Product Description
The Uline H-1043-B138 is a hardened steel ball base seat component for manual pallet truck hydraulic pump assemblies. This direct replacement part works with a 3/4 inch steel ball to form the hydraulic release valve mechanism that controls mast lowering speed. Compatible with Uline H-1043, H-1193, H-1366, and H-1517 series manual pallet jacks. Engineered for reliable performance in high-stress hydraulic environments.
Specifications
Compatibility
| Compatible Equipment Models | Uline H-1043, H-1193, H-1366, H-1517 pallet trucks |
| Assembly Location | Hydraulic pump assembly, position 22 in pump diagram |
Functional
| Associated Components | Works with steel ball H-1782-B139 (3/4 inch) in release valve assembly |
| Material | Hardened steel |
Part Numbers
| Direct Replacement Part Number | H-1043-B138 |
| Cross-Reference Part Numbers | H-1782-B138 (equivalent part number for H-1043, H-1193, H-1366, H-1517 series) |
| Manufacturer Part Number | B138 |
Frequently Asked Questions
Q: What is the H-1043-B138 ball base component and where is it located?
A: The H-1043-B138 is the ball base or seat component installed in the hydraulic pump assembly. It works with a 3/4 inch steel ball to form the hydraulic release valve mechanism that controls the lowering speed of the mast.
Q: Which Uline pallet jack models accept the H-1043-B138 ball base component?
A: The H-1043-B138 is compatible with Uline models H-1043, H-1193, H-1366, H-1517, and related series manual pallet jacks. Cross-reference part number H-1782-B138 is equivalent for these same model ranges.
Q: What material is the H-1043-B138 ball base made from?
A: The ball base is manufactured from hardened steel to withstand the contact stress and wear from repeated valve cycling. It functions as an internal seat in the oil-immersed hydraulic environment.
Q: What symptoms indicate the H-1043-B138 ball base or seat is worn?
A: Wear symptoms include uncontrolled mast lowering speed that cannot be adjusted, oil leakage from the pump area, or a hissing sound during the lowering cycle. These indicate the valve seat no longer seals properly against the ball.
Q: How does the H-1043-B138 work with the steel ball to control lowering?
A: The H-1043-B138 ball base provides a machined surface seat. The 3/4 inch steel ball rests on this seat. When the operator opens the hydraulic valve, oil flows around the ball. The ball position against the seat controls the oil flow rate and thus the controlled lowering speed of the load.