Product Description
PU AA-18 Pallet Mule O-Ring for AA5000 and AA5500 manual pallet jack hydraulic units. OEM replacement hydraulic seal, cross-references AA-18, PUAA-18, PTAA-18. Used in seal kit PU AA-76-5000. Suitable for manual pallet truck hydraulic pump sealing.
Compatibility: Fits pallet jacks made by Pallet Mule, model AA5000. SKU: PU AA-18
Specifications
Part Numbers
| OEM Part Number | PU AA-18 |
| Manufacturer Part Number | PU AA-18 |
| Cross-Reference Part Numbers | AA-18, PUAA-18, PTAA-18 |
| Compatible Models | Pallet Mule AA5000, Pallet Mule AA5500 |
Frequently Asked Questions
Q: What is the PU AA-18 and what does it do in the hydraulic pump?
A: The PU AA-18 is an OEM replacement hydraulic seal O-ring used in Pallet Mule manual pallet jack pumps. It seals the interface between the valve cone housing and other pump components to prevent hydraulic fluid leakage.
Q: Which Pallet Mule models use the PU AA-18 seal?
A: The PU AA-18 is designed for both Pallet Mule AA5000 and AA5500 manual pallet jack hydraulic units. It is included in the official PU AA-76-5000 seal repair kit.
Q: What are the cross-reference part numbers for this O-ring?
A: The PU AA-18 cross-references to AA-18, PUAA-18, and PTAA-18. Verify part fitment with your equipment documentation before ordering, as cross-references can vary by serial range.
Q: When should the PU AA-18 seal be replaced?
A: The PU AA-18 should be replaced if you observe hydraulic fluid leaking from the pump area or if the pump loses pressure during operation. Seals degrade over time and should be included in major pump overhauls.
Q: Is the PU AA-18 part of a complete seal kit?
A: Yes. The PU AA-18 is included as a component within the official PU AA-76-5000 seal kit. If you are performing a full hydraulic pump rebuild on AA5000 models, the complete kit provides all necessary seals in one purchase.