SPECIAL AR 2677526 - Caterpillar

Illustration 1 g00867453
The tube assembly that is located near the front of the engine must be vented in order to ensure proper filling of the cooling system. Failure to vent this tube assembly may cause the water pump to cavitate. The tube assembly may be vented in one of two ways. The tube assembly may be vented by removing the 154-9024 Sampling Valve . The tube assembly may also be vented by purchasing a 177-9343 Fluid Sampling Cap and Probe Gp from your Caterpillar dealer. Remove the dust cap from the valve. The probe may be inserted into the 154-9024 Sampling Valve in order to vent the tube assembly. The probe must be held in place.Add Extended Life Coolant to the coolant tank until the tube assembly is full.Install the 154-9024 Sampling Valve or remove the probe. Secure the dust cap to the valve. Add Extended Life Coolant until the level in the coolant tank is halfway between the top and the bottom of the transparent tube on sight glass (2) for the coolant tank.