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Slack Adjusters

Slack Adjusters

OEM quality manual and automatic slack adjusters for commercial trucks and trailer braking systems.

Found 102 Matching Products
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  1. Slack Adjuster
  2. Clevis Pins
  1. Clevis
  2. Slack Adjuster Service Kit
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  1. Manual
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  1. 6.50 inches
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SKU R801042-I
$67.14

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

20+ In Stock
  • 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 42710558
$13.45

ABA stud kit for Haldex type automatic slack adjusters. Services 4 slack adjusters.   Details

Typically ships in 5 to 7 business days.
  • Automann Number:135.H0558
  • Euclid Number:E427K, E-427K
  • Haldex Number:42710558,427-10558
  • Meritor Number:R810327
  • MPN: 42710558
SKU CPS114
$5.95

Greasable clevis pin CPS114, 1/4 inch diameter x 1-1/4 inches long with cotter key.   Details

20+ In Stock
  • Diameter:1/4 inch
  • Length:1-1/4 inch
  • MPN: CPS114
SKU CB22153
$67.14

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

20+ In Stock
  • 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
SKU CP138
$5.95

Greasable clevis pin CP138, 1/2 inch diameter x 1-3/8 inches long with cotter key.   Details

Typically ships in 7 to 10 business days.
  • Diameter:1/2 inch
  • Length:1-3/8 inch
  • MPN: CP138
SKU R801041-I
$67.14

Meritor Type ABA Automatic Slack Adjuster R801041. 1.5 inch-10, 5.5 inch arm length, Unhanded.   Details

20+ In Stock
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:10
  • Arm Span (A):5.50 inches
  • Automann Number:139.1031
  • BWP Number:M-4043
  • Dayton Number:05-361
  • Euclid Number:E-11398
  • Meritor Number:A163275H1152S, R801041, R803195
  • MPN: R801041
SKU R801073I
$67.14

Rockwell type Automatic Slack Adjuster for drive or steer axle. 1.5 inch 28 spline, 5.   Details

20+ In Stock
  • Slack Adjustor Type:Automatic
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.50 inches
  • Automann Number:139.2831
  • BWP Number:M-4046
  • Dayton Number:05-363
  • Euclid Number:E-11401
  • Ford Number:4C4Z2041DA
  • International Number:2018227C91
  • Meritor Number:A23275A599S, A23275N768S, A23275U593S, A23275W595S, A233275H1152S, A243275H1152, A273275H1152S, A283275H1152S, A293275A599S, A293275U593S, A323275H1152, A323275N768, A353275A1145, A353275H1152S, A353275A1145S, A363275Z1144S, A373275N768, A393275A1145, A393275A1145S, A393275Z1144, A393275Z1144S, A413275A1145, A413275Z1144, A433275A1145S, A433275Z1144S, A443275A599S, A443275U593S, A443275Z1144, A443275Z1145, A463275Z1144S, A463275A1145S, A473275A1145, A473275Z1144, A563275A599S, A563275U593S, A573275A1145, A573275Z1144, R801073, R801072, R801079, R802440, R802441, R802444, R802445, R802446, R802447, R802462, R802463, R803044, R803045, R803046, R803047, R803048, R803049, R803050, R803051, R803052, R803053, R803108, R803110
  • Volvo Number:3947646, 8086517
  • MPN: R801073I
SKU R801700-I
$12.95

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

20+ In Stock
  • Automann Number:139.1700
  • Euclid Number:E11432
  • Meritor Number:R801700
  • MPN: R801700-I
SKU 40010143-I
$67.94

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

20+ In Stock
  • 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
SKU CB24100
$72.22

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

2 In Stock
  • 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: CB24100
SKU GS6000022825
$22.67

A SORL manual slack adjuster, 1.5 inch camshaft diameter, 28 spline and 5.5 and 6.5 inch arm span.   Details

20+ In Stock
  • Slack Adjustor Type:Manual
  • Slack Adjustor Arm:Straight
  • Camshaft Diameter:1.50 inches
  • Spline Teeth:28
  • Arm Span (A):5.50 inches
  • Arm Span (B):6.50 inches
  • Automann Number:134.2831
  • Bendix Number:288753
  • BWP Number:M2577
  • Dayton Number:05-237
  • Euclid Number:E2459, E2459HD
  • Meritor Number: R822004, R823003, R824004
  • Midland Number:KN44061
  • Spicer Number: 10-368, 10-368BULK, 10-368HD
  • Manufacturers Part Number:6000022825
  • MPN: 6000022825
SKU 40020212-I
$71.70

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

20+ In Stock
  • 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

Brake Adjusters

Slack adjusters (also called brake adjusters or just "slacks") regulate the distance that the air brake has to travel to apply friction to the wheel. This distance increases as use of the brake causes the friction material of the brake shoe to wear away. When the brake is used, the operating rod pushes out on the slack adjuster which then turns the S-cam. The S-cam pushes the brake shoes apart which applies friction and slows the vehicle. Without this function, the air brake can become out of adjustment and the vehicle may lose its capability to slow or stop consistently.

When you need to replace your slack adjusters, it is very important to find the correct part that matches your equipment to ensure a safely operating braking system. It's easy to find the correct replacement slack adjusters for your truck, tractor or trailer. First, the type of slack adjuster should be considered. Slack adjusters are available in two types: manual slack adjusters and automatic slack adjusters.

Manual slack adjusters compensate for the distance in the brake linkage by adjustments made with a wrench.

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

Both manual and automatic slack adjusters have three qualifications which can be easily measured. Finding these three measurements is the key to finding the correct slack adjusters.

How to Measure and Identify a Slack Adjuster

Spline Teeth

The spline teeth of a slack adjuster fit into the spline teeth of the camshaft. Therefore, the slack adjuster and camshaft must have the same amount of teeth. An easy way to determine the number of teeth is to simply count them.

Spline teeth of a slack adjuster.

Camshaft Diameter

The camshaft diameter is size of the camshaft that fits your particular slack adjuster. This can be found by measuring the inside of the socket or the width of the camshaft.

Camshaft diameter of a slack adjuster

Arm Span

The arm span of a slack adjuster is the distance between the center of the camshaft and the center of the pin hole that is used with the clevis. Many slack adjusters feature multiple pin holes. These slacks can be used at any of the lengths available. For example, a slack adjuster with an arm span of 5.0 and 6.0 inch can be used in applications where a 5 inch or 6 inch arm span is needed.

This picture illustrates the arm span of a slack adjuster.

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