Table 4-1. Troubleshooting - continued
PROBLEM
POSSIBLE CAUSE
REMEDY
Brake will not
1. Control linkage out
Adjust control linkage.
Hold
of adjustment.
2. Worn brake lining.
Replace brake lining.
3. Brake lining wet.
Replace brake lining.
Brake will not
1. Control linkage out of
Adjust control linkage.
Release
adjustment.
2. Broken brake lining.
Replace brake lining.
3. Grease on brake
Replace brake lining.
lining.
4. Grease on brake
Replace brake lining.
lining.
No output from
Broken or stripped
Disassemble drive assembly and replace
drive assembly
drive gears.
any defective parts.
Excessive noise
1. Worn bearings on
Replace any worn bearings.
shaft or in drive
assembly.
2. Broken or worn gears
Replace broken or worn gears.
in drive assembly.
HOISTING DRUM
Clutch will not
1. Insufficient air pres-
Inspect entire air line installation for
engage
sure.
any restrictions or leaks which could
decrease the air supply to the clutch.
Check operating valve for full opening.
If operating in cold weather, the air
lines may be restricted due to freezing
of the moisture in the air system. The
addition of Denatured alcohol or Ethy-
lene Glycol in the air receiver will eli-
minate this problem. Avoid the use of
all rust inhibitors or commercial anti-
freeze.
2. Ruptured tube.
Replace tube.
3. Malfunctioning quick
Rebuild or replace quick release valves.
release valves.
4-12
