| Category |
KOMATSU Spare Parts |
| Name |
Hydraulic Pump |
| Parts No |
705-33-28540 7053328540 |
| Machine Number |
WA350 WA380 |
| Lead time |
1-3 DAYS |
| Quality |
Brand new, OEM quality |
| MOQ |
1 PCS |
| Means of transport |
By sea/air, DHL FEDEX UPS TNT |
| Packing |
As request or standard packing |
- Key functions & working principle
| Working Principle |
1. Mechanical to Hydraulic Energy Conversion: The engine drives the pump’s input shaft, rotating the cylinder block (housing pistons) against a stationary valve plate. |
| 2. Piston Stroke & Fluid Displacement: Pistons reciprocate in the cylinder block as the swashplate angle forces them to move in/out – drawing oil into the pump (suction stroke) and expelling pressurized oil (discharge stroke). |
| 3. Load-Sensing Control: A pressure sensor detects hydraulic system demand; the pump’s control valve adjusts the swashplate angle to increase/decrease displacement (flow rate) – delivering only the flow/pressure needed for the current task (e.g., low flow for slow arm movement, high flow for fast digging). |
| 4. Pressure Regulation: The integrated relief valve opens if system pressure exceeds the peak limit, diverting excess oil back to the reservoir to prevent pump/machine damage. |
| Core Functions |
1. Power Conversion: Transforms engine mechanical power into pressurized hydraulic oil to drive all hydraulic actuators (cylinders, motors) |
| 2. Flow/Pressure Control: Delivers precise flow and pressure to match equipment operation (e.g., fine control for delicate digging, high pressure for heavy lifting) |
| 3. Energy Efficiency: Load-sensing design reduces fuel consumption by matching pump output to demand – critical for long-duration construction tasks |
| 4. System Protection: Integrated relief valve prevents hydraulic system overload and pump damage from pressure spikes |
WHEEL LOADERS WA350 WA380 Komatsu
- More other pump applied to KOMATSU heavey machine
| 421-S95-2110 PUMP ASS'Y |
| HD255, WA200, WA250, WA300, WA320, WA350, WA380, WA400, WA420, WA450, WA450L, WA470, WA500 |
| |
| 423-947-1110 PUMP ASS'Y,MOTOR |
| 538, 542, 545, AIR, BATTERY, D37EX, D37PX, D39EX, D39PX, FRONT, JV100WA, JV100WP, JV130WH, WA100, WA1200, WA150, WA150L, WA150PZ, WA180, WA200, WA200L, WA200PT, WA200PTL, WA200PZ, WA250, WA250L, WA250... |
| |
| 711-50-41120 PUMP |
| WA350, WA380 |
| |
| 705-21-40020 PUMP ASS'Y,(SAL100) |
| WA350, WA380 |
| |
| 705-55-34140 PUMP ASS'Y,(SAL100+50+36+25) |
| WA350 |
| |
| 705-55-34181 PUMP ASS'Y |
| WA350, WA380 |
| |
| 705-11-40240 PUMP ASS'Y,(SAL(3)100A) |
| WA350, WF600T |
| |
| 705-33-31341 PUMP ASS'Y,(SAL36) |
| WA380 |
| |
| 705-55-34180 PUMP ASS'Y |
| WA350, WA380 |
| |
| 705-22-25100 PUMP ASS'Y |
| HM250, HM300 |
| |
| 273-61-13120 PUMP ASS'Y (PV20) |
| JV100A, JV100WA, JV100WP |
| |
| 705-14-34540 Pump Assembly |
| D275A, D275AX, WA400 |
| |
| 705-12-34060 PUMP ASS'Y |
| GD705A |
| |
| DK106060-5450 PUMP ASS'Y |
| S6D140 |
| |
| 20T-60-00400 PUMP ASS'Y |
| PC40, PC50UU |
| |
| 20Y-04-X1141 PUMP GROUP |
| PC200, PC220 |
| |
| 6131-71-1501 PUMP AND TIMER ASS'Y |
| S4D105 |
| |
| 705-56-23010 PUMP ASS'Y |
| LW250L |
| |
| DK106069-8020 PUMP ASS'Y |
| S6D170 |
| |
| 705-57-21010 PUMP ASSEMBLY |
| WA180, WA180PT |
| |
| 705-14-26530 PUMP ASS'Y |
| JV80DW, PC40, WA450, WA470 |
| Pos. |
Part No |
Qty |
Parts name |
Comments |
| |
705-55-34180 |
[1] |
PUMP ASS'Y,(SAL100+50+36+25) Komatsu China |
53 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["7055534140", "7055534181"] |$0. |
|
| |
705-33-28540 |
[1] |
PUMP ASS'Y,(SAL25) Komatsu OEM |
5.971 kg. |
| |
|
|
["SN: 50001-UP"] |$2. |
