~r) '~ MAN!TOWOC ENGINEERING
CO.
.llanitowoc. II'isconsiu
54220
DRUM BRAKE ,MAINTENANCE
ALL MODELS
GENERAL INFORMATION :
The following procedure offers a system-
atic maintenance program for the efficient
operation of drum brakem Adherence to the
following procedures will aid in the re-
duction of costly down time.
NOTE:
For specific adjustment procedures, speci-
fications, etc., refer to the appropriate
adjustment folio or shop manual.
CAUTION:
LOWER WEIGHT BALL AND LOAD BLOCK TO GROUND
BEFORE WORKINC ON BRAKES OR HARM TO PER-
SONNEL MAY RESULT.
A. CIIECK LATCH MECHANISM:
i.
.
Latch areas should hold pedal securely
in applied position. If excess wear
is apparent the latch should be re-
placed.
Check to makecertain that pedal locks
(if present)allow for smooth travel
of the brake pedal and also allow the
brake pedal to be latched without
interference. Make certain lock oper-
ates and HOLDS.
B. CHECK LINKAGE:
i. All pins should be free and lubricated.
2. Levers, rods, pedals, etc., should not
be bent or distorted.
.
With brakes operating, observe for
lost motion due to wear. Also check
for obstructions or interference from
other components.
4.
Check toggle action at live end of
linkage. Adjustment folios give de-
sired toggle dimensions for new lin-
ings: deviation from this dimension
can result in decreased braking power.
If dimension is not per adjustment
folio check linkage for sheared keys,
worn or incorrect parts.
C. CHECK BAND SHAPE AND LINING CONDITION
WITH BRAKE RELEASED:
i.
Clearance between lining and drum
flange should be as stated in adjust-
ment folio. There should be no sharp
bends or tight points.
2. Proper clearance should be held by
guides. Check spring tension.
CAUTION:
GUIDES MUST NOT PREVENT LINING FROM CON-
TACTINC DRUM FLANGE.
3. Take special care that live end of band
does not contact drum first or that it
does not drop away excessively. This
will result in smoother brake action.
4. Watch band and linkage members-espe-
cially at end connections-for cracks.
5. Make certain lateral guides prevent
side ways movement of the brake bands.
.
Inspect band and lining for presence
of grease, oil, or other contaminants.
If contamination is present find source
and remedy. Remove band for inspection
and cleaning. Replace lining if neces-
sary.
NOTE:
Manitowoc "ORIGINAL EQUIPMENT" linings are
chosen with extreme care. Performance
tests under controlled conditions are com-
bined with years of field experience be-
fore a given form of lining is accepted
for use.
WARNING:
SUBSTITUTION OF OTHER LININGS WHICH ARE
CLAIMED TO BE "JUST AS GOOD" COULD BE A
RISKY UNDERTAKING AND COULD RESULT IN A
DROPPED LOAD
2-2-78 DRUM BRAKE MAINTENANCE FOLIO 932-1
395143
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