Probable Cause: Install a 4P8278 sight glass in the fuel return line and operate the engine to check for gas bubbles, an indication of air…
Category: 3126
Probable Cause: * Engine Design * Defective Valve Or Seat 1. Engine design: On diesel engines a small amount of soot is normal. This is…
A. Outside Leaks (Go to Step 1) Probable Cause(s): * Leaks In Hoses Or Connections * Leaks In The Radiator And/Or Expansion Tank * Leaks…
Probable Cause: * Defect In Unit Injector Sleeve 1. Defect in unit injector sleeve: Remove unit injectors and inspect sleeves in cylinder head unit injector…
Probable Cause(s): * Defective Upper Seal On Unit Injector * Porosity In Cylinder Head * Porosity In Fuel Filter Base * Defective Seal In The…
Probable Cause(s): * Drive Belt For Alternator Is Worn Or Has A Defect * Loose Alternator Drive Pulley * Drive Belt And Drive Pulley For…
Probable Cause(s): * Alternator Or Alternator Regulator Has Loose Connections * Alternator Regulator Has A Defect * Alternator Field Lead Shorted To Battery Voltage 1.…
Probable Cause(s): * Loose Drive Belt For Alternator * Charging Or Ground Return Circuit Or Battery Connections Have A Defect * Alternator Regulator Has A…
Probable Cause(s): * Battery Has Low Output * Wires Or Switch Has Defect * Starting Motor Solenoid Has A Defect * Starting Motor Has A…
Probable Cause(s): * Air Inlet System Has A Leak * Exhaust System Has A Leak * Air Inlet Or Exhaust System Has A Restriction *…