Product Description
Dayton WW 97-158 Pump Piston Seal Kit is an OEM replacement hydraulic piston sealing solution for manual pallet jack pump assemblies, compatible with Dayton models such as 4YX97 and their equivalents. The kit includes polyurethane and buna-n seals for restoration of hydraulic pressure integrity in the pump plunger, supporting system pressures up to 3000 PSI and compatible with standard ISO hydraulic oils.
Specifications
Compatibility
| Interchange Information | Kit equivalent to aftermarket replacements labeled as WW 97-158, 97-158, and Grainger 4YX97 |
Material
| Seal Hardness | 70 Shore A nominal hardness (buna-n) |
Part Numbers
| OEM Part Number | WW 97-158 |
| Manufacturer Part Number | 97-158 |
| Cross-Reference Part Numbers | Compatible Grainger Part Number: 4YX97; also referenced as Dayton 97-158 |
| Equivalent Part Number | Dayton 97-158; referenced as Plunger Seal Kit for Dayton Pallet Jacks |
| Applicable Model | Fits Dayton manual pallet jack models, including model 4YX97 |
Frequently Asked Questions
Q: What does the WW 97-158 Pump Piston Seal Kit contain?
A: The WW 97-158 is an OEM replacement hydraulic piston sealing kit for manual pallet jack pump assemblies. It includes polyurethane and buna-n seals designed to restore full hydraulic pressure integrity in the pump plunger and piston bore.
Q: What is the maximum pressure rating for the WW 97-158 seals?
A: The WW 97-158 seal kit is engineered for system pressures up to 3000 PSI in manual pallet jack pump circuits. This rating applies to standard ISO hydraulic oils. Do not exceed the rated pressure.
Q: Which Dayton pallet jack models use the WW 97-158?
A: The WW 97-158 is compatible with Dayton manual pallet jacks including the 4YX97 series and equivalent models. It is cross-referenced with Grainger part number 4YX97 and matches OEM part number 97-158.
Q: What material properties do the WW 97-158 seals provide?
A: The kit includes polyurethane and buna-n seals that provide excellent resistance to standard ISO hydraulic oils and temperature ranges in material handling equipment. Both materials are compatible with typical manual jack operating conditions.
Q: How do I know if pump piston seals need replacement?
A: Jack requires excessive pump strokes to build pressure, pump handle feels soft or spongy, oil seeps from the pump body, or pressure cannot be maintained. Leakage around the pump rod also indicates seal failure.
Q: How often should the WW 97-158 pump piston seals be replaced?
A: Seal lifespan depends on usage frequency and hydraulic oil quality. Seals typically last 2-5 years of regular heavy use. Contaminated oil or excessive heat accelerates degradation. Replace when pump pressure loss occurs or visible leakage appears.