Manitou.,oc Engineering CO.
4~ Periodically dismantle air cylinders
for cleaning and inspection.
5. Check control valves for proper•opera -•
tion. Improper•adjustment of valve
may cause clutch to drag.
6. With clutch fully applied, check that
full manifold air pressure is present.
7. Check air control detent
to
-~ke cer
taln
it
engages completely. Periodi-
cally check for wear and proper lubri-
cation.
8. Make certain the proper air control
valveisused for its proper function.
Different valves • are used for swing,
boom, and d~-,-. These valves are NOT
inter-changable.
D.
CHECK CLUTCHES DAILY AND BEFOREMAJOR
OR CAPACITY LIFTS ~ •
I. Always test clutches at start-up with
• several triallifts, or sllp clutch
against brake to assure dry friction
surfaces.
CAUTION:
REGUARDINGERECTION MACHINES-DONOT SLIP
A LOOSE CLUTCH UNTIL IT WILL PICK A KEAVY
~OAD. HEAT FROM SLIPPING CAUSES THE DRUM
FLANGE TO EXPAND TOWARD THE BRAKE
BAND.
THEEXPANSION COMPENSATES FOR A LOOSE
BRAKE. SHOULDTHEOPERATOR HOLD THELOAD
SUSPENDED FOR A SHORT TI/4E, THE DRUM WILL
COOL AND SHRINK AWAY FROM THE BRAKE BAND,
ALLOWING THE LOAD TO FALL.
2. Test llft to assure full clutch power
during ralnor before llfts requiring
cl0se to rated line pull.
E. CHECK FOR SYMPTOMS OF MALFUNCTION WHEN
OPERATING CLUTCH: ....
d. Shaft or plliowblock wear•
.
Signs of; excessive lining heating;
eccentric drummovement ; or clutch
dragging may
be:
• Out-of-r0und band.
b. Guides set wrong.
c. Drum or bearing wear.
e. Distorted drum.
f. Sticky cams.
g. Unmatched set of lining.
NOTE:
Clutch bands are numberedand should be
installed so the numbers match between the
sections. DO NOT mix sections from other
bands.
h.
i.
• J •
Pressure plates binding on driving
pins.
Improper adjustment.
Air cylinder andlive end of band
are located incorrectly on splined
shaft.
.
These symptoms should be investigated
at once to assure that the clutch is
in proper operating condition.
. ,• -.:..L
¢
N
FOLIO 935-2 2'3-78
395143
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