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.

Found 78 Matching Products
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  1. Slack Adjuster
  1. Clevis
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  1. 37
  1. 1.25 inches
  1. 1.50 inches
  1. 1.62 inches
  1. 1/4 inch
  1. 5.00 inches
  1. 5.50 inches
  1. 6.00 inches
  1. 6.50 inches
  1. 1.19 inch
  1. 6.00 inches
  1. 6.50 inches
  1. Haldex
  1. Multiple Heavy Duty Manufacturers
  1. Sirco
  1. Stemco
  1. Automann
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SKU AS3000-I
$7.95
Automatic Slack Adjuster Clevis Kit | Gunite Type

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

20+ In Stock as of January 24, 2021 11:57 AM EST.
  • Slack Adjustor Type:Automatic
  • Automann Number:179.YK5814
  • Dayton Number:05-590
  • Euclid Number:E-15061
  • Gunite Number:AS3000
  • MPN: AS3000-I
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SKU CB22103
$59.95
Slack Adjuster | Automatic | 1.5 Inch - 28 Spline | 5 - 6 Inch Span

Crewson type automatic slack adjuster with 1.   Details

13 In Stock as of January 24, 2021 12:41 PM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.00 inches
  • Arm Span (B):6.00 inches
  • Automann Number:136.2830
  • Bendix Number:65176
  • BWP Number:M-3368
  • Crewson Number:CB22103, MK22103S, CB22106, CI22103, CI22106, CS56004
  • Dayton Number:05-562
  • Euclid Number:E-6993A, E-6993, E-6993B
  • Haldex Number:CS52321
  • International Number:1681286C91
  • Leland Number:L3005
  • Mack Number:25QD354
  • Meritor Number:R803055
  • Spicer Number: 11-355, 11-511, 11-515, 11-519
  • Note:Product may vary from image shown
  • MPN: CB22103
SKU SA24100
$64.42
Slack Adjuster | Automatic | 1.25 Inch - 10 Spline | 5.5 Inch Span

A Crewson Brunner type automatic slack adjuster with 1.25 inch Camshaft Diameter, 10 Spline, 5.   Details

2 In Stock as of January 24, 2021 12:41 PM EST.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.25 inches
  • Spline Teeth:10
  • Arm Span (A):5.50 inches
  • Automann Number:136.1010
  • BWP Number:M-3363
  • Crewson Number:MK24100S, CB24100, CI24100, CB24102
  • Dayton Number:05-570
  • Euclid Number:E-6987A, E-6987, E-6987B
  • Haldex Number:CS52331
  • Leland Number:L-3009, L3059, L3065
  • Spicer Number: 11-399, 11-399-100, 11-500, 11-501, 11-502
  • MPN: SA24100
SKU 19X127
$0.99
Slack Adjuster Clevis Pin | 1/4 Inch

Slack Adjuster Clevis Pin R810019, 1/4 inch diameter x 1.19 inches long with cotter key.   Details

20+ In Stock as of January 24, 2021 12:41 PM EST.
  • Diameter:1/4 inch
  • Length:1.19 inch
  • Automann Number:179.CP14
  • Dayton Number:05-583
  • Meritor Number:19X127, R801730, 19X70
  • MPN: 19X127
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SKU R801042-I
$52.95
Slack Adjuster | Meritor Type Automatic | 1.5 Inch - 10 Spline | 6.0 Inch Span

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

20+ In Stock as of January 24, 2021 12:41 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 SA21103
$64.42
Slack Adjuster | Automatic | 1.5 Inch - 10 Spline | 5 - 6 Inch Span

A Crewson Brunner type automatic slack adjuster with 1.   Details

10 In Stock as of January 24, 2021 12:41 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
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SKU R802463-I
$59.95
Slack Adjuster | Meritor Type Automatic | 1.5 Inch - 28 Spline | 5.5 Inch Span

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

17 In Stock as of January 24, 2021 12:41 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
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SKU 40010141
$112.95
Slack Adjuster | Automatic | 1.5 Inch - 28 Spline | 5.5 Inch Span

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

Availability: 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):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
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SKU 40020212-I
$69.95
Slack Adjuster | Haldex Type Automatic | 1.5 Inch - 28 Spline | 6 Inch Span

Haldex type self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 6.   Details

7 In Stock as of January 24, 2021 12:41 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:135.S2841
  • Haldex Number:40020212, 400-20212, 409-20006
  • MPN: 40020212-I
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SKU R801074-I
$59.95
Slack Adjuster | Meritor Type Automatic | 1.5 Inch - 28 Spline | 6 Inch Span

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

Availability: Typically ships in 2 to 3 business days.
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):6.00 inches
  • Automann Number:139.2830
  • Meritor Number:A143275J1154S, R801074, R803112
  • MPN: R801074-I
SKU R801700-I
$12.95
Slack Adjuster | Automatic Pawl Kit | Meritor, Rockwell

Automatic slack adjuster guide pawl kit for All Meritor ASAs.   Details

20+ In Stock as of January 24, 2021 12:41 PM EST.
  • Slack Adjustor Type:Automatic
  • Automann Number:139.1700
  • Euclid Number:E11432
  • Meritor Number:R801700
  • Cross References:480 MTRR801700, 705 A12297M6461, 785 R801700, COK R801700, FRL 42005531 FRL 42013622
  • MPN: R801700-I
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SKU 40010305-I
$52.95
ABA Slack Adjuster | Automatic | 1.5 Inch - 28 Spline | 6 Inch Span

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

4 In Stock as of January 24, 2021 11:52 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

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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