You are here: Home » Products » FAW » Truck Chassis Parts » Bulk Supply Brake Slack Adjuster Faw Dump Truck Auto Parts Wg4005456211 Automatic Slack Adjuster Automatic Adjustment Arm

Bulk Supply Brake Slack Adjuster Faw Dump Truck Auto Parts Wg4005456211 Automatic Slack Adjuster Automatic Adjustment Arm

The WG4005456211 Automatic Brake Slack Adjuster is a core safety device in the pneumatic foundation brake system of SINOTRUK HOWO, T7H, TX, TH7, and SITRAK C7H/G7 series heavy-duty commercial vehicles. It automatically compensates for wear-induced clearance between the brake shoe lining and brake drum, ensuring that the brake chamber stroke remains within safe limits throughout the service life of the friction material.

Unlike manual slack adjusters, this self-adjusting unit uses an internal one-way clutch mechanism and worm gear system to incrementally tighten the pushrod linkage each time the brakes are applied — preventing excessive pedal travel, reducing driver fatigue, and eliminating dangerous "brake fade" due to over-extension.
Availability:
Quantity:
facebook sharing button
twitter sharing button
line sharing button
wechat sharing button
linkedin sharing button
pinterest sharing button
whatsapp sharing button
kakao sharing button
snapchat sharing button
telegram sharing button
sharethis sharing button
  • WG4005456211

  • FAW

Attribute Description
Part Number WG4005456211
Alternative Names Auto Slack Adjuster, Automatic Brake Adjuster, Self-Adjusting Brake Arm
Function Automatically maintains optimal brake clearance during operation
Position Mounted on S-cam shafts at front/rear axle brake chambers
Application Type Air Brake Systems – Heavy-Duty Trucks, Dumpers, Tractors
Design Standard Complies with QC/T 943-2013 and GB 12676
Housing Material Ductile Cast Iron or Forged Steel (high impact resistance)
Internal Mechanism Alloy steel worm gear + one-way clutch (heat-treated)
Lubrication System Equipped with grease nipple (Zerk fitting) for maintenance
Sealing Rubber dust boot protects internal components from contamination
自动间隙调节器-3


自动间隙调节器-1


Parameter Specification
Spline Size 1.5 inch – 10 tooth / 28 tooth (verify per axle model)
Center Distance (Arm Length) 145 mm or 165 mm (critical for torque transfer)
Adjustment Range Up to 35 mm (automatically adjusts over brake pad life)
Activation Threshold Automatically engages after ~0.5–1.0 mm wear per cycle
Operating Pressure Compatible with standard air brake systems (up to 10 bar / 145 psi)
Temperature Range -40°C to +90°C
Weight (Approx.) 2.1 kg – 2.6 kg
Certification Meets QC/T 943-2013 Automotive Brake Adjuster Technical Requirements


Previous: 
Next: 
INQUIRE

RELATED PRODUCTS

ABOUT US

We uphold the principles of "honoring contracts, ensuring quality, cooperating with integrity, and pursuing mutual benefit." Looking forward to working with you to become your most trusted long-term partner.

QUICK LINKS

PRODUCT CATEGORY

CONTACT US

Leave a Message
Copyright © 2025 Shaanxi Weidong Hongjie Trading Co., Ltd. All Rights Reserved. SiteMapPrivacy Policy | Technical Support : Maizeng