Product Description
The 220023521 piston and cylinder assembly is a manual hydraulic component for pallet jacks, engineered to convert manual force into hydraulic pressure for lifting. OEM part number 220023521. Assembly includes precision machined steel cylinder and chrome-plated piston, U-cup pressure seal and wiper seal, and return spring. Compatible with standard manual pallet jack hydraulic systems. No cross-reference part numbers are currently available.
Specifications
Hydraulic
| Primary Function | Converts manual input to hydraulic pressure for lift actuation |
| Seal Type | U-cup pressure seal and wiper/dust seal |
| Installation Orientation | Wide side of U-cup seal faces pressure side, wiper seal lip faces outwards |
Material & Construction
| Finish | Electroplated and powder-coated to prevent corrosion |
Part Numbers
| OEM Part Number | 220023521 |
Frequently Asked Questions
Q: What does the 220023521 piston and cylinder assembly do?
A: The 220023521 is a manual hydraulic piston and cylinder assembly that converts manual input force into hydraulic pressure to lift the load on manual pallet jacks. It is a core component in the hydraulic lift system and includes a precision-machined steel cylinder, chrome-plated piston, U-cup pressure seal, wiper seal, and return spring.
Q: What seals come with this assembly and how should they be oriented?
A: The 220023521 includes a U-cup pressure seal and a wiper/dust seal. The wide side of the U-cup seal must face the pressure side of the cylinder, and the wiper seal lip must face outward. Correct orientation is critical for proper pressure containment and preventing contamination.
Q: What materials and finish does this piston and cylinder assembly use?
A: The 220023521 features a precision-machined steel cylinder that is electroplated and powder-coated for corrosion resistance. The piston is chrome-plated to provide durability and reduce friction within the cylinder bore.
Q: Is the 220023521 compatible with all manual pallet jacks?
A: The 220023521 is designed for standard manual pallet jack hydraulic systems. Before ordering, verify that your equipment uses a compatible hydraulic lift mechanism. This is the OEM part number 220023521, which serves as the primary reference for fitment verification.
Q: How long does this piston and cylinder assembly typically last?
A: Lifespan depends on maintenance and use intensity. Regular inspection of seals for wear, maintaining proper hydraulic fluid level and cleanliness, and checking for internal leakage will extend component life. Seal degradation is the most common failure mode, usually occurring after several years of regular use.
Q: What are common failure symptoms for this assembly?
A: Symptoms include slow or inconsistent lift action, hydraulic fluid leaking from the cylinder rod area, a spongy feel when pumping the jack handle, or the load drifting down under no load. These indicate seal wear or internal piston damage and require replacement.