Checking The Guide Plate/Chain Entry Plate; Checking The Hoist Chain - DEMAG DC-Com 1 Operating Instructions Manual

8.5.5.3

Checking the guide plate/chain entry plate

Fig. 42 Load hook side (A), chain collector box
side (B)
8.5.5.4

Checking the hoist chain

Checking wear or deformation of the original Demag chain
In addition to selecting the correct hoist unit for the given application, owners of chain hoists are obliged by rele‐
vant regulations – such as DIN 685 part 5 – to check the round-section steel chain continuously in operation to
ensure optimum operating safety and, therefore, to avoid any accidents.
For single-shift operation, operation according to FEM classification and for chain hoist operating conditions ac‐
cording to  "Operating conditions", Page 27, the chain should be checked once a year (see inspection and
maintenance schedule).
If routine maintenance reveals that the intervals are too long, they should be adapted to the specific operating
conditions.
Visual inspection of the chain
Fig. 43 Chain wear
74
Maximum guide plate dimensions [mm]
DC 1 / 2
DC 5
DC 10
Tab. 52
If a check or inspection reveals that it is worn beyond the specified di‐
mensions or if cracks can be seen on the guide plate, it must be re‐
placed.
Multiple fitting and removal of the guide plate retaining bolts may dam‐
age the thread in the aluminium housing in such a way that a tight fit of
the bolts can no longer be ensured. A "Guide plate accessories" set is
available to do this (part no. 717 830 45), see also "DC 1 - 15 guide
plate accessories" document  Tab. 3, Page 7.
Carry out a visual inspection of the chain before starting work.
If the chain displays deformation, damage, cracks, pitting from corro‐
sion, reduction in the link thickness or increase in pitch dimension due
to wear or elongation as a result of plastic deformation, the chain must
be replaced immediately.
a b c d
16,0 5,5 16,8 6,8
19,4 6,8 21,0 8,9
26,7 9,4 28,8 12,0