TM 9-2320-272-24-4
5-22. INJECTOR TEST STAND CALIBRATION (Contd)
When cylinder (11) is down, hydraulic fluid should show in sight bulb. Open air valve (13) when
7.
cylinder (11) is at the top of its travel; no air should show in sight glass (14). If air is indicated,
tighten all line connections.
NOTE
The master injector is precalibrated and must never be tampered
with.
Place adapter (20) on master injector (17). Ensure wheel marks and pointer are aligned (step 1).
8.
NOTE
Ensure injector seat contains 0.20 in. (0.51 mm) restrictor orifice.
Position test stand link (15) over injector link (9) and place master injector (10) in injector seat (18).
9.
Tip back until test stand link (15) is below test stand push rod (8) and not rubbing.
10.
Open air valve (13) to clamp master injector (10) in place. Ensure test stand link (15) is aligned.
11.
Close hydraulic valve (12) to lock master injector (10) in place.
12.
Connect test stand fuel drain connector (19) to adapter (20).
13.
Connect test stand fuel inlet connector (16) to adapter (20).
14.
CAUTION
If temperature exceeds 135F (57C), drain and replace with new
test oil.
Place injector test stand motor switch (6) in START position. Ensure temperature gauge (7) reads
15.
90-95F (32-35C).
Shift the silver colored counter (1) wheels (3) to the right, rotate counter (1) to indicate 1,020
16.
strokes and release.
Clear counter (1) by rotating thumbscrew (4) one complete revolution. Ensure all white-colored
17.
counter wheels (2) read zero.
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