Hino 600, Руководство по ремонту, Страница: 305 / 451

SERVICE BRAKE (FULL AIR BRAKE) BR02–27
6. ASSEMBLY
Prior to reassembling, lubricate all o-rings, o-ring grooves, piston
bores, and metal to metal moving surfaces with Dow Corning 55 o-
ring lubricant (Bendix piece number 291126).
IMPORTANT
All torques specified in this manual are assembly torques and can be
expected to fall off, after assembly is accomplished. Do not retorque
after initial assembly torques fall.
(1) Install the primary inlet and exhaust assembly (33) in the upper body
and replace the retaining ring (32) to secure it. Be sure the retaining
ring is seated completely in its groove.
(2) Install the large and small o-rings (30 & 31) on the relay piston (20).
(3) For E-8P: Install o-ring (28) in the primary piston (22) o-ring groove.
(4) For E-8P: Install the rubber spring (do not lubricate) (27), concave
side down in the primary piston (22) and place the spring seat (26),
flat side up, over the rubber spring.
(5) For E-8P: Install the primary piston spring seat nut (25), with its hex
closest to the spring seat, and rotate clockwise until the top surface of
the spring seat is even with the top surface of the piston. Set aside.
(6) Place relay piston spring (21) in concave portion of relay piston (20)
and install relay piston through primary inlet/exhaust assembly (33)
into under side of upper body.
(7) Place screwdriver, blade up, in vise. Insert stem (17) through the relay
piston upper body sub assembly, slide this assembly over the blade of
the secured screwdriver, engage the screwdriver blade in the slot in
the head of the stem.
(8) Place the washer (24) over the stem (17) and on top of the relay pis-
ton (20).
(9) Install primary return spring ( E-8P: 23) in upper body piston bore.
(10) For E-8P: Install the primary piston rubber spring sub assembly (1.
(4) and (5)) over the stem, into the up-per body piston bore.
(11) Compress piston(s) ( For E-8P: the relay piston (20)) and retaining
ring into the upper body from either side and hold compressed, either
manually or mechanically.
See the cautionary note under 3. (7) in
the Disassembly section of this manual.
(12) Place the stem spring (19) ( E-8P: place over the spring seat nut (25)),
the spring seat (18) (concave side up) and lock nut (16) on the stem
(17). Torque to 20-30 inch pounds.
(13) For E-8P: Install the primary piston retainer (15) over the piston, mak-
ing certain all three lock tabs have engaged the outer lip of the body.
(14) Replace the rubber seal ring (14) on the lower body.
(15) Install the 4 hex head cap screws securing the lower body to the
upper body. Torque to 30-60 inch pounds.
(16) Install the secondary inlet and exhaust valve assembly (13) on the
lower body.
(17) Install the screws that secure the exhaust cover (12) to the lower
body. Torque to 20-40 inch pounds.
(18) Secure the screw (9) holding the exhaust diaphragm (10) and the dia-
phragm washer (11) to the exhaust cover (12). Torque to 5-10 inch
pounds.
(19) Install all air line fittings and plugs making certain thread sealant
material does not enter valve.
7. VALVE INSTALLATION
(1) Install the assembled brake valve on the vehicle.
(2) Reconnect all air lines to the valve using the identification made dur-
ing VALVE REMOVAL step 2.
(3) After installing the brake valve assembly, perform the "OPERATION
AND LEAKAGE CHECKS" before placing the vehicle in service.