GEAR-PLANETARY 8Q2127 - Caterpillar

Inspect
Park the machine on level ground. Move the transmission control to the NEUTRAL position and engage the parking brake. Shut off the engine.Note: Before you service the pipelayer, make sure that the counterweight frame is fastened in the retracted position.
Turn the battery disconnect switch to the OFF position.
Open the access door on the right side of the machine.
Illustration 1 g01323939
Alternator only
Illustration 2 g01017579
A/C Compressor (1) Belt tensioner (2) Alternator (3) Compressor (4) Serpentine belt (5) Idler pulley (6) Alternator guard
Inspect the condition of serpentine belt (4). Replace the serpentine belt if excessive wear or cracking has occurred. Wear due to belt slippage indicates that the belt tensioner possibly needs to be replaced.
The belt should deflect 14 to 20 mm (.56 to .81 inch) under 110 N (25 lb) of force. Use a 144-0235 Belt Tension Gauge in order to measure the tension.
Close the engine access doors.
Turn the battery disconnect switch to the ON position.Replace
Note: If a new belt is installed, check the belt adjustment (drive belt tension) again after 30 minutes of engine operation.Replace
Park the machine on level ground. Move the transmission control to the NEUTRAL position and engage the parking brake. Shut off the engine.Note: Before you service the pipelayer, make sure that the counterweight frame is fastened in the retracted position.
Turn the battery disconnect switch to the OFF position.
Open the engine access doors.
Turn belt tensioner (1) in order to release the tension from the belt with a square drive.
Remove serpentine belt (4) .
Install the new serpentine belt.
Close the engine access doors.
Turn the battery disconnect switch to the ON position.