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  1. Haldex
  2. Sirco
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  1. Straight
  1. 1.25 inches
  2. 1.50 inches
  3. 1.62 inches
  1. 10
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  1. 5.00 inches
  2. 5.50 inches
  3. 6.00 inches
  4. 6.50 inches
  1. 6.00 inches
  2. 6.50 inches
  3. 7.00 inches
Part#: 40020222

Availability: Typically ships in 5 to 7 business days.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 5 inch Arm Span. OEM #: 409-20037
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):5.00 inches
  • Cross References:409-20037


Part#: 40020223

Availability: 2 In Stock as of 5/1/2016 3:21:10 PM EST.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 6 inch Arm Span. OEM #: 409-20005
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):6.00 inches
  • Cross References:409-20005


Part#: 40020224

Availability: Typically ships in 5 to 7 business days.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 5 inch Arm Span. OEM #: 409-20038
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):5.00 inches
  • Cross References:409-20038


Part#: 40020225

Availability: Typically ships in 5 to 7 business days.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 5.5 inch Arm Span. OEM #: 409-20001
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):6.00 inches
  • Cross References:409-20007


Part#: 40020226

Availability: Typically ships in 5 to 7 business days.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 5.5 inch Arm Span. OEM #: 409-20001
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):5.50 inches
  • Cross References:409-20001


Part#: 40020227

Availability: Typically ships in 5 to 7 business days.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 5.5 inch Arm Span. OEM #: 409-20009
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.50 inches
  • Cross References:409-20003


Part#: 40020228

Availability: Typically ships in 5 to 7 business days.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 5.5 inch Arm Span. OEM #: 409-20017
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):5.50 inches
  • Cross References:409-20017


Part#: 40020229

Availability: Typically ships in 5 to 7 business days.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 5.5 inch Arm Span. OEM #: 409-20018
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.50 inches
  • Cross References:409-20018


Part#: 40020230

Availability: Typically ships in 5 to 7 business days.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 5.5 inch Arm Span. OEM #: 409-20018
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.50 inches
  • Cross References:409-20018


Part#: 40020231

Availability: 4 In Stock as of 5/1/2016 3:21:11 PM EST.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 5.5 inch Arm Span. OEM #: 409-20019
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.50 inches
  • Cross References:409-20019


Part#: 40020232

Availability: Typically ships in 5 to 7 business days.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 6 inch Arm Span. OEM #: 409-20020
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):6.00 inches
  • Cross References:409-20020


Part#: 40020233

Availability: Typically ships in 5 to 7 business days.
Your Price $92.91
List Price $178.68
You Save $85.77 - 48%
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 6 inch Arm Span. OEM #: 409-20021
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):6.00 inches
  • Cross References:409-20021


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.


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 #: 40020211 Slack Adjuster 1.5 inch - 28 Spline, 5.5 inch Span - 40020211
Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 5.5 inch Arm Span. OEM #: 409-20002
Your Price
$92.91
List Price
$178.68
You Save
$85.77
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 #: CB22153 Slack Adjuster for 12-1/4 inch Brake 1.5 inch - 28 Spline, 5 & 6 inch Span - CB22153
A Crewson Brunner type 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
$70.71
List Price
$120.00
You Save
$49.29

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