Midland SIDE DUMP GRAVEL TRAILER, Руководство оператора

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5.2.9 SLACK ADJUSTERS (cont'd)
5.2.9.2 AUTOMATIC SLACK ADJUSTER MAINTENANCE (cont'd)
Free Stroke Above the Range
If the free stroke is above the range and the applied stroke is too long, there is a problem with the foundation
brake or the adjuster. Check the following:
A
(Fully Retracted)
B
(Drum Contact Using a Lever)
C
(Brake Application at 90-100 PSI
reservoir pressure.)
Free Stroke = B minus A
Applied Stroke = C minus A
Figure13
Stroke Measurements
(taken from face of air
chamber to center of
clevis pin)
Free Stroke Above the Range
If the free stroke is above the range and the applied stroke is too long, there is a problem
with the foundation brake or the adjuster. Check the following:
Component Cause Action
Camshaft Binding Remove, replace, lubricate camshaft
Camshaft bushings Excessive movement Remove and replace cam bushings per OEM specs
Camshaft bushings Binding shaft Lubricate camshaft bushings or replace
Air chamber return springs Broken, weak, missing Replace chamber
Air chamber push rod Binding on chamber housing Check adjuster for proper shimming and air chamber
position for proper adjuster arm length
Air system Not exhausting completely Check for cause of air problem and repair
Shoe return springs Broken, weak, missing Replace springs
Automatic brake adjuster Unknown Check automatic brake adjuster for proper
installation. Refer to Installation Instructions at
Automatic brake adjuster Unknown Refer to Automatic Brake Adjuster Checking
Procedures and Operational Check at www.haldex.com.
Free Stroke Below the Range
If the free stroke is less than 3/8”, a dragging brake can occur. Check the following:
Component Cause Action
Wheel bearing Out of adjustment Readjust per OEM specs
Automatic brake adjuster Unknown Check automatic brake adjuster for proper control
arm position. Refer to Installation Instructions at
Automatic brake adjuster Unknown Refer to Automatic Brake Adjuster Checking
Procedures and Operational Check .
8
www.haldex.com.
www.haldex.com.
at www.haldex.com