J. D. NEUHAUS PROFI 25TI, Original Operation And Assembly Instructions

Page: 35 / 72

powered by air!
Page 35
OPERATION
EMERGENCY STOP DEVICE
These controls are always equipped with an EMERGENCY STOP
device.
In order to avert danger produced by the lifting movement as
quickly as possible, release the pushbuttons - the movement of the
load is then interrupted immediately.
Only press the red EMERGENCY STOP button firmly if this Stop
function fails. The EMERGENCY STOP button engages. This
closes the separate main-stream valve and the load hook comes to
a stop instantaneously. The pushbuttons for lifting and lowering
now no longer function.
The EMERGENCY STOP button can be released again by turning
clockwise. It returns automatically to its initial position.
DANGER!
Never release the EMERGENCY STOP button
before the danger has been eliminated and the stop
function via the pushbuttons has been restored.
ROPE CONTROL
With rope control, the lifting and lowering movements are controlled
directly. Both rope ends are connected via a handle, enabling
sensitive control.
The control elements for rope control and the energy-switching
component of the control valve on the motor (reversing valve) are
positively connected to one another. This connection is designed in
such a way that, in an emergency, the control valve can be reset to
a stable neutral position. The main-stream valve is closed
simultaneously. No additional EMERGENCY STOP device
is required.
Lifting: Carefully pull on the chain with the green handle. The
load is lifted slowly.
Pull harder on the chain in order to increase the lifting speed.
Release the chain slightly in order to reduce the lifting speed.
Lowering: Carefully pull on the chain with the yellow handle.
The load is lowered slowly.
Pull harder on the chain in order to increase the lowering
speed.
Release the chain slightly in order to reduce the lowering
speed.
Rope control
OVERLOAD PROTECTION
The overload protection limits the operating pressure of the
compressed air supplied. It responds as a function of load and is
set to a limit value of approx. 125% of the nominal load. The force
limiting factor then has a value of 1.25.
When the overload protection is activated, lifting is only possible
again once the lowering movement has been switched (unloading
the hoist).
The overload protection may also respond when moving at full
unloaded speed against a load to be lifted, even when it is below
the load size set. We therefore recommend tensioning the slack
chain before lifting the load.
For checking and adjusting the overload protection, see Checking
and adjusting overload protection, page 61.
LOAD HOOK MOUNT
With standard version JDN Air Hoists, the load hook can only be
turned around its longitudinal axis when it is unladen, as the hook
mount in the housing is not equipped with antifriction bearings.