BENDIX BW7506 User Manual download pdf

WARNING

SPRING BRAKE CHAMBERS CONTAIN A LOADED

COMPRESSION SPRING. PROPERTY DAMAGE,

SERIOUS INJURY OR DEATH MAY OCCUR IF THESE

INSTRUCTIONS ARE NOT FOLLOWED COMPLETELY.

NEVER attempt to remove a spring chamber crimped

band.

Follow all industry safe maintenance practices, including

those listed on page two of these instructions.

1.0 DESCRIPTION

The Bendix

EverSure

spring brake is made up of a

conventional brake chamber and an emergency, or parking,

spring mechanism for use on vehicles equipped with cam

foundation brakes. The spring brake actuator provides:

(1) service braking, (2) parking and (3) emergency

braking. The actuator can be piped with various system

arrangements to be automatically, or manually, applied

under emergency braking conditions.

The spring brake is a diaphragm-type actuator which

converts the energy of air pressure into mechanical force.

FIGURE 1 - BENDIX

EVERSURE

SPRING BRAKE

Bendix

EverSure

Spring Brake with No Touch

™

Technology

SD-02-4525

PARKING/ EMERGENCY

BRAKE HOUSING

NON-SERVICEABLE

NO TOUCH

™

POWER

SPRING

SERVICE

PUSH-ROD

SERVICE RETURN

SPRING

SERVICE

CHAMBER

RELEASE

TOOL T-BOLT

T-BOLT

STORAGE

POCKET

NON-PRESSURE

HOUSING

YOKE

SERVICE

DIAPHRAGM

CLAMP

BAND

NON-SERVICEABLE

PARKING DIAPHRAGM

NON-SERVICEABLE

SECTION SEALED WITH A

CRIMPED BAND

DUST CAP INSTALLED

DUST CAP

REMOVED

RELEASE

TOOL

T CAP

Index

Section Page

1.0 Description . . . . . . . . . . . . . . . . .1, 3

2.0 Safe Maintenance Practices . . . . . . . . . 2

3.0 Preventive Maintenance . . . . . . . . . . . 3

4.0 Operation and Leakage Tests. . . . . . . . . 4

5.0 Operation: General . . . . . . . . . . . . . . 4

6.0 Mechanical Release (Caging) of the

Bendix

EverSure

Spring Brake . . . . . . . 4

7.0 Clocking (Rotating) the Bendix Service

Replacement Spring Brake Chamber. . . . . 5

8.0 Mechanical Release (Caging) and Removal

of the Piggyback Spring Brake Chamber to

be Replaced . . . . . . . . . . . . . . . . . 6

9.0 Installing the Bendix

EverSure

Piggyback

Spring Brake Chamber . . . . . . . . . . . . 6

10.0 Un-Caging the Bendix

EverSure

Spring

Brake Chamber (Apply Park Brake) . . . . . 7

11.0 Removal and Installation of the Combination

Spring Brake . . . . . . . . . . . . . . . . . 7

12.0 Replacing the Service Diaphragm . . . . . . 8

(Piggyback spring brake components

are not serviceable, and are shown

here for informational purposes only.)

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - SD-02-4525

1® WARNINGSPRING BRAKE CHAMBERS CONTAIN A LOADED COMPRESSION SPRING. PROPERTY DAMAGE, SERIOUS INJURY OR DEATH MAY OCCUR IF THESE INS

Page 2 - FOLLOW THESE INSTRUCTIONS TO

22.0 SAFE MAINTENANCE PRACTICES WARNING! PLEASE READ AND FOLLOW THESE INSTRUCTIONS TO AVOID PERSONAL INJURY OR DEATH:When working on or around a vehic

Page 3 - 3.0 PREVENTIVE MAINTENANCE

3The diaphragm is held between the adapter base and non-pressure plate by a two piece clamp ring. Different size brake chambers are identiﬁ ed by num

Page 4 - 4.2 LEAKAGE TEST

4FIGURE 3 - SPRING BRAKE CUT-AWAY VIEWPARKING/EMERGENCYPORT (MARKED “12”)NON-PRESSUREHOUSINGPUSH RODDIAPHRAGMDIAPHRAGMMAIN SPRING4.0 OPERATION & L

Page 5 - SPRING BRAKE CHAMBER

5FIGURE 4 - EXPLODED VIEW SHOWING SERVICEABLE AND NON-SERVICEABLE PORTIONS OF THE BRAKE SERVICEABLE SECTIONSERVICE RETURN SPRINGNON-SERVICEABLE PIGGYB

Page 6 - INCORRECT CORRECT

6 WARNINGDo not mechanically release (cage) the spring if there is any structural damage to the brake. Caging the spring in such a chamber may cause s

Page 7 - REPLACEMENT BRAKE CHAMBER

79.4 Assemble the service clamp assembly. Ensure all parts are seated properly and remain centered (See Figure 5).9.5 Torque the clamp nu

Page 8

811.3.2 If the service replacement is a type that provides an extra-long threaded push rod, thread a nut onto the rod past the point that it will nee