Komatsu PW170ES6K Hydraulic Excavator Complete Workshop Service Repair Manual

Shop Manual UEBM000500 HYDRAULIC EXCAVATOR SERIAL NUMBERS PIN1 70ES-6 -K30001 and up This material is proprietary to Komatsu America International Company and is not to be reproduced, used, or disclosed except in accordance with written authorization from Komatsu America International Company. It is our policy to improve our products whenever it is possible and practical to do so. We reserve the right to make changes or add improvements at any time without incurring any obligation to install such changes on products sold previously. Due to this continuous program of research and development, periodic revisions may be made to this publication. It is recommended that customers contact their distributor for information on the latest revision. July 1999 Copyright 1999 Komatsu America International Company

10 STRUCTURE AND FUNCTION Engine related parts ..................................... 1O-2 Radiator, oil cooler, aftercooler.. ................... 1O-3 Power train ................................................... 1O-4 Swing circle .................................................. 1O-5 Swing machinery.. ........................................ 1O-6 Undercarriage .............................................. 1O-8 Transmission ................................................ 1O-9 Axle 1O-l 0 Suspension Lock Cylinder.. .......................... 1O-l 4 Braking train ................................................. 1O-l 6 Break pedal .................................................. 1O-l 7 Break valve.. ................................................. 1O-l 8 Accumulator For Brake System .................... 1O-l 9 Steering train ................................................ 1O-20 Steering column ........................................... 1O-22 Hydraulic circuit diagram .............................. lo-23 Hydraulic tank .............................................. 1O-24 Hydraulic pump ............................................ 1O-25 Control valve ................................................ 1O-32 CLSS ............................................................ 1O-38 Swing motor ................................................. 1O-73 Center swivel joint ........................................ 1O-75 Travel motor (Front, Rear) ............................ 1O-76 W ork equipment, swing PPC valve 1 O-78 Travel PPC valve .......................................... 1O-82 Service PPC valve ....................................... 1O-83 Safety lock valve.. ......................................... 1O-86 PPC accumulator ......................................... 1O-86 PPC shuttle, travel joint valve ....................... 1O-87 EPC, solenoid valve ..................................... 1O-91 Additional filter for breaker ........................... 1O-l 00 Boom holding valve ...................................... 1O-l 01 Hydraulic cylinder ......................................... 1O-l 07 W ork equipment ........................................... 1O-l 1 1 Electrical wiring diagram .............................. 1O-l 12A .............................................................. IO-1 12B .............................................................. IO-1 12c Engine control system .................................. 1O-l 13 Electronic control system ............................. 1O-l 19 Machine monitor system .............................. 1O-l 45 10-I

STRUCTURE AND FUNCTION ENGINE RELATED PARTS ENGINE RELATED PARTS 6 7 10 i4 8 9 D-D A-A B-B c-c H-H 1. Drive plate 2. Torsion spring 3. Stopper pin 4. Friction plate 5. Damper assembly 6. Air cleaner 7. Intake connector 8. Muffler 9. Rear engine mount IO. Front engine mount OUTLINE . The damper assembly is a dry type. 1 o-2

STRUCTURE AND FUNCTION RADIATOR. COOLER. AFTERCOOLER RADIATOR l OIL COOLER 8 1. Reservoir tank 2. Oil cooler 3. Radiator 4. Fan 5. Radiator inlet hose 6. Radiator outlet hose 7. Radiator cap 8. Net 9. Shroud 6 / SPECIFICATIONS Radiator: CWX-4 Oil cooler: SF-3 1 o-3

STRUCTURE AND FUNCTION POWER TRAIN 1 2 3 4 5 6 1. Front axle 11. Swing machinery 2. Center swivel joint 12. Swing circle 3. Swing motor 13. Transmission 4. Control valve 14. Rear axle 5. Swing brake solenoid valve 15. Gear pump 6. Travel speed solenoid valve 16. Priority valve 7. Travel motor 17. Power brake valve 8. Propshaft 18. Pressure reducing valve 9. Hydraulic pump 19. Clutch control valve IO. Engine 20. Clutch IO-4

STRUCTURE AND FUNCTION SWING CIRCLE SWING CIRCLE 1. Swing circle inner race (No. of teeth: 94) 2. Ball 3. Swing circle outer race a. Inner race soft zone S position b. Outer race soft zone S position SPECIFICATIONS reduction ratio: g = 7,833 amount of grease: 8/(G2-LI) 1 o-5

STRUCTURE AND FUNCTION SWING MACHINERY SWING MACHINERY 23. 1. 2. 3. 4. 5. 6. 7. 8. 9. IO. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. Swing pinion (No. of teeth: 12) Cover Case No. 2 of planetary carrier No. 2 sun gear (No. of teeth: 24) No. 2 ring gear (No. of teeth: 78) Case No. 1 ring gear (No. of teeth: 78) No. 1 sun gear (No. of teeth: 18) Retainer Oil level gauge Cover No. 1 planetary gear (No. of teeth: 29) No. 1 planetary carrier Coupling No. 2 planetary gear (No. of teeth: 26) Drain plug Breather Parking brake piston Parking brake spring Parking brake disc Parking brake plate Gauge rod SPECIFICATIONS reduction ratio: 24+78 24 x 7 = 22.667 1 O-6

STRUCTURE AND FUNCTION SWING MACHINERY SWING HOLDING BRAKE OPERATION 1) When swing brake solenoid valve is deactivated From brake valve return When the swing brake solenoid is deactivated, the pressurized oil from the PPC pressure reducing valve is shut off and port B is connected to the tank circuit. Because of this, brake piston (2) is pushed down in the direction of the arrow by brake spring (I), so disc (3) and plate (4) are pushed together and the brake is applied. 2) When swing brake solenoid valve is excited From brake valve return When the swing solenoid valve is excited, the valve is switched, and the pressurized oil from the PPC pressure reducing valve enters port B and flows to brake chamber “a”. The pressurized oil entering chamber “a” over- comes the force of brake spring (I), and brake piston (2) is pushed up in the direction of the arrow. Because of this, disc (3) and plate (4) separate, and the brake is released. 1. Brake spring 2. Brake piston 3. Disc 4. Plate 1o-7

STRUCTURE AND FUNCTION UNDERCARRIAGE UNDERCARRIAGE KW13OP6002 KW13OP6003 1. Undercarriage 2. Step 3. Wheel chock 4. Front oscillating steering axle 5. Rear axle 6. Propshaft 7. Travel motor 8. Transmission 9. Double wheel ass’y 10. Single wheel ass’y 1O-8

STRUCTURE AND FUNCTION TRANSMISSION TRANSMISSION CLUTCH ASS’Y 1. Screw-fork to shaft 7. Gear 1. Casing 2. Flange 8. Cover 2. Drive shaft 3. Brake cylinder 9. Output shaft 3. Friction plates 4. Brake drum 10. Bearing 4. Spring discs 5. Friction disk 11. Gear 5. Gear 6. Flange 12. Clutch ass’y 6. Clutch control gear pump 2 9 7. Plug 8. Plug 1 o-9

Komatsu PW170ES6K Hydraulic Excavator Complete Workshop Service Repair Manual

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