise of the clutch Insert the connector tightly or repair it accordingly Belt loose Tighten appropriately replace if damaged Blower blades are loose Reassemble tightly The blower is not working proper...

Page 89: ...5 1 Maintenance...

Page 90: ...w the below steps Clean the radiator core frequently to avoid clogging Frequently clean and replace the fuel filter element Clean the electrical components especially the starter motor and alternator...

Page 91: ...d after the inspection check the tools and parts you carried to make sure that nothing has fallen into the machine Regular inspection and maintenance Regular inspection and maintenance shall be carrie...

Page 92: ...ify at low temperatures especially below 15 C 5 F Therefore it shall be replaced with the fuel applicable to the ambient temperature In order to prevent moisture in the air from condensing and forming...

Page 93: ...tenance of the hydraulic system includes checking the hydraulic oil level replacing the filter element and filling hydraulic oil During removing the high pressure hose check whether the O ring is dama...

Page 94: ...part illustration book Item Part number Part name Quantity Model Rubber O ring 2 15x2 65 GB T3452 1 Rubber O ring 2 18x3 55 GB T3452 1 Rubber O ring 1 22 4x2 65 GB T3452 1 Rubber O ring 4 6 5x1 5 IS0...

Page 95: ...affecting their normal functions and becoming safe potential hazards at the same time These problems are not easy to check Therefore these parts shall be replaced compulsorily after the specified tim...

Page 96: ...e enterprise standard of Yuchai Heavy Industry Lubricating oil for the walking reducer Gear oil GL 5 for heavy duty vehicles Universal in winter and summer SAE80W 90 Lubricating oil for the rotary red...

Page 97: ...l diameter mm 6 8 10 12 14 16 18 20 Tightening torque Nm 8 8 640 9 12 22 30 45 59 78 104 124 165 193 257 264 354 376 502 10 9 900 13 16 30 36 65 78 110 130 180 210 280 330 380 450 540 650 12 9 1080 16...

Page 98: ...e N m Nominal moment min max M12X1 5 6 20 15 25 M14X1 5 8 38 30 45 M16X1 5 8 10 45 38 52 M18X1 5 10 12 51 43 85 M20X1 5 12 58 50 65 M22X1 5 14 15 74 60 88 M24X1 5 16 74 60 88 M26X1 5 18 105 85 25 M30x...

Page 99: ...2 60 42 76 G5 8 69 44 94 G3 4 115 95 135 G1 140 115 165 G1 1 4 210 140 280 G1 1 2 290 215 365 G2 400 300 500 ORFS rotary nut N m UNF thread Marking line specifications min max 9 16 18 4 14 16 11 16 16...

Page 100: ...er or fuel Appearance of mechanical parts and hoses Fixing situation of bolts and hydraulic joints Work condition for the working components working lights and indicators Work condition for the diesel...

Page 101: ...eplace the hydraulic oil return and pilot oil line filter element Check system pressure 7 Battery Check the electrolyte level Check acidity and charging status 8 Reducer Check the oil level and refuel...

Page 102: ...re scratches breaks or deformations on the elastic connectors and accessories 3 Check the fixing and connection of the hydraulic device 4 Check the appearance of mechanical parts 5 Check the working c...

Page 103: ...tank The condensate and sediment shall be removed every 100 hours Loosen the fuel drain plug to allow the condensate and sediment to flow out Once the fuel flows out reinstall the fuel drain plug Acco...

Page 104: ...asons so the following inspections should be carried out first A The air inlet and exhaust valves are not well sealed B The fuel injection nozzle is not adjusted correctly C The fuel filter is dirty o...

Page 105: ...fuel and lubricate the O ring with clean engine oil 6 Install the fuel filter as specified by the filter manufacturer 7 After replacing the filter element start the engine and check the sealing surfac...

Page 106: ...be between the highest and lowest water levels of balance tank Observe the position of the coolant level in the balance tank If the engine is cold the coolant level shall be between the highest and l...

Page 107: ...eater than 500 mm A damaged radiator fins may cause water leakage or overheating In dusty sites check the radiator fins every day regardless of the maintenance cycle 4 Change the coolant Perform the f...

Page 108: ...sposed in accordance with local environmental regulations Warning Antifreeze shall be used in any climate Don t just use water as a coolant Otherwise the machine may be damaged due to corrosion The ri...

Page 109: ...d maximum H marks 3 If necessary you can fill oil from the oil port to make the oil level reach the specified value Warning After the engine is turned off the parts and oil are still at high temperatu...

Page 110: ...ped Add oil if necessary 3 Replace the engine oil filter element It shall be cleaned after 50 hours of the working of new machine and it will be cleaned and replaced every 250 hours thereafter Replace...

Page 111: ...ore performing these operations There is a danger of dirt flying out and causing injury when using the compressed air Wear protective glasses dust mask or other protective devices 2 Clean the air filt...

Page 112: ...d for 500 hours 1 Follow the same procedure as described in the cleaning instructions 2 Inspect the quality of the new filter element with the light irradiation method 3 Install a new filter element 4...

Page 113: ...eak or fly out Warning If the noise of the machine is too loud it will cause temporary or permanent hearing problems During performing engine maintenance and prolonged exposure to noise wear earmuffs...

Page 114: ...ck cylinder extend the bucket cylinder and then the bucket falls to the ground the bulldozer shovel shall be placed on the ground and shut down As the figure shows 4 Observe the hydraulic oil level th...

Page 115: ...d before daily work 2 During removing the oil filler flange cover in order to prevent the oil from spraying out slowly turn the cover to release the internal pressure 3 During replacing the oil be car...

