IMT Diamond Air DA435ELW, Service Manual, Page: 21 / 24

DA435ELW: 99900917: 5-5 19970508
5-5. COMPRESSOR DRIVE BELT
REPLACEMENT
CAUTION
BELT IS TENSIONED USING AN AUTOMATIC
TENSIONING DEVICE. REMOVE WITH
CARE.CAUTIONTO ENSURE THE ENGINE WILL
NOT ACCIDENTALLY START, DISCONNECT
POSITIVE BATTERY CABLE AT BATTERY.
To remove compressor belt:
1. Disconnect positive battery cable at battery.
2. Remove nut and lock washer from lower locking
bolt on idler tensioner flange.
3. Loosen center mounting bolt on idler tensioner
approximately 1/2 turn.
4. Using a pipe wrench or equivalent tool, turn
tensioner body slightly to free locking bolt from
tension. If tensioner body cannot be moved using a
pipe wrench, loosen bolt by another 1/2 turn.
Remove locking bolt and slowly release tension on
belt. Remove belt.
NOTE
DO NOT LOOSEN OR REMOVE COMPRESSOR
MOUNTING BOLTS. PULLEY MISALIGNMENT MAY
RESULT.
To install belt (after following above procedure):
1. Mount belt into pulley grooves and over idler
pulley.
2. Using a pipe wrench or suitable tool, turn idler
body to realign locking slot in idler flange with
locking hole. Insert locking bolt and tighten before
releasing idler body. Tighten center mounting bolt.
NOTE
ENSURE THAT BOTH BELT STRANDS ARE
RUNNING PROPERLY IN PULLEY GROOVES.
5-6. CLUTCH REPLACEMENT
CAUTION
CLUTCH FAILURE MAY BE DUE TO A LEAKING
CHECK VALVE. MAKE CERTAIN THAT THE CHECK
VALVES ARE FUNCTIONING PROPERLY BEFORE
INSTALLING THE NEW CLUTCH. THE CHECK
VALVES MAY BE CHECKED BY PRESSURIZING
THE TANK AND SHUTTING OFF THE
COMPRESSOR. THERE SHOULD BE NO AIR
ESCAPING FROM THE UNLOADER VALVE. IF
THERE IS AIR ESCAPING, THE CHECK VALVES
ARE FAULTY.
The clutch assembly can be removed while the
compressor is still on the welder. The following
procedure should be used.
NOTE
DO NOT LOOSEN OR REMOVE COMPRESSOR
MOUNTING BOLTS. PULLEY MISALIGNMENT MAY
RESULT.
WARNING
ATTEMPTING TO START THE ENGINE WHILE THE
CLUTCH IS BEING REMOVED WILL CAUSE
SERIOUS INJURY.
1. Remove compressor drive belt. Follow
compressor drive belt replacement procedure
Section 5-5 for proper removal. Failure to do so
could result in serious injury.
CAUTION
BELT IS TENSIONED USING AN AUTOMATIC
TENSIONING DEVICE. REMOVE WITH CARE.
2. Electrically engaging the compressor clutch will
make for easier removal of clutch pulley.
CAUTION
TO ENSURE THE ENGINE WILL NOT
ACCIDENTALLY START, DISCONNECT POSITIVE
BATTERY CABLE AT BATTERY.
3. Remove access panel at rear of compressor,
below radiator. Open clutch coil wire at in-line
insulated connector.
CAUTION
SPRING TENSIONER TENSION MUST BE
RELEASED BEFORE ATTEMPTING TO REMOVE
PULLEY. FAILURE TO DO SO COULD RESULT IN
SERIOUS INJURY. FOLLOW COMPRESSOR DRIVE
BELT REPLACEMENT PROCEDURE SECTION 5-5.
CAUTION
DO NOT USE A WHEEL PULLER ON THE OUTER
RIM OF THE PULLEY. THIS CAN RESULT IN
DAMAGE TO THE CLUTCH BEARING.