ML-BP-100 Hydraulic Pump For Mighty Lift ML55 Pallet Jack
SKU: ML BP 100
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Product Description
The ML-BP-100 pump is a complete hydraulic pump assembly for the Mighty Lift ML55 manual pallet jack. This pump unit is installed in the jack’s hydraulic housing to restore lifting and lowering functions.
It is an aftermarket pump built to OEM specifications. It features a robust steel body, integrated piston-cylinder mechanism, and a pre-set pressure relief valve. The assembly comes ready to replace the original ML55 pump (no modification required).
Note: Hydraulic fluid is not included; reuse or refill with appropriate jack oil during installation.
Cross References
This Mighty Lift hydraulic pump may also be identified by part numbers:
Product Specifications
Features of this Product
Direct‑fit to Mighty Lift ML55 jacks: the ML‑BP‑100 pump matches original mounting points, linkages, and is a seamless swap—no modifications needed
Heavy-duty build: high‑strength cast iron/steel housing with hardened steel piston, ram, and valves engineered for continuous load service
Integrated pressure relief valve: factory‑calibrated overload bypass opens around 3,000 psi to prevent damage under excessive load
Restores original lift performance: the pump rebuild returns jack to full lift height and approximately 5,500 lb rated capacity with smooth operation
Precision‑sealed assembly: includes pre‑installed seals (O‑rings, U‑cups), air‑tested to eliminate leaks and ensure long-term pressure retention
Standard hydraulic fluid: compatible with ISO 32 grade hydraulic oil used in original ML55 units—no system changes necessary.
Enhanced reliability: meets or exceeds OEM specs with potential improvements in seal material and finish; comes with full warranty
Complete drop‑in unit: supplied fully assembled—pump core, piston, valve block, relief spring—all internal parts included; no rebuilding or reuse of old parts required
Warranty Information
1-year limited manufacturer’s warranty. This warranty covers any manufacturing defects or failures under normal use within one year of purchase.
Our Return & Refund Policy
Our standard 30-day return policy applies to this pump. Returns must be in new, unused condition with original packaging and proof of purchase. Non-defective returns, such as ordering in error, will incur a 20% restocking fee. For return instructions and full conditions, visit our Return Policy page.
Not Sure Will This Pump Fit Your Equipment?
Reach out via phone at 832-239-5393 or 1-800-210-8170, email info@palletjackson.com, or live chat on our website. We’re available Monday–Friday, 9 am–6 pm EST to help ensure you get the right replacement part for your equipment.
Frequently Asked Questions
Q: What is the maximum hydraulic pressure this pump can generate?
A: The ML-BP-100 pump generates up to 3000 PSI, enough to lift the ML55’s rated load. A built-in relief valve prevents the pressure from exceeding this level for safe operation.
Q: Does this replacement pump have an overload protection valve?
A: Yes. It includes a factory-set pressure relief valve that activates if the jack is overloaded, diverting oil to prevent damage. You may hear a hiss or notice the lift stop.
Q: What type of hydraulic fluid should I use with this pump?
A: Use ISO VG32 hydraulic jack oil or equivalent. Avoid motor or brake fluids. Fill to the proper level with forks lowered to ensure smooth, reliable operation.
Q: How long can I expect this hydraulic pump to last?
A: With normal use and proper maintenance, the pump can last 5+ years. Durable seals and quality materials help it match OEM lifespan if oil levels are maintained and overload is avoided.
Q: Does the ML-BP-100 pump come with all necessary seals and gaskets?
A: Yes. The pump is fully assembled with all internal seals and gaskets pre-installed. No separate seal kit is needed for the pump itself.
Q: What materials and design features make this pump durable?
A: The pump uses a cast steel housing, precision-machined components, and hardened steel valves. High-quality seals resist abrasion and breakdown, while internal coatings reduce corrosion and wear.
Q: How much does the ML-BP-100 pump assembly weigh?
A: The pump weighs approximately 12–15 lbs (5.5–7 kg). Its compact yet heavy-duty build reflects its rugged cast steel construction.
Q: How does the pump hold a load once lifted?
A: Internal check valves trap hydraulic fluid under pressure, locking the load in place. These valves keep the forks raised until the release is activated, ensuring secure load holding.
Q: Is this pump assembly suitable for cold environments or freezer use?
A: Yes, if used with low-temp hydraulic oil (e.g., ISO VG22). It performs down to -20°F, though operation may be slower. Proper oil ensures functionality in cold storage settings.
Frequently Bought Together
Customers who bought the ML-BP-100 hydraulic pump also commonly purchase:
Browse our Mighty Lift parts catalog to find other components and repair kits for the ML55 pallet jack, including wheels, handles, and more.
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