PIN 7T4500 - Caterpillar

Illustration 1 g03724240
Front view of engine equipped with air conditioner compressor
(1) Belt tensioner
(2) Idler pulley
(3) Alternator pulley
(4) Air conditioner compressor pulley
(5) Serpentine belt
Illustration 2 g03724341
Front view of engine NOT equipped with air conditioner compressor
(1) Belt tensioner
(2) Idler pulley
(3) Alternator pulley
(5) Serpentine beltInspect
Park the machine on level 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 both sides of the machine.
Illustration 3 g06114636
(A) New belt
(B) Worn belt
Inspect the condition of the serpentine belt. 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. 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 both sides of the machine.
Rotate belt tensioner (1) clockwise with a square drive tool to release the tension from the belt.
Remove the belt.
Install the new belt. Be certain the serpentine belt is routed correctly around all pulleys. Also, be certain the serpentine belt is properly aligned in pulleys that have grooves for the belt.
Close the engine access doors.
Turn the battery disconnect switch to the ON position.