Cummins — Page 73

Workshop Manual S3.8 Engine A030K288 (Issue 2) 01-2010 Trouble G) Oil pressure suddenly drops. Cause Lack of oil in crankcase. Line between engine housing and oil filter is leaking. The drive of engine oil pump or the pump itself is damaged. If the above-mentioned conditions do not apply, the oil pressure gauge is not working properly or the engine is damaged. Remedy Refill Tighten connecting screws. Caution : In case of a sudden decrease stop the engine immediately ! Dismount pump and have it repaired at a CDSS Dealer workshop. Loosen connection line fro pressure gauge at filter.

If oil flows out of the connecting joint while the engine is running, then the oil pressure gauge or the pressure gauge line is damaged and should be replaced. Otherwise, the engine is damaged, witch should only be repaired at authorised dealer’s workshop. Find out and eliminate leakage. H) Oil pressure increases, vapours and moist air escapes through the breather. There is water in the oil due to leakage in cylinder head or crankcase I) Engine output drops and it is breathing irregularly. Stop engine immediately The piston is seized Lack of oil or inadequate cooling. Replace piston, if necessary, re- bore/hone cylinder at CDSS Dealer workshop, Replace bearing, check crankshaft.

Crankshaft or connecting rod bearing are seized. Vaporous and moist breathing of engine. J) Trouble with alternator and regulator. Battery is not charged. Lack of oil. There is water in the oil due to leakage. Defective regulator or alternator. Get complaint attended by CDSS Dealer’s workshop. Have it repaired at an authorised dealer’s workshop. Brushes are not in contact with the commutator, they get stuck in their guides, are worn out, broken, oily or dirty. Commutator dirty or oiled up. Commutator worn out. Loose or damaged lines. Check, clean or replace brushes. Clean commutator. Smoothen and recut commutator. Repair or replace lines, tighten connections. 41