TM 9-2320-272-24-4
5-23. INJECTOR FLOW TEST (Contd)
Adjust injector test stand regulator knob (6) by turning until pressure gauge (1) reads 120 psi
13.
(827 kPa).
Press flow start switch (4) in until counter (5) reads the same as master injector counter strokes.
14.
Observe vial (2) reading, If reading is higher than 122 cc at 120 psi (827 kPa), perform steps 17
15.
through 19 to install new orifice plug (16). If reading is lower than 121 cc at 120 psi (827 kPa),
perform steps 20 through 24 to set fuel flow.
Remove test stand inlet pressure line adapter (11) and burnishing tool from burnishing tool
16.
adapter (13) by turning large knob (9) out until assembly is free.
Remove orifice plug (16) and gasket (15) from injector (10). Discard gasket (15).
17.
NOTE
New orifice plug size .018-.019 in. (0.48-0.49 mm) is small enough
so burnishing will increase fuel efficiency.
Install new gasket (15) and orifice plug (16) in injector orifice (14) and tighten orifice plug (16)
18.
8-10 lb-in. (0.9-1.1N
m).
Install test stand inlet pressure line adapter (11) and burnishing tool on burnishing tool adapter (13)
19.
by screwing large knob (9) into burnishing tool adapter (13) inlet hole until tight.
CAUTION
When seating burnishing tool, use care not to push small knob in
too hard or overtighten indicator knob. When slight contact is
made, stop. Damage can be caused to injector. Test stand must be
running while burnishing.
Turn burnishing tool indicator knob (8) until spaced 3/8 in. (9.5 mm) from large knob (9).
20.
Slowly push small burnishing tool knob (7) in until slight contact is made with injector (10).
21.
Turn small burnishing tool knob (7) counterclockwise to lock large knob (9) and indicator knob (8).
22.
Slowly turn indicator knob (8) in until slightly seated in injector (10). Index indicator knob (8) with
23.
mark on large knob (9).
Advance indicator knob (8) one mark, and back off until spaced 3/8 in. (9.5 mm).
24.
NOTE
Perform steps 12 through 15 and recheck fuel delivery. If delivery
is lower than 121-122 cc, repeat steps 20 through 24. If reading is
higher, install new orifice plug (steps 17 through 19), and recheck
fuel delivery.
Place injector test stand motor switch (3) in STOP position.
25.
Remove drain connector (12) from burnishing tool adapter (13).
26.
Screw out large knob (9) on burnishing tool and remove test stand inlet pressure line adapter (11) from
27.
burnishing tool adapter (13).
Remove burnishing tool from burnishing tool adapter (13). Store burnishing tool in clean place.
28.
5-152
