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Sinotruk Howo A7 Dump Truck Spare Parts New Rear Support Engine Wg9925590350 WG9925590270 WG9925590410for Sitrak Howo 371 Model

The OEM part number WG9925590410 refers to the Engine Rear Support, also known as the Rear Engine Mount or Motor Mounting Pad, used on SINOTRUK HOWO A7, SITRAK C7H/C9H, and other series heavy-duty trucks equipped with WD615 and MAN-technology-based engines. This component forms a critical part of the engine suspension system, connecting the rear section of the engine block to the vehicle chassis frame.
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  • WG9925590350 WG9925590270 WG9925590410

  • Sinotruk HOWO

Attribute Description
Part Name Engine Rear Support / Rear Engine Mount / Engine Mounting Pad
OEM Number WG9925590410
Position Mounted at the rear end of the engine, typically near the flywheel housing or gearbox interface
Material
• Outer housing: High-strength steel plate

• Internal core: Vibration-damping rubber compound (70°A–80°A Shore hardness)
Design Type Rubber-metal bonded structure with bolt-through flange mounting
Load Capacity Supports several hundred kilograms of engine mass under dynamic conditions
Damping Performance Absorbs engine vibrations and torsional shocks during acceleration, deceleration, and idle
Sealing Level Fully sealed design — resists oil mist, moisture, and dust ingress
Dimensions Standard OEM size — designed to match original chassis and engine cutouts
Weight Approx. 3.0 – 4.5 kg
Function
• Supports engine rear load

• Reduces noise, vibration, and harshness (NVH)

• Maintains drivetrain alignment

• Prevents stress cracking in engine mounts
Condition Brand new (OEM fresh stock or premium aftermarket)
后支撑发动机 -3

Name1

后支撑发动机 -4

Name2

Important Usage & Installation Notes

  1. Professional Installation Required

    • Involves lifting the engine slightly — must be done by trained technicians using proper jacks and safety stands.

    • Never rely solely on hydraulic jack.

  2. Support the Engine Properly

    • Use an engine support bar mounted to the chassis rails.

    • Remove only one mount at a time if possible.

  3. Replace in Pairs When Necessary

    • If one rear mount is damaged, inspect all other engine supports.

    • Replace together to ensure balanced load distribution.

  4. Align Before Final Tightening

    • Ensure mounting holes align perfectly before tightening bolts.

    • Misalignment causes stress and early failure.

  5. Torque Bolts to Specification

    • Typically requires 100–150 Nm depending on thread size.

    • Under-tightening → loosening; Over-tightening → cracked bracket or stripped threads.

  6. Inspect for Oil Contamination

    • Oil-soaked mounts lose elasticity — replace immediately if swollen or sticky.

  7. Check for Cracks and Separation

    • Rubber tearing

    • Metal fatigue

    • Delamination between steel and rubber

    • Look for visible signs of:

    • Replace at first sign of damage.

  8. Avoid Using Damaged Units

    • Do not install a cracked or deformed mount — risk of complete failure.

  9. Use Genuine or High-Quality Replacements

    • Low-cost imitations often use inferior rubber compounds that harden quickly.

  10. Storage Advice

    • Store upright in dry indoor environment.

    • Keep away from direct sunlight and ozone sources (e.g., motors).


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