POWER BOOSTER REPAIR (Cont).
Ensure that all seals, O rings, and metal friction points are lubricated
with hydraulic fluid before assembly.
Install two-function valve (31) into back of housing (9). Install new O ring (30) onto dump
valve (28) and install over two-function valve. Ensure that dump valve plunger is held in place
until installation is completed. Install accumulator valve (33).
Install cover (20) in vise with bracket end down. Install new cover seal (19) into groove on
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).
Install new piston seal (15) in bore. Lip of seal must be toward rear (away from master cylinder
mounting flange), Ensure that seal is fully seated in housing (9).