BREATHER GP 1786540 - 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 g01353471
Typical example
If necessary, follow Step 1.a through Step 1.b in order to install gear (17) to air compressor (5).
Ensure that the shaft of air compressor (5) is clean and dry. Ensure that gear (17) is clean and free from damage.
Install gear (17) and a new spring washer to the shaft of air compressor (5).
Apply Tooling (D) to the threads of the shaft. Install nut (18) to the shaft of air compressor (5).
Use a suitable tool in order to prevent gear (17) from rotating as nut (18) is tightened. Tighten the nut to a torque of 120 N m (89 lb ft).
Install a new O-ring seal (19) to the recess of air compressor (5). 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 g01353468
Typical example
Ensure that Tooling (B) is installed in Hole (X) in the cylinder block. Use Tooling (B) in order to lock the crankshaft in the correct position. Note: Do not use excessive force to install Tooling (B). Do not use Tooling (B) to hold the crankshaft during repairs.
Illustration 7 g01333452
Typical air compressor with a SAE drive
Illustration 8 g01333453
Typical air compressor with a DIN drive
Rotate the crankshaft of the air compressor until timing Mark (X) is aligned with timing mark A6 on the rear face of air compressor (5). Refer to Illustration 7 for air compressors with a SAE drive. Refer to Illustration 8 for air compressors with a DIN drive.
Illustration 9 g01353470
Typical example
Align air compressor (5) with studs (13). 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 (X) is aligned with the timing mark A6. Refer to Illustration 7 for air compressors with a SAE drive. Refer to Illustration 8 for air compressors with a DIN drive.
Install nuts (14). Tighten the nuts to a torque of 78 N m (58 lb ft).
If necessary, follow Steps 8.a through 8.c in order to install cover (15).
Install a new O-ring seal (12) to cover (15). Use Tooling (E) in order to lubricate the O-ring seal.
Install cover (15) to air compressor (5).
Install bolts (16). Tighten the bolts to a torque of 13 N m (9.5 lb ft).
Illustration 10 g01353469
Typical example
Position support bracket (10) onto air compressor (5). Install bolts (9) finger tight.
Install bolts (11) finger tight.
Tighten bolts (9) to a torque