Product Description
MO 12E137 is a Mobile OEM return spring designed for handle return and valve control in the hydraulic assembly of Mobile ECO I-55 manual pallet jacks. This component ensures proper pump operation and handle positioning in pallet handling equipment.
Compatibility: Fits pallet jacks made by Mobile, model ECO I-55. Alternate model: ECO I55; ECO I 55. SKU: MO 12E137
Specifications
Part Numbers
| Manufacturer Part Number | MO 12E137 |
| OEM Part Number | MO 12E137 |
| Cross-Reference Part Numbers | ML12E137 |
Frequently Asked Questions
Q: What is the function of the MO 12E137 return spring?
A: The MO 12E137 is a return spring in the Mobile ECO I-55 hydraulic assembly that controls handle positioning and valve return after each lift cycle. When the operator releases the handle, the spring resets the pump valve to neutral, allowing the jack to descend smoothly and safely.
Q: What symptoms indicate the MO 12E137 spring needs replacement?
A: Signs of spring failure include: handle does not return to neutral position after releasing, jack descends slowly or sticks partway, hydraulic pressure remains in the system when handle is released, or handle requires excessive force to operate. Any of these conditions requires immediate spring replacement.
Q: What is the material and expected lifespan of the MO 12E137 spring?
A: The MO 12E137 is a hardened steel spring engineered to withstand thousands of compression cycles. Expected lifespan ranges from 5 to 10 years depending on usage frequency and operating environment. Springs used in high-cycle operations (more than 50 lifts per shift) may require replacement sooner.
Q: Can the MO 12E137 spring be reused if removed for repairs?
A: Springs should not be reused if removed for more than a few days. Once removed, springs lose tension and may not return to original specifications. Additionally, if the spring was removed due to failure or loss of tension, reusing it will result in the same problem recurring. Install a new OEM spring.
Q: Is the MO 12E137 compatible with other Mobile model pallet jacks?
A: The MO 12E137 is engineered specifically for the Mobile ECO I-55 hydraulic assembly. Springs are calibrated to match the pump valve specifications of each model. Do not attempt to use this spring on other Mobile models or competitors units, as spring rate and dimensions must match exactly.
Q: What environmental factors affect return spring performance?
A: Extreme cold reduces spring tension and response speed. Heat above 140 degrees Fahrenheit can reduce spring strength and cause permanent deformation. Prolonged exposure to moisture can cause corrosion and spring brittleness. Store equipment in climate-controlled areas when possible and replace springs showing rust or discoloration.