TM 9-2320-289-347-3.POWER BOOSTER REPAIR (Con’t).c.ASSEMBLY NOTEEnsure that all seals, “O” rings, and metal friction points are lubricatedwith hydraulic fluid before assembly.1.Install two-function valve (31) into back of housing (9). Install new “O“ ring (30) onto dumpvalve (28) and install over two-function valve. Ensure that dump valve plunger is held in placeuntil installation is completed. Install accumulator valve (33).2 .Install cover (20) in vise with bracket end down. Install new cover seal (19) into groove oncover.3 .Install new seal(s) (18) on rod and piston unit (17). insert rod and piston unit into bore in cover(20). Install locknut (21 ) and pedalrod (22) onto rod and piston unit (M1009). Install grommet(23) on pedalrod and force into rod and piston unit (all except M1009).4.Install new piston seal (15) in bore. Lip of seal must be toward rear (away from master cylindermounting flange), Ensure that seal is fully seated in housing (9).TA503827-12
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