Automatic Slack Adjusters

Automatic slack adjusters remove the slack in the brake linkage without the need for manual adjustment.

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  1. Haldex
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Free Ship!
SKU 40010305-I
$52.95

Haldex Type Automatic Slack Adjuster for 12-1/4 inch brake assembly applications. 1.5 inch 28 spline, 6 inch arm length, 1/2 inch arm hole diameter.   Details

5 In Stock as of September 22, 2020 10:33 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):6.00 inches
  • Automann Number:135.2842, 133.2842
  • BWP Number:M-4062
  • Dayton Number:05-651
  • Euclid Number:E-6933
  • Haldex Number:40010305, 400-10305
  • Leland Number:L3614
  • Meritor Number:R806006
  • MPN: 40010305
SKU 40020211
$111.95

Haldex Automatic Slack Adjuster. 1.5 inch 28 spline, 5.5 inch arm length, 1/2 inch arm hole diameter. Plate and Flat stud style anchor bracket.   Details

8 In Stock as of September 22, 2020 10:56 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.50 inches
  • Automann Number:135.S2840
  • Haldex Number:40020211, 400-20211, 409-20002
  • Manufacturers Part Number:409-20002
  • MPN: 409-20002
SKU 40020212
$115.00

Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 6.0 inch Arm Span. OEM #: 409-20006   Details

2 In Stock as of September 22, 2020 10:56 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):6.00 inches
  • Automann Number:135.S2841
  • Haldex Number:40020212, 400-20212, 409-20006
  • MPN: 40020212
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SKU 40020212-I
$69.95

Haldex type self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 6.0 inch Arm Span. OEM #: 409-20006   Details

5 In Stock as of September 22, 2020 10:56 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):6.00 inches
  • Automann Number:135.S2841
  • Haldex Number:40020212, 400-20212, 409-20006
  • MPN: 40020212-I
SKU 40020213
$115.00

Genuine Haldex self-securing automatic slack adjuster with 1.625 inch Camshaft Diameter, 37 Spline, 5.5 inch Arm Span. OEM #: 409-20024   Details

8 In Stock as of September 22, 2020 10:56 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.62 inches
  • Spline Teeth:37
  • Arm Span (A):5.50 inches
  • Automann Number:135.S3740
  • BWP Number:M-3372
  • Dayton Number:05-565
  • Euclid Number:E-6996, E-6996A, E-6996B
  • Gunite Number:AS1143, AS1021, AS1027, AS1043, AS1045
  • Haldex Number:CS52325, KN52260, KN52261, KN52262, KN52263, KN52264
  • Leland Number:L3008
  • Meritor Number:R801101, R802610, R802611, R803060, R803061, R803114, A20-3275-N-768S, A31-3275-H-1152, A45-3275-A-599S, A45-3275-U-593S, A48-3275-A-1145, A48-3275-Z-1144, A67-3275-H-1152, A79-3275-A-1145, A79-3275-Z-1144
  • Spicer Number: 11-369, 11-523
  • MPN: 40020213
SKU 40020214
$115.00

Genuine Haldex self-securing automatic slack adjuster with 1.625 inch camshaft diameter, 37 Spline, 6 inch arm span. OEM #: 409-20025   Details

7 In Stock as of September 22, 2020 10:56 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.62 inches
  • Spline Teeth:37
  • Arm Span (A):6.00 inches
  • Automann Number:135.S3741
  • Dayton Number:05-764
  • Cross References:AS1044
  • Manufacturers Part Number:409-20025
  • MPN: 409-20025
SKU 40020215
$115.00

Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 5.5 inch Arm Span. OEM #: 409-20000   Details

4 In Stock as of September 22, 2020 10:56 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):5.50 inches
  • Automann Number:135.S1040
  • Haldex Number:409-20000
  • MPN: 40020215
SKU 40020216
$115.00

Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 6 inch Arm Span. OEM #: 409-20004   Details

3 In Stock as of September 22, 2020 10:56 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):6.00 inches
  • Automann Number:135.S1041
  • Haldex Number:40020216, 400-20216, 409-20004
  • MPN: 40020216
SKU 40020223
$115.00

Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 10 Spline, 6 inch Arm Span. OEM #: 409-20005   Details

1 In Stock as of September 22, 2020 10:56 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):6.00 inches
  • Haldex Number:409-20005
  • MPN: 40020223
SKU 40020231
$92.91

Genuine Haldex self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 5.5 inch Arm Span. OEM #: 409-20019   Details

2 In Stock as of September 22, 2020 10:56 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.50 inches
  • Automann Number:135.S2835
  • Haldex Number:40020231, 400-20231, 409-20019
  • MPN: 40020231
Free Ship!
SKU 40020304
$115.95

Haldex Automatic Slack Adjuster. 1.5 inch 28 spline, 5.5 inch arm length, 1/2 inch arm hole diameter. Plate and Flat stud style anchor bracket.   Details

4 In Stock as of September 22, 2020 10:56 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Offset
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.50 inches
  • Manufacturers Part Number:409-20010
  • MPN: 409-20010
Free Ship!
SKU 40050003
$112.95

Haldex Automatic Slack Adjuster. 1.5 inch 28 spline, 6.5 inch arm length, 5/8 inch arm hole diameter. 34° body angle. Strap style anchor bracket.   Details

2 In Stock as of September 22, 2020 10:56 AM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):6.50 inches
  • Manufacturers Part Number:409-50145
  • MPN: 409-50145

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.



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