Struts / Rods for trucks

Control arm bushes are rubber-and-metal bushes installed on the rear axle of trucks. They reduce vibration occurring in the joints between moving parts. The components consist of two metal sleeves of different diameter, with an elastic element placed between them. They ensure reliable connection of the components of suspension, limit their mobility relative to each other, and ensure absence of squeaking sound during friction.

Types

By the material of the elastic insert:

• Rubber. These are elastic components that can dampen even light impacts. They are widely used and are of low price.
• Polyurethane. These are durable products with high resistance to temperature changes, mechanical damage, and chemicals. Such control arm bushes are more durable compared to the rubber ones, therefore they can less efficiently absorb light impacts that occur when the truck is operated on rough road surface.

Malfunctions and reasons thereof

Service life of the components is not limited by a certain period. The routine maintenance involving visual inspection is recommended to be done after every 50,000 km. It allows detecting the basic faults: cracks or ruptures of the elastic insert, its detachment, insecure attachment, or freeplay. The need for replacement of these car parts may be the result of incorrect installation, or frequent operation of the truck in the off-road conditions.

How to detect faults

Like control arm bushes in passenger cars, these components have such symptoms of failure as: knocking sound heard even in the cabin, squeaking sound during maneuvering, uneven tyre wear. Besides, the vehicle loses stability when moving on rough road. The reason for the diagnostics of the assembly may also be tilt of the car body. Often, it is visible even when the truck is stationary.

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