Product Description
Hydraulic seal kit for manual pallet jack repair, compatible with Crown PTH-50 hydraulic units. Contains precision-molded seals and retaining hardware, engineered for operation up to 3000 PSI and designed for direct fit replacement. Restores proper hydraulic pressure containment in worn hydraulic cylinder assemblies.
Specifications
Hydraulic/Pneumatic
| Fluid Compatibility | Suitable for mineral hydraulic oil ISO 32/46 |
| Pressure Rating | Up to 3000 PSI |
Material & Construction
| Seal Hardness | Nitrile, 70 Shore A; Polyurethane, 92 Shore A |
Mechanical Specifications
| Compatible Equipment Model | Crown PTH-50 manual pallet jack |
| Application Range | Hydraulic repairs for Crown manual pallet jack, PTH-50 series |
Part Numbers
| Part Number | 3135445 |
Frequently Asked Questions
Q: What does this seal kit contain and what is it used for?
A: This hydraulic seal kit contains precision-molded seals and retaining hardware designed to replace worn seals in hydraulic cylinder assemblies and pump components. The kit restores proper hydraulic pressure containment in Crown PTH-50 manual pallet jacks.
Q: Which Crown pallet jack models is this seal kit compatible with?
A: This seal kit is engineered specifically for Crown PTH-50 series manual pallet jacks. It provides direct-fit replacement seals for the PTH-50 hydraulic unit. Do not use this kit on other Crown models or non-Crown equipment without confirming seal housing dimensions.
Q: What are the material specifications for this seal kit?
A: The kit includes two elastomer types: Nitrile seals at 70 Shore A hardness for rod seals and piston applications, and Polyurethane seals at 92 Shore A hardness for housing seals and static applications. These materials provide robust chemical resistance and long-term durability in hydraulic fluid environments.
Q: What is the maximum pressure rating for this seal kit?
A: This seal kit is engineered for operation up to 3000 PSI, the standard pressure range for Crown manual pallet jack hydraulic systems. The seal materials and design handle both static and dynamic pressure cycles typical of load clamping and lifting operations.
Q: How long does this seal kit typically last in service?
A: Under normal warehouse duty, a seal kit installed in a Crown PTH-50 typically maintains integrity for 3 to 5 years or longer, depending on pallet jack usage frequency and maintenance practices. Seals degrade faster in hot environments or if hydraulic fluid is contaminated or overdue for replacement.
Q: What hydraulic fluid should be used with this seal kit?
A: This seal kit is compatible with mineral hydraulic oil ISO 32/46. Use only the recommended fluid grade to ensure proper seal material performance and system longevity. Using incorrect fluid types can accelerate seal degradation.
Q: How do I know when seals need replacement?
A: Signs of seal wear include hydraulic fluid leaks around the cylinder rod, loss of lifting pressure, jerky or slow lifting operations, and visible hydraulic stains on the pallet jack frame. Regular inspection and prompt replacement prevent system damage and maintain safe operation.