Figure 3-62. Air pressure adjustment.

*TM 9-2815-213-34

test stand or other pressure source to injector inlet or

adapter.

(12) Start test stand or other source of fuel and set

pressure at 50 psi.

(13) Shift target ring in base of tool so one spray

stream hits center of No. 1 or index window. This is tallest

window and is next to target

slide handle.

(14) Each spray stream must hit a window in the

target.

(15) If a stream hits above, below, left, or right of a

small window, shift the target ring so No. 1 window is at that

stream. If stream is still outside No. 1 window, cup is

defective or spray hole is dirty. Clean spray holes with

compressed air and recheck cup. If spray pattern is still de-

Figure 3-62. Air pressure adjustment.

fective, discard cup or check to make sure proper target ring

is being used.

NOTE

For a cup to be acceptable or more than one stream

must require the increased tolerance of the No. 1

window.

Figure 3-63. Master injector installation.

Figure 3-65. Injector mounted in test stand

(16) After testing, assemble plunger with spring in

body and store in clean place until ready for flow test.

d. Injector Flow Check.

(1) The injector test stand must be located near hot

and cold water connections. Water tem- perature, controlled

by a mixing valve, is used to maintain test fuel at an 80/100

degree Fahren- heit temperature range.

(2) Fill test fuel tank a/4 full of test fuel and maintain

this level or higher during test. Test fuel capacity is

approximately five gallons.

(3) Fill hydraulic fluid reservoir to half

Figure 3-64. Fuel inlet installation

(10) Tighten knurled knob to seal plunger

bore.

(11) Attach fuel inlet line from injector

3-30