TM-9-2815-220-24

AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

  TM-9-2815-220-24 - Page 163 of 1563

TM 9-2815-220-24
INTAKE MANIFOLD HEATER ABNORMAL OPERATION
0023 00
THIS WORK PACKAGE COVERS:
Troubleshooting Table and Diagnostic Tests
INITIAL SETUP:
Tools:
General mechanic’s tool kit (item 121, WP 0176)
Personnel Required
Track Vehicle Repairer (2) 63H10
Equipment Conditions:
Engine installed in vehicle or ground hop.
MALFUNCTION 1:
Manifold heater inoperative.
PROBABLE CAUSE
CORRECTIVE ACTION
a. Electrical or fuel system malfunction.
(1) Check manifold heater operation.
Repair or
replace defective parts as indicated by the
following tests.
PROCEDURE
OBSERVATION
ANALYSIS
Manifold heater Operational Check
Hold fuel shut-off (engine
"STOP") switch and crank
engine.
While cranking engine,
engage manifold heater
switch and hand operate
purge pump.
Evidence of heat indicates
manifold heater operation
is normal.
Place hand on intake
manifold heater housing.
Check both sides of engine.
Note housing temperature (warm
or hot to touch).
No heat indicates
manifold heater is
inoperative.
Replace
manifold heater
(WP 0088, Manifold
Heater Assembly and
Related Parts
Replacement).
WP 0023 00-1


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