Shandong Shengyue Technology Development Co.,Ltd is one of the most professional sinotruk howo dump truck leaf spring top plate wg9525522609 manufacturers and suppliers in China. Please feel free to buy high quality genuine auto parts at competitive price from our factory.
SINOTRUK HOWO Dump Truck Leaf Spring Top Plate WG9525522609
Core Features
1. Clamping & Fastening: Working in conjunction with U-bolts and nuts, the plate securely clamps the stacked leaf spring assembly onto the axle. By exerting uniform and substantial surface clamping force, it ensures the leaf spring assembly remains stable and tight, preventing vertical bouncing or structural loosening during severe impacts.
2. Positioning & Anti-Shift: A positioning hole in the center of the plate engages the leaf spring's center bolt, preventing longitudinal shifting of the spring leaves during acceleration, braking, or hill climbing. Additionally, the plate's precise fit against the U-bolts restricts lateral sliding during cornering or traversing potholes, thereby maintaining wheelbase stability.
3. Stress Distribution: When a heavy-duty truck is fully loaded, the rear axle bears several tons of vertical load. Without this plate, the curved tops of the U-bolts would press directly against the main leaf spring, creating extreme localized stress concentrations that could easily lead to premature fatigue failure or breakage. The plate distributes the U-bolts' tension evenly across the entire contact surface of the leaf spring, protecting it from localized crushing damage.
Rear Suspension Single-Side Overhaul BOM
Because the left and right sides are symmetrical, if a major overhaul is to be performed on both sides, please multiply the following quantities by 2.
| No. | Part Number | Part Name (EN) | Qty | Core Function & Technical Requirements | Maintenance Recommendation |
|---|---|---|---|---|---|
| 1 | WG9525522609 | Leaf Spring Top Plate / Clamping Plate | 1 | High-strength cast/forged steel; distributes clamping force of U-bolts. | Core item to be replaced |
| 2 | WG9525522610 | Rear Spring Rear Bracket / Wheel Spring Bracket | 1 | Cast steel; supports and guides the sliding displacement of the leaf spring rear end. | Check for cracks or severe wear; replace if necessary. |
| 3 | WG9525522627 | Rear Axle Shock Absorber Upper Bracket | 1 | Fixes the upper end of the rear shock absorber; withstands alternating tension and compression. | Check welding or bolted joints for fatigue cracks. |
| 4 | Model Specific | Rear Leaf Spring Assembly | 1 | Multi-leaf high-strength spring steel; core load-bearing and shock-absorbing component. | Replace the entire assembly if sagging under full load or if single leaf breaks. |
| 5 | Specification Specific | U-Bolt (Ride Bolt) | 2 | High-strength alloy steel (e.g., 40Cr); core locking tensioner of the suspension. | Mandatory replacement (Never reuse after old bolts stretch). |
| 6 | Matched with U-Bolt | High-Strength U-Bolt Nut | 4 | Grade 10.9 or 12.9 thickened locking nut. | Mandatory replacement. |
| 7 | Matched with U-Bolt | Thickened & Tempered Washer for U-Bolt | 4 | Increases contact area; prevents nuts from biting into the top plate or bracket. | Replace along with the U-bolts. |
| 8 | Matched with Spring | Leaf Spring Center Bolt (Center Pin) | 1 | Aligns center of multi-leaf springs; head fits into top plate positioning hole. | Must be replaced when changing leaf springs or reassembling leaves. |
| 9 | WG9112520005 (Ref) | Leaf Spring Pin (Shackle Pin) | 1 | Quenched and tempered 45# steel; connects spring front end to chassis bracket. | Must be replaced if stepped wear or excessive clearance is found. |
| 10 | WG9114520015 (Ref) | Leaf Spring Bushing (Composite/Polyurethane) | 1 | Pressed into leaf spring eye; reduces metal friction and isolates vibration. | Wearable item; direct replacement recommended during overhaul. |
| 11 | Model Specific | Rear Shock Absorber Assembly | 1 | Cylindrical hydraulic shock absorber; suppresses leaf spring rebound bouncing. | Check for oil leaks or loss of damping force; replace if necessary. |
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