Operation and maintenance manual

Section 250-0050
Braking System - Brake Manifold Valve
4
SM 2158 7-02
rings (13, 15 & 17) on solenoid cartridge (2) as shown
in Fig. 1.
2. Install solenoid cartridge (2) assembly in valve body
(1) and tighten securely. Install solenoid coil (3) on
solenoid cartridge (2) and secure with locknut (4).
3. Rotate valve body (1) in vice until retainer (6) face is
up. Install new 'O' ring (18) on plug (5) and install plug
(5) assembly in valve body (1).
4. If removed, apply Loctite 603 to threads of seats
(10) and install seats (10) in valve body (1). Tighten
seats (10) to a torque of 20 Nm (15 lbf ft). See Fig. 4.
5. Install one check ball (9) on seat (10) and spring (8)
on check ball (9). Install new 'O' ring (7) on retainer (6)
and carefully place retainer (6) assembly over spring
(8) in valve body (1). Tighten retainer (6) securely in
valve body (1). See Fig. 4.
6. Repeat step 5 for second check ball, spring and
retainer assembly.
7. Install pressure switch (20) in valve body (1) as
noted during disassembly.
8. Install new 'O' rings on plugs (19). Fit plugs (19) to
valve body (1).
9. If removed, install hydraulic line connectors in valve
body (1) as noted during disassembly.
INSTALLATION
Note: Tighten all fasteners to torques listed in
Section 300-0080, STANDARD BOLT AND NUT
TORQUE SPECIFICATIONS.
Note: Tighten all hydraulic lines fitted with ORFS
connections, as described in Section 250-0000,
BRAKING SYSTEM SCHEMATIC. Renew all 'O' rings
where used.
1. Position brake manifold valve assembly to the
cradle assembly, at the rear of the cab and secure
with mounting hardware.
SM - 1508
2. Remove blanking caps from hydraulic lines and
connect to brake manifold valve as noted during
removal.
3. Connect electrical connections to solenoid coil (3)
and pressure switch (20) as noted during removal.
4. Check oil level in the hydraulic tank and add oil if
required. Refer to Section 230-0040, HYDRAULIC
TANK for correct fill level, and, Section 300-0020,
LUBRICATION SYSTEM for oil specification.
5. Place the battery master switch in the 'On' position,
remove wheel blocks, start the engine and bring
hydraulic oil to operating temperature.
6. Check brake manifold valve and hydraulic line
connections for leaks and tighten as required.
7. Shut off engine and make sure a full service brake
application is made followed by a parking brake
application.
8. Repeat all braking and engine shut down cycles
several times and check for appropriate application/
release cycle several times.
9. Check all connections again for leaks and tighten as
required.
Fig. 4 - Section Through Check Ball Assembly
6 - Retainer
7 - 'O' Ring
8- Spring
9 - Check Ball
10 - Seat
6
8
7
9
10