5M460C, 5M471B, and 5M472C
3
Westward Operating Instructions and Parts Manual
Hydraulic Crane Jacks
Symptom
Possible Causes
Corrective Action
Jack will not lift load
1. Release valve not tightly closed
2. Overload condition
1. Ensure release valve tightly closed
2. Remedy overload condition
Jack lift but not maintaining
pressure
1. Release valve not tightly closed
2. Overload condition
3. Hydraulic unit malfunctioning
1. Ensure release valve tightly closed
2. Remedy overload condition
3. Replace unit
Jack will not lower after
unloading
1. Reservoir overfilled
2. Linkages binding
1. Drain fluid to proper level
2. Clean and lubricate moving parts
Poor lift performance
1. Fluid level low
2. Air trapped in system
1. Ensure proper fluid level
2. Follow Bleeding/Venting Trapped Air
procedure
Will not lift to full height
Fluid level low
Ensure proper fluid level
Troubleshooting Chart
Warranty
LIMITED ONE-YEAR WARRANTY
Should this product fail to perform satisfactorily due to a defect or poor workmanship within ONE YEAR from the
date of purchase, return it to the place of purchase and it will be replaced, free of charge. Incidental or consequential
damages are excluded from this warranty.