|
| 1 |
705-19-01521 |
[1] |
BRACKET Komatsu China |
|
| |
|
|
["SN: 50001-UP"] |
|
| 1 |
705-17-01351 |
[2] |
BUSHING,PLANE Komatsu |
0.016 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["7051701350"] |
|
| 2 |
705-17-28010 |
[1] |
CASE,GEAR Komatsu |
0.972 kg. |
| |
|
|
["SN: 50001-UP"] |
|
| 3 |
705-17-01221 |
[1] |
CARRIER ASS'Y Komatsu China |
|
| |
|
|
["SN: 50001-UP"] |
|
| 3 |
705-17-03352 |
[2] |
BUSHING,PLANE Komatsu China |
0.05 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["7051703351"] |
|
| 4 |
705-17-28450 |
[1] |
GEAR,DRIVE Komatsu China |
|
| |
|
|
["SN: 50001-UP"] |
|
| 5 |
705-17-28510 |
[1] |
GEAR,DRIVEN Komatsu China |
|
| |
|
|
["SN: 50001-UP"] |
|
| 6 |
705-17-01610 |
[2] |
PLATE,SIDE Komatsu |
0.16 kg. |
| |
|
|
["SN: 50001-UP"] |
|
| 7 |
705-67-01470 |
[2] |
SEAL,SEAL Komatsu |
0.024 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["7051701470"] |
|
| 8 |
705-67-01440 |
[2] |
RING,BACK-UP Komatsu |
0.004 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["7051701440"] |
|
| 9 |
04020-00820 |
[4] |
PIN,DOWEL Komatsu |
0.056 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["802540092"] |
|
| 10 |
04020-01228 |
[2] |
PIN,DOWEL Komatsu |
0.026 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["21T3016190"] |
|
| 11 |
705-67-01380 |
[2] |
O-RING Komatsu |
0.1 kg. |
| |
|
|
["SN: 50001-UP"] |
|
| 12 |
705-17-02750 |
[4] |
BOLT Komatsu China |
|
| |
|
|
["SN: 50001-UP"] analogs:["890001864", "0125251290", "0125241290", "0125261290", "0125231290"] |
|
| 13 |
01643-51232 |
[4] |
WASHER Komatsu |
0.024 kg. |
| |
|
|
["SN: 50001-UP"] |
|
| 14. |
705-17-03381 |
[1] |
O-RING Komatsu China |
0.05 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["7051703380"] |
|
| 15. |
705-19-03470 |
[4] |
BOLT Komatsu |
0.081 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["0125261445", "7067540360"] |
|
| 16. |
705-17-04980 |
[4] |
WASHER Komatsu |
0.008 kg. |
| |
|
|
["SN: 50001-UP"] |
|
| 17. |
705-17-01880 |
[1] |
PLATE Komatsu |
0.061 kg. |
| |
|
|
["SN: 50001-UP"] |
|
| 18. |
07000-33032 |
[1] |
O-RING Komatsu |
0.002 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["07000E3032"] |
|
| 19. |
01010-51025 |
[4] |
BOLT Komatsu |
0.36 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["0101081025", "0101651025", "801015109"] |
|
| 20. |
01643-51032 |
[4] |
WASHER Komatsu |
0.17 kg. |
| |
|
|
["SN: 50001-UP"] analogs:["R0164351032"] |
|
- We could supply the following spare parts
1 Hydraulic parts: hydraulic pump, main valve, hydraulic cylinder, final drive, travel motor, swing machinery, swing motor etc.
2 Engine parts: engine ass’y, piston, piston ring, cylinder block, cylinder head, crankshaft, turbocharger, fuel injection pump, starting motor and alternator etc.
3 Undercarriage part: Track roller, Carrier roller, Track Link, Track shoe, Sprocket, Idler and Idler cushion etc.
4 Cab parts: operator’s cab, wiring harness, monitor, controller, seat, door etc.
5 Cooling parts: Radiator, air conditioner, compressor, after cooler etc.
6 Other parts: Service kit, swing circle, engine hood, swing joint, fuel tank, filter, boom, arm, bucket etc.
Packing Details :
inner packing : plastic film for wrapping
external packing : wooden
Shipping :
within 3 days after received the payment , by air or by express or by sea on the basis of the
quantity and emergency circumstances.
1. By Couriers: DHL, UPS, FEDEX, TNT are the main courier companies we are cooperated,
2. By Air: Delivery from the Guangzhou air port to customer's destination city air port.
3. By Sea: Delivery from the Huangpu port .
Por favor verifique seu email!
