Product Description
HOUSING (INNER PUMP HOUSING)
Specifications
Physical Specifications
| Part Type | Inner Pump Housing |
| Material | Ductile Iron |
| Pressure Rating | 2500 PSI |
| Internal Components | Pump plunger, check valves, pressure relief valve, pump passages |
| Surface Finish | Precision-machined internal surfaces |
| Configuration | Standalone housing component (not including outer body) |
Compatibility
| Application | Manual pallet jacks |
Frequently Asked Questions
Q: What is the 7003077 inner pump housing and what does it contain?
A: The 7003077 is the internal body of the hydraulic pump in manual pallet jacks. It houses the pump plunger, check valves, pressure relief valve, and pump passages that direct and control hydraulic fluid flow during lifting operations.
Q: What material is the 7003077 housing manufactured from?
A: The 7003077 housing is cast from ductile iron, which provides strength to contain hydraulic pressures up to 2500 PSI, resists hydraulic fluid corrosion, and tolerates thermal cycling without cracking. Internal surfaces are precision-machined to tight tolerances for seal fit and valve operation.
Q: Which manual pallet jack models use the 7003077 inner pump housing?
A: The 7003077 housing fits manual pallet jacks from Crown, Toyota, Raymond, and Yale. Verify the pump assembly bore size, port locations, and handle linkage attachment points match your equipment before ordering.
Q: What causes the 7003077 housing to fail or leak?
A: Housing failure occurs from corrosion due to contaminated hydraulic fluid, casting porosity that develops micro-leaks over time, impact damage, or internal seal degradation that allows pressure loss. If the pallet jack loses pressure suddenly or leaks from the pump body, the housing may be cracked or corroded.
Q: Is the 7003077 available as a standalone replacement or only as an assembly?
A: The 7003077 is sold as the inner housing component only. It is installed within the outer pump body. Order the complete pump assembly kit if you need the full pump unit including check valves and internal springs, or the housing separately if rebuilding an existing pump.
Q: How do I know if the 7003077 housing needs replacement versus repair?
A: If the housing has visible cracks in the cast body, corrosion that creates surface pitting deeper than 1/8 inch, or leaks that continue after seal kit replacement, the housing must be replaced. Small surface corrosion can be cleaned and resealed; structural cracks cannot be repaired.
