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OEM American and European Type Slack Adjusters for Semi Trailers and Trucks

20+ years of experiences (since 1999)
Implementing IATF 16949-2016
Implementing ISO 9001-2015
Quality testing by an independent laboratory
Warranty: 12 months since shipping date
Sales volume (units) : 35,000,000+
Availability:

Application

Application of slack adjuster

Slack adjusters are mechanical links between the brake-chamber push rod and the camshaft on cam type brakes. It is an important component used to transfer braking force and compensate the design clearance between a brake lining and a brake drum.


The Slack adjuster is widely applied on axles of semi-trailers, full trailers, farm trailers, boat trailers and all trucks.

Features

QC management systemImplementing IATF16949-2016
Services quality management systemImplementing ISO9001-2015
Raw material45# casting Steel or TQ 450-3
PaintingAutomatic coating line ensures maximum protection against corrosion
Sales volume (units)35,000,000+
Warranty12 months since shipping date

Comprehensive Info of Slack Adjusters:

Land area (square meters )45,000+
Sets of annual sales35,000,000+
Number of equipments (sets)50+
Number of employees80+
Number of engineers6+
Clients (overseas)100+
Overseas market30+ countries
Available certificatesCOC; PVOC; CIQ; SONCAP; BV; C/O; FORM E
Slack adjuster typesMamual slack adjsuters and automatic slack adjsuters;
Interchangeable brandsBPW, FUWA, MERCEDES BENZ, Volvo, SCANIA, RENAULT, DAF, MAN, HOWO, IVECO, SINO, KAESSB, KESSLER, SISU, NEOPLAN, DAEWOO, TATRA MAZ LIAZ KAROSA IKARUS, SAF, DHS, ROR, FRUEHAUF, GUNITE, WEBB, KIC, HINO, NISSAN, MITSUBISHI, FOSO, ISUZU, YORK, TRAILER, TRAILOR, WEBCO, ETC.
ReplacementsKN53020; KN44041; KN44061; KN50051; KN47001; KN5100; KN44071; KN44042; 282560; KN44042; KN50070; 279309; 283411; 278321; 278312; 44341-90177; 44342-90216; 47490-1550; 47029-90072; 44341-90166; 44341-9006; 44341-9011; 47490-1090; 18-048; 0517452340; 0517452610; 0517465130; 0517452800; 0517454700; 0517465220; 0517452300; 100101743; 3464201838; 3454201838; 345420173; 0004200438; 3454207238; 3844207538; 4330561030; 1505324; 0351949; 0351949; 150324; 1505325; 0351950; 1505325; F836600; 264142110117; 257342110177; 1448115; 1448120; 1448121; 276517;276518; 1448114; 1448113
Optional partsTubular Rivet, Bearing Housing, Thrust Bearing, Cone Clutch Housing, One Way Clutch Spring, Pinion, Thrust Bush, O Ring, Worm Shaft, Grease Nipple, Body, Bush, Spring Seat, Coil Spring, Spring Retainer, Return Spring -inner, Return Spring -outer, Rack, O Ring, Worm Gear, Gasket, Cover Plate, Control Disk, Control Arm, Cover Plate Assembly, Countersunk Screw, Welch Plug.
PackagePallet.
Standards implementedIATF 16949, ISO9001-2015
PaymentTT, LC, DP
Lead timeAbout 10~15 working days
MOQ1 unit


