The control elements of the controls must
always be easily moving.
왘
Unload the JDN Air Hoist.
왘
Briefly actuate and release all control elements of the
controls one after another. The control elements must
return to their initial positions immediately. The
switching on and off function must operate correctly.
왘
Press the EMERGENCY STOP button.
Each movement of the hoist must stop.
Actuation of the control elements must not cause
a lifting or lowering movement.
왘
Release the EMERGENCY STOP button by pulling.
The control piston of the control valve at the motor
must be free-moving. If the seat at the sealing ring
does not close, the air supply escapes directly into the
outlet air chamber.
If the ball in the inner seat of the control piston does
not close, outlet air escapes at the hand control valve.
DA N G E R !
If a control element is stiff or remains in
the actuated position, do not use the hoist.
The controls must be repaired.
The silencer must be checked for permeability if the
hoist does not achieve the specified lifting speed
(see section
Technical data,
page 43).
The test is performed by comparing the lifting speeds
under nominal load, with and without the silencer.
The speed with silencer must be at least 65% of the
lifting speed without a silencer element. In the event
of lower values, the silencer elements must be replaced.
DA N G E R !
Never employ the hoist in daily
use without silencer elements!
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 C O N T R O L S A N D
E M E RG E N C Y S T O P
powered by air !
M A I N T E N A NC E
Page 35
Summary of Contents for JDN mini Series
Page 47: ...powered by air NOTES Page 47...
