Máy đào HuynDai R250 - P8.3

Shop manual máy đào HuynDai R250: An toan, cấu trúc, sơ đồ điện, thủy lực,

1. REMOVAL AND INSTALLREMOVAL Lower the work equipment to the groundand stop the engine.Loosen the breather slowly to release thepressure inside the hydraulic tank.Escaping fluid under pressure canpenetrate the skin causing serious injury.Loosen the drain plug under the hydraulictank and drain the oil from the hydraulictank.・ Hydraulic tank quantity : 190ℓRemove bolts(13) and disconnect pipe(1,2).Disconnect pilot line hoses(4, 5, 6, 7, 8, 9,10, 11).Remove bolts(12) and disconnect pumpsuction tube (3).When pump suction tube is disconnected,the oil inside the piping will flow out, socatch it in oil pan.Sling the pump assembly and remove thepump mounting bolts.・ Weight : 120kg(260lb)Pull out the pump assembly from housing.When removing the pump assembly,check that all the hoses have beendisconnected.8-7GROUP 3 PUMP DEVICE131231245678910111)(1)(2)(3)(4)(5)(6)※(7)※13031GE1825078MP0125078MP02 8-8INSTALL Carry out installation in the reverse orderto removalRemove the suction strainer and clean it.Replace the return filter with a new one.Remove breather and clean it.After adding oil to the hydraulic tank to thespecified level.Bleed the air from the hydraulic pump.Remove the air vent plug(2EA)Tighten plug lightlyStart the engine, run at low idling, andcheck oil come out from plug.Tighten plug.Start the engine, run at low idling(3~5minutes) to circulate the oil through thesystem.Confirmed the hydraulic oil level andcheck the hydraulic oil leaks or not.2)(1)(2)(3)(4)(5)(6)①②③④(7)(8) 8-92. MAIN PUMP(1/2)STRUCTURE1)04 Gear pump111 Drive shaft(F)113 Drive shaft(R)114 Spline coupling123 Roller bearing124 Needle bearing127 Bearing spacer141 Cylinder block151 Piston152 Shoe153 Push plate156 Bushing157 Cylinder spring158 Spacer211 Shoe plate212 Swash plate214 Bushing251 Swash plate support261 Seal cover(F)271 Pump casing312 Valve block313 Valve plate(R)314 Valve plate(L)401 Hexagon socket bolt406 Hexagon socket bolt435 Flange socket bolt466 VP plug468 VP plug490 VP plug531 Tilting pin532 Servo piston534 Stopper(L)535 Stopper(S)548 Pin702 O-ring710 O-ring717 O-ring719 O-ring724 O-ring725 O-ring728 O-ring732 O-ring774 Oil seal789 Back up ring792 Back up ring808 Hexagon head nut824 Snap ring885 Pin886 Spring pin901 Eye bolt9[...]... Adjust stem(Q) Pilot spring Stopper Piston(QMC) Sleeve Spool Spring seat Return spring Set spring Block cover O-ring O-ring O-ring O-ring O-ring O-ring 8-2 0 29072RE02 730 732 733 734 735 755 756 763 801 814 836 858 874 875 887 897 898 924 925 O-ring O-ring O-ring O-ring O-ring O-ring O-ring O-ring Nut Snap ring Snap ring Snap ring Spring pin Pin Pin Pin Pin Set screw Adjust screw(QI) 2) TOOLS AND TIGHTENING... thread) Hexagon socket head setscrew 4 M 5 BP-1/16 - M 8 M 6 BP1/ 8 - M10 6 B Hexagon socket head bolt 5 Allen wrench M 8 BP-1/ 4 PO-1/4 M12, M14 - Hexagon head bolt Hexagon nut VP plug (PF thread) 6 M8 M8 - B Adjustable angle wrench Small size, Max 36mm Screw driver Minus type screw driver, Medium size, 2 sets Hammer Plastic hammer, 1 set Pliers For snap ring, TSR-160 Steel bar Steel bar of key material... out with M6 bolt (29 0-7 TIER) REG06 8-2 4 (29 0-7 TIER) REG07 (9) Remove lever(2, 613) Do not draw out pin(875) ※ Work will be promoted by using pincers or so on (29 0-7 TIER) REG08 (10) Draw out pin(874) and remove feedback lever(611) ※ Push out pin(874, 4mm in dia.) from above with slender steel bar so that it