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SKU:
NLT2T00168
Ships for free in 2–4 business days.
8943768431 Water Pump for Hitachi EX90 EX100 EX120 Isuzu 4BD1 Engines
$175.79
In Stock
$175.79
Sale price
$175.79
Regular price
Restore coolant circulation on compatible Hitachi excavators powered by the Isuzu 4BD1 engine with water pump 8943768431.
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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
- Hitachi EX90-2
- Hitachi EX100-2
- Hitachi EX100-3
- Hitachi EX100-3C
- Hitachi EX100M-2
- Hitachi EX120-2
- Hitachi EX120-3
- Hitachi LX70
- Other equipment with Isuzu 4BD1 engine using 8943768431
Product Overview
A pump leak, loose shaft, grinding bearing, or rising temperature under digging load can take an excavator out of service fast. This replacement matches several EX-series machines using the 4BD1 cooling layout.
Machine suffix and engine configuration matter. Compare the housing, pulley hub, hose ports, and 8943768431 reference; also clean the radiator and verify the thermostat and fan before blaming every overheat on the pump.
This is an aftermarket replacement part and is not manufactured or supplied by the original equipment brand.
Key Features & Performance
- Replacement water pump for Isuzu 4BD1 engine applications
- Matches 8943768431 and related 8-943768xx references
- Fits select Hitachi EX-series excavators
- Targets coolant leaks, bearing play, and failed circulation
Replaces Part Numbers
- 8943768431
- 8-94376843-1
- 8-94376865-0
- 8972511841, when cross-reference and pump design match
Common Uses
- Repairing coolant leakage at the pump
- Replacing a noisy or loose pump bearing
- Restoring circulation after an impeller failure
- Servicing the cooling system during engine repair
Technical Specifications
- Product Type: Engine water pump
- Engine: Isuzu 4BD1
- Application: Select Hitachi excavators
- Replacement Type: Aftermarket
Installation & Fitment
- Allow the engine to cool and drain coolant
- Compare the replacement housing and hub height
- Clean the gasket surface and inspect hose condition
- Set belt tension correctly
- Refill, bleed air, and monitor temperature and leaks under load
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown. Model names alone may not guarantee fitment. Compare the original component, reference number, connector or mounting design, dimensions, and any serial-number or production-date break before purchase.
Frequently Asked Questions
Q: Does it fit the EX120-3? A: Yes, on 4BD1-powered applications using 8943768431.
Q: Can a water pump cause overheating only under load? A: Yes, but a plugged radiator, loose belt, thermostat, fan, or engine problem can do the same.
Q: Should I match the engine or machine model? A: Match both, with the original pump number and physical design as the final check.
Part Summary
keywords: 8943768431 water pump, Hitachi EX100-2 cooling repair, EX120-3 4BD1 pump, Isuzu excavator coolant leak, 8-94376843-1 replacement, Hitachi overheating part
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.