CHAPTER 7: MAINTENANCE OF TRANSMISSION AND OUTPUT REDUCTION DRIVESTM 9-2350-256-207-1 REPLACE/SERVICE TRANSMISSION ACTUATING BRAKE AIR VALVE LINKAGE-Continuedc. ADJUSTMENTWARNINGEnsure suitable blocking is in place prior to releasing brakes.1Release brakes.2Remove cotter pin (2) and clevis pin (3) and disconnect actuating brake air valve linkage (1) from actuating brake airvalve linkage lever (4) on transmission.3Loosen two rod end locknuts (5) on actuating brake air valve linkage (1) and turn linkage rod ends (6) to adjust free length of actuating brake air valve linkage until clevis pin (3) can be inserted freely through linkage rod end and actuating brake air valve linkage lever (4), with brake air valve linkage lever in released (down) position. Tighten two rod end locknuts. Attach actuating brake air valve linkage to actuating brake air valve linkage lever with cotter pin (2)and clevis pin.NOTEMark (7) appears on linkage rod plunger (8) 3/4 inch (in.) (19.1 millimeters [mm] ) from edge of linkagerod plunger stop (9).4Apply brakes and check position of mark (7). Mark must aline with edge of linkage rod plunger stop (9).5Loosen rod end locknut (5) at lower end of actuating brake air valve linkage (1) near output reduction drive (10), and adjust linkage rod end (6) as required. Tighten rod end locknut.NOTEFollow-on maintenance:Close engine transmission access doors (see paragraph 9-55)7-2
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