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SINOTRUK HOWO TRUCK SPARE PARTS Front Brake Drum 81.50110.0232
FUNCTION
1. Generating Braking Force:
This front brake drum is mounted on the front axle hub and operates in conjunction with the brake shoes. When the brake pedal is depressed, the brake shoes expand outward-actuated by the brake wheel cylinder-and press firmly against the inner surface of the brake drum. This action generates a powerful braking force, causing the front wheels to decelerate or come to a complete stop.
2. Core Component of the Front Wheel Braking System:
It serves as the primary friction surface within the drum braking system, directly responsible for converting hydraulic or pneumatic energy into mechanical friction force to ensure reliable braking for the vehicle.
Working Principle
The high thermal capacity of cast iron allows it to rapidly absorb and dissipate the substantial heat generated during braking, thereby preventing brake fade (thermal fade).
Installation Location
Mounted on the front axle hub, it constitutes a core component of the Drum Brake System.
Each front wheel is paired with a single brake drum (one for the left side and one for the right).
The brake drum fits over the wheel hub spindle via its central bore, and its inner surface serves as the braking friction surface, making direct contact with the brake shoes.
Performance Advantages
| No. | Performance Advantage Category | Detailed Advantage Description |
|---|---|---|
| 1 | High Strength & Durability | Made of national standard gray cast iron HT250 with added carbon, silicon, manganese and other elements. High strength and excellent fatigue resistance. Reinforced rib design prevents cracking, deformation or "bell mouth" expansion. Long service life (can reach 80,000–100,000+ km under heavy-load conditions). |
| 2 | Excellent Heat Dissipation | Large heat capacity and good thermal conductivity of cast iron material. Quickly absorbs and dissipates high temperatures (up to 600°C+) generated during braking, effectively preventing brake fade and high-temperature deformation. Ensures stable performance during long descents or frequent braking. |
| 3 | Braking Stability & Safety | Precisely machined 410 mm inner diameter provides uniform friction surface. Tight fit with brake shoes delivers strong and stable braking force. Dynamic balancing test ensures high concentricity, reducing brake vibration and noise, and improving driving safety. |
DETAILS
| DESCRIPTION | Front Brake Drum | PART NUMBER | 81.50110.0232 |
| WEIGHT |
40KG |
VOLUME |
Brake Surface Diameter：410 mm Total Height：232 mm Brake Surface Width / Depth：187mm |
| TRUCK MOLDE | SINOTRUK | QUALITY | Copy,High Copy, OEM,Original |
| MOQ | 1 | WARRANTY | 1 year |
| PAYMENT | TT/WESTEN UNION | SHIPMENT | by air/sea/railway |
| BRAND | SINOSACHS | PLACE OF ORIGIN | JINAN CITY,CHINA |
| STOCK | IN STOCK | APPLICABLE SITE | BRAKE |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
Daily Maintenance Recommendations
Perform a detailed inspection every 10,000 to 20,000 kilometers, or in conjunction with tire maintenance (for vehicles subject to heavy loads, mountainous terrain, or frequent braking, it is recommended to shorten this interval to 5,000 to 10,000 kilometers).
Inspection Checklist:
Visually inspect the outer surface of the brake drum for cracks, severe scoring, thermal deformation, or "bell-mouthing" (flaring).
Check the wear on the inner diameter of the brake drum (the standard inner diameter is 410 mm; the wear limit is typically 412–414 mm-replacement is required if this limit is exceeded).
Check the thickness of the brake linings (replacement is mandatory if the remaining thickness falls below 5 mm).
Verify that the brake clearance is within normal limits; listen for any abnormal noises, vibrations, or signs of brake pull (vehicle drifting to one side during braking).
Check for loose wheel nuts, and verify that the brake air chambers and slack adjusters are functioning correctly.
Check the brake drum for signs of overheating (indicated by surface discoloration-such as bluing-or excessive grease/oil contamination).
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