No Products in the Cart
Mitsubishi MD787131 is the engine coolant pump: cast iron body, bearing and shaft, mechanical seal and impeller, with flange hub. It is used on Mitsubishi 6D14 engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Water Pump |
| Replaces | Mitsubishi MD787131 |
| Fits | Mitsubishi 6D14, 6D14T, 6D15 and 6D16 engines, including the Kato HD550, HD770 and HD880 excavators |
| Condition | New, aftermarket |
| Stat. HS-Code | 841330 |
| Country of Manufacture | China |
Mitsubishi machines
Check the part number on your old unit before ordering.
| Mitsubishi Part No.(SPM Part No.) | Fits |
|---|---|
| MD787131(SPM-HEP-4465) | Mitsubishi 6D14, 6D14T, 6D15 and 6D16 engines, including the Kato HD550, HD770 and HD880 excavators |
What it does
It circulates coolant through the block, head and radiator. A worn seal or bearing lets coolant out and the engine overheat.
Where it is used
Made for the Mitsubishi 6D14, 6D14T, 6D15, 6D16 engines and 3 more. The full list is in the tables above.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| EHE Parts | USD 98.00 | 29 Oct 2026 |
| eBay (8 aftermarket sellers) | USD 105.89 to 238.24 | 29 Oct 2026 |
| Kudu Parts | USD 150.00 | 3 Nov 2026 |
| WDPART | USD 158.40 | 29 Oct 2026 |
| YEM Parts | USD 226.76 | 3 Nov 2026 |
| Spare Part Mart | USD 81.93 | Today |
Our price of USD 81.93 is 16% to 66% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it was made for the Mitsubishi 6D14, and 6 more listed under compatible equipment. Check the old water pump is marked MD787131 or one of the cross references, because makers change parts between serial ranges.
On the Mitsubishi 6D14, often 5,000 to 10,000 hours with clean fluid, much less with dirt or air in the system. It is usually changed on condition, not by hours.
Leaks from the seal or weep hole, noise or whining, overheating, or falling pressure or flow under load.
If the coolant is old or dirty, yes. Worn coolant is the usual cause of seal failure, and a new pump in old coolant fails the same way.
Most failures come from contamination, cavitation from a restricted inlet, or running low on fluid. Check the inlet and the fluid before fitting the new water pump.
No. It is an aftermarket water pump made to replace the Mitsubishi MD787131. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
Join and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that. Turn points into a discount whenever you like.
Opens the Marty Mates panel. No password: you enter your email, we send a code, and that is you in with your 200 points waiting. Joining signs you up to our emails and you can leave any time from the link in any of them. See our terms and conditions.
Member deals, specials before they go public, and easy ways to stack up points. Plus a nudge when a part you bought is due, so you are not caught out mid job.
You can leave any time from the link in any email we send. See our terms and conditions.
We will only bother you when it is worth it: a member deal, a specials drop, a way to earn points faster, or a heads up that a part you bought is due.
Join Marty Mates and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that.
No password: you enter your email, we send a code, and that is you in.
