MTU 12 V 4000 Lx4 Operating Instructions Manual page 114

063 – HI P-Crankcase
Yellow alarm.
Associated parameter 2.0106.931
Cause
Crankcase pressure too high
(limit value 1). Restrictor valve in
crankcase breather is closed too
much, air filter is defective, oil
separator is clogged, piston
rings are seized, other damage
to crank drive.
064 – SS P-Crankcase
Red alarm. Engine stop.
Associated parameter 2.0106.932
Cause
Crankcase pressure too high
(limit value 2). Restrictor valve in
crankcase breather is closed too
much, air filter is defective, oil
separator is clogged, piston
rings are seized, other damage
to crank drive.
067 – HI T-Coolant
Yellow alarm.
Associated parameter 2.0120.931
Cause
Coolant temperature after
engine too high (limit value 1).
Engine coolant pump failure,
volumetric flow too low, air in
engine coolant circuit.
068 – SS T-Coolant
Red alarm. Engine stop.
Associated parameter 2.0120.932
Cause
Coolant temperature after
engine too high (limit value 2).
Engine coolant pump failure,
volumetric flow too low, air in
engine coolant circuit.
114 | Troubleshooting | MS15027/00E 2013-10
Corrective action
1. Check crank drive:
• Crank engine (→ Page 147).
• Endoscope combustion chambers from bottom dead center
to top dead center.
2. Check air filter for contamination, replace if contamination is
visible (→ Page 171).
3. Check setting of BlowBy restrictor valve.
4. Check oil separator condition, replace if necessary
(→ Page 149).
Corrective action
1. Check crank drive: Crank engine (→ Page 147), endoscope
combustion chambers from BDC to TDC.
2. Check air filter for contamination, replace if contamination is
visible (→ Page 171).
3. Check setting of BlowBy restrictor valve.
4. Check oil separator condition, replace if necessary
(→ Page 149).
Corrective action
u Check engine coolant circuit.
Corrective action
u Check engine coolant circuit.