GILLIG LOW FLOOR, Руководство по обслуживанию

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Brakes & Wheels
273
Measuring Push Rod Stroke
The automatic slack adjusters maintain proper push rod stroke (travel) at all times. An inspection should
be performed during routine maintenance intervals to measure the push rod stroke. The push rod stroke
for the Low Floor bus should be:
Front brake (type 24L brake chamber): 1 to 2.0 inches
Rear brake: (type 3036 brake chamber): 1-3/4 to 2-1/4 inches
If the pushrod stroke exceeds the maximum stroke listed above, do not manually adjust the slack. See
“Automatic Slack Adjuster Checking Procedures” to determine if the adjuster requires replacement.
Measure the stroke using the following procedure (see Figure 7-3):
1. Measure the length from the face of the air chamber to the end of the yoke pin while the brake is
released.
2. Have another person apply the brakes at 90–100 psi. To obtain 90–100 psi of air pressure in the
braking system:
a. Start the engine.
b. Build air pressure to 100 psi and then turn off the engine . If above 100 psi, drain primary
and secondary air tanks down to 100 psi.
c. Apply and hold the service brakes.
3. Measure from the face of the brake chamber to the end of the yoke pin with the brakes applied.
4. The difference between the measurements in steps 1 and 3 is the push rod stroke. The push rod
stroke should be as short as possible without the brakes dragging.
Do not work under a vehicle supported solely by jacks. Jacks can slip
or fall over and cause injury.
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