VALVE GP-PRESSURE REDUCING 1285346 - Caterpillar

Table 1
Event Codes    
J1939 Code and Description    Conditions which Generate this Code    System Response    
101-15 Engine Crankcase Pressure : High - least severe (1)     The engine crankcase pressure is greater than the trip point pressure for the programmed delay time.     The code is logged.    Probable Causes
Plugged crankcase breather
Worn engine componentsRecommended Actions
Table 2
Troubleshooting Test Steps     Values     Results    
1. Check the Crankcase Breather
A. Check for a plugged crankcase breather.
Note: If the engine is running in cold ambient temperatures, check to ensure that the breather tube is not plugged with ice.
   
Crankcase Breather
   
Result: The crankcase breather is plugged.
Repair: Replace the crankcase breather.
Note: A plugged crankcase breather can cause the crankshaft seal to leak. Sealing of the piston rings can be lost and the increase in crankcase blowby will increase the crankcase pressure.
Result: The crankcase breather is not plugged.
If the problem is not resolved, proceed to the next step.
   
2. Engine Components
- Check the turbocharger. for a failed seal.
- Check for worn valve guides.
- Check for damaged pistons or rings.
Note: Excessive crankcase pressure may cause the engine to run rough. The engine will begin to emit an excessive volume of fumes (blowby) through the crankcase breather. The breather can then become restricted in a short time, causing oil leakage at gaskets and seals that would not normally have leakage.
    Damage and wear    
Result: Engine components are OK.
Result: Engine components are NOT OK.
Repair: Or replace any components necessary.