Product Description
GW 511 Seal Kit by Liftsplus.com is an OEM-compatible hydraulic seal replacement kit for manual pallet jack hydraulic units. The kit includes rod seals, piston seals, dust wipers, O-rings, and wear rings manufactured from TPU, NBR, and PTFE for extended service in high-cycle pallet jack applications. Equivalent to GP 511 and GP511. Suitable for cylinders with bore diameters from 1.00 to 1.25 inch and rod diameters from 0.50 to 0.75 inch. Rated for standard mineral oil-based hydraulic fluids and
Specifications
Hydraulic
| Seal Material | Thermoplastic polyurethane (TPU), nitrile butadiene rubber (NBR), polytetrafluoroethylene (PTFE) depending on seal position |
| Operating Fluid Compatibility | Mineral oil-based hydraulic fluid |
Material
| Seal Material Specification | TPU per ASTM D624, NBR per ASTM D2000 |
| Wear Ring Material | Phenolic fabric or PTFE |
| Hardness | Shore A 70-90 depending on seal location |
Part Numbers
| Primary Part Number | GW 511 |
| OEM Part Number | GW 511 |
| Cross-Reference Part Numbers | Equivalent to GP 511, GP511 |
| Supersedes/Replaces | Supersedes GP 511, Replaces GP511 |
Frequently Asked Questions
Q: What materials are used in the GW 511 seal kit?
A: The GW 511 seal kit includes components manufactured from thermoplastic polyurethane (TPU), nitrile butadiene rubber (NBR), and polytetrafluoroethylene (PTFE). Each material is selected for specific seal positions: PTFE for low-friction wear rings, NBR for primary sealing surfaces, and TPU for enhanced durability in high-cycle applications.
Q: Is the GW 511 a direct equivalent to the GP 511 seal kit?
A: Yes. The GW 511 is equivalent to GP 511 and GP511, and supersedes the earlier GP 511 designation. All three part numbers provide the same OEM-compatible seal composition and fit specifications for manual pallet jack hydraulic units.
Q: What cylinder and rod diameters is the GW 511 compatible with?
A: The GW 511 is rated for cylinders with bore diameters from 1.00 to 1.25 inch and rod diameters from 0.50 to 0.75 inch. Measure your cylinder bore and rod diameter before ordering. Mismatched seal sizes will not create a proper seal and will cause immediate leakage.
Q: Can I use the GW 511 with synthetic hydraulic fluids or only mineral oil?
A: The GW 511 kit is rated for standard mineral oil-based hydraulic fluids. Do not use synthetic or bio-based hydraulic fluids with this kit without confirming compatibility with the fluid manufacturer. Incompatible fluids can degrade TPU and NBR seals, causing leaks and system failure.
Q: What tools and procedures are required to install the GW 511 seal kit?
A: You will need a hydraulic press, seal driver or installation tool, snap ring pliers, and clean work space. Remove the old seals carefully without damaging the cylinder bore or rod surfaces. Inspect for scoring or corrosion. Apply a thin coat of hydraulic fluid to new seals before installation. Install seals in the correct sequence: wiper ring first, then piston seal, then rod seal. Use the press and driver tool to seat seals fully without over-compression.
Q: How often should the GW 511 seals be replaced in heavy-duty pallet jack service?
A: In high-cycle warehouse environments (200+ lift cycles per day), inspect seals every 6 months and plan replacement every 12 to 18 months. In moderate-duty service, replacement is typically required every 2 to 3 years. Monitor hydraulic fluid condition and replace seals sooner if fluid shows signs of contamination, discoloration, or sludge.
