Chapter 6.0: Adjustment

6.1: Following any adjustment or repair of the brake, test operation of the brake as described under “Operational test”, Chapter 8.

6.2: Complete adjustment is required following any rework where any settings were disturbed.

Table 1

 

 

TYPICAL RUNNING

 

 

BRAKE WHEEL

CLEARANCE

MAXIMUM FULL

 

BETWEEN LINING

SPEED BRAKE

 

SIZES (Inches)

AND BRAKE

WHEEL run-out

 

 

WHEEL (Inches)

(Inches)

 

6

0.014

0.006

 

8

0.016

0.008

 

10

0.020

0.010

 

13

0.026

0.013

 

16

0.032

0.016

 

19

0.038

0.019

 

 

 

 

 

Notes:

 

 

 

1. Refer to “Brake Installation” and “Replacing the Brake Shoes” for adjustment

 

instructions.

 

 

 

2. Evaluate brake wheel run-out at full speed. It must not exceed value shown in this

 

table.

 

 

6.3: Manual Operation

 

 

6.3.(a): Brake installation, shoe replacement, and actuator replacement, described elsewhere, require the brake to be released and reapplied without energizing the actuator. When type “S” Latching Hand Release is fitted, it can be used; or it can be manually over-ridden as follows:

6.3.(b): Brakes without Automatic Adjustment:

6.3.(b).(i): To manually release the brake: Adjust the brake rod hex-nuts – to increase the brake rod length – reducing the “reserve stroke” until the piston rod is no longer visible. Continue adjustment until there is sufficient lining to brake wheel clearance.

6.3.(c): To manually apply the brake: Adjust the brake rod hex-nuts – to decrease the brake rod length – increasing the “reserve stroke” until the linings contact the brake wheel. Continue until the brake release lever begins to rise. Proceed to “Actuator Stroke Adjustment”.

6.3.(d): Brakes with Automatic Adjustment:

6.3.(e): To manually release the brake: Refer to Fig. 2A, withdraw drive pin (E), then carefully rotate the mechanism by hand to increase the brake rod length and, at the same time, reduce the reserve stroke until the piston rod is no longer visible. Continue adjustment until there is sufficient shoe/wheel clearance.

6.3.(f): To manually apply the brake: Refer to Fig. 2A and withdraw drive pin (E), then rotate the mechanism by hand to decrease the effective brake rod length until the linings contact the wheel and the brake lever begins to rise. Proceed to “Actuator Stroke Adjustment”.

8/17/2006

Page 16 of 33

MST/E Electric Shoe Brakes Manual

 

 

560022-R6