SECTlON V: TROUBLESHOOTlNG
TM 9-2350-256-20
M Remove fuel/water separator filter bleeder valve.
Install a pressure gage (minimum of 100 psi) in
fuel/water separator filter cover bleeder valve
opening. Turn MASTER and in-tank fuel pump
switches to ON position. Start engine and operate at
high-idle speed (1800-2400 rpm). Pressure should
read 55-60 psi (379313 kPa). If fuel pressure is less
than 55 psi (379 kPa), clean filter and replace
primary fuel filter element (see paragraph 4-15).
Turn MASTER and in-tank fuel pump switches to
ON position. Start engine and operate at high-idle
speed (1800-2400 rpm). If fuel pressure is less than
55 psi (379 kPa), replace mechanical (gear type) fuel
pump (see paragraph 4-5).
If fuel pressure is less than 55 psi (379 kPa), replace
all three fuel/water separator elements (see
paragraph 4-15).
N
With engine not running, open rear exhaust doors
and observe engine deck liner for wet spots. If wet
spots can be seen on engine deck liner, remove
engine deck (see paragraph 9-51). Remove front and
rear cooling fan (see paragraph 5-2). Loosen and
tighten fuel line fittings that show evidence of
leaking. If leakage persists, notify Direct Support
Maintenance. If no wet spots are found on engine
deck liner, remove left- and center-front air inlet
grilles (see paragraph 9-57) and check for fuel leaks.
Tighten, repair, or replace fuel lines or components
leaking fuel. Check for proper operation of
fuel/water separator automatic drain system (see
paragraph 4-17). If leaking and/or excessive fuel
consumption persists, notify Direct Support
Maintenance.
O I L C O O L I N G S Y S T E M
SYMPTOMS
Low engine oil pressure, engine oil temperature
Engine oil consumption excessive.
normal.
Do step F.
Do steps A through D.
High engine oil temperature.
High engine oil pressure, engine oil temperature
Do steps G through K.
normal.
Do steps A through E.
A
Check to see that proper grade of oil for prevailing
temperature is used in engine. If improper grade
was used, refill with proper grade of oil (refer to TM
9-2350-256-10).
Change 1
2-40.7
