TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WARNING
Diesel fuel burns easily. Do not smoke or allow flames nearby. Disconnect batteries when
working on fuel system. Failure to observe these precautions could cause serious injury to
personnel.
Step 18.
Check preheater primer pump (5) as follows: Using 9/16-inch and 7/16-inch
open-end wrenches, unscrew and take pressure hose (8) off fitting (9). Put
pressure hose (8) into a container and have assistant pump preheater primer
pump (5). Check for a strong flow of fuel with no air bubbles. Get rid of drained
fuel (page 2-424).
a. If fuel flow is weak or air bubbles are present, go to step 19.
b. If fuel flow is strong and no air bubbles are present, go to step 23.
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