CR-44648 Complete Seal Kit for Crown PTH50 (newer)
SKU: CR 44648
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Product Description
The CR-44648 hydraulic seal kit fits newer Crown PTH50 pallet jacks (serial #7-512501 and above). It includes polyurethane and nitrile seals for the pump piston, ram cylinder, and valve assemblies, all of which match OEM specifications. This kit stops leaks, restores lifting pressure, and extends service life as a cost-effective alternative to replacing the pump. (For older PTH models, use a different seal kit.)
The kit includes:
Ball – (CR 55001-007)
Back-Up Ring – (CR 64074-005)
O-Ring – (CR 54002-012)
U-Cup – (CR 54015-005)
Tappet – (CR 41286)
Washer – (CR 50011-010)
Ball Housing – (CR 41289)
Ball – (CR 55001-002)
Spring – (CR 41288)
Washer – (CR 50011-020)
Bushing – (CR 41166)
U-Cup – (CR 54015-001)
Scraper – (CR 54001-008)
O-Ring – (CR 54002-024)
Spring – (CR 44456)
Scraper – (CR 54001-009)
Cross References
This seal kit can also be found under the following part numbers:
Product Specifications
The specifications of this seal kit are mentioned below.
Features of this Product
Kit includes all seals, O-rings, U-cups, wipers, and backup rings for a full hydraulic rebuild.
Stops leaks and drifting, restoring full lifting and holding capacity.
Fits newer Crown PTH50 models (serial #7-512501 and up).
Made from OEM-quality nitrile and polyurethane for durability and performance.
Precision-sized for a tight fit in pump cylinders and valve ports; labeled for easy install.
Fixes issues like poor lift, oil leaks, and loss of pressure.
Provides a cost-effective alternative to replacing the entire pump.
Warranty Information
1-year limited manufacturer warranty.
This warranty covers any defects in the seals or materials. If a seal from the kit fails due to a manufacturing defect within one year of purchase.
Our Return & Refund Policy
We accept returns within 30 days if the seal kit is unused and in new condition, preferably in original packaging. Non-defective returns incur a 20% restocking fee, while defective or incorrect items qualify for a full refund. Contact customer service for an RMA before returning. See our Return & Refund Policy for details. If you are unsure about the fit, please contact us before opening the package.
Not Sure If This Seal Kit Fits Your Equipment?
Contact our experts at 832-239-5393 or 1-800-210-8170, or email info@palletjackson.com. We also have live chat available during business hours—our team (available Monday–Friday, 9 am to 6 pm EST).
Frequently Asked Questions
Q: How do I know if my Crown PTH50 is a newer model that this kit fits?
A: Check the serial number. Crown PTH50 pallet jacks with serial 7-512501 or higher use this seal kit. Older models (e.g., 7-430000) need a different kit. You can also identify newer units by their updated pump design. If unsure, provide your serial number, and we’ll confirm the correct kit for your jack.
Q: Does this kit include instructions or a diagram for the rebuild?
A: The kit usually does not include printed instructions, but we can provide an exploded parts diagram of the PTH50 hydraulic unit. The diagram shows each seal’s location. Rebuilding involves removing the pump, replacing the O-rings and seals, and reassembling it.
Q: What type of hydraulic oil should I use after installing the seals?
A: Use ISO VG 32 hydraulic jack oil, the grade Crown recommends. Do not use motor oil or brake fluid. The unit holds about 0.3–0.5 liters (roughly a pint).
Q: Are the seals in this kit identical to the original Crown seals?
A: Yes, they match OEM dimensions and performance, though colors may differ. They are made of high-quality materials for hardness and chemical resistance, similar to Crown’s seals.
Q: Can I reuse any of my old seals, or do I have to replace all of them?
A: Replace all seals and O-rings during the rebuild. Mixing old and new parts creates uneven performance. Since the kit is complete, use every piece provided. Installing all new seals ensures a consistent fit and reliable operation.
Q: What other parts might I consider replacing along with the seals?
A: Inspect the piston rod and pump piston—pitted or rusted surfaces will quickly damage new seals. Check the thrust bearing at the handle pivot and the release valve cartridge for wear or corrosion. Replace any excessively worn metal parts while rebuilding. Always add fresh hydraulic oil.
Frequently Bought Together
Browse our Crown PTH50 parts catalog for other components to refurbish your pallet jack fully. We carry a wide range of parts to help you keep your Crown PTH50 running reliably.
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