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Shop manual máy xúc lất HuynDai HL760 (Phần cơ cấu công tác) - Sơ đồ thủy lực - Kết cấu - Kiểm tra và hiệu chỉnh
6-681. MAIN PUMP1. MAIN PUMPSTEERING STEERING (1/2)1)1)GROUP 4 DISASSEMBLY AND ASSEMBLYGROUP 4 DISASSEMBLY AND ASSEMBLY 1 Rotary group 1-1 High speed rotary group 1-2 Control plate 2 Adjusting piece 5 Pump housing 6 Port plate 7 Swash plate 8 Drive shaft 10 Splined hub 12 Adjustment shim 15 Taper roller bearing 16 Taper roller bearing 17 Bearing liner 20 Shaft seal ring 22 O-ring 23 O-ring 24 O-ring 25 Retaining ring 27 Socket screw 30 Locking screw 31 Double break-off pin 33 Cylinder pin 37 Side mark ring 51 Control valve 52 Gasket 53 Socket head screw 54 Locking screw2327524106,311612335251815202522301771-11-2254533776096WE11 6-69LOADER LOADER (2/2)2327526,3116123324442815202522301774111281-21-14376096WE12 1 Rotary group 1-1 High speed rotary group 1-2 Control plate 2 Adjusting piece 5 Pump housing 6 Port plate 7 Swash plate 8 Drive shaft 11 Adjustment shim 12 Adjustment shim 15 Taper roller bearing 16 Taper roller bearing 17 Bearing liner 18 Shaft seal ring 22 O-ring 23 O-ring 25 Retaining ring 27 Socket screw 28 Locking screw 30 Locking screw 31 Double break-off pin 33 Cylinder pin 41 Control valve 42 Gasket 43 Socket screw 44 Locking screw 6-70GENERAL REPAIR GUIDELINESGENERAL REPAIR GUIDELINESObserve the following guidelines when carrying out repairs on hydraulic pumps.Close off all openings of the hydraulic unit.Replace all of the seals.Use only original spare parts.Check all sealing and sliding surfaces for wear.Re-work of the sliding surfaces by using, for example abrasive paper, can damage the surface.Fill the hydraulic pump with hydraulic oil before commissioning.Change the shaft seal and check its sliding surface (drive shaft) and housing, grease the sealing ring.(2)2)2)※(1)(2)(3)※(4)2175796WE60Assemble the sealing ring, fitting tool holds the correct position of the sealing ring in the pump housing.Assemble the circlip in the correct position.(3)75796WE58SEALING THE DRIVE SHAFTSEALING THE DRIVE SHAFTProtect the drive shaft.Remove the circlip.Remove the shaft seal.1 Circlip 2 Shaft seal3)3)(1)75796WE59 6-71AA175796WE62SEALINGSEALING / CLEANING THE CONTROL CLEANING THE CONTROL VALVEVALVEDisassemble the control valve. Measure dimension A and note down.Check sealing surface (1).4)4)(1)※ Mark the location of the connection plate on the housing.(2)75796WE6475796WE63DISASSEMBLE THE PUMPDISASSEMBLE THE PUMPRemove the control valve.5)5)(1) 6-72Remove the connection plate fixing bolts and the connection plate.Distributor plate and adjustment piston can drop down.(3)※75796WE65Remove distributor plate.Take note of the orientation.Remove bearing with withdrawal tool.Do not damage the sealing surface.(4)※75796WE66Remove the rotary group in a horizontal position.(5)75796WE67 6-73Remove swash plate and bearing shells.(6)75796WE68Remove the circlip and the shaft seal.(7)75796WE69Remove the drive shaft through rear side.(8)75796WE70Pre-tension the spring (1) using a suitable device.Remove circlip (2).Remove spring (1) and pressure pins (3).(9)12375796WE72 6-74Use bearing puller to remove outer bearing race of front bearing out of housing press seat.(10)75796WE74Remove the control plate.(11)75796WE75Use bearing puller to remove outer bearing race of rear bearing - press seat.(12)75796WE76Disassemble the guide of control piston (Mounting position: pilot valve side).(13)75796WE77 6-75Disassemble the guide of the opposite piston.(14)75796WE7875796WE79INSPECT HINTSINSPECT HINTSRenew all bearings.6)6)(1)12345675796WE80Check : 1 Wear on splines, rust2 Drive shaft seal wear grooves3 Bearing seat4 Splines for cylinder drive5 Bearing seat(2)Check :Sliding surface free of grooves.(3)75796WE811 6-76Check :Bearing surfaces.(4)75796WE82Check :Check to see that there are no scratches or metal deposits on the sliding surface (1) and that there is no axial play (2) (Pistons must only be replaced as a set).(6)75796WE83Check :That the retaining plate is free of grooves and that there is no wear in the slipper pad area.(5)12275796WE84Check :1 Cylinder bores 2 Splines(7)1275796WE85 6-77Free of grooves, no signs of wear.(8)75796WE86Check :Cylinder sliding surface free of grooves, no wear, no embedded foreign particles. That there are no scratches on the control plate. (Only replace them as a set).(9)75796WE87Check :Mounting surface - control plate undamaged.(10)75796WE120Check :Check running conditions of the control piston.