BUSHING 3909455 - Caterpillar

Table 1
Tools Needed
Part Number Part Name Quantity
8T-2700 Blowby/Air Flow Indicator 1 Excessive blowby can cause a fouling or plugged condition in the following components:
The filter for the Closed Crankcase Ventilation (CCV) system
Turbocharger
AftercoolerDamaged pistons or rings can cause too much pressure in the crankcase. This condition will cause the engine to run rough. The CCV can then become restricted in a very short time, causing oil leakage at gaskets and seals that would not normally have leakage. Blowby can also be caused by worn valve guides or by a failed turbocharger seal.
Illustration 1 g00286269
8T-2700 Blowby/Air Flow Indicator
The 8T-2700 Blowby/Air Flow Indicator is used to check the amount of blowby. Refer to Special Instruction, SEHS8712, "Using the 8T-2700 Blowby/Air Flow Indicator" for the test procedure for checking the blowby.