CR 40225-4

Frequently Asked Questions

Q: What is the rod diameter specification for the CR 40225-4?
A: The CR 40225-4 is designed to fit a 0.750-inch (3/4 inch) rod diameter in Crown PTH Series hydraulic pump assemblies. Verify the rod diameter in your equipment before ordering to ensure proper fit and sealing performance.

Q: Which Crown pallet jack models use the CR 40225-4 rod seal?
A: The CR 40225-4 is an OEM hydraulic rod seal for Crown PTH Series manual pallet jack hydraulic pump assemblies. This seal is compatible with Crown PTH model equipment and replaces the original rod sealing element in pump units.

Q: What is the maximum working pressure for this rod seal?
A: The CR 40225-4 is rated for working pressures up to 3625 PSI in Crown PTH hydraulic systems. This higher pressure rating accommodates continuous-duty operation in manual pallet jack pump applications with precision-engineered sealing interfaces.

Q: What material is the CR 40225-4 manufactured from?
A: The CR 40225-4 is manufactured from hydraulic-grade nitrile rubber and features a precision ground sealing lip molded for exact interface fit. This elastomer material provides superior durability and pressure containment in continuous-duty manual jack applications.

Q: How do I know if the CR 40225-4 rod seal needs replacement?
A: Replace the CR 40225-4 when hydraulic fluid leaks externally along the rod or pump shaft, when lift pressure becomes difficult to maintain, or when the jack loses load position during holding. Internal fluid discoloration or visible rod scoring also indicates rod seal wear and replacement requirement.