PISTON AS 4T1944 - Caterpillar

Use this procedure in order to troubleshoot a high crankcase pressure or use this procedure if one of the following event codes is active. Refer to Troubleshooting, "Event Code List" for the default conditions for these codes.
Table 1
Event Code
Description Default Conditions which Generate this Code System Response
E101(1) High Crankcase Pressure Warning Engine crankcase pressure is above trip point pressure for the delay time. The code is logged.
E013(3) High Crankcase Pressure Shutdown The engine will shut down. The code is logged. Probable Causes
Worn engine components
Plugged crankcase breatherRecommended Actions
Engine Components
Damaged pistons or rings can cause too much pressure in the crankcase. This condition will cause the engine to run rough. There will be more than the normal amount of fumes (blowby) rising from the crankcase breather. The breather 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.Crankcase Breather
A plugged crankcase breather will cause excessive crankcase pressure. Leakage of the crankshaft seal can occur. Sealing of the piston rings can be lost. This will enable crankcase blowby to further increase the crankcase pressure.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.