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

Page: 50 / 72

powered by air!
Page 50
MAINTENANCE
MOTOR INSTALLATION AND INSPECTION
CHECKING THE
Brake linings
Vanes
Motor lubrication
Motor installation / Replacing brake discs, brake piston and vanes
The motor and brake functions are achieved in part by means of
shared components. The braking action is applied at the lateral
surfaces of the rotor. The rotor is pressed via spring force from the
cover-side of the motor against a second braking surface located on
the opposite side by means of a piston onto which braking material
is bonded.
REMOVAL
The hoist must first be unloaded and disconnected from the main air
supply.
Note: The following operations can be performed from
the nameplate side after the motor has been removed.
Checking vane wear, replacing the vanes with starting aids if
necessary.
Checking brake wear, replacing the brake piston if necessary.
Renewing the motor lubrication.
The replacement of the centre section halves with brake lining is
described under a separate item.
Remove the nameplate 1.
Remove the motor cover bolts 2 and detach the motor cover
3 (when the cover bolts are removed, tension in the brake
springs 4 is fully released).
Remove the brake springs.
Remove the brake piston 5 from the internal cylinder
integrated in the motor housing.
Remove the rotor 6 together with vanes 7 and starting aids 8.
Checking vane wear:
(See illustration Checking vane wear, page 51). When the vanes
are worn, the motor power and consequently the lifting performance
are reduced. The vanes and starting aids must always be replaced
together.
Checking braking surfaces of the brake piston and the centre
section half with brake lining for wear and damage:
The circular wear pattern in the braking surfaces must not be
deeper than 0.2 mm (see also illustration on page 51). The
extremely low-wear braking material will not reach the wear limit of
0.2 mm within the design-dependent service life of the hoist, under
intended use. Should the wear limit be reached prematurely, the
actual pressure must be checked with the device switched on (the
brake drags in the event of insufficient pressure).