47
P425AWIR (7/120), XP375AWIR (9/110),
HP375AWIR (10/105), VHP300AWIR (14/85)
Symptom
Problem
Solution
Low oil pressure
Low oil level.
Add oil.
Improper type of oil.
Drain, fill crankcase with oil of
proper Viscosity and quality.
High oil consumption
Crankcase oil too light.
Use proper viscosity oil.
Oil leaks.
Check for leaks in lines, gaskets,
and drain plug.
Restricted crankcase vent tube.
Clean vent tube.
Defective turbocharger.
See your authorized servicing
dealer.
Engine emits white
smoke
Improper type of fuel.
Use proper fuel.
Low engine temperature.
Warm up engine to normal operating
temperature.
Defective thermostat.
Remove and check thermostat.
Defective injection nozzles.
See your authorized servicing
dealer.
Engine emits black or
gray exhaust smoke
Improper type of fuel.
Use proper fuel.
Clogged or dirty air cleaner.
Service air cleaner.
Engine overloaded.
Reduce load.
Injection nozzles dirty.
See your authorized servicing
dealer.
Electronic fuel system problem
See your authorized servicing
dealer.
Turbocharger not functioning.
See your authorized servicing
dealer.
