TM-9-2320-279-20-1

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3

  TM-9-2320-279-20-1 - Page 350 of 985

TM 9-2320-279-20-1
STE/ICE Instructions
2-16. SIMPLIFIED TEST EQUIPMENT FOR INTERNAL COMBUSTION ENGINES]
(STE/ICE) INTRODUCTION.
This section of troubleshooting contains procedures for operating the
STE/ICE: and troubleshoot M977 series vehicle’s internal combustion engines and
associated fuel and electrical systems. The procedures cover vehicle serviceability testing and primary fault
isolation. This part of the troubleshooting section is applicable only if STE/ICE is available. If STE/ICE
is
not available, go to paragraph 2-14, Table 2-7, System Symptom Index and Table 2-8, Troubleshooting
Subject Index.
STE/ICE Maintenance.
is covered in TM 9-4910-571-12&P.
Description, operation, and organizational maintenance of STE/ICE system
6. STE/ICE Tests.
(1)
STE/ICE Test Chain Index.
The procedures are arranged in a GO chain (Table 2-10) and a
NO-GO chain (Table 2-11). In the GO chain, the satisfactory result (YES) from each test leads to a GO to
the next test. If vehicle fails the test in the GO chain, the unsatisfactory result leads to a corrective action,
higher level of maintenance, or to the NO-GO chain. The NO-GO chain contains procedures to determine
the cause of failure and is arranged in steps detailing fault isolation and corrective action.
(2) General Use of Test Chains.
The condition of a test vehicle need not be known. The absence of
malfunctions would be quickly demonstrated by satisfactory passage (in sequence) of all tests in the GO
chain (fig. 2-17). A malfunctioning vehicle will fail one or more GO chain tests, resulting in fault isolation
and corrective action. The only symptoms needed to indicate STE/ICE testing are: 1) Engine won’t start, 2)
Engine won’t run right.
Table. 2-10. Engine GO Chain index (Combined Mode)
GO
Test
Number
GO1
GO2
GO3
GO4
GO5
GO6
GO7
GO8
Test Title
VTM Connections and Checkout
First Peak Test - Starter Current
Engine Start - Lubrication Check
Charging Circuit and Battery Voltage Test
Engine Warmup/Coolant Check/Oil Pressure Test/Fuel
Filter Restriction Test
Governor Check/Power Test
Idle Speed/Governor Check
Compression Unbalance Test
Table.
2-11. Engine NO-GO Chain Index (Combined Mode)
NO-GO
Test
Number
Test Title
NG05
Low Oil Pressure Check
NG20
No Crank - No Start
NG30
Engine Crank- No Start
NG31
Gage Test
NG50
Charging Circuit Tests
NG80
Starter Circuit Tests
NG81
Battery Tests
NG90
Governor/Power Test Fault Isolation
NG130
Engine Tightness Test
(2-269 blank)/2-270
Change 3


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