VALVE GP-CONTROL 4372868 - Caterpillar

Do not disconnect the air lines until the air pressure in the system is at zero. If hose is disconnected under pressure it can cause personal injury.
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.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Remove the air pressure from the air tank and drain the coolant from the cooling system into a suitable container for storage or disposal. Refer to the Operation and Maintenance Manual.
Illustration 1 g01261508
Disconnect hose assemblies (1) and (3) from air compressor (8).
Disconnect hose (2) and hose assembly (7) from air compressor (8). Remove the clip and the bolt for hose assembly (7).
Install Tooling (A) and a suitable lifting device to air compressor (8). The weight of air compressor (8) is approximately 28 kg (61 lb).
Remove the mounting bracket for the air compressor by using the following procedure:
Remove bolts (4) that fasten the mounting bracket to air compressor (8).
Remove bolts (6) that fasten the mounting bracket to the cylinder block. Remove the mounting bracket for air compressor (8).
Remove bolts (5), air compressor (8), and the gasket from the front housing.
Illustration 2 g01263084
Position air compressor (8) in Tooling (B) and remove bolt (9) and washer (10). Remove gear (11). Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
A 138-7573 Link Bracket 1
B 132-5451 Holding Fixture 1
C 9S-3263 Thread Lock Compound 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 3 g01263084
Position air compressor (8) in Tooling (B). Install gear (11). Install bolt (9) and washer (10). Tightened bolt (9) to a torque of 170 15 N m (125 11 lb ft).
Illustration 4 g01261508
Install Tooling (A) and a suitable lifting device to air compressor (8). The weight of air compressor (8) is approximately 28 kg (61 lb).
Inspect the condition of the gasket. Replace the gasket, if necessary. Install the gasket between air compressor (8) and the front housing.
Position air compressor (8) in the front housing. Ensure that the drive gear engages correctly with the gear in the front housing.
Apply Tooling (C) to the threads of bolts (5). Install bolts (5). Tighten bolts (5) to a torque of 100 20 N m (75 15 lb ft).
Install the mounting bracket for the air compressor by using the following procedure:
Position the bracket for air compressor (8) and install bolts (4) and bolts (6) finger tight.
A loose compressor bracket can lead to a broken front cover and can cause damage to the front gear train of the engine.
Tighten bolts (4) to a torque of 60 12 N m (44 9 lb ft). Tighten