Chrysler RAM TRUCK 2500 1994 Service Manual page 174

• POWER BRAKE BOOSTER—BRAKE PEDAL—BRAKELIGHT SWITCH i - 15
POWER BRAKE BOOSTER—BRAKE PEDAL—BRAKELIGHT SWITCH
INDEX
page
Brake Pedal Installation 19
Brake Pedal Removal 18
Brakelight Switch Adjustment and Installation . . . . . 18
Brakelight Switch Removal 17
Brakelight Switch Test and Diagnosis 17
Component Description 15
COMPONENT DESCRIPTION
Power Brake Booster
All BR models are equipped with a Delco 260T,
tandem (dual) diaphragm power brake booster (Fig.
1).
Two versions of the 260T booster are used. A stan­
dard duty version is used i n all 1/2 ton models. A
higher output version is used i n 3/4 and 1 ton mod­
els.
Brake Pedal
The brake booster is operated by a suspended type
brake pedal (Fig. 2). The pedal pivots on a shaft lo­
cated i n a mounting bracket attached to the dash
page
Power Brake Booster Identification 15
Power Brake Booster Installation 17
Power Brake Booster Operation 16
Power Brake Booster Removal 16
Power Brake Booster Serviceability 16
panel. The pedal shaft is supported by bushings i n
the pedal and mounting bracket.
Brakelight Switch
A plunger style, self adjusting brakelight switch is
used for all applications. The switch is positioned i n
a separate bracket attached to the pedal mounting
bracket (Fig. 3).
POWER BRAKE BOOSTER IDENTIFICATION
The standard and high output boosters are identi­
fied by code letters on the forward face of the booster
(Fig. 1).
Booster I.D. code letters are as follows:
• 1/2 ton booster code is ZK
• 3/4 and 1 ton booster code is ZL
IDENTIFICATION
CODE
LOCATION
CHECK
VALVE
MASTER
CYLINDER
M O U N T I N G
STUDS
BOOSTER
PUSH ROD
{TO MASTER
CYLINDER)
INTEGRAL
M O U N T I N G
BRACKET
BOOSTER
M O U N T I N G
STUDS
BOOSTER
PUSH ROD
(TO BRAKE
PEDAL)
FRONT VIEW
SIDE VIEW REAR V I E W
J9405-20
Fig. 1 Delco 260T Power Brake Booster