TM-9-2815-200-35
ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED ,12 - CYLINDER , ASSEMBLY ;MODELS AVDS-1790-2M (2815-856-4996), AVDS-1790-2A AND AVDS-1790-2AM (2815-856-9005)
TECHNICAL MANUAL; DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
TM-9-2815-200-35 - Page 548 of 779
Figure 8-3. Mean performance curve.
f. Acceptance Test.
Repair all fuel and oil
leaks at start of test. Check again before engine is
removed from stand. At completion of test run,
check acceleration,
idle, idle oil pressure, and
operation of governor.
Acceleration should be
checked
with
a
moderate
steady
throttle
movement. If engine power is outside limits,
check for cause and make correction. Gross
corrected horsepower shall be maintaine d
between 735 and 765 horsepower. The governor
shall be adjusted to limit the engine speeds as
follows:
(1) Low idle - 675 to 725 rpm.
(2) Hig h
idle
(no
load)
-
2640
rpm
maximum .
g.
Overhaul/ MWO Engine Data Plate .
Afte r
engin e
is
overhauled ,
instal l
overhaul/ MWO data plat e
o n
engine a s
outlined in TB ORD-1030.
h. Engine Storage.
After engine has suc-
cessfully completed the acceptance test th e
engine is to be stored or shipped in accordance
with instructions provided in section II of this
Chapter.
8-5.
Engine Test and Adjustments
a. Oil Pressure .
Oil pressures shall be
measured in accordance with paragraph 8-1i, (1)
and (2). The oil pressure regulator valve (D, fig.
6-104) is adjustable, within limits, by the ad-
dition or removal of washer-type shims (A)
between relief valve cover and spring. Add shims
to increase pressure and remove shims to reduce
pressure. When oil pressure cannot be adjusted
to within the 40-70 psi range, in this manner.
replace valve spring (C).
Note.
Do not add more than three shims,
When oil pressure still does not fall within limits
specified, replace faulty valve.
b. Fuel Pressure.
Install a pressure gage in
place of the pipe plug (fig. 8-1) in the top, center
of the secondary
fuel filter and / or water
separator to check fuel pressure. Fuel pressure
should be adjusted to 40 psi by turning adjusting
screw of the fuel pump (fig. 8-1). Turn screw
clockwise
to increase pressure and coun -
terclockwise to decrease pressure. Refer to TM
9-2910-213-34 for further information on th e
fuel pump.
c. Idle Speed.
Adjust for smooth idle at 675
to 725 rpm by turning idle adjusting screw (D,
fig. 4-85). Turn screw clockwise to increase idle
speed and counterclockwise to decrease idle
speed.
d. Throttle Control Linkage.
Normal pi n
travel on the vehicle control lever is ap -
proximately 3 / 16 inch from the stop at both the
idle position and the full throttle position. W hen
the pin travel is more or less than 3 / 16 inch
without spring movement, adjust rod to bring
within limits specified (fig. 4-85).
e.
Manifold Heater.
Pump fuel into th e
engine using a purge pump and press heater
button. If heater is operative, heat will be felt at
intake manifold turbosupercharger tube (feel
intake manifold turbosupercharger tube with
hand). When no heat is felt, check harness and
heater spark plug for faulty connections. Inspect
purge pum p
and heater nozzle for prope r
operation. Repair faulty connections or replace
purge pump or heater nozzles.
f. Oil Consumption Check.
(1) Inspect engine for oil leaks.
(2) Operate engine until normal operating
temperature is reached (180°F).
(3) Idle engine for five minutes to allow oil
level to stabilize. Check oil level with engine
idling, When necessary, add oil to bring level in
oil pan to full level, as indicated on level gage.
(Refer to applicable Lubrication Order.)
(4) Operate engine for 1-1 / 2 hours at 2400
rpm and maximum horsepower.
(5) Idle engine for five minutes to allow oil
level to stabilize.
(6) Check oil level, with engine idling, using
oil level gage.
8-6
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