7
Inspection and maintenance
07.2020
103
ba
-o
.2
.6
.0
-us
-3
.2
-ys
|
A1
18
67
50
1 Re
v A
E
7.9
Hoist motor brake (NM) 4HS.
WARNING
Danger of falling load
Carry out work on the hoist brake only when the hoist is unloaded and the bottom hook
block has been set down.
➢
Switch off the main isolation switch and secure against being switched on again!
(1)
Stopping plug
(2)
Stopping plug
(4)
Stud bolt
(5)
External ventilation
(6)
Stud bolt
(7)
V-ring
(8)
Fastening screws
(9)
Coil carrier
(10)
Anchor plate
(11)
Brake rotor
(12)
Hub
(16)
Fastening screws
Fig. 75
7.9.1
Checking the brake
Remove stopping plug (1)
Remove stopping plug (2) with pliers
Measure the air gap (S) with a feeler gauge (b).
NOTICE
When measuring, ensure that the feeler gauge (b) is slid up to insertion
depth “a” as a minimum and does not become caught on the ledge (!). For the
maximum permissible air gap (S) refer to Tab. 30) The brake is not readjustable.
Once the max. permissible air gap (S) has been reached, the brake rotor must be
replaced.