Korea Truck Brake Parts Haldex Type 1 Hole 25 Teeth 80191 Automatic Slack Adjuster for Hyundal Truck Parts Air Brake Slack Adjuster Manual Slack Adjuster Axle S

• Customization: Available
• After-sales Service: 3year
• Warranty: 3year
• Model NO.: FUWA/BPW/37/10/28teeth/3/4/5/6holes
• Type: Brake System
• Material: Steel
• Certification: ISO/TS16949, ISO13485, ISO14001, BSCI, IATF-16949, ISO9001, ISO9002, AMECA, DOT, ECE, FSC, HACCP, GSV, GMP
• 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
• Color: Black Gold Green Blue Other Colors Specified by Cu
• Model: Truck/Semi Trailer
• Weight: Custom Sizes
• Teeth: 37/10/28
• Transport Package: Carton&Pallet
• Specification: Custom sizes
• Trademark: SD
• Origin: China
• HS Code: 8716900000
• Production Capacity: 110000026PCS Per Year

Product Description

 

Product Description

Place of Origin

Shandong, China

Type

slack adjuster

Material

Steel

Purpose

for replace/repair

Condition

New

Model Number

3/4/5/6/7 HOLE/ 10/28/37TEETEH

Brand Name

SHENGDA

Product Name

brake slack adjuster

Material

steel

Application

Truck and trailer

Color

Customer Demands

Type

Welding

Surface treatment

Rust Prevention

Certificate

ISO 9001

Package

Standard Package

MOQ

1 PC

Logo

customized

Detailed Photos

 

 

Parameter Item	Technical Standard	Test Data	Remarks
Rated Operating Torque	≥50Nm	50-80Nm (varies by model)	Withstand instantaneous impact force during braking
Adjustment Torque Requirement (Automatic Type)	Clockwise rotation ≤13Nm; Counterclockwise rotation ≥18Nm	Clockwise: 8-12Nm; Counterclockwise: 18-22Nm	Replace the slack adjuster if exceeding the range
Brake Clearance Adjustment Range	0.3-0.8mm	Manual Type: 0.3-0.8mm; Automatic Type: Auto-compensate to 0.4-0.6mm	Ensure braking response sensitivity
Fatigue Life	≥100,000 braking cycles (torque attenuation rate <8%)	Attenuation rate ≤5% after 120,000 cycles	Comply with GB 7258-2024 standard
Operating Temperature Range	-40ºC~+200ºC	-45ºC~+220ºC	Adapt to different regional climate conditions
Corrosion Resistance Grade	Salt spray test ≥48 hours	No obvious rust after 72-hour salt spray test	Adopt electrophoresis + plastic spraying double protection process
Dynamic Balance Grade	ISO 21940 G2.5 and above	G2.0	Reduce vibration and noise during high-speed driving

IV. Installation and Adaptation Parameters

• Installation Torque: Fixing nut tightening torque 180-200Nm (standard model), 220-250Nm (heavy-duty model); Bracket bolt/nut tightening torque 50-60Nm.
• Adaptable Air Chamber Push Rod: Stroke 0mm (retract to initial position before installation), push rod diameter φ12-φ16mm.
• Adaptable Voltage (with electronic monitoring model): 24V DC (comply with semi-trailer general electrical standards).
• Installation Requirement: The same axle must use slack adjusters of the same factory, same model and same type to avoid unbalanced braking force.

V. Compliance and Certification Parameters

• Executive Standards: GB/T 31970 (General Requirements for Braking Systems), QC/T 1033 (Special Requirements for Automatic Slack Adjusters), SAE J2902 (Fatigue Life Verification).
• Product Certification: ISO 9001 quality system certification, some export models pass EU ECE R13 standard certification.
• Warranty Period: 12 months (free replacement for parts quality issues under normal operating conditions).

VI. Important Notes

1. Confirm the axle model, spline tooth number and mounting hole size during selection to avoid adaptation errors; 2. Replace the slack adjuster immediately when exceeding the fatigue life or abnormal torque occurs to prevent braking failure; 3. Non-original factory certified slack adjusters may lead to the invalidation of axle warranty. It is recommended to use genuine parts that meet the standards.

