Engine Fan Belt & Air Conditioner Compressor Belt - JLG sky trak mmv Service Manual

General Information, Specifications and Maintenance
2.13.8 Engine Fan Belt & Air Conditioner
Compressor Belt
1 000
MS21902
a. Engine Fan Belt
1. Ground the attachment, place the travel select lever
in the [N] NEUTRAL position, place the neutral lock
lever in the [N] NEUTRAL LOCK position, engage
the parking brake switch and shut the engine OFF.
Allow engine to cool.
2. Place an Accident Prevention Tag on both the
ignition switch and steering wheel, stating that the
vehicle should not be operated. (Refer to Section
1.5, Accident Prevention Tag Usage .)
3. Open the engine cover.
4. Inspect the engine fan belt. Replace if cracked or
frayed.
5. This engine is equipped with an automatic belt
tensioner (1). Insert a 1/2" drive ratchet into the
square hole (2) in the tensioner, and rotate the
ratchet up to remove tension from the belt. Remove
the fan belt (3).
6. Inspect the fan belt and tensioner bearing. Inspect
the fan belt. Replace if cracked or frayed. Spin the
bearing, and check for resistance or rough spots in
bearing travel.
7. Spin the fan and check for wobble or excessive play.
Maximum play should be 0.006 inch (0,15 mm).
8. To install the fan belt, position the belt over the
alternator (4), fan (5) and crankshaft (6) pulleys.
While holding the tensioner up, slide the belt over the
water pump pulley (7).
9. Close the engine compartment cover.
2.40
1
2
4
OS0880
b. Air Conditioner Compressor Belt
1. Ground the attachment, place the travel select lever
in the [N] NEUTRAL position, place the neutral lock
lever in the [N] NEUTRAL LOCK position, engage
the parking brake switch and shut the engine OFF.
Allow engine to cool.
2. Place an Accident Prevention Tag on both the
ignition switch and steering wheel, stating that the
vehicle should not be operated. (Refer to Section
1.5, Accident Prevention Tag Usage .)
3. Open the engine cover.
4. Inspect the air conditioner compressor belt (8).
Replace if cracked or frayed.
5. Check the tension of the compressor belt (8) midway
between the fan pulley (9) and the compressor
pulley (10). The belt deflection should be 3/16" (4,8
mm) with an applied force of 5-1/2 lb (2,5 kg).
6. Adjust the tension on the belt by loosening the bolt
(11) on the belt tensioning pulley (12). Reposition
the pulley and securely tighten the bolt.
7. Recheck the tension and readjust if needed.
8. Close the engine compartment cover.
7
6
5
3
MT1840
Model MMV Rev. 12/04