2 minute read
Injector Synchronization
27. ENGINE COOLANT IS TOO HOT
Cause: Correction:
Restriction To Flow of Coolant Through Radiator Clean and flush radiator or heat exchanger. Core Tubes or Heat Exchanger
Restriction To Air Flow Through Radiator Remove all restrictions of flow.
Low Fan Speed Check for worn or loose fan belts.
Not Enough Coolant in System Add coolant to cooling system. Check for leaks.
Pressure Cap Has A Defect Check operation of pressure cap. Install a new pressure cap if necessary.
Combustion Gases in Coolant Find out where gases get into the cooling system. Make repairs as needed.
Water Temperature Regulators (Thermostats) or Check water temperature regulators for correct Temperature Gauge Has A Defect operation. Check temperature gauge operation. Install new parts as necessary.
Water Pump Has A Defect Make repairs to the water pump as necessary.
Too Much Load On The System Make a reduction to the load.
Wrong Fuel Injection Timing Make adjustment to timing. See Subject, FUEL TIMING.
28. STARTER MOTOR DOES NOT TURN Deleted.
29. ALTERNATOR GIVES NO CHARGE Deleted.
105
33. EXHAUST TEMPERATURE IS TOO HIGH
Cause: Correction:
Air Inlet System Has A Leak Check pressure in the air intake manifold. Look for restrictions at the air cleaner. Correct any leaks.
Exhaust System Has A Leak Find cause of exhaust leak. Make repairs as necessary.
Air Inlet or Exhaust System Has A Restriction Remove restriction.
Wrong Fuel Injection Timing Make an adjustment to the timing. See Subject, FUEL TIMING.
34. AIR STARTING MOTOR TURNS SLOWLY OR HAS A LOSS OF POWER
Cause: Correction:
Low Supply Air Pressure Make an increase to the air supply pressure.
Pressure Regulator Adjustment Not Correct Make an adjustment to the air pressure regulator. Oiler Not Working Correctly Check the oiler, inlet hose, fitting and oil supply hose to make sure they are vacuum tight and free of leaks. Clean, make adjustment, tighten all fittings, fill oiler or make a replacement, if necessary.
Worn Motor Parts Disassemble the motor and make an inspection of the parts. A guide for determining worn parts that cannot be used again is as follows:
a.Install a set of new vanes if any vane is cracked, damaged or worn to the extent that its width is 32 mm (1.25 in.) at either end.
b.Replace rotor bearings if any roughness or looseness is apparent in the bearings.
c.Replace rotor if the body has deep scoring that cannot be removed with the use of emery cloth.
d.Replace cylinder if there are any cracks or deep scoring.
e.Clean up end plate scoring with emery cloth placed on a flat surface.
Air Leakage Check the motor for worn seals. Plug the exhaust. Apply 205 kPa (30 psi) air to the inlet and put the unit in nonflammable fluid for 30 seconds. If bubbles appear, make a replacement of the motor seals.
