M
AINTENANCE
8.18. Check silencer
CAUTION
Danger from noise
By removing the silencer, the noise pressure level
of the product increases.
I
Always wear appropriate protection equipment
In addition to the scheduled inspection intervals,
the silencer should be inspected and its flow resis-
tance assessed whenever the hoist fails to reach
the specified lifting speed.
The test is performed by comparing the lifting
speeds under nominal load, with and without the
silencer. The speed 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.
8.19. Check lifting motor
CAUTION
Danger of injury from pre-tensioned
springs
Pre-tensioned springs are released when disas-
sembling the engine covers.
I
Carefully loosen and remove the engine cover!
NOTICE
See the spare parts list for tightening torques
In order to check the lifting motor, it must be re-
moved ((
,
→
Figure 13, the lifting motor can be re-
moved from the hoist to simplify matters):
1. Engine disassembly:
a) Relieve the product and disconnect from
the power supply.
b) Unscrew the nameplate
(1)
.
c) Remove the motor cover bolts
(2)
and
detach the engine cover
(3)
(when the
cover bolts are loosened, the tension in
the brake springs (
(4)
is fully released).
d) Remove the brake springs.
e) Remove the brake piston
(5)
from the
internal cylinder integrated in the engine
housing.
f) Pull out the rotor
(6)
together with
the vanes
(7)
and starting aids
(8)
(if
present, two bore holes can be used to
facilitate assembly).
Page
56
of 64
Doc.-No.: VA049318-10-OM-EN-0319-64-2
