ML AK100 Seal Kit – Mighty Lift ML55-II/ML55L Pallet Jack
SKU: ML AK100
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Product Description
The ML AK100 seal kit is compatible with the Mighty Lift ML55-II and ML55L manual pallet jacks. It contains all the hydraulic seals needed to rebuild the jack’s pump unit and restore lifting performance. Each kit includes high-quality O-rings, U-cups, wipers, and backup rings for the hydraulic cylinder and valve assembly. These seals are designed to match the OEM dimensions for a leak-proof fit.
The kit includes:
Dust Ring - (A304)
U-Cup - (A305)
Seal Washer - (A323)
U-Cup - (A325)
O-Ring - (A326)
Wiper - (A327)
O-Ring - (A331)
Cross References
This seal kit can also be found under the following part numbers:
Product Specifications
The specifications of this product are mentioned below.
Features of this Product
Complete seal replacement kit for the Mighty Lift ML55-II and ML55L pallet jack pump – includes all major seals, O-rings, and gaskets needed for a full hydraulic unit rebuild.
Precision-engineered seals ensure a tight, leak-free fit, restoring the jack’s lifting capacity and holding pressure while eliminating hydraulic oil seepage during operation.
Direct-fit design matches original seal dimensions and materials for reliable performance. No modifications are required to install these replacement seals.
Constructed from durable, oil-resistant rubber and polyurethane components that withstand high pressure and repeated pumping cycles without premature wear or deformation.
Helps resolve common pallet jack issues, such as the inability to lift to full height or slow lowering under load, by renewing all sealing surfaces in the pump assembly.
Cost-effective solution to extend equipment life – replaces only the worn internal seals rather than the entire hydraulic unit, saving on repair costs and downtime.
Each kit is quality-inspected and packaged for convenience. Seals arrive organized and ready for installation, preventing confusion and ensuring all necessary parts are readily available.
Warranty Information
A 1-year limited manufacturer's warranty covers this aftermarket seal kit. It guarantees the kit to be free from defects in materials and workmanship for one year from the date of purchase. If any seal fails due to a manufacturing defect within this period, we will provide a replacement kit or a refund, as outlined in our warranty policy.
Our Return & Refund Policy
We offer a 30-day return policy on this product. To be eligible for a return, your seal kit must be unused, in the same condition that you received it, and in its original packaging. Please retain your receipt or proof of purchase as a record. For full details or to initiate a return, visit our refund policy page.
Not Sure If This Seal Kit Fits Your Equipment?
Reach us by phone at 832-239-5393 or 1-800-210-8170, by email at info@palletjackson.com, or via our website’s live chat. Our experts are available Monday through Friday, 9 am to 6 pm EST, to ensure you receive the exact parts you need.
Frequently Asked Questions
Q: Are the seals in this kit as good as the OEM ones?
A: Yes. These seals meet or exceed OEM standards in material and size. They use high-quality, oil-resistant compounds similar to the originals. Once installed, they handle the same pressures and temperatures, offering equal durability and reliability. With normal use and maintenance, you can expect performance comparable to factory seals.
Q: How often should pallet jack seals be replaced?
A: Seal life depends on use and conditions. In most warehouses, seals last several years. Replace them if you see leaks, reduced lifting, or performance issues. Heavy use, harsh environments, or poor maintenance may shorten lifespan. Regular inspection and early replacement at the first signs of wear prevent major failures.
Q: Is it necessary to replace all the seals at once?
A: Yes, it’s best to replace all seals together. Even if only one leaks, others are likely worn and may fail soon. A full replacement refreshes the system, saves time, and prevents repeated repairs. The ML AK100 kit includes all critical seals, restoring performance and reliability to near-new condition.
Q: Do I need to change the hydraulic oil after installing the new seals?
A: Yes. Refill with fresh hydraulic oil after replacing seals. Opening the pump often exposes old or contaminated oil. Clean oil protects new seals and ensures smooth operation. Use the manufacturer’s recommended grade (typically ISO 32). After refilling, bleed air from the system to restore proper lifting function.
Q: What is the difference between this seal kit and the ML BK100 kit for Mighty Lift jacks?
A: The ML AK100 kit includes all major seals for ML55-II/ML55L models. The ML BK100, also known as the “ball kit,” contains pump valve parts, including balls, springs, and O-rings. Older models may require both kits, but newer ML55 units usually only need the AK100 for a full seal rebuild.
Frequently Bought Together
ML B35-S Load Wheel Assembly – Mighty Lift ML55/ML55L Pallet Jack
ML A302 Pump Spring – Mighty Lift ML55-II/ML55L Pallet Jack Hydraulic Unit
Explore our full catalog of Mighty Lift series parts to find everything you need for your repair or maintenance project.
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