CM-ET Series 653 - Manual (Page 13)

10
Troubleshooting Chart
Symptom Possible Cause(s) Corrective Action
Hoist is hard to operate 1. Load chain worn long to 1. Check chain, (See page 6) and replace if worn
in either direction. gauge, thus binding between excessively.
liftwheel and chain guide roller.
2. Load chain rusty, corroded or 2. Clean chain by tumble polishing or using a
clogged with foreign matter non-acid or non-caustic type solvent. Check chain
such as cement or mud. for gouges, damaged or bent links. Lubricate with
Lubriplate
® Bar and Chain Oil 10-R (Fiske Bros.
Refining Co.) or equal lubricant.
3. Bushings or liftwheel rollers 3. Disassemble and clean liftwheel rollers and
clogged with matter such as bushings in gear cover and side plate (gear side).
cement or dust. Any parts worn excessively should be replaced.
4. Lever binding. 4. Clean by removing any foreign matter which may
be between the lever and the brake cover.
5. Brake parts corroded or 5. Disassemble brake and clean thoroughly (by wiping
clogged with foreign matter. with a cloth - not by washing in a solvent). Replace
discs if too gummy, worn or scored. Keep discs and
brake surfaces clean and dry.
6. Liftwheel pockets clogged with 6. Clean out pockets and use if not worn excessively.
foreign matter or worn excessively Replace liftwheel if pockets are worn.
causing chain to bind between
liftwheel and chain guide rollers.
7. Liftwheel twisted or bent - gear 7. Excessive overload had been applied. Replace
teeth bent. damaged parts.
8. Check washer not in correct 8. Reposition check washer (See page 7).
position.
Hoist is hard to operate 1. Brake adjusting nut is too tight. 1. See BRAKE ASSEMBLY, page 7.
in down direction.
2. Brake parts corroded or clogged 2. Disassemble brake and clean thoroughly
with foreign matter. (by wiping with a cloth - not by washing in a
solvent). Replace discs if too gummy, worn or
scored. Keep discs and brake surfaces clean
and dry.
3. Chain binding. 3. Check chain, (See page 6) and replace if worn
excessively. Clean chain by tumble polishing or
using a non-acid or non-caustic type solvent. Check
chain for gouges, damaged or bent links. Lubricate
with Lubriplate
® Bar and Chain Oil 10-R (Fiske
Bros. Refining Co.) or equal lubricant.
Hoist is hard to operate 1. Chain binding. 1. Check chain, (See page 6) and replace if worn
in up direction. excessively. Clean chain by tumble polishing or
using a non-acid or non-caustic type solvent. Check
chain for gouges, damaged or bent links. Lubricate
with Lubriplate
® Bar and Chain Oil 10-R (Fiske
Bros. Refining Co.) or equal lubricant.
2. Overload. 2. Reduce load or use correct capacity unit.