12. Engine lacks Power
Possible remedy
Probable causes
Compression poor------------------------------------------------------Inspect for leaks in cylinder head gasket and replace
(pars. 78-80).
Injector nozzles defective---------------------------------------------Clean and teat nozxles (pars. 62-64). Replace defective
nozzles (pan. 62-64).
Energy cell defective--------------------------------------------------Clean or replace energy cell (pars. 78-80).
Injection pump defective---------------------------------------------Replace or repair the injection pump (pars. 66-68).
Valves burned or sticking--------------------------------------------Recondition or replace valves (pars. 78-80).
Piston rings worn or sticking--------------------------------------Replace piston rings (pars. 98-100).
Pistons and sleeves worn.-------------------------------------------Replace pistons and sleeves (pars. 98-100).
13. Engine Exhaust Smokes
Possible remedy
Probable cause
Fuel injectors faulty--------------------------------------------------Repair or replace faulty fuel injectors (pars. 62-64).
Piston rings worn or broken---------------------------------------Replace the piston rings (pars. 98-100).
Exhaust valves not seating properly-----------------------------Replace the exhaust valves or valve seats (pars. 78-
80).
14. Engine Overheats
Possible remedy
Probable cause
Water pump defective-----------------------------------------------Repair or replace water pump (pars. 46-48).
Radiator leak----------------------------------------------------------Repair radiator (pars. 42-44).
Engine block cracked-------------------------------------------------Replace engine block (pars. 114-116).
15. Oil Pressure low
Possible remedy
Probable cause
Suction screen plugged-----------------------------------------------Remove screen (pars. 94-96) and clean.
Main bearings worn--------------------------------------------------Inspect bearings for improper clearance; replace bear-
ings (pars. 110-112).
Oil pump worn-------------------------------------------------------Replace or repair oil pump (pars. 94-96).
16. Oil Consumption High
Possible remedy
Probable cause
Piston rings are worn, broken, or stuck----------------------Replace
piston rings (pars. 98-100).
Pistons anti sleeves are worn-------------------------------------Replace
pistons and sleeves (pars. 98-100).
Main bearings are worn--------------------------------------------Replace
main bearings (pars. 110-112).
Valves guides are worn-------------------------------------------Replace
valve guides (pars. 78-80).
17. Engine Knocks or Develops Excessive Noise
Possible remedy
Probable cause
Piston pin loose------------------------------------------------------Locate the loose piston pins by deactivating the injec-
tors in turn until the noise stops
Replace a defective piston and bushing (pars. 98-100).
Piston or cylinder sleeve broken----------------------------------Replace the piston or cylinder sleeve (pars. 98-100).
Connecting rod bearings worn or loose---------------------Replace defective connecting rod bearings (pars. 98-
100).
Injector spray tip valve leaks-------------------------------------Repair or replace a faulty injector (pars. 62-64).
Timing gears defective----------------------------------------------Repair or replace the gear train (pars. 86-88).
Main bearings worn------------------------------------------------Replace the main bearings (pars. 110-112).
Crankshaft worn, tapered, or out-of-round------------------Repair or replace the crankshaft (pars. 110-112).
Crankshaft end clearance excessive-------------------------------Replace the crankshaft thrust washers (pars. 110-112).
Flywheel loose--------------------------------------------------------Tighten the flywheel mounting capscrews (pars. 106-
108).
AGO 8498A
18