Page 116: ...n the exhaust port and check whether there is oil flowing out The exhaust is completed 2 Tighten the screw plug after the exhaust is completed Note If the pump is operated if the pump is not full of o...

Page 117: ...the screw plug 2 Run the engine at idling speed and rotate the working device in 90 degree so that it is located on the side of the track As shown on the right 3 Jack up the machine with the working...

Page 118: ...hall be done every 1000 hours Note Be sure to discharge the air pressure in the hydraulic oil tank before removing the filter element 1 Unscrew oil filter housing 2 Remove the filter element 3 Install...

Page 119: ...mp and other hydraulic components The recommended replacement cycle is as follows unit hour Hydraulic hammer operating rate Hydraulic oil changing cycle Filter element replacement cycle 50 500 500 100...

Page 120: ...he battery Hydrogen and oxygen are produced by electrolyzing water in the later stage of battery charging which causes water loss The higher the charging voltage the more water loss This series of bat...

Page 121: ...ery cover is equipped with an indicator to display the battery charge state When the indicator displays in green the battery can be used normally The battery shall be charged in time when the indicato...

Page 122: ...educer 1 Check the lubricating oil level of the walking reducer and fill oil Warning The oil in the reducer will heat up shortly after the machine moves After turning off the engine the walking reduce...

Page 123: ...crew plug to drain oil completely 5 Loosen the bolt 6 Add the specified lubricating oil from the oil filling hole until oil flows out from the oil level inspection hole 3 Check the tightening torque o...

Page 124: ...ctly tension the track so that there is a 10 15 mm deflection between the middle thrust wheel and the track as b in Figure 1 5 Remove the cover a in Fig 2 on each track frame and expose the fuel nozzl...

Page 125: ...ing torque of bolt shall be 110N m If the bolts loose unscrew the bolts remove the thread locking agent between the bolt threads and then apply the thread locking agent to the threaded joints and tigh...

Page 126: ...of bucket cylinder 7 Hinge point between rocker and stick 8 Lubrication point at the stick cylinder head 9 Lubrication point at the tail of stick cylinder 10 Lubrication point at the boom cylinder hea...

Page 127: ...lubricate the pin immersed in water before and after the operation 4 When carrying out heavy load operation or deep excavation lubricate the mounting pins of the working device before each operation a...

Page 128: ...place the bucket teeth 1 Place the bottom of the bucket on blocks for removal Check that the working device is in a stable state and the bucket is placed horizontally Shut down the engine 2 Loosen the...

Page 129: ...re to stop the machine on a solid and flat ground before removing the floor rubber mat The operator must lift the pilot safety handle and its upper control box to lock the pilot system before standing...

Page 130: ...6 1 Accessories guide...

Page 131: ...turned to the side After installing the accessories the rotation range and the center of gravity of the machine are different and the machine may move unexpectedly Be sure to properly check the condit...

Page 132: ...rap the unconnected ends of the two rubber tubes of the hydraulic hammer with a clean plastic bag and dust proof measures shall be taken Keep well the accessories 2 Assembly steps 1 Remove the bucket...

Page 133: ...surface of the broken object and keep it as long as possible If it is inclined to the surface of the broken object the drill rod may slip off the surface which may damage the drill rod and affect the...

Page 134: ...ts to loosen and damage and even damage the excavator itself Aimless impacting comes from improper insertion and shaking during use of the breaking hammer 2 Operation taboos for hydraulic breaker hamm...

Page 135: ...6 6 3 The drill rod is moved during impact operation 4 Apply impact force horizontally or upward 5 Swing the breaker hammer after it has penetrated the rock 6 Pecking operation...

Page 136: ...6 7 7 Carry out crushing operations in water or muddy ground 8 Use the breaker hammer as a tool for lifting heavy objects 9 The bucket cylinder is fully extended to lift the machine off the ground...

Page 137: ...tter to use 10ml time lubricating oil for lubrication before operation and after each continuous operation for 2 to 3 hours Lubricating oil shall be filled at 5 10 times for each lubrication Fill the...

Page 138: ...6 9 Quick coupler 2 Pry up with a crowbar 2 Put the bucket pin into put down the crowbar and the bucket is installed 2 Unloading the bucket 1 Pry up with a crowbar 2 Unload the bucket...

Page 139: ...bucket oil cylinder to the oil inlet of the large chamber of the grab bracket oil cylinder and connect the oil inlet of the small chamber of the original bucket oil cylinder to the oil inlet of the sm...

Page 140: ...he stick when transporting the machine 4 Grab bucket maintenance Lubrication 1 Park the machine on a hard and level ground lower the working device to the ground and then shut down the engine 2 Use a...

Page 141: ...ves connected to the inlet and outlet pipes on the stick side 6 After installing the accessories confirm whether the oil level in the hydraulic oil tank is proper 2 Operation of drilling device 1 Oper...

Page 142: ...ction of the drilling tool and the direction of the drilling tool body in a straight line 2 If there is not enough depth pull out the drilling tool first and then restart the operation 3 It can only b...

Page 143: ...he backhoe bucket will turn outwards when swinging to the right the scraper of backhoe bucket will push outwards and the backhoe bucket will retract inwards when swinging to the left 3 Maintenance of...

Page 144: ...Guangxi Yuchai Heavy Industry Co Ltd SJ008 U27 AF51 2022 Publication Date March 2022 Address No 168 Tianqiao Road Yulin City Guangxi China 537005 Phone 95105432...

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Yuchai U27, Instruction Manual

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