Parameters

S/NOEM No.SplineTeethArm Length
S/NOEM No.SplineTeethArm Length
1KN440411.625376"
393464201738
26145
2KN550011.25245.5"
403464201738
26145
3KN510001.5106"
413464201838
26145
4KN470811.5105", 6"
420004200438
26145
5KN480311.25104.5", 5.5"
430004200336
26145
6KN470021.5104.5", 5.5"
4470868
26145
7KN480011.25105", 6"
4570868
26145
8KN440511.5285", 6"
4615053421.510165
9KN470111.5105.5", 6.5"
4715053251.510165
10KN440611.5285.5", 6.5"
4815013111.510145, 165
11KN480021.25105", 6", 7"
4915013071.510145, 165
12KN440711.5285", 6", 7"
504335367300
26145
13KN440421.625375", 6", 7"
514335367310
26145
14KN470011.5105", 6", 7"
5221011311801.5105", 6", 7", 8"
15KN47001CD1.5105", 6", 7"
535174526101.510120, 150, 180, 220, 250,
16KN44071CD1.5285", 6" 7"
5421750074001.510127, 152, 178, 203, 230
17KN44042CD1.625375",  6", 7"
55315611.510105, 130, 150, 180, 206
18KN440411.625376"
5605174662201.510120, 135, 150, 165, 180, 250
191 Hole1.510144.5
5705174662201.510120, 135, 150, 165, 180, 250
20KN470111.5105.5", 6.5"
5805174651301.510120, 135, 150, 165, 180, 196, 250
21KN470011.5105", 6", 7"
5905174651301.510120, 135, 150, 165, 180, 250
22KN500601.5104", 5", 6"
60WG9100340056
19145
23KN500701.5104", 5", 6"
61WG9100440005
19120
244 Holes ITALY1.5105", 6", 7", 8"
62DAMER EQ153
14135
254 Holes 10 Teeth1.5105", 6", 7", 8"
63DAMER EQ153
14135
264 Holes 10 Teeth1.5105", 6", 7", 8"
64EQ153
14135
27257341101781.2524140
65EQ153
14135
28257341101771.2524140
66EQ153
14120
29TATA 2 Holes1.524145, 165
67EQ140-21.510125
302641421101601.524140
68DAMER EQ153
14120
31500-35011361.510125
69FAW1.510135
325320-35021351.510135
70FAW1.510135
335320-35022371.510135
712787341.510135
345511-36022371.510165
722787361.510162
355511-35022361.510135
732787351.510162
36BENZ 1 Hole
26145
742765171.510166
37BENZ 1 Hole
26145
752765181.510166
383464201838
26145






Production

In order to ensure sufficient braking force, most of heavy duty trucks and trailers use pneumatic braking system. Because pneumatic braking system can provide more powerful braking force than hydraulic braking. But the same as hydraulic braking, pneumatic braking must also ensure that there is a proper gap between the brake lining and the brake drum in order to exert normal braking force.


In a pneumatic braking system, the gap between the brake drum and the brake lining is not unchanging. Because the brake lining is a consumable, it will gradually become thinner as it continues to wear and consume, causing the gap between the brake drum and the brake lining to become larger and larger. As the gap increases, the braking force of the truck will be weakened. Therefore, it is necessary to ensure that the gap between the brake lining and the brake drum is within an appropriate range. If the clearance is too small, it will cause braking drag. If the clearance is too large, the braking force is not enough.


The device responsible for adjusting the gap is the Slack adjuster. There are two main types, the most common is the manual Slack adjuster, but now many trucks have begun to use the automatic Slack adjuster.


using of slack adjuster


Manual Slack adjusters:

The manual Slack adjuster is the adjustment arm that manually adjusts the brake gap. It is currently the most commonly used Slack adjuster. It has the advantages of low price and simple maintenance, but it also has some disadvantages. Because the brake gap is controlled by the hand-adjusted arm, and the operation is entirely based on human experience, relatively large errors are prone to occur, which seriously affects driving safety. It also requires the operator to lay under the car to adjust, which is very troublesome.

American slack adjusterEuropean slack adjuster


Automatic slack adjusters:

With the increasing technical content of trucks and the gradual popularity of electronic auxiliary products for braking systems such as ABS, manual slack adjuster have gradually failed to keep up with the increasingly high performance requirements. The automatic slack adjuster is increasingly appearing in front of us.

American automatic slack adjuster (1)American automatic slack adjuster (2)

European automatic slack adjuster

Advantages of automatic slack ajuster:


First, the braking force is stable:

The automatic slack adjuster will not be like the manual adjustment arm. The braking force will be lower and lower after the adjustment . The braking force of the automatic adjustment arm is very stable, because it can control the braking gap within the optimal range at any time, which is safer than the manual slack adjuster.

Second, easy to maintain:

The automatic adjustment arm does not require you to frequently lay down under the narrow car to adjust the brake linings.

Third, suitable for ABS:

The automatic slack adjuster is more suitable for use on trucks and trailers equipped with the ABS system than the manual slack adjuster, and can maximize the advantages of the ABS system.

American automatic slack adjuster (4)American automatic slack adjuster (3)


workshops of slack adjuster



Test equipment

Components

Repair kits of slack adjusters


Besides semi trailer Slack adjusters, WONDEE also Supply different types of semi trailer components as below:

 
                                   

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