TM 9-2330-381-14
Section IV. UNIT TROUBLESHOOTING
PARA. NO.
TITLE
4-11.
GENERAL
a. This section contains troubleshooting information for unit level maintenance of the semitrailer and its components.
Use these troubleshooting procedures to help locate and correct faults in the equipment. For best results,
perform tests, inspections, and corrective actions in the order listed.
b. Before performing unit level maintenance, verify operator/crew troubleshooting has been completed and a failed
condition does exist. Further verify all other indications are normal except for suspected fail condition. Once fault
has been isolated, repair or replace failed component.
c. The troubleshooting procedures are grouped by major categories. Become familiar with these major equipment
categories. Use the symptom index (para. 4-12) to more easily locate the fault in question.
d. These procedures cannot list all faults that may occur, nor all tests or inspections and corrective actions. If a fault
should occur that is not listed, notify DS maintenance.
4-12.
SYMPTOM INDEX
Symptom
Symptom
no.
APU
Engine does not crank over ..........................................................................................................
Engine cranks but does not start ..................................................................................................
Engine runs rough ........................................................................................................................
White or blue exhaust smoke is observed after warmup ................................................................
Black or dark gray exhaust smoke is observed after warmup ........................................................
Insufficient engine output "low power"............................................................................................
Excessive oil consumption (over 1 pint (0.5 1) per 250 hours of
operation) ..............................................................................................................................
Fuel mixed into lubricant oil ..........................................................................................................
Engine coolant mixed into lubricant oil ..........................................................................................
4-21
