BRAKES
BASE BRAKE SYSTEM
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
BASE BRAKE SYSTEM .....................1
DIAGNOSIS AND TESTING
PROPORTIONING VALVE ...................1
REMOVAL AND INSTALLATION
SERVICE WARNINGS AND CAUTIONS .........3
DISC BRAKE CALIPER (FRONT) ..............3
DISC BRAKE SHOES (FRONT) ...............5
SPECIFICATIONS
BRAKE FASTENER TORQUE
SPECIFICATIONS ........................7
SPECIAL TOOLS
BASE BRAKE SYSTEM .....................7
DESCRIPTION AND OPERATION
BASE BRAKE SYSTEM
DESCRIPTION
The service procedures in this group are published
for the overseas market. Most base brake system ser-
vice procedures are the same for all LH vehicles how-
ever, if differences are present they will be called out
in this group of the service manual. Refer to Group 5,
Brakes for additional information not covered in this
manual.
DIAGNOSIS AND TESTING
PROPORTIONING VALVE
PROPORTIONING VALVE TEST (WITH AND
WITHOUT ANTILOCK BRAKES)
CAUTION: Not all components use the same type
tubing flare. The tube leading into the proportioning
valve has an ISO flare, while the flex hose coming
out of the proportioning valve has a standard dou-
ble-inverted flare. Use the correct adapters when
installing gauges to test proportioning valves.
Both vehicles, with Antilock Brakes, and without
Antilock Brakes, have two proportioning valves. One
valve is connected to each rear flex hose. One propor-
tioning valve controls the right rear brake, and the
other proportioning valve controls the left rear brake.
On vehicles without ABS, if premature wheel skid
occurs on a hard brake application, it could be an
indication that a malfunction has occurred with one
of the two rear brake proportioning valves. Test the
valve that controls the side of the vehicle on which
the skid occurs.
On vehicles with ABS, if premature rear wheel
ABS cycling occurs on a hard brake application, it
could be an indication that a malfunction has
occurred with one of the two proportioning valves.
Since ABS cycles both rear brakes together, both
valves must be tested to isolate the suspect propor-
tioning valve.
(1) Raise the vehicle on jack stands or centered on
a hoist. See hoisting in the Lubrication and Mainte-
nance section of this manual.
(2) Clean any debris away from the suspect pro-
portioning valve, connections, and area.
(3) Remove the chassis brake tube (Fig. 1) from
the suspect proportioning valve.
(4) Remove the proportioning valve from the rear
flex hose which is held stationary by a bracket
mounted on the back side of the crossmember.
LH BRAKES 5 - 1
2000 LHS, 300M, CONCORDE AND INTREPID
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