Crack Test For Fork Arms; Deformation Of The Fork Arms - Vetter ManuTel Operation Manual

Maintenance
Checking the fork arms > Deformation of the fork arms
6.4.3

Crack test for fork arms

6.4.4

Deformation of the fork arms

36
Fig. 13: Shaft fork arm suspension
To ensure a reliable check, first dismantle
Ä Chapter 6.5 "Cleaning the fork carrier and fork arms"
on page 43 and clean
on page 42 the shaft fork arm.
n Check the welds of the fork sockets for cracks, deformation, and wear. If defective,
immediately ban any further use of the shaft fork arms. Commissioning must only be
carried out after a successful repair.
n Check the sockets of the fork arms for deformation and wear. To do so, measure the
inner dimension of the fork socket and the diameter of the shaft using a caliper
gage. If the differences are greater than 0.079 mm inches (2 mm) (Fig. 13), the per-
missible value has been exceeded. In those cases, replace the fork arms in pairs
immediately.
Have crack tests performed in the area of the fork bend and fork hook welds by a
trained service specialist. If there are any signs of cracks, immediately ban any further
use of the fork arms.
If the geometry of the unloaded fork no longer corresponds to the delivery state, there
is deformation present. The straightening of fork arms must only be performed by the
manufacturer or by a company authorized by the manufacturer.
Fork carrier with fork arms
Ä Chapter 6.6 "Replacing the fork arms"