R06.0
16/05/2019
Page 17
5
Maintenance instructions
A type BF bowl feeder essentially requires no servicing. The leaf springs, however, may
oxidize in certain conditions of use, thus affecting the vibration behavior in the long run.
In these cases the leaf springs must be removed and cleaned or be changed. In rare
cases the leaf springs must be completely replaced.
5.1
Replacing the leaf springs
Only one spring assembly may be dismantled at a time when removing the leaf springs.
Before undoing the screws the centering brackets (Table 7:
) must be se-
cured to the drive unit (see Figure 8). These secure the counterweight and mounting
plate and thus prevent these parts sagging or moving.
CAUTION
The leaf springs must not be oiled or greased as this would make
the springs sticky and in turn adversely affect the vibration re-
sponse.
The number of leaf springs in a spring assembly and the structure of the spring assembly
installed must be identical to the original spring assembly. Only then will the device func-
tion correctly.
Figure 8:
Spring assembly and centring bracket
The screws must be tightened using the torque shown in Table 3. During tightening the
screws the spacer washers may not be turned.
Table 3:
Tightening torques for spring installation
Type
Unit
BF20
BF25
BF30
BF35
BF40
BF50
Tightening torque
[Nm]
40
40
79
79
79
135
Spacer
washer
Leaf spring
Centring bracket
Leaf spring
Centring bracket
