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 TM 9-2815-224-34&P
Section V. TROUBLESHOOTING
locating, isolating, and repairing equipment malfunctions.
The troubleshooting system symptom index Table 2-2 lists
2-10. TROUBLESHOOTING INSTRUCTIONS
common malfunctions which could be found during maintenance of the M977 series engine or its components.
Each malfunction is followed by a list of tests or inspections which will help to determine corrective action to be
taken (Table 2-3).
a. 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.
engine or its components. Perform tests, inspections, and corrective actions in the order listed.
Operation of a deadline vehicle without a preliminary examination can cause further damage to a
disabled component and possible injury to personnel. By careful inspection and troubleshooting, such
damage and injury can be avoided. In addition, cause of faulty operation of a vehicle or component can
often be determined without extensive disassembly.
Troubleshooting
Procedure
Page
ENGINE
Fails to crank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.
Cranks - will not start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Hard to start/stalls at idle speed/does not run smoothly . . . . . . . . . . . . . . . . . . . . . . . . .
3.
Fails to develop full power . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
Overheats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.
Low oil pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.
High oil consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.
High crankcase pressure . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.
Change 2
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