 

Product Parameters

Parameter Specification for Semi-trailer Slack Adjuster

This parameter specification applies to slack adjusters (including manual and automatic types) supporting the braking system of heavy-duty semi-trailers. It clarifies the core technical parameters, application scope, and compliance standards of the product, providing a basis for selection, installation, and maintenance. All parameters comply with the "Safety Technical Conditions for Motor Vehicle Operation" (GB 7258-2024) and QC/T 1033 relevant regulations.

I. Basic Parameters

Parameter Item	Manual Slack Adjuster	Automatic Slack Adjuster	Description
Product Model	Universal Type (for Fuwa Axle): 3-hole 37-tooth; for BPW Axle: 7-hole 10-tooth, etc.	LH-QD 90A-200, AS1140, K047151, etc.	The model must be accurately matched with the axle type
Applicable Axle	13T/16T Fuwa Axle, BPW Axle, Liangshan Axle and other mainstream semi-trailer axles	13T-20T heavy-duty semi-trailer axle, compatible with ABS system	Heavy-duty special models are required for axles with large axle load (≥8t)
Core Material	Main Body: High-strength alloy steel; Gear: Forged steel; Bearing: Ductile iron (QT500-7 and above)	Main Body: 50CrVA/60Si2MnA alloy steel wire (vacuum degassing smelting); Key Components: 304 stainless steel	Ensure fatigue resistance, high and low temperature resistance and corrosion resistance
Applicable Brake Type	Drum brake system	Drum brake system, some models compatible with hydraulic disc brake	Selection based on trailer brake configuration
Weight	2.5-4.0kg (varies by model)	3.0-4.5kg (including automatic adjustment mechanism)	Provide reference for vehicle lightweight design

II. Key Dimension Parameters (Unit: mm)

Parameter Item	Universal 37-tooth Model	BPW-specific 10-tooth Model	Automatic Universal Model
Spline Tooth Number	37	10	10/37 (optional)
Spline Width	20.22	18.5	20.22 (standard model)
Spline Major Diameter	φ40.9	φ39.2	φ40.9
Spline Minor Diameter	φ38.54	φ36.8	φ38.54
Main Body Mounting Hole Distance (A/B/C/D)	127/152.4/177.8/203.2	118/145/168/195	127/152.4/177.8/203.2
Connecting Pin Hole Diameter	φ12.7	φ14.0	φ12.7

III. Performance Parameters

Parameter Item	Technical Standard	Test Data	Remarks
Rated Operating Torque	≥50Nm	50-80Nm (varies by model)	Withstand instantaneous impact force during braking
Adjustment Torque Requirement (Automatic Type)	Clockwise rotation ≤13Nm; Counterclockwise rotation ≥18Nm	Clockwise: 8-12Nm; Counterclockwise: 18-22Nm	Replace the slack adjuster if exceeding the range
Brake Clearance Adjustment Range	0.3-0.8mm	Manual Type: 0.3-0.8mm; Automatic Type: Auto-compensate to 0.4-0.6mm	Ensure braking response sensitivity
Fatigue Life	≥100,000 braking cycles (torque attenuation rate <8%)	Attenuation rate ≤5% after 120,000 cycles	Comply with GB 7258-2024 standard
Operating Temperature Range	-40ºC~+200ºC	-45ºC~+220ºC	Adapt to different regional climate conditions
Corrosion Resistance Grade	Salt spray test ≥48 hours	No obvious rust after 72-hour salt spray test	Adopt electrophoresis + plastic spraying double protection process
Dynamic Balance Grade	ISO 21940 G2.5 and above	G2.0	Reduce vibration and noise during high-speed driving

IV. Installation and Adaptation Parameters

• Installation Torque: Fixing nut tightening torque 180-200Nm (standard model), 220-250Nm (heavy-duty model); Bracket bolt/nut tightening torque 50-60Nm.
• Adaptable Air Chamber Push Rod: Stroke 0mm (retract to initial position before installation), push rod diameter φ12-φ16mm.
• Adaptable Voltage (with electronic monitoring model): 24V DC (comply with semi-trailer general electrical standards).
• Installation Requirement: The same axle must use slack adjusters of the same factory, same model and same type to avoid unbalanced braking force.

