BENDIX TCH-005-001 User Manual

Technical Bulletin

Bulletin No.: PRO-05-01 Effective Date: 5/23/77 Cancels: PRO-05-01 dated 4/6/76 Page: 1 of 3

Subject: AUTOMATIC SLACK ADJUSTER INSTALLATION

INFORMATION

Every Automatic Slack Adjuster sold through the Aftermarket Division includes
BWS-582 Installation Instructions which contain important information regarding a retrofit
installation. A copy of the instruction sheet was forwarded on Bulletin 05-1 and we
suggest that you retain and carefully review the procedures.

Of particular importance is the statement on page 2 which reads:

IMPORTANT: The position of the adjusting crank and linkage (to the right or left
in Fig. #1) must not be changed in relation to the slack adjuster. Altering the
position of this mechanism (from one side to another) will cause a malfunction.

Also, to insure proper operation, it is recommended that the Bendix Automatic Slack
Adjuster be used in retrofit installations only with chamber sizes of Type 16 or larger.

The Bendix “Sure Stroke” Automatic Slack Adjuster is a device with great sales potential
to the OE specification and retrofit market. However, as with any new device, proper
installation is of prime importance. If you have any questions regarding installation of
the “Sure Stroke”, please contact your Bendix HVSG representative.

The Bendix Sure Stroke Automatic Slack Adjuster can easily replace most standard
slack adjuster installations providing some simple considerations are kept in mind.

#1. Check to be sure that the Bendix Sure Stroke you have selected has the same arm
length as the standard slack adjuster it is replacing. (This measurement can be
determined by measuring from the center of the yoke pin to the center of the cam shaft
spline.)

#2. Inspect the foundation brake. All components should be in good working condition.
Excessive drum out of roundness may result in excessive lining wear.

IMPORTANT: The position of the adjusting crank and linkage (to the right or left in
Fig. #1) must not be changed in relation to the slack adjuster. Altering the position of
this mechanism (from one side to another) will cause malfunction.

Installing the Sure Stroke

1. Block the wheels of the vehicle and manually cage all Spring Brake Actuators.

2. Remove the standard slack adjuster and brake chamber yoke assembly.

3. Install the Sure Stroke in the following manner:
A. Install the Sure Stroke on the foundation brake camshaft.
B. Run the brake chamber push rod lock nut up the push rod and remove the yoke

adapter from the yoke. Install it on the push rod as shown in Fig. #2 below.