Product Description
The Dayton WW 97-156 Lift Ram Seal Kit is a direct replacement hydraulic seal kit designed for the primary lift cylinder in Dayton 4YX97 manual pallet jacks. This complete seal kit features high-resilience nitrile rubber main seals paired with PTFE backup rings, engineered to restore full hydraulic sealing capability and maintain performance in heavy-duty hand pallet jack applications operating up to 3000 PSI.
Specifications
Hydraulic
| Seal Material | Nitrile rubber (NBR) with polyester or PTFE backup rings |
| Maximum Working Pressure | 3000 PSI |
| Leakage Rate | <0.5 cc/min at 3000 PSI, laboratory tested |
Material
| Seal Hardness | 70 Shore A nominal (NBR seals) |
Part Numbers
| Manufacturer Part Number | WW 97-156 |
| Original Equipment Part Number | 97-156 |
| Cross-Reference Part Numbers | Equivalent to Dayton 97-156, compatible with 4YX97 hand pallet jack |
| Compatible Models | Dayton 4YX97 |
Frequently Asked Questions
Q: What does the WW 97-156 Lift Ram Seal Kit contain?
A: The WW 97-156 is a complete OEM replacement hydraulic seal kit for the primary lift ram (lifting cylinder). It includes high resilience nitrile rubber main seals and PTFE backup rings engineered for heavy-duty hand pallet jack service.
Q: What is the maximum pressure rating for the WW 97-156 seal kit?
A: The WW 97-156 seal kit is engineered for system pressures up to 3000 PSI. This rating applies to standard hydraulic oil operation in Dayton 4YX97 manual pallet jacks. Do not exceed this pressure rating.
Q: Which Dayton pallet jack models use the WW 97-156?
A: The WW 97-156 is a direct replacement seal kit for Dayton 4YX97 manual pallet jacks. It is equivalent to OEM part number 97-156 and restores full hydraulic sealing capability in the primary lift cylinder.
Q: What material properties do the WW 97-156 seals have?
A: Seals are manufactured from nitrile rubber (NBR) main elements with polyester or PTFE backup rings. Nitrile rubber provides excellent resistance to standard ISO hydraulic oils and temperature ranges typical in material handling equipment.
Q: How do I know if the ram seals need replacement?
A: Jack loses load and drifts down under static load, oil seeps from the cylinder rod, external oil puddles appear below the jack, or pressure cannot be maintained during load testing. These symptoms indicate seal failure and require WW 97-156 replacement.
Q: How often should the WW 97-156 seals be replaced?
A: Seal lifespan depends on usage frequency, oil quality, and environmental conditions. Seals typically last 2-5 years of regular heavy use. Contaminated hydraulic fluid accelerates seal degradation. Replace when load drift occurs or external leakage is visible.