(11)75796WE89 [...]... VALVE 1) STRUCTURE 2 1 3-1 3-2 Locite 262 3-3 4 5 1 1-1 1 1-2 1 2-1 1 2-2 4,3,1 4 1 10 1 1-3 3 2 30 1 2-3 1 2-4 1 1-4 2 30 33 1 1-5 1 1-6 14 4,3,1 32 40 15 4 1 20 2 0-1 40 42 3 2 22 21 23 1 4 3 25 2 26 7707WE64 1 2 3-1 3-2 3-3 4 5 10 1 1-1 1 1-2 1 1-3 Handle Push button Locking pin Bent lever Nut Rubber boot Locking nut Cardan bracket Self-locking nut Washer Washer 1 1-4 1 1-5 1 1-6 1 2-1 1 2-2 1 2-3 1 2-4 14 15 20 21 Cardan... : - Friction washer (1 1-2 ) - Friction washer (1 1-3 ) - Cardan/armature assembly (1 1-4 ~ 1 1-6 ) W V After removing the cardan bracket 7707WE65 (5) NON-DETENT PLUNGER KIT ① Unscrew the self-locking nut (1 2-1 ) using a 13 mm open-end wrench ·Reassembly : - Torque 1.02 kgf·m (7.4 lbf·ft) - Place centering sleeves (V-W) to avoid damaging the cardan knuckles while screwing the nuts ② Undo the snap ring (1 2-2 )... STRUCTURE (1/2) 61 62 60 36 38 38 37 79 35 50 79 74 33 31 32 33 79 30 86 102 71 84 74 11 79 85 165 76096WE13 11 30 31 32 33 35 36 Housing O-ring O-ring O-ring O-ring O-ring O-ring 37 38 50 60 61 62 71 O-ring O-ring Housing Plate Cylinder screw Washer Shuttle valve 6-8 2 74 79 84 85 86 102 165 Compensator valve Pressure valve Flow regulator Precharge valve Pilot oil supply Locking screw Pressure relief... (2 0-1 ) from the W flange (20) ※ Place centering sleeves V & W to avoid damaging the cardan knuckles while loosening the nuts ※ Unscrew the locking nut (5) using a 23mm open-end wrench ·Assembly : Torque 4.08±0.4 kgf·m (29.5±2.9 lbf·ft) V Before loosening the nuts ① Unscrew the self-locking nut (1 1-1 ) using a 13mm open-end wrench ·Assembly - Torque 1.02 kgf·m (7.4 lbf·ft) - Place centering sleeves (V-W)... nuts ② Undo the snap ring (1 2-2 ) using a flat-end screwdriver ③ Remove the screw assembly (1 2-3 , 1 2-4 ) (6) CARDAN ① Remove the centering sleeves V & W ② Remove the cardan bracket (10) and the shims (14) ③ Unscrew the cardan (15) using a 17 mm open-end wrench ·Reassembly : - Ungrease the cardan threads - Add loctite 262 onto the cardan threads (both end) - Torque 4.08 kgf·m (29.5lbf·ft) (7) SOLENOID... and check them for any burrs or dents Remove burrs and dents with oil-stone, if any (3) O-rings and back-up rings are to be replaced with new ones, as a rule (4) When installing O-rings and back-up rings, be careful not to damage them (Apply a little amount of grease for smoothness) (5) Tighten the bolts and caps with specified torque 6-8 4 5) DISASSEMBLY AND ASSEMBLY (1) Spool ① Loosen the bolt (2EA)... or spline 75796WE93 6-7 8 (3) Fit pressure pins using an assembly aid 75796WE94 (4) Pre-tension the spring using a suitable device 75796WE95 (5) Assemble piston with retaining plate ※ Oil piston and slipper pad 75796WE97 6-7 9 (6) Fit rotary group ※ Hold the piston by using an O-ring Fit O-ring (1) 1 75796WE98 (7) Fit bearing (1) in connection plate Fit cyilindrical pin (2) Fit O-rings (3) 4 pieces Fit... with V-shaped vice clamp ② Remove the pin ( 3-1 ) using a 5mm pin driver ③ Replace the lever ( 3-2 ) onto the new handle (1) and secure it with the pin ( 3-1 ) using a 5mm pin driver ※ Respect the position of the curved lever to ensure that the handle is correctly oriented as indicated by the machine’s technical specifications ④ Replace the nut ( 3-3 ) on the threaded section and replace the boot (4) 6-8 9 (4)... fitting the protection bushes 6-9 0 (8) INTERMEDIARY PLUNGER KIT ① Undo the intermediary plunger guide (23) ② Remove and replace the intermediary plunger kit assembly (22) (9) GUIDE / PLUNGER AND REGULATION UNIT ※ Beware of the plungers that might jump out due to the spring return ① Remove : - Guide/plunger assembly (30) - Regulation unit (32/33) - Return spring (40) - Pre-feeling point kit (42) ② The... nut ( 3-3 ) using a 19 mm open-end wrench ·Assembly : torque 4.08 kgf·m (29.5 lbf·ft) ⑤ Unscrew and remove the handle (1) ·Assembly - Add loctite 262 onto the lever thread - Torque : 4.08 kgf·m (29.5 lbf·ft) ⑥ Replace the faulty rubber boot (4) with a new one ⑦ Replace the handle (1) following the disassembly instructions in reverse order (3) HANDLE ① Clamp the threaded section of the lever ( 3-2 ) in . 1)1)6162603836383735797433313332797986717416579858410230115076096WE13 11 Housing 30 O-ring 31 O-ring 32 O-ring 33 O-ring 35 O-ring 36 O-ring 37 O-ring 38 O-ring 50 Housing 60 Plate 61 Cylinder screw. screw2327524106,31161233525181520252230177 1-1 1-2 254533776096WE11 6-6 9LOADER LOADER (2/2)2327526,311612332444281520252230177411128 1-2 1-1 4376096WE12 1 Rotary group 1-1 High speed rotary group 1-2