Product Description
The Big Joe BJ 21719 hydraulic seal kit provides direct replacement sealing for manual pallet jack lift ram hydraulic systems. Engineered from high-grade nitrile rubber with reinforced elements, this kit restores hydraulic integrity and prevents leaks in 1-5/8 inch lift ram units. Rated for 3000 PSI system compatibility and suitable for ISO 32 and ISO 46 hydraulic oils. Available under multiple cross-reference part numbers including BJ21719 and 21719S, ensuring compatibility with Big Joe and compatible brand manual pallet jacks.
Specifications
Hydraulic
| Working Pressure | 3000 PSI maximum hydraulic system compatibility |
| Port Specification | Compatible with hydraulic ports up to 3/4 inch NPT thread |
| Applicable Lift Ram Size | 1-5/8 inch |
Material & Construction
| Seal Material | High-grade nitrile rubber with reinforced thermoplastic elements |
| Hydraulic Fluid Compatibility | Suitable for use with ISO 32 and ISO 46 hydraulic oils |
Part Numbers
| Manufacturer Part Number | BJ 21719 |
| Cross-Reference Part Numbers | BJ21719, BJ-21719, BJ 21719-SLIM, 21719S |
Frequently Asked Questions
Q: What equipment does the BJ 21719 hydraulic seal kit fit?
A: The BJ 21719 is a hydraulic seal kit for manual pallet jacks with 1-5/8 inch lift ram hydraulic units. It is designed for repair and restoration of hydraulic sealing integrity in Big Joe manual pallet jacks. Confirm your equipment has a 1-5/8 inch lift ram before ordering.
Q: What material is the BJ 21719 seal kit made from?
A: The BJ 21719 is constructed of high-grade nitrile rubber with reinforced thermoplastic elements. Nitrile rubber provides good resistance to mineral-based hydraulic oils and maintains flexibility across typical operating temperature ranges.
Q: What pressure rating does the BJ 21719 seal kit handle?
A: The BJ 21719 is rated for system pressures up to 3000 PSI. This pressure range covers standard manual pallet jack hydraulic systems. Do not use in systems exceeding this pressure specification.
Q: What are the cross-reference part numbers for BJ 21719?
A: Cross-reference numbers include BJ21719 (no space), BJ-21719 (with hyphen), BJ 21719-SLIM, and supersedes equivalent 21719S. The BJ 21719-SLIM variant is also available as a separate SKU. All reference compatible seal kits for Big Joe manual pallet jacks.
Q: What hydraulic fluid is compatible with the BJ 21719?
A: The BJ 21719 is compatible with ISO 32 and ISO 46 mineral hydraulic oils, which are standard hydraulic fluids used in manual pallet jack systems. Always use the correct ISO grade fluid specified in your equipment manual to avoid seal degradation.
Q: How often should the BJ 21719 seal kit be replaced?
A: Hydraulic seal kits typically last 3 to 7 years depending on frequency of use and maintenance. Signs of failure include slow or spongy pump operation, external leaks around the lift ram, or difficulty maintaining load height. Replace seals immediately if these symptoms appear to prevent equipment damage.