THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)
1-121-12
PPrroobblleem m CCaauusse e CCoorrrreeccttiioonn
3. 3. Air Air comcomprespressorsor
noise is excessivenoise is excessive
(Continued)(Continued)
2. 2. Ice buIce builduildup in the aip in the air sysr system ctem com-om-
ponents.ponents.
2. 2. InspInspect aiect air disr discharcharge linge line ande and
elbow fittelbow fittings for icings for ice. e. Remove icRemove ice.e.
3. 3. ContContact a Cuact a Cummmmins Auins Authorthorizeizedd
Repair Facility.Repair Facility.
4. 4. Air Air comcomprespressorsor
pumping excesspumping excess
lubriclubricating oil ating oil intointo
the air systemthe air system
1. 1. Air cAir comprompressessor pumor pumping tiping timeme
excessive.excessive.
2. 2. CarCarbon builbon buildup excdup excessessive iive in the airn the air
dischardischarge ge line.line.
1. 1. Check Check air air comprescompressor sor duty cduty cycle.ycle.
2. 2. RefeRefer to Corr to Correcrection 3. otion 3. of Probf Problemlem
1. of this troubleshooting chart.1. of this troubleshooting chart.
3. 3. ContContact a Cuact a Cummmmins Auins Authorthorizeizedd
Repair Facility.Repair Facility.
5. 5. Air Air comcomprespressor sor wilwilll
not maintain ade-not maintain ade-
quate air pressurequate air pressure
(not pumping con-(not pumping con-
tinuously)tinuously)
11. A. Aiir r ssyysstteem m lleeaakkss. . 11. R. Reeffeer r tto o CCoorrrreeccttiioon n 22. . oof f PPrroobblleemm
1. of this troubleshooting chart.1. of this troubleshooting chart.
2. 2. ContContact a Cuact a Cummmmins Auins Authorthorizeizedd
Repair Facility.Repair Facility.
6. 6. Air Air comcomprespressor sor wilwilll
not stop pumpingnot stop pumping
1. 1. Air Air syssystem tem leakleaks.s.
2. 2. DefectiDefective ve air air governorgovernor..
1. 1. RefeRefer to Corr to Correcrection 2. otion 2. of Probf Problemlem
1. of this troubleshooting chart.1. of this troubleshooting chart.
2. 2. ReplReplace aiace air govr governoernorr..
3. 3. ContContact a Cuact a Cummmmins Auins Authorthorizeizedd
Repair Facility.Repair Facility.
7. 7. AlteAlternatrnator or notnot
charging or charging or insuffinsuffi-i-
ciently chargingciently charging
1. 1. AltAlternaternator beor belt ilt is los loose.ose.
2. 2. BattBattery cery cable oable or conr connectnection iion iss
loose, broken or corroded (exces-loose, broken or corroded (exces-
sive resistance).sive resistance).
3. 3. BatteBatterieries s failfailed.ed.
4. 4. AlteAlternatrnator pulor pulley iley is looss loose on shafte on shaft..
1. 1. ChecCheck bk belt elt tenstension.ion.
2. 2. ChecCheck battk battery cery cables ables and connand connec-ec-
tions.tions.
3. 3. ChecCheck batk battertery cony conditditionsions..
4. 4. TTightighten pen pullulleyey..
5. 5. ContContact a Cuact a Cummmmins Auins Authorthorizeizedd
Repair Facility.Repair Facility.
8. 8. CoCoolaolant nt loloss ss --
ExternalExternal
continuedcontinued
1. 1. CoolCoolant lant level evel is his high.igh.
2. 2. RadiRadiator cator cap is iap is incorncorrecrect ort or
defective.defective.
3. 3. ExteExternal rnal engiengine lne leak.eak.
4. 4. RadiRadiator or cator or cab heateab heater is ler is leakiaking.ng.
1. 1. ChecCheck ck coolanoolant lt levelevel..
2. 2. Replace Replace with with correccorrect rat radiator diator capcap
(15 psi).(15 psi).
3. 3. VisVisuallually insy inspect pect the engthe engine andine and
components for seal or gasketcomponents for seal or gasket
leaks and leaks and repairrepair..
4. 4. VisualVisually ily inspect nspect the radithe radiatorator, heat-, heat-
er, hoses and connections for leakser, hoses and connections for leaks
and repair.and repair.
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