ROD AS 5121684 - Caterpillar

Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Dispose of all fluids according to local regulations and mandates.
Illustration 5 g03694021
Typical example
If necessary, install studs (11) to accessory drive (6) (not shown). Tighten the studs to a torque of 25 N m (221.3 lb in).
If necessary, follow Steps 2.a through 2.c in order to install the gear to the air compressor.
Ensure that the shaft of air compressor (4) is clean and dry. Ensure that gear (14) is clean and free from damage.
Install gear (14) and a new spring washer (15) to the shaft of the air compressor.
Apply Tooling (D) to the threads of the shaft. Install nut (16) to the shaft of air compressor (4). Tighten the nut to a torque of 120 N m (89 lb ft).
Install O-ring seal (13) to air compressor (4). Use Tooling (E) in order to lubricate the O-ring seal.
Ensure that number one piston is at the top center position on the compression stroke. Refer to Systems Operation, Testing and Adjusting, "Finding Top Center Position for No. 1 Piston". Note: The air compressor must be timed with the engine in order to minimize engine vibration.
Illustration 6 g03693839
Typical example
Ensure that Tooling (B) is installed in hole (X) in the front housing. Use Tooling (B) in order to lock the crankshaft in the correct position.
Illustration 7 g03698238
Typical air compressor with a SAE drive
Illustration 8 g03698239
Typical air compressor with a DIN drive
Rotate the crankshaft of the air compressor until the timing mark (Y) is aligned with the timing mark A4 on the rear face of air compressor (4). Refer to Illustration 7 for air compressors with a SAE drive. Refer to Illustration 8 for air compressors with a DIN drive.
Illustration 9 g01250816
Typical example
Illustration 10 g03698241
Align air compressor (4) with studs (11). Install the air compressor to the front housing. If necessary, rotate the crankshaft of the air compressor in a clockwise direction in order to align the gears. Note: Ensure that timing mark (Y) is aligned with the timing mark A4. Refer to Illustration 7 for air compressors with a SAE drive. Refer to Illustration 8 for air compressors with a DIN drive.
Install nuts (12). Tighten the nuts to a torque of 78 N m (58 lb ft).
If necessary, follow Steps 9.a through 9.c in order to install cover (18).
Install a new O-ring seal (17) to cover (18). Use Tooling (E) in order to lubricate the O-ring seal.
Install cover (18) to air compressor (4).
Install bolts (19). Tighten the bolts to a torque of 13 N m (9.5 lb ft).
Illustration 11 g03696156
Typical example
Position support bracket (9) onto air compressor (4). Install bolts (8) finger tight.
Install bolts (10) finger tight.
Tighten bolts (8) to an initial torque of 9 N m (79.66 lb in). Tighten bolts (10) to a torque 44 N