SACHS dampers ensure the reliable and cost-efficient operation of trucks and other commercial vehicles. Like all SACHS spares, they are synonymous with German quality and are especially durable. SACHS dampers for trucks optimize driving comfort and effectively relieve the strain on both vehicle and driver. At the same time, they safely transport even the most sensitive payloads.

Dampers for trucks


A damper is a safety-related component which, together with the spring, forms the end link between the suspension and the vehicle body. It reduces vibration in the suspension spring, slows it down and optimizes road contact.

In addition to conventional dampers for trucks, the SACHS portfolio includes driver’s cabin dampers and axle dampers for trailers. One particularly special innovation is SACHS Continuous Damping Control for trucks. This is a variable system which adjusts damping intensity in real time based on the driving situation.

SACHS dampers for trucks

Regularly inspecting truck dampers


As a rule, commercial vehicle dampers should be inspected and, if required, replaced after no more than 250,000 km. In the process, it’s also a good idea to have an expert check the surrounding components. Early identification of potentially defective components near the dampers prevents costly downtime.

Damage evaluation


Although a damper may appear to be leaking, this may not in fact be the case. A certain amount of “perspiration” is normal, and even necessary to lubricate the piston rod seal. Never assess the dampers after driving in the rain; they should be dry.

Noise during spring compression does not necessarily come from defective dampers.

Therefore, check:

  • axle suspension
  • stabilizer rubbers
  • caps
  • and, of course, check whether the noise is caused by objects in the load compartment.

Cause:

  • Normal wear due to high mileage.

  • Wear due to sand (abrasive effect).

  • Wear due to driving with ride height too high or incorrectly adjusted air spring level setting.

Consequence:

  • Noises (rattling, knocking)

Cause:

  • Insufficient tightening torque.

Consequence:

  • Play between bush and thread crests.

Thread impressions in bush

SACHS thread impressions in bush Thread impressions in bush

If the damper is damaged, this was caused by force - through an accident or an installation error.

Therefore, check:

  • damage on axles and damper anchorage

  • wheel alignment.

Truck damper FAQ


Defective dampers lead to faster wear of adjacent components. Therefore, inspect the suspension-strut mounts, service kits and suspension springs during each damper check. When replacing dampers, also replace the suspension-strut mounts and service kits.

If twin-tube dampers are transported or stored horizontally, air can enter the working cavity. It can be easily and effectively removed by compressing and pulling apart the dampers several times in succession. However, the damper independently vents the air shortly after its installation.

When securing the damper (pin joints/suspension-strut mounts), please pay attention to the correct alignment of the parts. Check the anchorage, steering parts and rubber-to-metal components during each inspection. In this context, it’s advisable to lightly grease the mounting bolts of ring joints. Important: protect rubber-to-metal components from grease!

Underbody protection and dirt from the road sticking to the dampers are often wrongly diagnosed as leakage.