TM 9-2815-225-34&P
3-55. FUEL INJECTOR TESTING; TEST NO. 3 (Contd)
LOCATION/ITEM
ACTION
REMARKS
a. Setting Up Test Stand (Contd)
CAUTION
Test oil must be a minimum 90F (32C). If temperature is not up to 90F (32C), test stand
must be warmed up on a standard injector, not a master injector. If temperature exceeds
95F (35C), increase cold water flow. If temperature exceeds 135F (57C), drain and
replace with new test oil.
13.
Start-stop switch (6)
Place in start position.
Temperature gauge (8) should
read 90-95F (32-35C).
14.
Pressure regulator (15)
Adjust by turning until fuel
Pressure must be maintained at
pressure gauge (3) reads 120 psi
120 psi (827 kPa) during injector
(827 kPa).
calibration.
15.
Counter (10)
Set as follows:
a. Shift silver counter wheels
(38) to the right.
b. Rotate to indicate 1,020 strokes
and release.
c. Clear counter (10) by rotating
All white counter wheels (37)
thumbscrew (36) one complete
must read zero.
revolution.
16.
Flow start switch (7)
Press in and out until counter (10)
Stir fuel with a rod to settle out
reads 1,020 strokes.
foam. Check amount of fuel col-
lected in vial graduate (4) at end
of 1,020 counter strokes.
17.
Vial graduate (4)
Look directly into vial graduate (4)
Look directly into vial graduate
and observe reading.
(4) at fuel to avoid parallax.
Correct reading is 178 cc at 80
percent of stroke travel.
NOTE
Reading of 178 cc at 80 percent of stroke travel indicates test stand is in calibration. If
reading is more than 178 cc, test stand is not set up properly. Repeat set-up steps if
reading is below 178 cc.
18.
Counter (10)
a. Roll counter (10) back.
Refer to step 15.
b. Set counter (10) up seven strokes
for each cc less than 178 cc.
19.
Vial graduate (4)
Dump fuel.
20.
Flow start switch (7)
Press in and out until counter (10)
sets strokes to obtain 178 cc.
NOTE
If counter is set beyond 1,050 strokes to obtain 178 cc, test stand is not properly calibrated.
Repeat set-up steps. If counter reads 1,050 or below, test stand is in calibration.
21.
Start-stop switch (6)
Place in stop position.
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