Product Description
The 21719-SLIM Slim Seal Kit by Multiton is a direct replacement hydraulic seal kit engineered for the S Foot Control manual pallet jack series. This kit includes U-cup and O-ring seals made from NBR, providing superior sealing reliability under demanding hydraulic operating conditions. The slim profile design is specifically engineered to fit Multiton S-series hydraulic cylinders with precision fit and performance, ensuring smooth lifting and reliable load holding in manual pallet jack applications.
Specifications
Product Identity
| Part Number | 21719-SLIM |
| Cross-Reference Part Numbers | 21719, 21719-SLIM-TH |
| Supersedes Part Numbers | MU 21719 |
Hydraulic Specifications
| Maximum Working Pressure | Up to 3000 PSI |
| Fluid Type Compatibility | Mineral oil-based hydraulic fluids |
Material & Construction
| Seal Material | NBR elastomer |
| Seal Hardness - U-Cup | 70 Shore A nominal |
| Seal Hardness - O-Rings | 90 Shore A nominal |
| Kit Contents | U-cup and O-ring seals |
Compatibility
| Compatible Make | Multiton |
| Compatible Model | S Foot Control |
| Equipment Type | Manual pallet jack with foot pedal actuation |
Frequently Asked Questions
Q: What is the MU 21719-SLIM and how does it differ from standard seal kits?
A: The MU 21719-SLIM is a slim seal kit engineered specifically for Multiton S series foot-control manual pallet jack hydraulic units. The slim profile design accommodates the specific bore and rod dimensions of S-series hydraulic cylinders, providing a direct OEM replacement for this application.
Q: What is the material composition and hardness specification of this seal kit?
A: The MU 21719-SLIM contains NBR elastomer seals with a hardness specification of 70 Shore A nominal for the primary U-cup and 90 Shore A nominal for elastomer O-rings. These hardness ratings ensure proper sealing under 3000 PSI maximum pressure while maintaining flexibility and durability in mineral oil-based hydraulic fluids.
Q: What are the equivalent part numbers and which does this replace?
A: The MU 21719-SLIM is equivalent to MU 21719 and MU 21719-SLIM-TH. It supersedes prior Multiton MU 21719 seal kits for S-series applications. When ordering, any of these cross-reference numbers can be used interchangeably for Multiton S series foot-pedal actuated hydraulic units.
Q: What is the maximum working pressure rating for this seal kit?
A: The MU 21719-SLIM is rated for up to 3000 PSI maximum working pressure in pallet jack hydraulic systems. This pressure rating accommodates typical Multiton S-series manual jack load requirements. Operating above this pressure rating may cause seal failure and system leakage.
Q: Why would I need to replace the MU 21719-SLIM seal kit?
A: Seal replacement becomes necessary when you observe hydraulic fluid leakage from the cylinder rod, gradual loss of lifting pressure, or the jack no longer holds load. NBR elastomers degrade over time through exposure to hydraulic fluid, thermal cycling, and pressure cycling, eventually losing their sealing effectiveness. A timely replacement restores system integrity and prevents further fluid loss.