Hanchi Auto Parts
129100-42004 Water Pump Suitable for Yanmar 4D84-2 4D89-2 High Quality
Couldn't load pickup availability
129100-42004 is a Yanmar water pump OE number. Our replacement matches the same mounting and cooling specs, fits 4D84-2, 4D89-2, 4TNV98 and other listed engines, and ships with a 2.10 kg net weight (4 pcs per carton). Cross numbers: 129001-42002, 129001-42004, 129004-42000.
Which engines use the 129100-42004 water pump?
Fitment covers 4D84-2; 4D89-2; 4TNV98; 4TNV88; 3TNV88.
Any engine on this list takes our replacement as a straight swap.
What part numbers interchange with 129100-42004?
One pump, many part numbers. The full cross list:
- 129001-42002
- 129001-42004
- 129004-42000
What are the specifications of 129100-42004?
| Parameter | Value |
| OE number | 129100-42004 |
| Fits brand | Yanmar |
| TO Shaft head height | 131.3 |
| Mounting hole position | Aligned to OE mounting points |
| Threads on the pump body | 3-M8X1.25 |
| Flange thread | 4-M6X1 |
| TO Flange height | 126.3 |
| Flange jumping | 0.07 |
| TO Impeller height Ⅰ | 0.5 |
| 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 |
| Included Component 1 | O35X2 |
| Net weight | 2.10 kg |
| Packing | 4 pcs/ctn, 11.00 kg gross |
Packing and quality checks
Each pump is packed individually; a master carton holds 4 pieces at 11.00 kg gross.
We leak-test each unit at a negative pressure of 0.1 MPa, then spin it by hand to confirm free rotation.
Frequently asked questions
What vehicles or engines does 129100-42004 fit?
129100-42004 fits 4D84-2, 4D89-2, 4TNV98 and other listed engines. It is a Yanmar application water pump, and our aftermarket unit replaces it directly.
What other part numbers replace 129100-42004?
129100-42004 interchanges with 129001-42002, 129001-42004, 129004-42000. All of these refer to the same water pump assembly.
Is 129100-42004 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 129100-42004 water pump weigh?
One pump weighs 2.10 kg net. A full carton of 4 pieces comes to 11.00 kg gross.
Not sure this is your pump? Send a photo of the old unit and the engine tag; we will match it.
Send the OE number, your quantity and your destination port — feel free to Contact Us. We reply with fitment confirmation and a quote.
OEM Avalible
Our company understands the challenges of bringing some special parts from paper to reality. Therefore, we offer our services to customers that need help.