Product Description
The Magnum MG 135 is a factory-specification cartridge-style hydraulic pressure relief valve designed for Magnum Handjak 55 and Model 5000 manual pallet jack hydraulic units. Machined from steel with a factory elastomeric nitrile rubber seal, this valve protects your hydraulic system by limiting maximum pressure and preventing over-pressurization during load holding or emergency conditions. Rated for ISO VG 32 hydraulic oil operation. Mounts directly in the hydraulic unit block with no cross-reference part numbers available.
Specifications
Dimensional
| Mounting Type | Cartridge-style in hydraulic unit block |
Hydraulic
| Flow Path | 2-way direct-actuated with spring return |
| Seal Type | Hydraulic-grade elastomeric O-ring (Magnum factory specification) |
| Operation Fluid | ISO VG 32 hydraulic oil |
Material
| Construction Material | Machined steel |
| Seal Material | Nitrile rubber (Buna-N) per Magnum hydraulic specification |
Part Numbers
| Part Number | MG 135 |
| Cross Reference Part Numbers | No cross-reference part numbers available |
| Compatible Models | Magnum Handjak 55, Model 5000 hydraulic unit |
Frequently Asked Questions
Q: Which Magnum pallet jack models use the MG 135 pressure relief valve?
A: The MG 135 is an OEM hydraulic pressure relief valve for Magnum Handjak 55 and Model 5000 hydraulic units. This is a factory-specification cartridge-style valve that mounts directly in the hydraulic block.
Q: What material is the MG 135 valve constructed from?
A: The MG 135 is machined from steel and features a factory elastomeric seal manufactured to Magnum hydraulic specification. The seal material is nitrile rubber (Buna-N) rated for ISO VG 32 hydraulic oil operation.
Q: Are there alternative part numbers or cross-references for the MG 135?
A: The MG 135 is an OEM Magnum part with no published cross-reference part numbers from other suppliers. When ordering, always specify the exact SKU MG 135 to ensure you receive the correct cartridge-style valve for Magnum Handjak 55 or Model 5000 hydraulic units.
Q: What is the function of the MG 135 valve in a pallet jack hydraulic system?
A: The MG 135 is a 2-way direct-actuated pressure relief valve with spring return. It protects the hydraulic system by limiting maximum pressure in the Handjak 55 or Model 5000 unit, preventing over-pressurization and component damage during load holding or emergency conditions.
Q: What symptoms indicate the MG 135 valve is failing?
A: Signs of MG 135 failure include hydraulic pressure loss, inability to lift or hold load, sluggish lowering, system leakage from the valve seat, or erratic pressure fluctuations. If your Magnum Handjak 55 or Model 5000 exhibits these symptoms, the pressure relief valve may need replacement.
Q: Does the MG 135 valve work with hydraulic oils other than ISO VG 32?
A: No. The MG 135 is engineered and tested for ISO VG 32 hydraulic oil only. Using a different oil grade will compromise seal performance, valve response, and system reliability. Always maintain the correct ISO VG 32 specification in your Magnum hydraulic unit.