Automatic Brake Adjusters

An automatic slack adjuster (also called a brake adjuster) is a mechanical component in the air brake system. This component adjusts the brakes automatically, as needed, while the vehicle is in operation. These adjustments are necessary to compensate for the wear in the brake shoes that is caused by the normal operation of the braking system.

According to Federal Motor Vehicle Safety Standard No. 121, if a vehicle is equipped with an air brake system was manufactured after October 20, 1994 it must be equipped with an automatic slack adjuster. Vehicles manufactured before this date may use a manual slack adjuster.

Automatic Slack Adjuster
 

According to this notice, issued by the National Institute for Occupational Safety and Health: Manually adjusting an automatic slack adjuster can contribute to the unexpected failure of the braking system.


Part #: CS52358 Slack Adjuster 1.25 inch - 10 Spline, 5.5 inch Span - CS52358
Genuine Haldex auto-check automatic slack adjuster with 1.25 inch Camshaft Diameter, 10 Spline, 5.5 inch Arm Span, 5/8 inch - 18 clevis thread, 20/24 chamber size.
Your Price
$89.29
List Price
$171.71
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$82.42
Part #: CS52360 Slack Adjuster 1.25 inch - 10 Spline, 5.5 inch Span - CS52360
Genuine Haldex auto-check automatic slack adjuster with 1.25 inch Camshaft Diameter, 10 Spline, 5.5 inch Arm Span, 1/2 inch - 20 clevis thread, 16 chamber size.
Your Price
$89.29
List Price
$171.71
You Save
$82.42
Part #: CS52330 Slack Adjuster 1.25 inch - 10 Spline, 5.5 & 6.5 inch Span - CS52330
Genuine Haldex automatic slack adjuster with 1.25 Camshaft Diameter, 10 Spline, 5.5 & 6.5 inch Arm Span, 5/8 inch - 18 clevis thread.
Your Price
$89.29
List Price
$171.71
You Save
$82.42
Part #: CS56037 Slack Adjuster 1.25 inch - 24 Spline, 5 inch Span - CS56037
Genuine Haldex automatic slack adjuster with 1.25 inch Camshaft Diameter 24 Spline, 5 inch Arm Span. For Truck/Tractor Applications, 5/8 inch - 18 & 1/2 inch - 20 collar lock thread.
Your Price
$92.60
List Price
$178.08
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$85.48
Part #: CS52337 Slack Adjuster 1.25 inch - 24 Spline, 5 & 6 inch Span - CS52337
Genuine Haldex automatic slack adjuster with 1.25 Camshaft Diameter, 24 Spline, 5 & 6 inch Arm Span, 5/8 inch - 18 clevis thread.
Your Price
$89.29
List Price
$171.71
You Save
$82.42
Part #: CS56038 Slack Adjuster 1.25 inch - 24 Spline, 5.5 inch Span - CS56038
Genuine Haldex automatic slack adjuster with 1.25 inch Camshaft Diameter 24 Spline, 5.5 inch Arm Span. For Truck/Tractor Applications, 5/8 inch - 18 & 1/2 inch - 20 collar lock thread.
Your Price
$92.60
List Price
$178.08
You Save
$85.48
Part #: CS56054 Slack Adjuster 1.25 inch - 24 Spline, 5.5 inch Span - CS56054
Genuine Haldex automatic slack adjuster with 1.25 inch Camshaft Diameter, 24 Spline, 5.5 inch Arm Span. For Truck/Tractor Applications, 1/2 inch - 20 collar lock thread, 5/8 inch offset.
Your Price
$96.68
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$185.92
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$89.24
Part #: CS56055 Slack Adjuster 1.25 inch - 24 Spline, 5.5 inch Span - CS56055
Genuine Haldex automatic slack adjuster with 1.25 inch Camshaft Diameter, 24 Spline, 5.5 inch Arm Span. For Truck/Tractor Applications, 5/8 inch - 18 collar lock thread, 5/8 inch offset.
Your Price
$96.68
List Price
$185.92
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$89.24

Popular Automatic Slack Adjusters

Part #: SA22103 Slack Adjuster 1.5 - 28 Spline, 5 inch & 6 inch Span - SA22103
A Crewson Brunner type automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 5 inch & 6 inch Arm Span.
Your Price
$64.42
List Price
$125.84
You Save
$61.42
Part #: SA22102 Slack Adjuster 1.5 - 28 Spline, 5.5 inch & 6.5 inch Span - SA22102
A Crewson Brunner type automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 5.5 inch & 6.5 inch Arm Span.
Your Price
$64.42
List Price
$125.84
You Save
$61.42
Part #: SA21103 Slack Adjuster 1.5 - 10 Spline, 5 inch & 6 inch Span - SA21103
A Crewson Brunner type automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 5 inch & 6 inch Arm Span.
Your Price
$64.42
List Price
$125.84
You Save
$61.42
Part #: CS52343 Slack Adjuster for 12-1/4 inch Brake 1.5 inch - 28 Spline, 5 & 6 inch Span - CS52343
Genuine Haldex automatic slack adjuster for 12-1/4 inch brake with 1.5 inch Camshaft Diameter, 28 Spline, 5 & 6 inch Arm Span. For Low Boy Applications, 5/8 inch - 18 clevis thread, curved offset.
Your Price
$82.04
List Price
$157.76
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$75.72
Part #: CS56040 Slack Adjuster 1.5 inch - 28 Spline, 5.5 inch Span - CS56040
Genuine Haldex automatic slack adjuster with 1.5 inch Camshaft Diameter 28 Spline, 5.5 inch Arm Span. For Truck/Tractor Applications, 5/8 inch - 18 & 1/2 inch - 20 collar lock thread.
Your Price
$92.60
List Price
$178.08
You Save
$85.48

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