TM 9-2320-289-20
3-21.1. TRANSMISSION VACUUM VALVE REPLACEMENT (Con’t).
b.
INSTALLATION
1.
2.
3.
4.
5.
NOTE
Transmission vacuum valve (5) must always be adjusted when it is installed.
Install transmission vacuum valve (5) on fuel injector pump (1) with 2 screws (6). DO NOT fully
tighten screws. Transmission vacuum valve must be free to rotate on fuel injector pump.
Attach vacuum source to lower vacuum nipple (4). Attach vacuum gage to upper vacuum nipple
(3). Bring vacuum down to 20 in. Hg.
Insert valve gage block (9) between
gage boss (10) and wide-open stop
screw (8) on throttle lever (7). Rotate
and hold throttle lever against valve
gage block.
Loosen 2 screws (6), if not already
loose.
Slowly rotate transmission
vacuum valve (5) clockwise (toward
front of truck) until vacuum gage
reads 8 in. Hg.
Hold transmission
vacuum valve in this position, and
tighten 2 screws.
Check adjustment by releasing throttle
lever (7) then rotating throttle lever
against valve gage block (9). If
vacuum gage does not read 8 in. Hg,
loosen 2 screws (6) and repeat steps
2-5.
6.
Disconnect vacuum source and vacuum gage.
7.
Connect vacuum hose connector (2) to transmission vacuum valve (5).
FOLLOW-ON TASKS:
Install air cleaner. (See paragraph 3-9)
TA701830
Change 2
3-64.1 /(3-64.2 blank)
