Harrington Hoists and Cranes Series 3 End Truck User Manual
Page 47
7.4
Brake Adjustment
With this gear motor, brake torque can be adjusted within the range of 0 to 50% against the motor rated
torque, with the adjusting bolt. Readjust the brake torque when the braking surface of the disk is
worn and the braking force decreases.
Always set the brake torque for the left and right end trucks at the same value.
a) To adjust brake torque refer to Figure 7-2, Table 7-2, and Table 7-3:
(1) Loosen the lock nut 604.
(2) Brake torque is set by changing the height H of the adjusting bolt 603. The setting range
is within 0 to 50% of the motor’s rated torque.
(3) Tighten the lock nut 604. Do not to allow adjusting bolt 603 to move while tightening the
lock nut.
Figure 7-2 Brake Torque Adjustment
605
606
604
603
Part No.
Part name
603
Adjusting
bolt
604
Lock nut
605
Spring
holder
606
Brake
spring
Table 7-2 Brake torque table
0
10
20
30
40
50
60
7
9
11
13
15
17
H(mm)
T
(%
)
M
Brake Torque Table
(for reference)
T: Ratio of Brake torque
to motor rated torque
H: Height of adjusting
bolt.
M: Set torque
NOTE: Brake is factory
set with H=12mm, which
corresponds to a brake
torque equal to 25% of
rated motor torque.
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