Lull 644E-42 Operation Manual - Manual (Page 125)

General Maintenance
123 Model 644E Origin 3/04
Engine Fan Belt Check
(1000 Hour Intervals)
1. Level the vehicle, ground the
attachment, place the travel
select lever in the (N) NEU-
TRAL DETENT position, engage the parking brake switch and shut off the
engine.
2. Unlatch and open the engine cover.
3. Inspect the fan belt (4). Replace if cracked or frayed.
4. This engine is equipped with an automatic belt tensioner (5). Inspect the
tensioner bearing. Spin the bearing and check for rough spots under hand
pressure.
5. Spin the fan and check for wobble or excessive play. Maximum play should
be .006 inch (0,15 mm).
6. To install the fan belt (4); first position the belt over the fan pulley (6), crank-
shaft pulley (7), alternator pulley (8) and onto the tensioner pulley (5) then,
while holding the tensioner (5) toward the center of the engine, slide the
belt over the water pump pulley (9). Release the tensioner to apply tension
on the belt. To hold the tensioner toward the center of the engine, insert a
3/8" breaker bar into the square hole (10) in the tensioner arm.
7. Close and latch the engine cover.
7. Engine Fan Belt
1000
OH2690
OS08802
OU0240
4
5
6
7
8
9
10