HOWO Truck spare parts Lower Thrust Rod Assembly AZ9631521174

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HOWO Truck spare parts Lower Thrust Rod Assembly AZ9631521174 used for HOWO and Styer dump truck parts.

It connects the rear axle housing or balance beam to the lower part of the vehicle frame, transmitting longitudinal thrust and torque during vehicle acceleration, braking, and climbing.

Function

1. Transmitting longitudinal thrust and braking force: As a lower longitudinal thrust rod, one end connects to the rear axle housing and the other end connects to the lower longitudinal beam of the vehicle frame. It withstands the forward thrust generated during vehicle acceleration, starting, and heavy-load climbing, as well as the backward thrust during braking, deceleration, and downhill driving. This prevents the rear axle/drive axle from moving or shifting longitudinally, ensuring efficient power transmission from the engine/transmission to the ground tires, and improving traction and braking stability.

2. Maintaining axle longitudinal positioning and parallelism: Working in conjunction with the upper thrust rod WG9970521175, it forms an upper and lower thrust rod system, strictly limiting the longitudinal degrees of freedom of the rear axle, maintaining the parallel relative position between the axle and the frame, and preventing the axle from "tilting forward/backward" or changes in wheelbase. This prevents axle misalignment, which can lead to uneven tire wear, suspension failure, or vehicle drifting when driving on heavy-duty mining areas or rough roads.

3. Absorbs part of the torque and lateral forces: The rod body withstands the reaction torque transmitted from the drive axle,helping to absorb lateral impacts and forces from the road surface, reducing excessive torsional deformation of the leaf springs or air suspension. The ball joints/rubber bushings at both ends provide a flexible connection, cushioning vibrations, impacts, and noise, improving overall vehicle comfort and component lifespan.

4. Heavy-duty and impact-resistant design: Made of high-strength steel (forged/welded steel pipe), with a rod diameter of approximately 54 mm, capable of withstanding tens of tons of pushing and pulling force. The ball joints/articulations at both ends allow for a certain degree of angular movement, adapting to suspension extension and uneven road surfaces, ensuring reliable power transmission over the long term.

DETAILS

Once damaged, it will directly affect vehicle stability, leading to axle movement, steering misalignment, severe tire wear, suspension noise, and even increasing the risk of rollover or causing a chain reaction of failures in the drivetrain.

Preventive replacement recommendations: Check ball joint clearance every 50,000–80,000 kilometers (replace if the clearance exceeds 2mm when using a pry bar), rod straightness, and degree of corrosion. Replace immediately if abnormal noise or looseness occurs. It is recommended to replace them in pairs (left and right sides) or replace both upper and lower thrust rods together to avoid uneven stress distribution caused by single-side failure.

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