Chrysler 300M Service Manual page 154

LH
PROPORTIONING VALVE (Continued)
(8) Remove nut and screw securing transmission
control module to vehicle (Fig. 82).
Fig. 82 Transmission Control
Module (TCM)—Removal/Installation
1 - RADIATOR UPPER SUPPORT
2 - TCM
(9) Lift the transmission control module (with
speed control servo attached) from its mount leaving
its wiring harness attached. Move it off to the side
toward the engine making sure not to strain the
wires and speed control servo cable.
(10) Clean any debris away from the fittings on
top of the junction block.
(11) Using the following figure, remove the chassis
brake tube leading to either the left rear or right
rear brake at the junction block (Fig. 83).
Fig. 83 Junction Block Fitting Identification
1 - FROM MASTER CYLINDER PRIMARY
2 - FROM MASTER CYLINDER SECONDARY
3 - TO LEFT FRONT BRAKE
4 - TO RIGHT REAR BRAKE
5 - TO LEFT REAR BRAKE
6 - TO RIGHT FRONT BRAKE
BRAKES - BASE BRAKE SYSTEM 5 - 47
(12) If the left rear proportioning valve is suspect,
install Adapter, Special Tool 8494-3, in its place on
the junction block.
(13) If the right rear proportioning valve is sus-
pect, install Adapter, Special Tool 8494-4, in its place
on the junction block.
(14) Install a Pressure
C-4007-A, to the Adapter.
(15) Tighten all tube nut fittings to 17 N·m (145
in. lbs.) torque.
(16) Bleed any air out of the system. This includes
bleeding the air from the hose between the pressure
test fitting and pressure gauge, which is done at the
pressure gauge.
(17) With the aid of a helper, apply pressure to the
brake pedal until reading on proportioning valve
inlet gauge (at master cylinder) is at the pressure
shown on the chart at the end of this procedure.
Then check the pressure reading on the proportion-
ing valve outlet gauge (at junction block outlet to
rear brake). If proportioning valve outlet pressure
does not agree with value shown on the chart (once
inlet pressure shown on chart is obtained), replace
the junction block (with internal proportioning
valves) (Refer to 5 - BRAKES - BASE/HYDRAULIC/
MECHANICAL/JUNCTION BLOCK - REMOVAL). If
pressure is within specifications, do not replace pro-
portioning valve and perform the following steps.
(18) Remove the Pressure Gauge and Adapter,
Special Tool 8494-3 or 8494-4, from junction block.
(19) Reinstall the chassis brake tube to the junc-
tion block port. Tighten tube nut fitting to 17 N·m
(145 in. lbs.) torque.
(20) Install the transmission control module (with
speed control servo attached) in its normal position
(Fig. 82). Install the nut and screw securing it in
place.
(21) Install the transmission
mounting nut and screw securing it in place. Tighten
the screw to 6 N·m (45 in. lbs.). Tighten the nut to 12
N·m (107 in. lbs.) torque.
(22) Install the screw attaching the washer filler
tube to the upper radiator closure panel (Fig. 81).
(23) Install the screw attaching the speed control
servo to the upper radiator closure panel (Fig. 81).
(24) Remove the Pressure Gauge and Adapter from
master cylinder.
(25) Install the brake tube to the master cylinder
primary or secondary port. Tighten the tube nut to a
torque of 17 N·m (145 in. lbs.).
(26) Bleed the affected brake line. (Refer to 5 -
BRAKES - BASE - STANDARD PROCEDURE)
Gauge, Special Tool
control module