TM 9-2320-289-203-21.1. TRANSMISSION VACUUM VALVE REPLACEMENT (Con’t).b.INSTALLATION 1.2.3.4.5.NOTETransmission 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 fullytighten 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) betweengage boss (10) and wide-open stopscrew (8) on throttle lever (7). Rotateand hold throttle lever against valvegage block.Loosen 2 screws (6), if not alreadyloose.Slowly rotate transmissionvacuum valve (5) clockwise (towardfront of truck) until vacuum gagereads 8 in. Hg.Hold transmissionvacuum valve in this position, andtighten 2 screws.Check adjustment by releasing throttlelever (7) then rotating throttle leveragainst valve gage block (9). Ifvacuum gage does not read 8 in. Hg,loosen 2 screws (6) and repeat steps2-5.6.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)TA701830Change 23-64.1 /(3-64.2 blank)
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