M A I N T E N A NC E
Page 42
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 on which braking
material is bonded.
R E M O VA L
Proceed as follows when removing the motor
with the brake:
Disconnect the hoist from the main air supply.
Detach the control valve from the motor (in order to
permit removal of the motor retaining bolts).
Detach the motor from the hoist.
Remove the motor cover bolts
1
and remove the
motor cover
2
with the nameplate
3
. (When the cover
bolts are removed, brake spring tension
4
is fully
released).
Remove the springs.
Remove the brake piston
5
from the internal cylinder
integrated in the motor housing.
Pull out the rotor
6
, removing the vanes
7
and
starting aids
8
.
Note:
If you only wish to check for vane wear or repla-
ce the vanes with the starting aids, please continue
with the section "Checking for vane wear".
Remove the cover bolts
9
and pull out the cover with
the brake lining
10
.
Check the braking surfaces of the brake piston and
the cover with the brake lining for wear and damage,
replace if necessary. The circular wear pattern in the
braking surfaces must not be deeper than 0.2 mm.
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 compressed air pressure must be checked with
the device switched on (the brake drags in the event
of insufficient pressure).
Checking vane wear (see illustration
Checking vane
wear,
page 43). When the air motor vanes are worn,
the motor power and consequently the lifting perfor-
mance of the JDN Air Hoist are reduced. Replacing
the vanes together with the starting aids.
R E P L AC I N G B R A K E D I S C , B R A K E P I S T O N
A N D VA N E S / M O T O R I N S TA L L AT I O N /
M O T O R L U B R I C AT I O N
Replacing brake disc, brake piston and vanes /Motor installation
8
10
9
7 6
12 11 5
4
2
13/14
1
3
Содержание PROFI 10 Ti
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