Dodge RAM TRUCK 1500 1995 Service Manual page 173

B R
BRAKES
BRAKES 5 - 1
C O N T E N T S
page
ALL-WHEEL ANTILOCK BRAKE SYSTEM (ABS) . 36
DISC BRAKES 48
DRUM BRAKES 63
GENERAL INFORMATION 1
MASTER CYLINDER 9
PARKING BRAKES 73
POWER BRAKE BOOSTER—BRAKE PEDAL—
BRAKELIGHT SWITCH 16
page
POWER BRAKE VACUUM PUMP (DIESEL
MODELS) 21
REAR WHEEL ANTILOCK BRAKE (RWAL)
SYSTEM ?M
SERVICE BRAKE DIAGNOSIS 3
SPECIFICATIONS 77
G E N E R A L I N F O R M A T I O N
INDEX
page
Antilock Brake Systems 1
Brake Fluid/Lubricants/Cleaning Solvents 2
Brake Safety Precautions 2
SERVICE BRAKE COMPONENTS
All BR models are equipped with power assisted,
front disc and rear drum brakes. Rear wheel antilock
(RWAL) brakes are standard. All-wheel antilock
(ABS) brakes are available as an option.
Front Disc Brakes
Front disc brakes consist of single piston calipers,
semi metallic brakelining, and vented disc brake ro­
tors.
Three different calipers are used. They are identi­
fied by caliper piston diameter and model application
which are:
• calipers on 1500 models have a 75 mm (2.95 in.)
piston
• calipers on 2500 models have an 80 mm (3.1 in.)
piston
• calipers on 3500 models and 2500 4x4 models with
Dana 60 front axle, have an 86 mm (3.385 in.) piston
Rear Drum Brakes
Rear drum brakes are dual shoe units with an au­
tomatic adjustment mechanism. Three different
drum brake assemblies are used:
• 1500 models have 11 x 2 in. rear drum brakes
• 2500 models have 13 x 2.5 in. rear drum brakes
• 3500 models have 13 x 3.5 in. rear drum brakes
page
Brake Warning Lights 2
Model Identification 2
Service Brake Components . . . . . . . . . . . . . . . . . . . 1
Brakelining Material
Factory installed front and rear brakelining is as­
bestos free. Service replacement brakelining from the
Mopar parts system will also be asbestos free.
Master Cylinder/Power Brake Booster
A two section master cylinder and tandem (dual)
diaphragm, vacuum power brake booster is used for
all applications.
The master cylinder on all models is serviceable.
Models with the Cummins diesel engine, are also
equipped with a vacuum pump. The pump supplies
the vacuum necessary for power booster operation.
Combination Valve
A combination valve is used on all models. The
valve consists of a front brake metering (hold-off)
valve and a front/rear pressure differential switch.
ANTILOCK BRAKE SYSTEMS
A rear wheel antilock (RWAL) brake system is
standard on all models. An all-wheel antilock brake
system (ABS) is available as an option. Both antilock
systems are manufactured by the Kelsey-Hayes Cor­
poration.
The RWAL and ABS antilock systems are designed
to prevent wheel lockup during periods of high wheel