Mighty Lift O-Ring for ML55-II & ML55L Pallet Jacks - ML55-II & ML55L
ML A331
Guaranteed Fit. If it doesn’t fit equipment that matches the listing on this page, we’ll exchange or refund it: no restocking fee, return shipping on us. How it works
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Compatibility
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Product Description
O-Ring
Compatibility: Fits pallet jacks made by Mighty Lift, model ML55-II & ML55L. Alternate model: ML55II & ML55L; ML55 II & ML55L. SKU: ML A331
Frequently Asked Questions
Q: Which Mighty Lift pallet jack models use the ML A331 O-ring?
A: The ML A331 O-ring fits Mighty Lift manual pallet jacks in models ML55-II and ML55L. Verify your equipment matches these designations, including alternate numbering ML55II and ML55 II, before ordering.
Q: What material is the ML A331 O-ring constructed from?
A: The ML A331 is manufactured from elastomer material designed to seal hydraulic connections. The material provides compression resistance and maintains flexibility across the operating temperature range of the pallet jack.
Q: How do I know if the ML A331 O-ring needs replacement?
A: Replace the ML A331 if hydraulic fluid seeps from sealed connections, the jack loses pressure during operation, or the O-ring shows visible cracking, hardening, or permanent compression. These conditions indicate elastomer degradation.
Q: Is the ML A331 a routine maintenance item?
A: The ML A331 is not a scheduled replacement item. However, elastomer O-rings degrade over time, especially in cold storage or high-use environments. Inspect annually and replace if hardening or fluid leakage develops.
Q: Can I reuse the ML A331 after removal?
A: No. Once removed, elastomer O-rings lose their compression set and cannot maintain a reliable seal. Always use a new ML A331 when re-sealing connections. Reusing a worn O-ring can cause fluid leakage and system failure.
Q: What if I cannot find the ML A331 listed for my pallet jack?
A: Confirm your pallet jack model matches ML55-II, ML55L, ML55II, or ML55 II before assuming incompatibility. Alternate model designations are common across Mighty Lift documentation. Cross-reference your equipment serial number or documentation with these model numbers.