12
Operating instructions – BMG..T Double Disc Brakes for Stage Applications
6
Customer service
Inspection/Maintenance
Static check
Brakes in the BMG..T series have a dual circuit braking function. The permitted load
torque during operation is much lower than the rated braking torque.
Before performing the static check described here, you must ensure that the transmis-
sion components are strong enough to cope with the test ratings. The strength must be
proven beforehand.
The static check is used to test the total braking torque of the individual brake discs; that
is, the braking circuits are subjected to load at the same time. Choose the static
reference torque according to the following table and apply the torque once you have
secured or lowered the mobile flying equipment and rigging system.
To check the backup and safety factors in a single test, 250 % of the permitted load
torque is applied as a static reference torque.
6.3
Customer service
Please have the following information to hand if you require the assistance of our
customer service team:
•
Data from the nameplate (complete)
•
Nature and extent of the fault
•
Time and peripheral circumstances of the fault
•
Presumed cause
Brake type
Rated brak-
ing torque
Permitted
load torque
Dynamic ref-
erence
torque
Static refer-
ence torque
BMG4T
40 (2 x 20)
13
16
32
20 (2 x 10)
6.5
8
16
BMG8T
75 (2 x 37.5)
25
31
62
37 (2 x 18.5)
12
15
30
BMG15T
150 (2 x 75)
50
62
125
100 (2 x 50)
35
44
88
If the system cannot cope with the specified static torque during the test, stop the
test immediately. This means that the dual circuit brake function is not ensured.
Stop the mobile flying equipment or rigging system, remove the brake and check
it.
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