1-171-17THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)
PPrroobblleem m CCaauusse e CCoorrrreeccttiioonn
18.18. EnginEngine power oue power out-t-
put lowput low
(Continued)(Continued)
3. 3. Oil Oil levelevel il is tos too hio high.gh.
4. 4. IntaIntake or eke or exhauxhaust syst system stem isis
restricted.restricted.
5. 5. Air Air intaintake or ke or exhauexhaust lst leak.eak.
6. 6. Air Air in in fuefuel.l.
7. 7. Fuel dFuel drairain line rn line restrestrictiction.ion.
8. 8. Fuel Fuel grade igrade is not cs not corrorrect oect or fuelr fuel
quality is poor.quality is poor.
9. 9. EnginEngine opere operatinating abovg above rece recom-om-
mended altitude.mended altitude.
3. 3. ChecCheck oil k oil dipsdipstictick and oik and oil panl pan
capacitycapacity. . Adjust to thAdjust to the proper oile proper oil
level.level.
4. 4. CheCheck intck intake and exake and exhaust shaust systystemsems
for restrfor restrictionsictions. . Remove resRemove restric-tric-
tions.tions.
5. 5. ChecCheck for k for loosloose or dame or damaged piaged pipingping
connections or missing pipe plugs.connections or missing pipe plugs.
Check turbocharger and exhaustCheck turbocharger and exhaust
manifolmanifold d mounting.mounting.
6. 6. ChecCheck for aik for air in the fur in the fuel, anel, and tightd tight--
en fuel connections and filter.en fuel connections and filter.
7. 7. Check Check the fuel the fuel lines lines for rfor restricestriction.tion.
Clear or replace the fuel lines.Clear or replace the fuel lines.
8. 8. RefRefer to Coer to Correrrectiction 1. of Pron 1. of Probleoblemm
17. of this troubleshooting chart.17. of this troubleshooting chart.
9. 9. EngiEngine powene power decr decreasreases at 1es at 10,0000,000
feet above sea level.feet above sea level.
10.10. Contact a CumContact a Cummins Authormins Authorizedized
Repair Facility.Repair Facility.
19.19. EnginEngine runs rouge runs roughh
at idleat idle
1.1. Engine opEngine operating at loerating at low ambientw ambient
temperatures.temperatures.
2. 2. ElectroniElectronic fc fault cault codes arodes are acte active.ive.
3. 3. EnginEngine moue mounts ants are wre worn or orn or dam-dam-
aged.aged.
4. 4. EnginEngine idle idle speed ie speed is set ts set too lowoo low
(electr(electronically controlled fuel onically controlled fuel sys-sys-
tems).tems).
5. 5. Air Air in in the the fuefuel.l.
6. 6. Fuel Fuel grade igrade is not cs not corrorrect oect or fuelr fuel
quality is poor.quality is poor.
7. 7. OverOverhead adjhead adjustmustments arents are incoe incor-r-
rect.rect.
1. 1. RefRefer to er to the Cthe Cummummins Eins Enginnginee
Operation and MaintenanceOperation and Maintenance
Manual.Manual.
2. 2. ReRefer fer to to thetheQSM11 Fault CodeQSM11 Fault Code
InformationInformationchart in this section.chart in this section.
3. 3. VisVisuallually checy check engink engine mounte mounts ands and
replace if necessary.replace if necessary.
4.4. VVerify the correrify the correct idle speed set-ect idle speed set-
ting.ting.
5. 5. ChecCheck for aik for air in the fur in the fuel, anel, and tightd tight--
en fuel connections and filter.en fuel connections and filter.
6. 6. RefRefer to Coer to Correrrectiction 1. of Pron 1. of Probleoblemm
17. of this troubleshooting chart.17. of this troubleshooting chart.
7. 7. MeasMeasure anure and adjusd adjust the ovt the overheerheadad
settingssettings. . Refer to tRefer to the Cummhe Cumminsins
Engine Operation and Mainte-Engine Operation and Mainte-
nance Manual.nance Manual.
8. 8. ContContact a Cact a Cummummins Ains Authoruthorizedized
Repair Facility.Repair Facility.
20.20. EnginEngine runs rouge runs roughh
or misfiresor misfires
continuedcontinued
1. 1. CoCondndititioion n ococcucurs rs ononly ly at at ididlele. . 1. 1. ReRefefer r to to PrProboblelem m 1919. . of of ththis is trtrouou--
bleshooting chart.bleshooting chart.
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