Product Description
The 44648 is a complete hydraulic seal kit engineered for Crown PTH-50 manual pallet jacks. This precision-molded seal assembly restores pump performance and eliminates costly hydraulic leaks. The kit includes nitrile and polymer seals sized for hydraulic cylinders, pistons, and valve applications, delivering reliable pressure containment in demanding warehouse and dock environments.
Specifications
Hydraulic/Pneumatic
| Seal Materials | Nitrile rubber and polymer blend |
| Hydraulic Pressure Rating | 2900 PSI maximum hydraulic system pressure |
| Bore Diameter | 1.125 inch |
| Rod Diameter | 0.625 inch |
Material & Construction
| Seal Hardness | 70 Shore A (nitrile components) |
Part Information
| Manufacturer Part Number | 44648 |
| Compatible Equipment | Crown PTH-50 manual pallet jack, Serial #7-000000 through 7-512501 |
| Alternate Model Designations | PTH50, PTH 50 |
Frequently Asked Questions
Q: What does the 44648 seal kit contain?
A: The 44648 is a complete hydraulic seal kit with precision-molded nitrile and polymer seals designed for Crown PTH-50 pump units. The kit provides seals for hydraulic cylinders, pistons, and valve applications to eliminate leakage and maintain system pressure integrity.
Q: What Crown pallet jack serial numbers is the 44648 compatible with?
A: The 44648 is compatible with Crown PTH-50 manual pallet jacks bearing serial numbers 7-000000 through 7-512501. Always verify your equipment serial number before ordering to ensure proper fit. Units with higher serial numbers may require the CR 44648-AM kit variant.
Q: What are the pressure and bore specifications?
A: The 44648 is rated for a maximum hydraulic system pressure of 2,900 PSI. The seals are dimensioned for a 1.125 inch bore and 0.625 inch rod diameter. Using seals outside these specifications can result in leakage or component failure.
Q: What seal material is used in the 44648?
A: The 44648 contains nitrile rubber and polymer blend seals with a Shore A hardness rating of 70. This material composition delivers excellent resistance to hydraulic fluid, temperature extremes, and the pressure cycling typical of manual pallet jack service.
Q: Why would seals need replacement?
A: Hydraulic seals degrade over time due to pressure cycling, temperature exposure, and fluid contact. Common signs of seal failure include visible oil leaks around the cylinder rod, reduced lift speed, or inability to maintain load. The 44648 restores system integrity and prevents further damage to pump and cylinder components.
