ARM AS 1285201 - Caterpillar

Accidental machine starting can cause injury or death to personnel working on the machine.To avoid accidental machine starting, turn the battery disconnect switch to the OFF position and remove the key. If the machine is not equipped with a battery disconnect switch, disconnect the battery cables from the battery and tape the battery clamps.Place a do not operate tag at the battery disconnect switch location to inform personnel that the machine is being worked on.
Illustration 1 g03322538Belt (1) drives the alternator and the air conditioner.
Park the machine on level ground. Move the transmission control to the NEUTRAL position and engage the parking brake. Shut off the engine.
Remove the right engine compartment cover. Replace
Replace the belt if any of the following conditions exist:
excessive cracking
excessive wear
excessive damage
Turn the battery disconnect switch to the OFF position.
Release the tension on serpentine belt (1). Insert a 12.7 mm (0.50 inch) ratchet into the square hole in the belt tightener (2) and pry the belt tightener in a counterclockwise direction.
Remove the belt from the pulleys.
Install the new belt around the pulleys.
When you release the tension off the belt tensioner, the belt tensioner will automatically adjust the belt to the correct position. Recheck the belt tension.
Turn the battery disconnect switch to the ON position.
Close the right engine compartment cover. Note: Note: If a new belt is installed, recheck the belt adjustment after 30 minutes of operation.