Hino 600, Workshop Manual, Page: 255 / 451

SERVICE BRAKE (HYDRAULIC BRAKE) BR02–11
5. REMOVE THE HYDRO-MAX BOOSTER
(1) Remove the stop light switch cover.
(2) Remove the clevis pin to disconnect the brake pedal, stop light switch
and push rod.
(3) Remove the Hydro-Max booster tightening nuts.
(4) Move the master cylinder forward to allow for the Hydro-Max booster
removal and support it in that position.
(5) Remove the Hydro-Max booster.
IMPORTANT POINTS-DISASSEMBLY
1. REMOVE THE BACKUP PUMP
(1) Remove the two tightening bolts.
(2) Remove the backup pump and adapter.
! CAUTION
Do not damage the contact surface.
NOTICE
The power steering fluid will drain out from Hydro-Max booster.
(3) Remove and discard the four face seals.
(4) Remove the check ball. (If necessary)
2. REMOVE THE FLOW SWITCH ASSEMBLY
(1) Remove the flow switch.
(2) Remove and discard the O-ring from the flow switch.
(3) Using a small magnet, remove the flow piston and spring.
3. REMOVE THE INLET CHECK VALVE
(1) Using a hook wire remove and discard the inlet check valve seat with
O-ring from inlet port.
(2) Remove the check ball.
4. USE CLEAN POWER STEERING FLUID FOR CLEANING THE
REUSED PARTS AND NEW SEALS
! CAUTION
Do not use brake fluid.
Stop light
switch cover
Stop light switch
Pin
SAPH168010200011
Fece seal
Retainer
Check ball
Adapter
Backup pump
SAPH168010200012
O-ring
Spring
Flow switch
Flow piston
SAPH168010200013
Check ball
O-ring
Check valve seat
SAPH168010200014