JDN Air Hoists are extremely robust and require little
maintenance. Compliance with maintenance and
inspection intervals is of great importance in order
that the hoist operates safely and reliably over a
period of many years.
C AU T I O N !
Maintenance work on JDN Air Hoists must
only be performed by trained and qualified
personnel.
If your JDN Air Hoist is often used at different
locations, particularly in dirty and damp environments,
clean any dirt off the hoist and the chain,
seal off the air supply connections,
protect the hoist and, in particular, the chain
from corrosion,
store the hoist in a clean and dry place.
If, during repair work, the replacement of components
is necessary, only
original JDN spare parts
may be
installed.
(see section
Lubricants,
page 28)
Series lifting equipment is classified into groups and
dimensioned according to the type of operation (Driving
mechanism classification according to ISO/FEM). The
average daily operating time and the load spectrum
determine the classification. This is assuming that the
lifting and lowering paths are approximately the same.
For devices used mainly in vertical operation (from 75 %
of on-time), the theoretical operating time is reduced
due to the higher lowering speed in the range from
50 % to 100 % of the nominal load.
Therefore, the determined portion of the theoretical
operating time must be multiplied by a factor of f
v
.
The factor f
v
has a value of 1 to 50 % of the nominal
load, increasing linearly to 1.5 at 100 % of the nominal
load (nominal load percentage P).
In order to achieve safe operating periods, the company
must check that the theoretical operating time has been
achieved during each inspection, by the person respon-
sible. This must be documented in the inspection log at
least once annually. The inspection log is only supplied
in the Federal Republic of Germany. Instructions and a
model for determining the actual operating time can be
found from page 41 onwards.
When the theoretical operating time has been reached,
a general overhaul must be performed. Detailed expla-
nations for the determination of the actual operating
time and its documentation can be found in the natio-
nal safety regulations. Alternatively, the calculation
model in this operation manual can be used. The
general overhaul must be initiated by the operator and
must be documented in the inspection log. Information
on general overhaul can be requested from the
manufacturer.
f
v
= 1+ 0.5
P-50
50
(for P > 50%)
I N S P E C T I O N A N D R E PA I R S
L U B R I C A N T S
S PA R E PA R T S
C L E A N I N G A N D C A R E
M A I N T E N A N C E A N D
I N S P E C T I O N I N T E R VA L S
powered by air !
M A I N T E N A NC E
M A I N T E N A NC E
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