JDN Air Hoists are extremely robust and require little
maintenance. Compliance with maintenance and inspec-
tion 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 loca-
tions, 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 21)
Series lifting equipment is classified into groups and
dimensioned according to the type of operation (Driving
mechanism classification according to ISO/FEM). The
classification (M3/1 Bm) is determined by the average
daily operating time (max. 1 hour) and the load spec-
trum. The theoretical operating time for load spectrum
2 (average) is 1600 hours. This corresponds to 400 full-
load hours. This is assuming that the lifting and lower-
ing 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 31 onwards.
When the theoretical operating time has been reached,
a general overhaul must be performed. Detailed explana-
tions for the determination of the actual operating time
and its documentation can be found in the national
safety regulations. Alternatively, the calculation model
in this operation manual can be used. The general over-
haul must be initiated by the operator and must be doc-
umented 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
Page 29
M A I N T E N A NC E
Summary of Contents for JDN mini 1000
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