Product Description
MU 21719-SLIM-TH seal kit for Multiton S Series manual pallet jack hydraulic units. Includes NBR elastomer seals and acetal backup rings, suitable for system pressures up to 3000 PSI and compatible with ISO 32/ISO 46 hydraulic fluids. Direct replacement and cross-reference for previous kit numbers.
Specifications
Hydraulic/Pneumatic
| Seal Material | Nitrile (NBR) elastomer |
| Maximum System Pressure | 3000 PSI |
| Hydraulic Fluid Compatibility | Compatible with ISO 32 and ISO 46 hydraulic oils |
Material & Construction
| Seal Hardness | 70 Shore A (NBR) |
| Backup Ring Material | Acetal polymer |
Part Numbers & Compatibility
| OEM Part Number | MU 21719-SLIM-TH |
| Manufacturer Part Number | MU 21719-SLIM-TH |
| Cross-Reference Part Numbers | Replaces MU 21719, supersedes 1624419, equivalent to MU21719SLIM |
Frequently Asked Questions
Q: What does the MU 21719-SLIM-TH seal kit contain?
A: The MU 21719-SLIM-TH is an OEM seal kit for Multiton S series manual pallet jack hydraulic units. It includes NBR elastomer seals and acetal backup rings assembled as a complete kit. The backup rings support the elastomers under pressure and extend seal life under dynamic load conditions.
Q: What hydraulic fluid types is this seal kit compatible with?
A: The MU 21719-SLIM-TH is compatible with ISO 32 and ISO 46 hydraulic fluids. These mineral oil-based fluids are standard in manual pallet jack hydraulic systems. Verify your equipment specifications to confirm the correct ISO grade is in use, as using incompatible fluid types can degrade seal material and cause leakage.
Q: What are the cross-reference and superseded part numbers?
A: The MU 21719-SLIM-TH replaces MU 21719, supersedes part number 1624419, and is equivalent to MU21719SLIM. These part numbers all reference the same OEM seal kit for Multiton S series hydraulic units. When ordering replacement kits, any of these numbers will provide a compatible direct replacement.
Q: What is the maximum system pressure this seal kit handles?
A: The MU 21719-SLIM-TH is rated for a maximum system pressure of 3000 PSI. This rating covers the typical operating range for Multiton S series manual pallet jacks under standard load conditions. Operating beyond this pressure specification increases the risk of seal failure and hydraulic fluid leakage.
Q: What is the seal material and what does the acetal backup ring do?
A: The kit uses nitrile (NBR) elastomer seals paired with acetal backup rings. The NBR elastomer provides the fluid-sealing surface, while the acetal backup rings prevent seal extrusion under pressure and distribute load more evenly across the seal surface. This combination extends seal life and maintains reliable sealing performance.