V. Compliance and Certification Parameters

• Executive Standards: GB/T 31970 (General Requirements for Braking Systems), QC/T 1033 (Special Requirements for Automatic Slack Adjusters), SAE J2902 (Fatigue Life Verification).
• Product Certification: ISO 9001 quality system certification, some export models pass EU ECE R13 standard certification.
• Warranty Period: 12 months (free replacement for parts quality issues under normal operating conditions).

VI. Important Notes

1. Confirm the axle model, spline tooth number and mounting hole size during selection to avoid adaptation errors; 2. Replace the slack adjuster immediately when exceeding the fatigue life or abnormal torque occurs to prevent braking failure; 3. Non-original factory certified slack adjusters may lead to the invalidation of axle warranty. It is recommended to use genuine parts that meet the standards.

Installation Instructions

 

Installation, Maintenance & Operation Instructions for Semi-trailer Slack Adjuster

1. Product Overview

Core Component: Semi-trailer slack adjuster is a critical safety part of the braking system, responsible for automatically adjusting brake shoe clearance to ensure reliable braking performance. It meets international automotive safety standards and is suitable for various heavy-duty semi-trailers.

2. Installation

2.1 Pre-installation Checks

• Confirm product model matches the trailer brake system.
• Prepare tools: wrench set, torque wrench, lubricant, cleaning cloth.
• Clean installation position; inspect the slack adjuster for damage.

2.2 Installation Steps

1. Align the slack adjuster with the brake camshaft spline and ensure full engagement.
2. Install and tighten the fixing nut to specified torque (see Appendix).
3. Connect to the brake push rod with a pin and secure with a cotter pin.
4. Lubricate moving parts; manually rotate to check for smooth operation.

2.3 Key Precautions

• Avoid excessive force during installation to prevent damage.
• Ensure all fasteners are tightened to specified torque.
• Professional technicians only; incorrect installation causes brake failure.

3. Operation

3.1 Daily Checks

• Inspect for looseness, deformation or oil leakage before each trip.
• Monitor braking performance; stop immediately if response is delayed.
• Release brakes when parked long-term to avoid component stress.

3.2 Adjustment Methods

• Manual: Rotate the adjustment knob clockwise to reduce clearance, counterclockwise to increase.
• Automatic: The adjuster compensates for wear automatically during normal braking; do not interfere manually.

3.3 Operation Warnings

• Do not overload the trailer or use frequent emergency braking.
• No unauthorized modification or disassembly.

4. Maintenance

4.1 Routine Maintenance

Cycle	Maintenance Tasks
5,000km / 3 Months	Clean surface; lubricate moving parts; check connecting pins.
10,000km / 6 Months	Inspect spline wear; recheck fixing nut torque.
30,000km / 12 Months	Thorough cleaning and inspection; replace seals/bearings if worn.
60,000km / 24 Months	Replace the entire slack adjuster assembly.

4.2 Common Faults & Solutions

Fault	Causes	Solutions
No automatic adjustment	Lack of lubrication; foreign objects stuck; damaged components	Lubricate; clean mechanism; replace parts.
Braking noise	Loose fasteners; worn splines; damaged bearings	Tighten; replace worn components.
Manual adjustment failure	Stuck knob; thread damage; body deformation	Clean/lubricate; replace damaged parts.

5. Safety Warnings

1. Faulty slack adjusters cause brake failure and accidents; regular maintenance is mandatory.
2. Perform maintenance with the trailer parked securely, parking brake applied and wheel chocks installed.
3. Only use genuine spare parts that meet original specifications.
4. Stop using the trailer immediately if structural deformation or severe damage is found.

Appendix: Torque Parameters

Model	Fixing Nut Torque (N·m)	Connecting Pin Torque (N·m)
Standard	180-200	35-40
Heavy-duty	220-250	45-50

 

Company Profile