CARE AND MAINTENANCE 7
MHL360 E 7.7
7.2.5 Crack test on the machine
Whatever the reason, location, duration and
conditions of their use, all machines are sub-
ject to a variety of loads. These various loads
result in service lives of differing lengths for
different components of the machine. This
can result in cracks and loose connections,
especially on load-bearing parts. To maintain
operating safety, the machine must therefore
be checked weekly for cracks, loose connec-
tions and other visible damage.
To check for cracks, it is always necessary
for the machine to be kept clean and be
cleaned regularly.
To carry out these tests, they should be
performed on a solid, level surface, with a
changing load and using equipment in longi-
tudinal and transverse direction. Relevant
accident prevention requirements must be
observed.
Particular care is required when testing
bearing parts, specifically:
- steel construction undercarriage with axle
and gear bearings, outrigger, lower slew-
ing ring support and slewing ring
- steel construction uppercarriage with
bearing block for boom and boom cylin-
der, upper slewing ring support, cab bear-
ing, fastening of swing gear and counter-
weight
- steel parts of the loading equipment, e.g.
boom, dipperstick and grab
- hydraulic cylinders, axles, steering, bolts
and bolt connection, steps, ladders, and
fastening elements
- The crack test must be performed visual-
ly. To increase test reliability, the color
penetration procedure should be used if a
crack is suspected or in places that are
difficult to see, for example the slewing
ring support.
Any damage that is discovered must be
repaired immediately. Welding work on
load-bearing parts of loading machines
must only be performed by specialist per-
sonnel, and only in accordance with accept-
ed welding engineering practice. If you are
in any doubt, consult your dealer or a
TEREX | Fuchs service engineer for advice
on how to proceed.
To Next Page
Loading...
