TM 5-3895-373-20
REFERENCE INFORMATION
AIR INTAKE/EXHAUST SYSTEM
Refer to TM 5-3895-373-10 for engine starting and equipment operating procedures. Refer to paragraph
2.10 for connecting and disconnecting STE/ICE-R test set to DCA. Refer to paragraph 1.16 for
turbosupercharged intake and exhaust system operating principles.
Symptoms of intake/exhaust problems
include hard starting, lack of power,
and/or emission of a black, fuel-rich
exhaust.
To
gain
access
to
air
intake
components,
open
front
top
left
access door, front top right access
door, and right access door per TM 5-
3895-373-10. Remove engine access
cover per paragraph 2.22.
A thorough visual inspection of air
intake system requires removal of
baffle, air cleaner filter element, air
cleaner deflector, and ducting. Make
sure that the air intake is not blocked
in any manner. Replace filter element,
if visibly clogged.
AIR CLEANER PRESSURE DROP TEST - STE/ICE-R TEST 28
DESCRIPTION
TEST PROCEDURES
Measures pressure drop across air cleaner to detect
1.
Shut down engine per TM 5-3895-373-10.
extent of air cleaner clogging.
2.
Set TEST SELECT switches to 28.
Transmitter: 12258932-2
DCA Test Pins: AA and AB
3.
Press and hold TEST button until CAL appears on
display.
PRE-TEST PROCEDURES
4.
Release TEST button and wait for offset value to
appear
Run confidence test per TM 9-4910-571-12&P.
on display. If offset value is within -9 and +9,
proceed.
5.
Press and release TEST button.
POSSIBLE ERROR MESSAGES
6.
Run engine at test speed per TM 5-3895-373-10.
005 Required offset test was not performed.
7.
Observe displayed value. Displayed values are in
pounds per square inch (psi). Expected maximum
values are:
Cranking
1.2 psi
@500 to 850 rpm
2.1 psi
@2640 ±40 rpm
14.5 psi
If STE/ICE-R reading does not approach expected value, check transmitter per DCA diagnostics,
paragraph 2.21.
2-67