may not interfere with lever(1, 612) (29 0-7 TIER) REG09 (29 0-7 TIER) REG10 8-2 5 (11) Remove lever(1,... of rear pump (29 0-7 TIER) MP17 (10) Fit drain port plug(468) This is the end of reassembling procedures 8-1 8 3 REGULATOR 1) STRUCTURE(1/2) 412 875 874 A 755 A 897 KR3G-9C32 858 614 B P2 Pf 612 Pm Pi 615 613 A 611 B B 647 648 723 642 438 801 801 924 724 641 730 643 708 644 645 646 728 SECTION B-B 413 438 438 Port 496 724 725 A Delivery port 3/4" Suction port 2 1/2" Pilot port PF 1/ 4-1 5 Pm 722 port size... attention to orientation of spool Spool Feedback lever (29 0-7 TIER) 8-2 6 8-2 7 (5) Fit feedback lever(611), matching its pin hole with pin hole in spool Then insert pin(874) ※ Insert pin in feedback lever a little to ease operation ※ Take care not to mistake direction of feedback lever Lever 1 side Lever 2 side (adjust plug fulcrum plug side) (29 0-7 TIER) 8-2 7 (6) Put pilot piston(643) into pilot hole of casing... Choose a clean place ※ Spread rubber sheet, cloth, or so on on top of work-bench to prevent parts from being damaged (2) Remove dust, rust, etc from surfaces of regulator with clean oil (3) Remove hexagon socket head screw (412, 413) and remove regulator main body from pump main body ※ Take care not to lose O-ring (29 0-7 TIER) 01 (29 0-7 TIER) 02 (4) Remove hexagon socket head screw (438) and remove cover(C,629)... large play and is free from binding (29 0-7 TIER) REG12 (10) Fit return spring(654) and spring seat (653) into spool hole and attach snap ring (814) (29 0-7 TIER) REG13 8-2 8 (11) Fit set spring(655) to spool hole and put compensating piston(621) and piston case(622) into compensating hole Fit pilot cover(641) and tighten it with hexagonal socket head screws(436, 438) (29 0-7 TIER) REG14 (12) Put spring seat(644),... not fail to coat sliding surfaces with clean hydraulic oil before assembly ⑤ Replace seals such as O-ring with new ones as a rule (2) Put compensating rod(623) compensating hole of casing(601) into (3) Put pin force-fitted in lever(1, 612) into groove of compensating rod and fit lever (1) to pin force-fitted in casing (4) Fit spool(652) and sleeve(651) into hole in spool of casing ※ Confirm that spool... type pump, fit rear cover(263) and seal cover(262) (29 0-7 TIER) MP12 (6) Assemble piston cylinder subassembly 〔Cylinder(141), piston subassembly(151, 152), set plate(153), spherical bush(156), spacer(158) and cylinder spring(157).〕 Fit spline phases of retainer and cylinder Then, insert piston cylinder subassembly into pump casing (29 0-7 TIER) MP13 8-1 7 (8) Fit valve plate(313) to valve block(312), entering... port 3/4" Suction port 2 1/2" Pilot port PF 1/ 4-1 5 Pm 722 port size Pi Pi 735 Port name B 656 Qmax cut port PF 1/ 4-1 5 436 VIEW C 25072RE01 8-1 9 REGULATOR(2/2) 655 734 653 654 836 651 652 601 624 629 630 628 801 641 925 814 898 631 627 732 C 733 732 622 621 623 625 626 887 763 756 SECTION A-A 412 413 436 438 496 601 611 612 613 614 615 621 622 623 624 625 626 627 628 629 630 Hexagon socket screw Hexagon . Spool6 53 Spring seat654 Return spring655 Set spring656 Block cover708 O-ring722 O-ring7 23 O-ring724 O-ring725 O-ring728 O-ring 730 O-ring 732 O-ring 733 O-ring 734 . 1/20.71. 23. 05.810.016.024. 034 .044.00.71.051.7 53. 55. 03. 010.015.019.027.028.05.18.721.742.072 .31 15.71 73. 6245. 931 8 .35 .17.5912.6625 .33 6.221.772 .31 08.5 137 .4195 .32 02.50.160.200.240 .31 0 .39 0.470.550.550.670.160.200.240 .31 0 .39 0.240 .39 0.550.670.670.674568101214141745681061014171717Bolt