TM 5-4320-275-13 & P
Section II. TROUBLESHOOTING
5-4. TROUBLESHOOTING
a. Table 5-1 contains troubleshooting information for locating and correcting most of the operating troubles which
are the responsibility of direct support maintenance. Each malfunction for an individual component, unit, or system is
followed by a list of tests or inspections which will help you to determine probable causes and corrective actions to take.
Perform the tests/inspections and corrective actions in the order listed.
b. This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a
malfunction is not listed or is not corrected by listed corrective actions, notify your supervisor.
c. Only those functions within the scope of direct support maintenance are listed. For troubleshooting procedures
within the scope of operator/crew maintenance, refer to table 3-1. For troubleshooting procedures within the scope of
organizational maintenance, refer to table 4-3.
5-5. SYMPTOM INDEX
Refer to the Symptom Index below. Locate the malfunction which is the same, or most nearly the same, as the trouble
you are having with the pump assembly. The Symptom Index lists the first page of troubleshooting information for that
malfunction. Follow the steps one by one, and perform the corrective actions listed.
Malfunction
Number
Description
Page
1
Gear reducer input shaft will not rotate.
2
Gear reducer output shaft will not rotate.
Table 5-1. Direct Support Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. GEAR REDUCER INPUT SHAFT WILL NOT ROTATE.
Step 1. Check for broken gear or bearing.
Disassemble gear reducer and replace broken parts in accordance with
2. GEAR REDUCER OUTPUT SHAFT WILL NOT ROTATE.
Step 1. Check for broken gear or bearing.
Disassemble gear reducer and replace broken parts in accordance with
5-2
