Shandong Shengyue Technology Development Co.,Ltd is one of the most professional sinotruk mcp16 series tandem rear axle – middle axle air chamber bracket/support 712w43240-0127 manufacturers and suppliers in China. Please feel free to buy high quality genuine auto parts at competitive price from our factory.
SINOTRUK MCP16 Series Tandem Rear Axle – Middle Axle Air Chamber Bracket/Support 712W43240-0127
Key Structural Functions
1. Mounting Point for Brake Chamber (Energy Actuator): This bracket is rigidly bolted to the exterior of the MCP16 intermediate axle housing; it serves to mount and stabilize the intermediate axle's service brake chamber or spring-actuated parking brake cylinder.
2. Ensuring Linear Brake Output: When the driver depresses the brake pedal and the pushrod extends, the bracket must provide rigid support with absolutely zero deformation; this ensures that the thrust from the brake chamber is transmitted-without loss-to the slack adjuster and brake camshaft, thereby guaranteeing braking precision.
Common Causes and Symptoms of Damage
1. Fatigue Cracking Due to Severe Road Conditions and Vibration: If a vehicle operates for extended periods under heavy or overloaded conditions on extremely rough terrain-such as in mining areas or at construction sites-intense counter-impact forces and resonance can cause metal fatigue, leading to micro-cracks or even complete structural failure.
2. Deformation from External Impact: Accidental underbody impacts (bottoming out) or direct strikes against the air chamber by large rocks or obstacles can deform the mounting bracket. This deformation can cause the brake pushrod to bind, resulting in brake drag or ineffective braking.
Bracket & Air Chamber Mounting System [Core Replacement BOM Breakdown]
| No. | Official OEM Part / Drawing No. | Part Name (EN) | Std. Qty | Repair Function & Purpose |
|---|---|---|---|---|
| 1 | 712W43240-0127 | Middle Bridge Air Chamber Bracket | 1-2 pcs | The core replacement item; bolted to the MCP16 housing to firmly support the service/parking brake actuator. |
| 2 | WG9100360303 (Ref.) | Combined Spring Brake Chamber | 1-2 pcs | Supports the dual-layer air brakes (e.g., 30/30 specification); replace if internal seals leak or if the piston degrades. |
| 3 | Q151B1645 (Ref.) | Hex Bolt (M16×45) | 1 set | Grade 10.9 high-tensile bolt used to clamp the chamber bracket securely to the axle housing seat. |
| 4 | Q40316 / Q341B16 | Spring Washer / Hex Nut (M16) | 1 set | Combined pairing with the main bolt to prevent loosening under continuous vibrations. |
| 5 | WG9000360150 (Ref.) | Pneumatic Quick-Connect Elbow Fitting | 2-4 pcs | Connects air hoses to the chamber inlet; replace if the composite material degrades or shows minor air leakage. |
Transmissions & Push-Rod Adjusting Components (Resolving Uneven Wear & Travel Delays)
| No. | Official OEM Part / Drawing No. | Part Name (EN) | Std. Qty | Repair Function & Purpose |
|---|---|---|---|---|
| 6 | WG9100360161 (Ref.) | Automatic Brake Slack Adjuster (Middle Bridge) | 1-2 pcs | Links the air chamber pushrod to the camshaft. Internal one-way clutch wear will cause failure to automatically adjust brake clearances. |
| 7 | 711W43220-0015 (Ref.) | Middle Bridge Brake Camshaft (Left) | 1 pc | Converts slack adjuster torque into linear thrust to expand the brake shoes; must replace if twisted. |
| 8 | 711W43220-0016 (Ref.) | Middle Bridge Brake Camshaft (Right) | 1 pc | Identical function as above, left/right side directional variant; directly pushes the shoe roller. |
DETAILS
| DESCRIPTION | Middle Axle Air Chamber Bracket/Support | PART NUMBER | 712W43240-0127 |
| WEIGHT | 2kg | VOLUME | 285 mm × 165 mm × 130 mm |
| 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 | CHASSIS |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
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