MANITOWOC ENGINEERING CO.
division of The ~VIanitowoc Company, Inc.
Alanitowoc, Wisconsin 54"220
BOOM HOIST MAINTENANCE
ALL MODELS
GENERAL INFORMATION
The following procedure offers a systematic
maintenance program for the efficient op-
eration of the boom hoist. Adherence to the
following procedures will aid in the re-
duction of costly downtime.
NOTE:
For specific adjustment procedures, speci-
fications, etc., refer to the appropriate
adjustment folio or shop manual.
CAUTION:
LOWER BOOM TO GROUND OR SUPPORT ON BLOCK-
ING BEFORE PROCEEDING WITH MAINTENANCE IN-
SPECTION AND SERVICING.
WEEKLY CHECKS:
I. Check for proper cam and roller clear-
ance with brake applied. Check roller
position with clutch applied.
2. Inspect all control linkage for proper
operation. Controls should not be
binding. Check pins and linkage for
proper lubrication.
3. Inspect bevel gear for wear and proper
lubrication.
4. Check for presence of oil, grease, or
other contaminants on clutch or brake
linings. If contamination is present
find source and remedy. Remove band
for inspection and cleaning. Replace
lining if necessary.
MONTHLY CHECKS:
I. Check tightness of bolts on bevel gears
and all spanner nuts on boom hoist
drive shaft.
2. Check spider teeth for wear.
3. Check lining teeth for wear.
4. Check all control linkage for wear or
lost motion. Check boom hoist center-
ing control.
5. Remove cover and inspect worm and
wheel for wear.
6. Inspect fit and tightness of brake drum
on shaft.
7. Check interference fit of pressure
plate on driving pins.
8. Check for water in housing.
9. Check oil seals on drum shaft and bot-
tom of worm for leaks.
I0. Check Boom Hoist Auxiliary brake.
Make certain linkage is free and ad-
justed correctly.
ii. Check pawl mechanism (if so equipped)
for proper operation and adjustment.
12. Inspect brake bands: look for out-of-
round band, cracks, correct adjust-
ment.
13. Check planetary oil level (if appli-
cable).
14. Check spring condition in air cylinder
on brake band (if applicable).
15. Check air lines for abrasion, swelling
or kinking. Use soap suds to check
for leaks.
YEARLY CHECKS:
i. Check for bearing problems: Roll shafts
or wheels by hand. Any indication of
roughness is cause for further tests or
replacement of bearing(s).
2. Check clutch cams, pressure plate pins,
other components for wear or cracks.
3. Check mounting bolts for proper torque
and for signs of wear.
NOTE:
Any problem no matter how small, should be
taken care of immediately. Ignoring a
small problem can result in a very big and
expensive problem.m
2-2-78 BOOM HOIST MAINTENANCE
FOLIO
933-1
395143
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