TM 10-4320-309-14
TM 4320-14/1
CHAPTER 4
DIRECT SUPPORT MAINTENANCE INSTRUCTIONS
4-1. INTRODUCTION
This chapter of the technical manual provides intermediate maintenance instructions for direct support mainte-
nance personnel. It provides the means to locate and correct operating symptom problems. Chapter 4 is di-
vided into two sections, Section I Troubleshooting, and Section II Maintenance Procedures.
Troubleshooting contains those symptoms noted during operation and provides the checks to isolate defects
and localize faulty parts. Maintenance procedures provide the information to correct, repair, or replace the faulty
components of the Diesel-Driven Centrifugal Pump Assembly Model PAD125A.
Section I. TROUBLESHOOTING
INDEX
Para
Para
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Troubleshooting Procedures . . . . . . . . . . . . . 4-3
4-2. SCOPE
This level of troubleshooting contains checks and corrective maintenance actions which will isolate defects to
be corrected by specific maintenance procedures. Table 4-1 is a direct support troubleshooting chart. Symp-
toms listed in this table are accompanied by suggested tests or inspections which, in turn, suggest corrective
action and the appropriate maintenance paragraph reference. Corrective action sometimes suggests additional
checks to confirm the troubled area or further localize and isolate trouble to a more specific component. Mainte-
nance procedures include removal, cleaning, inspection, repair, replacement, and installation. These mainte-
nance procedures can be found in Section II of this chapter.
4-3. TROUBLESHOOTING PROCEDURE
Refer to Table 4-1 to locate problematic symptoms, corrective action steps to isolate a faulty component, and
references to provide corrective maintenance. The following paragraphs briefly explain the different column
headings of Table 4-1.
a.
Column 1 Malfunction Number
This column of the table is a sequential listing of problematic symptoms. The malfunction number is
used for cross reference purposes and to avoid needless repetition.
4-1
