Slack Adjusters
OEM quality manual and automatic slack adjusters for commercial trucks and trailer braking systems.
Found 114 Matching Products
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SKU CP134
$5.95
Greasable clevis pin CP134, 1/2 inch diameter x 1-3/4 inches long with cotter key. Details
16 In Stock
- Diameter:0.500 inch
- Length:1-3/4 inch
- MPN: CP134
SKU 40010305-I
$67.94
Haldex Type Automatic Slack Adjuster for 12-1/4 inch brake assembly applications. 1. 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:135.2842, 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 R801041-I
$67.14
Meritor Type ABA Automatic Slack Adjuster R801041. 1.5 inch-10, 5.5 inch arm length, Unhanded. Details
17 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 S2006
$18.95
Gunite Type clevis kit, 5/8 inch - 18 threads. Includes 1/2 and 1/4 inch pins. Details
9 In Stock
- Automann Number:179.YK5010
- Euclid Number:E-15069, E15072
- Gunite Number:AS3016, AS3017, AS3019
- Haldex Number:CQ36544
- MPN: S2006
SKU 40010155
$140.42
Haldex Automatic Slack Adjuster. 1.5 inch 10 spline, 5. Details
Typically ships in 5 to 7 business days.
- Slack Adjustor Type:Automatic
- Slack Adjustor Arm:Straight
- Camshaft Diameter:1.50 inches
- Spline Teeth:10
- Arm Span (A):5.50 inches
- Automann Number:135.1034
- Eaton Number:809610
- Haldex Number:40910085, 40910101, 40910223, 40910294, 40910370, 40910417, 40910635
- Meritor Number:R806002
- Midland Number:40010155
- Spicer Number: 315307
- Manufacturers Part Number:409-10635
- MPN: 409-10635
SKU 40020212-I
$56.93
Haldex type self-securing automatic slack adjuster with 1.5 inch Camshaft Diameter, 28 Spline, 6. Details
4 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
- Batco Number:05-464
- Euclid Number:E11922
- Haldex Number:40920006, 40020212
- International Number:ZZ40020212
- Mack Number:539640020212
- Meritor Number:M808013
- Volvo Number:MID40020212
- MPN: 40020212-I
SKU 135.1016
$86.56
Haldex type automatic slack adjuster 135.1016 for non-standard steer axles. 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
- Haldex Number:409-10172, 40910172, 400-10013, 40010013
- UPC: 889626483011
- MPN: 135.1016
Free Ship!
SKU CB22152
$82.50
Crewson type automatic slack adjuster for 12−1/4 inch brake Low Boy
application. 1. Details
Typically ships in 7 to 10 business days.
- Slack Adjustor Type:Automatic
- Slack Adjustor Arm:Offset
- Camshaft Diameter:1.50 inches
- Spline Teeth:28
- Arm Span (A):5.50 inches
- Arm Span (B):6.50 inches
- Note:Product may vary from image shown
- MPN: CB22152
SKU R801074-I
$67.14
Meritor Type Automatic Slack Adjuster for use on drum brakes with a type 30 brake chamber. 1. 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:139.2830
- Meritor Number:A143275J1154S, R801074, R803112
- MPN: R801074-I
SKU 05-250
$41.65
Curved arm manual slack adjuster. 1.5 inch camshaft diameter 10 spline, 6 inch curved arm span. Details
4 In Stock
- Slack Adjustor Type:Manual
- Slack Adjustor Arm:Offset
- Camshaft Diameter:1.50 inches
- Spline Teeth:10
- Arm Span (A):6.00 inches
- Automann Number:134.1042
- Bendix Number:278084, 291223
- BWP Number:M-475
- Crewson Number:CA1296
- Dayton Number:05-250
- Eaton Number:R2138
- Euclid Number:E-2091
- Haldex Number:1010706, N2943
- Leland Number:L1275
- Midland Number:KN51000
- Spicer Number: M12WR101, 10-353
- MPN: 05-250
SKU 134.2831
$29.24
Straight arm manual slack adjuster 134.2831 with 1.50 inch camshaft diameter 28 spline, 5.5 and 6. Details
Typically ships in 7 to 10 business days.
- 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, 288753N
- Dayton Number:05-263
- Euclid Number:E2459, E2459BK, E2459HD, E2459HDBK, E2459S
- Haldex Number:KN44061
- Leland Number:L1648
- Meritor Number:A163275X596, A23275X596, R822004, R823003, R824004
- Sloan Number:2012, 2012A
- Spicer Number: 10-368, 10-368BULK, 10-368HD
- Trailmobile Number:17A23101
- Velvac Number:035123
- UPC: 889626013928
- MPN: 134.2831
SKU 40020211I
$67.94
Haldex type Automatic Slack Adjuster. 1.5 inch 28 spline, 5. Details
8 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:135.S2840
- Haldex Number:40020211
- Manufacturers Part Number:409-20002
- Note:Product may vary from image shown.
- MPN: 409-20002
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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.
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.
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.
