1. Manual Controls - Check all manual controls for proper operation.
2. Electrical Connection - Check for worn or frayed wires, for loose connections and for damage to or improper operation of push button assembly
3. Limit Switch - Check the upper and lower limit switch by running the hook without load and at the slowest speed obtainable, to the maximum up and maximum down positions. Then test with increasing speeds up to maximum. The switch should shut the hoist off before the bottom block contacts the rod or weight type limit switch at the upper extreme. 1 1/2 Wraps of rope should remain on the drum at the shut-off point at the lowest extreme. If adjustment is necessary refer to manual.
4. Hook - Check for cracks or deformation, Check for damaged or missing latch, a bent or twisted hook indicates overloading or abuse of unit. Other load bearing components o0f the hoist or trolley should be inspected if overloading is apparent or suspected. the bottom hook should swivel freely.
5. Wire Rope - Check for proper seating in drum grooves. Check for wear, unstranding, fraying, kinks or broken wires in wire rope & end connections.
6. Hook Drift - With a load the hook should stop promptly when the push button is released. Hook drift of more than 2 inches indicates that either one or both of the hoist brakes is malfunctioning. Refer to manual for adjustment or repairs.
7. Unusual Conditions - Excessive noise, oil leaks, etc. should be investigated.
CAUTION!!!! DO NOT OPERATE THE HOIST IF ABOVE INSPECTION INDICATES THAT MAINTENANCE IS NEEDED
Source: Superior Fabrication Company LLC (Community Member)