Automatic Slack Adjusters for Air Brakes
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Automatic Slack Adjusters

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

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Free Ship!
SKU R801042-I
$52.95

Meritor Type ABA Automatic Slack Adjuster R801041. 1.5 inch-10, 6.0 inch arm length, Unhanded.   Details

9 In Stock as of April 16, 2021 7:56 PM 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:139.1030
  • BWP Number:M-4044
  • Dayton Number:05-360
  • Euclid Number:E-11399
  • Meritor Number:A43275J1154S, R801042, R803106
  • MPN: R801042
SKU AS3000-I
$7.95

Automatic Slack Adjuster Clevis Kit AS3000 for Gunite ABA Type 5/8 inch-18 thread.   Details

20+ In Stock as of April 16, 2021 19:06 PM EST.
  • Slack Adjustor Type:Automatic
  • Automann Number:179.YK5814
  • Dayton Number:05-590
  • Euclid Number:E-15061
  • Gunite Number:AS3000
  • MPN: AS3000-I
Free Ship!
SKU CB22153
$59.95

A Crewson Brunner type automatic slack adjuster for 12-1/4 inch brake with 1.   Details

20+ In Stock as of April 16, 2021 19:55 PM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Offset
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.00 inches
  • Arm Span (B):6.00 inches
  • Automann Number:136.2843
  • BWP Number:M-3492
  • Crewson Number:CB22153, CB22123, CI22123, CI22153
  • Dayton Number:05-552
  • Euclid Number:E-10949A, E-10949, E-10949B
  • Haldex Number:CS52341
  • Leland Number:L-3161, L3161
  • MPN: CB22153-I
Free Ship!
SKU 40010143-I
$52.95

Haldex Type Automatic Slack Adjuster. 1.5 inch 10 spline, 5.5 and 6.   Details

20+ In Stock as of April 16, 2021 19:02 PM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):5.50 inches
  • Arm Span (B):6.50 inches
  • Automann Number:135.1031, 133.1031, 135.1045
  • BWP Number:M-4058
  • Dayton Number:05-661
  • Euclid Number:E-6924B
  • Haldex Number:40010121, 40010143, 400-10143, 409-10733, 40910733, 409-10813, 40910813
  • Leland Number:L3607
  • Meritor Number:R806022
  • Spicer Number: 818552
  • MPN: 40010143
Free Ship!
SKU CB24103
$69.95

Crewson automatic slack adjuster with 1.   Details

Typically ships in 1 business day.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.25 inches
  • Spline Teeth:10
  • Arm Span (A):5.00 inches
  • Arm Span (B):6.00 inches
  • Automann Number:136.1011
  • Crewson Number:CB24103, CI24103
  • Haldex Number:CS52332
  • Note:Product may vary from image shown
  • MPN: CB24103
Free Ship!
SKU R802463-I
$59.95

Meritor Type Automatic Slack Adjuster for use on disc brakes with a type 30 brake chamber. 1.   Details

13 In Stock as of April 16, 2021 7:56 PM 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:139.2835
  • Meritor Number:A443275Z1144, A44-3275-Z-1144, R802463, R803050
  • Cross References:E11420, 05563, TDAR802463, NAADB, CS56040, 1694309C91, ATIR802463, A293275U593, A433275Z1144S, A573275U593S, A703275Z1144S, R802460, 764015073, TDAR802463, R802463
  • MPN: R802463-I
SKU R803051I
$59.95

Meritor type automatic slack adjuster for use on type 30 disc brakes. 1.5 inch 28 spline, 5.   Details

1 In Stock as of April 16, 2021 7:56 PM 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:139.2834
  • Meritor Number:A443275A1145, R802462, R803051
  • Cross References:E11419, 05563, TDAR802462, NAADB, CS56040, 1694310C91, ATIR802462, A293275A599, A293275A599S, A433275A1145S, A573275A599S, A703275A1145S, R802461, 764015074
  • UPC: 889626015212
  • MPN: R803051I
Free Ship!
SKU 40010141
$112.95

Haldex Automatic Slack Adjuster. 1.5 inch 28 spline, 5.   Details

4 In Stock as of April 16, 2021 7:56 PM 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:133.2831
  • BWP Number:M-4060
  • Dayton Number:05-663
  • Euclid Number:E-6927B
  • Haldex Number:40010141, 400-10141, 409-10814, 40910814, 409-10408, 40910408, 409-10650, 40910650
  • Leland Number:L3605
  • Mack Number:25QD410P10
  • Meritor Number: R806004, R806026
  • Midland Number: R806026
  • Manufacturers Part Number:409-10814
  • MPN: 409-10814
Free Ship!
SKU 40050003
$112.95

Haldex Automatic Slack Adjuster. 1.5 inch 28 spline, 6.   Details

Typically ships in 5 to 7 business days.
  • 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
Free Ship!
SKU CB22123
$59.95

Crewson type automatic slack adjuster with 1.   Details

4 In Stock as of April 16, 2021 7:55 PM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Offset
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.00 inches
  • Arm Span (B):6.00 inches
  • Automann Number:136.2843
  • Crewson Number:CB22153
  • Dayton Number:05-552
  • Note:Product may vary from image shown
  • MPN: CB22123
SKU SA21103
$64.42

A Crewson Brunner type automatic slack adjuster with 1.   Details

8 In Stock as of April 16, 2021 7:55 PM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):5.00 inches
  • Arm Span (B):6.00 inches
  • Automann Number:136.1030
  • BWP Number:M-3367
  • Crewson Number:CB21103, CI21103, MK21103S
  • Dayton Number:05-560
  • Euclid Number:E-6991A
  • Haldex Number:CS52315
  • Leland Number:L3003
  • Spicer Number: 11-351, 11-351-101, 11-513, 11-516, 11-521
  • MPN: SA21103
Free Ship!
SKU 40010305
$112.95

Haldex Automatic Slack Adjuster for 12-1/4 inch brake assembly applications. 1.   Details

3 In Stock as of April 16, 2021 7:56 PM 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:133.2842
  • BWP Number:M-4062
  • Dayton Number:05-651
  • Euclid Number:E-6933
  • Haldex Number:40010305, 400-10305, 40910655, 409-10655
  • Leland Number:L3614
  • Meritor Number:R806006
  • Manufacturers Part Number:409-10655
  • MPN: 409-10655

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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