Fuel Hand Priming Pump for Hitachi ZX80LCK, ZX80SB & ZX85US Excavators
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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.
| Hitachi excavators | ZX80LCK |
|---|---|
| ZX80SB | |
| ZX85US-HCME / related ZX85US configurations |
Product Overview
A priming pump is most useful after changing fuel filters, replacing a hose, running the machine out of fuel, or opening the injection supply circuit. It lets the operator or technician move diesel through the filter and lines so air can be purged before attempting a restart.
The same excavator model can be fitted with different engine and fuel-system arrangements by serial number or market. For that reason, the safest match is the pump body, port layout and engine/fuel-system configuration on the machine rather than the ZX model alone.
Key Features & Performance
- Manual fuel-system bleeding after maintenance
- Helps reduce extended starter cranking caused by trapped air
- Compact feed/primer-pump configuration for Hitachi excavator applications
- Useful when the original hand primer leaks, will not build pressure or has damaged threads/valves
Part Numbers & Specifications
- Component: hand fuel priming/feed pump
- System: low-pressure diesel fuel supply
Before You Order
Compare the existing pump, ports and mounting arrangement before ordering. If the machine repeatedly loses prime after sitting, inspect the entire suction side for air leaks and drain-back issues.
Frequently Asked Questions
Will a new primer fix every hard-start condition?
No. It only addresses priming/feed issues when the primer itself is faulty or air must be purged.
When should the primer become firm?
After air is purged and the fuel circuit is full, resistance should increase; continued softness can indicate an air leak or internal check-valve problem.
Why should I verify the engine?
ZX80/ZX85 machines can differ by serial number and market, so the fuel-system hardware can vary.