Hanchi Auto Parts
4090031PX Water Pump Suitable for Komatsu 12V140 QST30 High Quality
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If your parts book shows 4090031PX, you need a water pump for 12V140 and QST30 engines. Ours is a matching replacement — same mounting holes, same belt pulley height, pressure-tested before packing. Related OE numbers include 3800322, 4096427, 6219-61-1150.
Which engines use the 4090031PX water pump?
Fitment covers 12V140; QST30.
If your engine tag matches any entry above, this pump is the right replacement.
What are the specifications of 4090031PX?
| Parameter | Value |
| OE number | 4090031PX |
| Fits brand | Komatsu;Cummins |
| TO Shaft head height | 76.5 |
| Mounting hole position | Aligned to OE mounting points |
| TO Gear height | 74.5 |
| TO Impeller height Ⅰ | 11.2 |
| Air tightness testing | No leakage detected under negative pressure of 0.1 MPa |
| Appearance Ⅰ | Neutral finish, no third-party logos |
| Appearance Ⅱ | Clean surface: no dirt, rust or paint peeling |
| Assembly rotation | Turns freely by hand, no sticking or noise |
| Number of Teeth | 25 |
| Included Component 1 | O98X3.5 |
| Net weight of one | 31.40 |
| Units per Carton | 1 |
| Net weight | 31.40 kg |
| Packing | 1 pcs/ctn, 34.00 kg gross |
What part numbers interchange with 4090031PX?
One pump, many part numbers. The full cross list:
- 3800322
- 4096427
- 6219-61-1150
Packing and quality checks
For shipping estimates, count on 1 pumps per carton (34.00 kg, 43 x 40 x 33 cm).
Before boxing, each pump passes a negative-pressure leak check and a hand-rotation check for smooth, noise-free bearing movement.
Frequently asked questions
What vehicles or engines does 4090031PX fit?
4090031PX fits 12V140 and QST30 engines. It is a Komatsu;Cummins application water pump, and our aftermarket unit replaces it directly.
What other part numbers replace 4090031PX?
4090031PX interchanges with 3800322, 4096427, 6219-61-1150. All of these refer to the same water pump assembly.
Is 4090031PX available from stock?
Yes, this number is in regular production. Lead time for carton quantities is usually a few days; ask us for current stock before ordering.
How much does the 4090031PX water pump weigh?
One pump weighs 31.40 kg net. A full carton of 1 pieces comes to 34.00 kg gross.
How do I confirm 4090031PX is the pump I need?
Check the OE number stamped on your old pump or in the parts book, then compare engine model and pulley height with the spec table on this page. If anything is unclear, send us a photo of the old unit.
Bulk pricing starts at one carton. Ask for a quote with your target quantity.
Send the OE number, your quantity and your destination port — feel free to Contact Us. We reply with fitment confirmation and a quote.
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