Product Description
Manual hydraulic pump assembly for Uline Quick-Lift Pallet Trucks, direct replacement for SKU UL H-3812. Unit features a manual single-acting hydraulic pump, pre-filled reservoir, and lever-operated lift/lower function. Designed for direct compatibility with Uline Quick-Lift series manual pallet jacks.
Specifications
Hydraulic
| Service Fill Procedure | Hydraulic reservoir filled until fluid exits fill hole (air bleed by cycling control lever 10–12 times) |
Part Numbers
| OEM Part Number | UL H-3812 |
Frequently Asked Questions
Q: What is the UL H-3812 manual hydraulic pump assembly and which equipment does it fit?
A: The UL H-3812 is a manual single-acting hydraulic pump assembly for Uline Quick-Lift pallet trucks. It is a direct replacement for the original UL H-3812 and features a pre-filled reservoir, lever-operated lift and lower function, and is designed for manual pallet jacks without electric power.
Q: What is the correct hydraulic fluid fill level for the UL H-3812 pump assembly?
A: The UL H-3812 reservoir should be filled with hydraulic fluid until fluid exits the fill hole. Air must be bled by cycling the control lever 10 to 12 times to remove trapped air and ensure proper pump performance. Do not overfill the reservoir.
Q: What type of hydraulic fluid is compatible with the UL H-3812 pump assembly?
A: The UL H-3812 requires ISO 46 hydraulic fluid for manual pallet jacks. Use fluid meeting specifications for manual pallet jack applications. Do not mix different fluid brands or grades. The pre-filled reservoir may contain a factory fluid that should be drained and replaced if contaminated or if the jack has not been used for more than 12 months.
Q: What maintenance is required to extend the service life of the UL H-3812 pump assembly?
A: Inspect the pump assembly monthly for fluid leaks around the shaft seal and reservoir seams. Replace the hydraulic fluid every 2 to 3 years or if fluid appears dark or contains debris. Keep the fill hole and vent hole clear of dirt and dust. Store the pump in a dry location when not in use for extended periods.
Q: What symptoms indicate the UL H-3812 pump assembly needs replacement?
A: A failing pump assembly shows slow or no lift response despite repeated lever cycling, visible fluid leaks from the pump body or shaft seal, hissing or chattering sounds during lever operation, or loss of load-holding ability. These symptoms indicate internal pump wear or seal failure.
Q: What is the typical service life of the UL H-3812 pump assembly?
A: Under normal warehouse use with regular maintenance, the UL H-3812 pump assembly has a service life of 5 to 8 years. Heavy use, poor maintenance, contaminated fluid, or continuous high-temperature storage will reduce this lifespan. Routine fluid changes and leak inspections significantly extend component life.