Hand Priming Fuel Feed Pump for Hitachi DX40/DX45 Excavator Series
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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.
| Brand / Equipment | Compatible Models / Engines | Fitment Notes |
|---|---|---|
| Hitachi | DX40-C, DX45-C | Excavators |
| Hitachi | DX40M-C, DX45M-C | Excavators |
| Hitachi | DX40MM-C, DX45MM-C | Excavators |
Product Overview
A hand primer is used to draw fuel through the low-pressure side of a diesel system after filter replacement, fuel-line service or running the machine out of fuel. If the primer check valves or seals fail, the system may be difficult to bleed and can repeatedly pull air into the fuel supply.
The original listing groups several DX40/DX45 variants together. Since older compact excavators can have engine and pump revisions, compare the mounting flange, line fittings and the pump removed from the engine before ordering.
Key Features & Performance
- Manual fuel-system priming after service
- Helps purge air from the low-pressure fuel circuit
- Application-specific replacement for listed Hitachi DX40/DX45 variants
Product Details
- Component: Hand priming / fuel feed pump
What to Verify Before Ordering
Compare fuel-port orientation, mounting bolt pattern and engine/pump information before ordering.
Frequently Asked Questions
When is a hand primer used?
Typically after opening the fuel system for filter/line service or when air must be bled before starting.
Can a faulty primer cause hard starting?
Yes. A leaking primer or failed internal check valve can let the low-pressure fuel system lose prime or draw air.