Skip to product information
SKU:
NLT2T02641
Ships for free in 2–4 business days.
Water Pump for Yanmar 2TR18 2TR20 3T70B 3T2SB 3T75U 3T75H – 121450-42010
$83.69
In Stock
$83.69
Sale price
$83.69
Regular price
This water pump circulates coolant through compatible Yanmar 2TR18, 2TR20, 3T70B, 3T2SB and 3T75-series engines and matches the 121450-42010 pump family.
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
| Application | Compatible Models / Details |
|---|---|
| Yanmar Engines | 2TR18, 2TR20, 3T70B, 3T2SB, 3T75U, 3T75H, 3T75HA |
Product Overview
The water pump is the mechanical heart of the engine cooling circuit. If the shaft seal begins leaking, the bearing develops play or coolant flow drops, the engine can run hot even when the radiator and thermostat are otherwise in good condition.
Matching listings for this pump identify Yanmar 121450-42010 together with 129350-42010 and 121023-42100. Those numbers and the listed 2TR/3T engine families are more useful for identification than appearance alone, because several early Yanmar pumps have similar castings.
Key Features & Performance
- Maintains coolant circulation through the block and radiator
- Addresses leakage, bearing noise or overheating caused by a worn pump
- Fits the listed early Yanmar 2TR and 3T engine families
- Multiple reference numbers make cross-checking the old pump easier
Reference Numbers & Specifications
- Reference number(s): 121450-42010, 129350-42010, 121023-42100; cross-reference CH15502
- Part type: engine water pump
- System: liquid cooling
- Application: Yanmar industrial / tractor engine family
Before You Order
- Match the casting, hub and hose/mounting locations to the original pump.
- Check the cooling system for a restricted radiator, failed thermostat or damaged belt if overheating was the reason for replacement.
Frequently Asked Questions
When should a water pump be replaced?
Common reasons include coolant leakage at the pump, shaft play, bearing noise or confirmed poor circulation.
Should the cooling system be serviced at the same time?
Yes. Clean sealing surfaces, inspect the drive belt and refill/bleed with the coolant specified for the machine.
Compatibility can vary by engine, serial number and equipment configuration. Match the original part number and physical configuration whenever possible before ordering.