TUBE 3711164 - Caterpillar

Inspect
Park the machine on level ground. Lower the dozer blade to the ground. Move the transmission control to the NEUTRAL position and engage the parking brake. Shut off the engine.
Turn the battery disconnect switch to the OFF position.
Open the engine access doors on the right side.
Illustration 1 g02283093
Front and left side view
(1) Idler pulley (reference only)
(2) Belt tensioner
(3) Alternator (reference only)
(4) Compressor for the Air conditioner (reference only)
(5) Serpentine belt
Illustration 2 g06114636
(A) New belt
(B) Worn belt
Inspect the condition of serpentine belt (5). Over time the belt ribs will lose material (C). The space between the ribs will increase (D). The loss of material will cause the pulley sheave to contact the belt valley. This will lead to belt slippage and accelerated wear (E). Replace the belt if the belt is worn or frayed.
Close the engine access doors.
Turn the battery disconnect switch to the ON position.Replace
Park the machine on level ground. Lower the dozer blade to the ground. Move the transmission control to the NEUTRAL position and engage the parking brake. Shut off the engine.
Turn the battery disconnect switch to the OFF position.
Open the engine access doors.
Turn belt tensioner (1) to release the tension from the belt with a square drive.
Remove the belt.
Install the new belt.
Close the engine access doors.
Turn the battery disconnect switch to the ON position.