THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)
1-221-22
PPrroobblleem m CCaauusse e CCoorrrreeccttiioonn
31.31. Fuel iFuel in the lubrin the lubri--
cating oilcating oil
1. 1. Bulk oBulk oil suil supply ipply is conts contamiaminatednated..
2. 2. EngiEngine idle tne idle time iime is excs excessessiveive..
1. 1. ChecCheck oik oil sul supplypply. . DraDrain oin oil ail andnd
replace with non-contaminated oilreplace with non-contaminated oil
and replace filters.and replace filters.
2. 2. Low oiLow oil and cl and coolanoolant temt temperatperaturesures
can be caused by long periods ofcan be caused by long periods of
engine idling (time greater thanengine idling (time greater than
10 minut10 minutes)es). . Shut ofShut off the enginef the engine
rather than idle for long periods ofrather than idle for long periods of
time.time.
3. 3. ContContact a Cuact a Cummmmins Auins Authorthorizeizedd
Repair Facility.Repair Facility.
32.32. IntaIntake manifke manifold airold air
temperaturtemperature e aboveabove
specificationspecification
1. 1. TTrucruck spek speed too led too low foow for adeqr adequateuate
cooling at high engine load.cooling at high engine load.
2. 2. CoolCooling fing fan shran shroud is oud is damadamaged.ged.
3. 3. Fan dFan drivrive belt e belt is bis brokroken.en.
4. 4. CharCharge air cooge air cooler filer fins, rans, radiatdiator finor fins,s,
and Freon condenser fins are dam-and Freon condenser fins are dam-
aged or obstructed with debris,aged or obstructed with debris,
insectsinsects, , dirt, etc. dirt, etc. (external(external))
1. 1. ReduReduce ce enginengine e loadload..
2. 2. RepaRepair or ir or replreplace sace shrouhroud.d.
3. 3. ChecCheck the k the fan drfan drive bive belt elt andand
replace belt replace belt if necessaryif necessary..
4. 4. Inspect cInspect charge air harge air coolercooler, radiator, radiator,,
and Freon condensand Freon condenserer. . Clean fins Clean fins ifif
necessary.necessary.
5. 5. ContContact a Cuact a Cummmmins Auins Authorthorizeizedd
Repair Facility.Repair Facility.
33.33. LubrLubricaicating oil con-ting oil con-
sumptisumption on exces-exces-
sivesive
1. 1. VVerify erify oil oil consumpticonsumption raton rate.e.
2. 2. ExtExternal ernal oil oil leakleaks.s.
3. 3. Oil doOil does not mes not meet speeet specifcificaicationtions.s.
4. 4. CrankcCrankcase ase ventilatventilation sion system ystem isis
plugged.plugged.
1. 1. ChecCheck oil k oil added vadded versersus houus hours.rs.
2. 2. TTightighten capsen capscrecrews, piws, pipe plugs anpe plugs andd
fittings fittings as needed. as needed. Replace Replace gas-gas-
kets if necessary.kets if necessary.
3. 3. ChanChange oil age oil and repnd replaclace wite with theh the
proper oil (refer toproper oil (refer toFuel and Lubri-Fuel and Lubri-
cant Specificationscant Specificationsin thein theAppen-Appen-
dicesdices).).
4. 4. ChecCheck and ck and clean clean crankrankcascasee
breather and vent tube.breather and vent tube.
5. 5. ContContact a Cuact a Cummmmins Auins Authorthorizeizedd
Repair Facility.Repair Facility.
34.34. LubrLubricaicating oil con-ting oil con-
taminatedtaminated
continuedcontinued
1. 1. IdenIdentiftify coy contamntaminatination.ion.
2. 2. Bulk oBulk oil suil supply ipply is conts contamiaminatednated..
3. 3. Oil Oil slusludge idge is excs excessiessive.ve.
1. 1. PerfPerform aorm an oil anan oil analyslysis to detis to deter-er-
mine the contaminants.mine the contaminants.
2. 2. ChecCheck oik oil sul supplypply. . DraDrain oin oil ail andnd
replace with non-contaminated oilreplace with non-contaminated oil
and replace filters.and replace filters.
3. 3. RefeRefer to Prr to Problem oblem 37. of th37. of this tris trou-ou-
bleshooting chart.bleshooting chart.
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