BREATHER GROUP 6H1774 - Caterpillar

Procedure for the Tractor
Illustration 1 g00910014
Inspect the belts for cracks. Inspect the belts for missing pieces. Inspect the belts for frayed areas. Inspect the belts for wear. A worn belt will ride in the bottom of the pulley. Replace the belts if any of these conditions exist. Replace the belts if the belts are stretched beyond the limits of the adjuster.Note: If new belts are installed, recheck the belt adjustment after 30 minutes of operation. If two belts or more are required for an application, replace the belts in belt sets that are matched. If only one belt of a matched set needs replacement, replace all of the belts in the set. Belts of the same part number are not necessarily matched belts.Fan Drive Belts
The fan drive belts are located in the engine compartment of the tractor. Open the access door on the right side of the engine in order to inspect the fan drive belts. The fan drive belts run on a pulley that is spring loaded. There is no adjustment for the pulley that is spring loaded. Replace the belts if the belts are worn or if the belts are damaged.Alternator Belt
Illustration 2 g00922858
Alternator belt (2) is located in the engine compartment of the tractor. Open the access door on the right side of the engine in order to inspect the alternator belt. Replace the belt if the belt is worn or if the belt is damaged.
Loosen pivot bolts (4), (6), and (7) .Note: Pivot bolt (4) is located under the alternator.
Loosen locking nut (8) .
Move adjusting nut (5) until the proper belt tension is reached. To check the belt tension, apply 110 N (25 lb) of force midway between the pulleys. Correctly adjusted belts will deflect 13 to 19 mm (1/2 to 3/4 inch).
Tighten locking nut (8) to 150 20 N m (110 15 lb ft).
Tighten pivot bolts (4), (6), and (7) .Drive Belt for the Air Conditioning Compressor
Illustration 3 g00922859
Air conditioning compressor belt (1) is located in the engine compartment of the tractor. Open the access door on the top of the engine in order to inspect the air conditioning compressor belt. Replace the belt if the belt is worn or if the belt is damaged.
Loosen pivot bolts (9), (11), and (13) .
Loosen locking nut (10) .
Move adjusting nut (12) until the proper belt tension is reached. To check the belt tension, apply 110 N (25 lb) of force midway between the pulleys. Correctly adjusted belts will deflect 13 to 19 mm (1/2 to 3/4 inch).
Tighten locking nut (10) to 150 20 N m (110 15 lb ft).
Tighten pivot bolts (9), (11), and (13) .
Close the access panels.Procedure for the Scraper
Fan Drive Belts
Illustration 4 g00910197
Fan drive belts (19) are located in the engine compartment of the scraper. Open the access door on the left side of the engine in order to inspect the fan drive belts. Replace the belts if the belts are worn or if the belts are damaged.
Loosen pivot bolts (14), (17),