Thermo King SB-190 30, Manual

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Mechanical Diagnosis (Rev. 02/03)
93
Engine runs hot Dirty radiator Wash radiator
Coolant level is low Add coolant
Cooling system heavily scaled Cleaning cooling system
Cylinder head gasket leaks Replace cylinder head gasket. Use
correct gasket
Faulty thermostat Check or replace thermostat
Loose or worn water pump belt Replace belt
Oil pressure low Insufficient oil in pan Add oil
Faulty oil pressure switch Check oil pressure switch. Replace if
necessary
Oil control valve defective Check oil pressure control valve
Worn oil pump, camshaft, main or
connecting rod bearings, loose oil
gallery plug Repair engine
High oil consumption Oil leakage Check and eliminate possible
causes at rocker arm cover, oil lines,
oil filter, front timing cover or
crankshaft seals
Damaged valve seals Replace seals on valve stem
Worn valve stem Replace valves
Broken piston rings or cylinder bore
worn or scored Have engine repaired and rebored.
Replace broken piston rings
Clogged air cleaner system Unclog air cleaner
CONDITION POSSIBLE CAUSE REMEDY