8.5.5 Chain drive
8.5.5.1 Checking the sprocket wheel
Since the sprocket wheel is replaced together with the chain set, at normal conditions no further check is necessary.
However, if you find that the chain does not run smoothly over the sprocket wheel, this may indicate wear.
8.5.5.2 Checking the chain guide
Fig. 45 Example for defective chain guide
The chain drive can move easily on the drive shaft, i.e. a lateral play of
approx. ±2 mm is normal. A defective chain guide must be replaced im‐
mediately.
● Open the service cover.
● Check the chain guide for damage, e.g. halves burst open or loose fit
of the screws.
8.5.5.3 Checking the guide plate
If a check or inspection reveals that the dimensions specified are exceeded due to wear or if cracks can be seen on
the guide plate, it must be replaced at once.
Fig. 46
Maximum dimensions of the guide
plate
a b c d
[mm]
[mm] [mm] [mm]
DC 1 / 2 16,0 5,5 16,8 6,8
DC 5 19,4 6,8 21,0 8,9
DC 10 26,7 9,4 28,8 12,0
Tab. 52
Multiple fitting and removal of the guide plate retaining bolts may damage the thread in the aluminium housing in
such a way that a tight fit of the bolts can no longer be ensured. For this purpose a set "Guide plate accessories" is
available (part no. 717 830 45), see also brochure Guide plate accessories DC 1 - 10 ⇒ Tab. 3, Page 7.
8.5.5.4 Checking the hoist chain
Checking the discarding status of the original Demag chain
In addition to selecting the correct hoist unit, owners of hoist units are obliged by DIN 685 part 5 regulations to
constantly check the round section steel chain in order to ensure optimum operating safety and, therefore, to avoid
serious accidents.
For single-shift operation, operation in accordance with FEM specification and for operating conditions of the chain
hoist in accordance with ⇒ "Operating conditions", Page 28, 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.
Measuring wear or deformation of the original Demag chain
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