Bendix Commercial Vehicle Systems M-12R ANTILOCK MODULATOR - Manual (Page 7)

7
TYPICAL M-12R ™ MODULATOR TYPICAL M-12 ™ MODULATOR
FOUR PIN
CONNECTOR
THREE PIN
CONNECTOR
SHORT WIRE
HARNESS
BETWEEN THREE
AND FOUR PIN
CONNECTOR
(M-12R ™
MODULATOR
ONLY)
EXHAUST
COMMON
HOLD
SHORT WIRE HARNESS USED ON THE M-12R ™ MODULATOR
Black
White
WHITE BLACK
FIGURE 7 M-12 ™ /M-12R ™ MODULATOR CONNECTORS & WIRE HARNESS
3. Reconnect all air lines and wiring cables to the modulator
or modulator/controller assembly using the identification
made in MODULATOR REMOVAL, step 1.
4. Test all air fittings for excessive leakage and tighten as
necessary.
DISASSEMBLY - REFER TO FIGURE 8
The following disassembly and assembly procedure is
presented for reference purposes only. A complete
disassembly and assembly is described in detail, and it is
assumed that the appropriate maintenance kit(s) is on hand.
Several replacement parts and maintenance kits are
available which do not require full disassembly. The
instructions provided with these parts and kits should be
followed in place of the instructions presented here.
CAUTION: The M-12 ™ /M-12R ™ may be lightly clamped in a
bench vise during disassembly. However, over clamping will
result in damage, leakage, and/or malfunction. If a vise is to
be used, position the M-12
™ /M-12R ™ so the jaws bear on
the flat area of the supply port and its opposing side of the
body.
1. Remove all air fittings and plugs from the valve.
2. Mark the relationship of the electronic controller and
solenoid assembly to the body.
Note: Only the M-12
™ modulator will have a controller
installed directly on the solenoid assembly. The M-12R ™
modulator will only have a cover plate enclosing the
solenoid assembly.
If a mounting bracket was used, mark the position of the
bracket on the unit.
3. Remove and retain the four cap screws that hold the
controller (M-12 ™ modulator) or cover plate (M-12R ™
modulator) to the solenoid assembly. Then carefully lift
the controller or cover plate from the solenoid
assembly(3). The controller will be attached to the
modulator by a four pin connector. Press the lock tab on
the side of the connector and pull the connector from its
socket in the controller. Now separate the controller or
cover plate from the modulator. Remove the gasket(1)
that seals the controller or cover plate to the solenoid
assembly(3).
Remove the four cap screws(2) that secure the solenoid
assembly(3) to the valve body(7). Separate the solenoid
assembly from the valve body, and remove sealing ring(4)
from the protrusion on the bottom of the solenoid
assembly.
4. Remove retaining ring(14), then remove the exhaust
assembly(13). Remove o-ring(11) and o-ring(12) from the
O.D. and l.D., respectively, of the exhaust assembly(13).
5. Remove spring(10) and inlet/exhaust assembly(8).
Remove the spring seat(9) from the inlet exhaust
assembly.