J. D. NEUHAUS Profi 025Ti, Operation Manual

Page: 114 / 218

Move the unloaded load hook until just short of the
upper and lower end positions.
Stop immediately before reaching the end position
and then carefully (by repeatedly pressing the control
element) move to the end position.
The movement of the chain must be stopped due to
deformation of the buffer. For hoists with overload
protection, the lifting movement is additionally
limited by shutting off the motor.
Following successful testing, the buffer must be
unloaded.
DA N G E R !
If the buffer is damaged, do not use the
hoist. The hoist must be repaired (replace
the buffer).
All control elements of the controls must always be
free-moving.
Unload the JDN Air Hoist.
Briefly actuate and release all control elements of the
controls one after the other. The control elements
must return to their initial positions immediately. The
on and off function must operate without problem.
PRESS THE EMERGENCYSTOP. All movement of the
hoist must stop. Actuating the control elements must
not cause a lifting or lowering movement.
RELEASE THE EMERGENCY STOP button by turning.
DA N G E R !
If a control element is stiff or remains in the
actuated position, do not use the hoist. The
control must be repaired.
The main air emergency-stop valve is opened with each
actuation of the controls. It closes when the controls
are released.
Main air emergency-stop valve
With each check, the working order of the valve must
be examined as follows:
Shut off the compressed air supply and unload the
line.
Remove the safety ring 1 .
Pull out the cover 2 .
Press plunger 3 inwards against the force of spring 4 .
It must return again due to the spring force.
If the plunger does not move, the valve must be
repaired.
Check that the direction of movement of the load
hook corresponds to the direction indicated by the
arrows on the control elements.
Independent of the stipulated inspection intervals, the
silencer must be checked for permeability if the hoist
does not achieve the specified lifting speed (see section
Technical data, page 64).
The test is performed by comparing the lifting speeds
under nominal load, with and without the silencer. The
speed with standard silencer or filter silencer must be
at least 80 % of the lifting speed without a silencer
element. In the event of lower values, the silencer
elements must be cleaned or replaced.
C H E C K T H E S I L E N C E R F O R
P E R M E A B I L I T Y
C H E C K I N G D I R E C T I O N O F M O V E M E N T
C H E C K I N G T H E M A I N A I R
E M E RG E N C Y S T O P VA LV E
C H E C K I N G C O N T R O L S A N D
E M E RG E N C Y S T O P F U N C T I O N
C H E C K I N G L I F T I N G A N D
L OW E R I N G L I M I T E R S
powered by air !
M A I N T E N A NC E
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