Product Description
Atlas AT Z-1139 is an OEM adjustment screw designed for Atlas Zenith Type 9 manual pallet jacks, utilized as the hydraulic pump base adjustment component. Compatible exclusively with designated Atlas Zenith hydraulic units and frames. No active cross-reference, interchange, or supersession part numbers are documented in current manufacturer resources.
Compatibility: Fits pallet jacks made by Atlas, model Zenith. SKU: AT Z-1139
Specifications
Mechanical Specifications
| Mounting Pattern | Fits original Atlas Zenith Type 9 pump base thread receptacle |
| Pressure Rating | Component functions as a mechanical adjustment screw; does not carry pressurized load |
Part Numbers & Compatibility
| Manufacturer Part Number | AT Z-1139 |
| OEM Part Number | Z-1139 |
| Compatible Models | Atlas Zenith (Type 9) Frame, Atlas Zenith (Type 9) Hydraulic Unit |
Frequently Asked Questions
Q: What is the AT Z-1139 adjustment screw used for?
A: The AT Z-1139 is an OEM adjustment screw that regulates hydraulic pump pressure calibration on Atlas Zenith Type 9 manual pallet jacks. It threads into the pump base and controls the relief pressure threshold.
Q: Which Atlas Zenith models accept the AT Z-1139?
A: The AT Z-1139 is designed exclusively for Atlas Zenith Type 9 hydraulic units and frames. It fits the pump base thread receptacle on all Type 9 equipped manual pallet jacks. This is not a universal adjustment screw; compatibility is limited to this specific hydraulic platform.
Q: Are there cross-reference or supersession part numbers for the AT Z-1139?
A: No active cross-reference, interchange, or supersession part numbers are documented in current Atlas manufacturer resources. The AT Z-1139 is the sole OEM specification for this pump base adjustment component on Zenith Type 9 units.
Q: What happens if the AT Z-1139 is missing or damaged?
A: Loss or damage to this screw prevents proper pressure calibration. The pump may generate excessive relief pressure, causing hard lifting action or intermittent pressure loss, or insufficient pressure, resulting in weak lifting force.
Q: What material and specifications does the AT Z-1139 have?
A: The AT Z-1139 is a precision-machined steel adjustment screw with thread specifications matching the pump base receptacle. It functions as a mechanical regulator and does not require electrical connection or calibration tools beyond standard adjustment.