Manual Slack Adjuster for Semi Trucks (KN44042) – 37 Tooth Heavy Duty Brake Component
Heavy-duty semi slack adjuster KN44042 for trucks & trailers. 37-tooth, 3-hole design (5″×6″×7″). ISO-certified, zinc-plated. OEM quality with global availability. MOQ 50pcs.
Basic Info.
- Model NO. KN44042
- Type: Brake System
- Material: Steel
- Position: Front
- Certification: ISO/TS16949, ISO13485
- Classification: Drum
- Drum Brakes Classification: Brake Drum
- Main Market: South America, North America, Eastern Europe, Mild East, Southeast Asia, Africa, Western Europe, Eastern Asia, Northern Europe, Oceania, Southern Europe, Central America, South Asia, Domestic Market
- Quality: 100% Test
- OEM No.: kN44042
- Bushing: 1/2″
- MOQ: 50 PCS
- Color Available: Color Available
- Package: Neutral Packaging or Brand Box
- Teeth: 37
- Dimensions: a: 5″, B: 6″, C: 7″
- Usage: Manual
- Color: Golden & Black
- Transport Package: Carton Packaging
- Specification: 3 Holes 37 Teeth
- Origin: China
- HS Code: 87083099
- Production Capacity: 50000 pieces/Year
Product Description of semi slack adjuster
Brake Part-Truck & Trailer Manual Slack Adjuster with OEM Standard (KN44042)
Original No.: KN44042
- The manual slack adjuster is used for heavy duty truck and trailer.
- The conventional color is zinc plated.
- We can produce great many kinds of manual slack adjusters according to customer’s requirments.
Photo show
This product is a heavy-duty Manual Slack Adjuster designed specifically for semi-trucks and trailers, carrying the OEM number KN44042. Engineered for reliable brake performance in commercial vehicles, this semi slack adjuster features a robust 37-tooth design with a unique 3-hole configuration measuring 5″×6″×7″. Manufactured from high-quality steel with zinc-plated finishing in golden and black colors, this component ensures precise manual adjustment of brake clearance between the brake shoe and drum. Certified to ISO/TS16949 and ISO13485 international standards, this semi slack adjuster meets the most rigorous quality and safety requirements for heavy-duty vehicle applications.
The technical specifications of this semi slack adjuster include a 1/2″ bushing and standardized dimensions optimized for front-position drum brake systems. Designed specifically for heavy-duty truck and trailer applications, each unit undergoes 100% quality testing to ensure durability and reliable performance under the most demanding operating conditions. The zinc-plated finish provides excellent corrosion resistance while maintaining the professional appearance required for commercial vehicle components.
With a minimum order quantity of 50 pieces, this semi slack adjuster is packaged securely in protective cartons, available in either neutral packaging or custom brand boxes according to customer requirements. Produced in China with an annual production capacity of 50,000 units, the product is available for global shipping to markets throughout North and South America, Europe, Asia, Africa, and Oceania, serving commercial vehicle operators and maintenance providers worldwide.
In addition to the primary OEM number (KN44042), this semi slack adjuster is cross-referenced with numerous alternative part numbers from various manufacturers, ensuring broad compatibility with different truck models and brake systems. The manufacturer maintains comprehensive production capabilities to create various types of manual slack adjusters according to specific customer requirements and application needs, providing reliable brake adjustment solutions for semi-trucks and commercial vehicles across global markets.
Except this semi slack adjuster, we can also provide:
| OE No. | Spline | Clevis Bushing | Application |
| 72875 | 1 1/2-10 | 14×6 | |
| 79005 | 1 1/2-10 | 14×6/7 | |
| 72166 | 1 1/2-10 | 12.7 | |
| 72678 | 1 1/2-10 | 12.7 | |
| 79011 | 27 | 14 | |
| 79207 | 26 | 14 | |
| 72702 | 1 1/2-10 | 14×6 | |
| 79017 | 27 | 14 | |
| 79018 | 27 | 14 | |
| 79299 | 27 | 14 | |
| 79300 | 27 | 14 | |
| 72532 | 1 1/2-10 | 14 | |
| 72533 | 1 1/2-10 | 14 |
CROSS REF.
E-9102 KN55001
283411 E-1574 KN44041
278010 E-1063HD KN47081
278321 E-940 KN47011
278302 E-4904 KN48031
278303 E-939 KN48001
286965 KN44051
287899 E-2459HD KN44061
278305 E-539 KN48002
288282 E-2458 KN44071
KN44042
Why Choose Our Manual Slack Adjuster for Semi Trucks (KN44042)?
With decades of manufacturing excellence, we specialize in producing premium brake components that meet the rigorous demands of heavy-duty transportation. Our Manual Slack Adjuster (KN44042) is engineered to deliver unmatched performance and reliability for semi-trucks and trailers. Here’s why industry professionals worldwide trust our products:
Heavy-Duty Construction: Manufactured from high-strength steel with protective zinc plating, our semi slack adjuster is built to withstand extreme conditions. The robust 37-tooth design and 3-hole configuration (5″×6″×7″) ensure durability and long service life in the most demanding applications.
Precision Engineering: Featuring a precise 37-tooth spline design with 1/2″ bushing, our adjuster guarantees accurate brake adjustment and perfect compatibility with various semi-truck and trailer braking systems, ensuring optimal performance and safety.
Quality Certified Excellence: Every slack adjuster is 100% tested and manufactured under ISO/TS 16949 certification, meeting the highest international standards for automotive quality and reliability. Our commitment to quality ensures consistent performance batch after batch.
Global Compatibility & Availability: Designed as an exact replacement for OEM number KN44042, our adjuster is trusted in markets across North America, South America, Europe, Asia, and beyond. We offer global shipping and reliable supply chain management.
Customization Options: Available in various finishes and packaging options (neutral or custom branded), we can tailor our products to meet your specific requirements and branding needs.
Professional Installation Guide for Semi Slack Adjuster (KN44042)
Safety First Protocol:
Park the vehicle on level ground and securely chock all wheels
Engage parking brakes and completely depressurize air systems
Wear appropriate personal protective equipment throughout installation
Installation Procedure:
Component Inspection: Thoroughly clean the brake camshaft splines using appropriate cleaning solutions. Inspect for wear, damage, or corrosion. Replace any compromised components before proceeding.
Precise Alignment: Carefully align the 37-tooth spline of the semi slack adjuster with the camshaft splines. Ensure perfect meshing without forcing components together to prevent damage.
Secure Mounting: Slide the adjuster onto the camshaft until fully seated. Tighten the clamp bolt to the manufacturer’s specified torque value using a calibrated torque wrench. Proper torque is essential for safety and performance.
Linkage Connection: Connect the brake chamber pushrod to the clevis, ensuring proper alignment and smooth operation. Secure with new cotter pins and check for free movement without binding.
Initial Adjustment: Manually adjust the slack adjuster to take up slack until brake shoes contact the drum. Back off according to manufacturer specifications (typically 1/4 to 1/2 turn) to set proper running clearance.
Comprehensive Testing: Conduct thorough testing including:
Visual inspection of all connections
Air system pressure and leakage tests
Brake application and release tests
Final adjustment verification
Maintenance Best Practices:
Regular inspection every 3 months or 25,000 miles
Proper lubrication of moving components
Periodic adjustment checks
Immediate replacement of worn components
Maintain detailed service records
Professional Recommendation: Always consult the vehicle manufacturer’s service manual for specific instructions and torque specifications. Installation by qualified technicians is strongly recommended.
FAQ of semi slack adjuster
Q: Are you trading company or factory?
A: We are the manufacturer.
Q: What’s the MOQ for each item?
A: Usually the MOQ is 100pcs for each type. If color box is requested, the MOQ is 200pcs.
Q: What about the delivery time?
A: It’s about 1 to 5 days for the goods have in stock, 15 to 30 days for the goods need to be manufactured based on your order.
Q: What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We’ll show you the photos of the products and packages
before you pay the balance.
Q: What is your terms of delivery?
A: EXW, FOB, CFR, CIF, DDU.
Q: What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent,
we can pack the goods in your branded boxes after getting your authorization letters.
Q: Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q: Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.
Final Call to Action (CTA)
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This Manual Slack Adjuster isn’t just a part—it’s a critical safety upgrade for any heavy-duty braking system. Get yours today!
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