41 192-550002N10 ETH March 2019
3.3.3. Exchanging the toothed belt (ETH100&125)
ETH100&125
Figure 38: Exchanging the tooth belt ETH1xx
Dismantle the motor (see page 23)
The internal ballscrew is not self-locking!
Always take care, especially in vertical position of the ETH cylinder that the piston
Toothed belt detensioning
Slightly loosen 4 screws (please refer to Figure 38 Pos.7) by 1 or 2 turns.
ATTENTION! Do not remove the screws entirely!
Loosen central toothed belt tensioning screw (please refer to Figure 38 Pos.12).
The drive unit must lower slightly when the tensioning screw is loosened.
Loosen tightening screw (please refer to Figure 38 Pos.12) until the drive unit is
not lowered any further.
Loosen 5 screws (please refer to Figure 38 Pos.1) and remove lid (please refer to
Figure 38 Pos.3). If the lid can not be removed easily (please refer to Figure
38 Pos.3), try to remove it with a slightly pivoting movement.
Remove middle bar (please refer to Figure 38 Pos.5) with seal.
Loosen 4 screws (please refer to Figure 38 Pos.8) of the upper bearing flange
(please refer to Figure 38 Pos.16) (do not remove entirely).
Unscrew 4 screws (please refer to Figure 38 Pos.7) and remove motor flange
(please refer to Figure 38 Pos.17).
Make sure not to insert your fingers between motor / gearbox and electro
cylinder!
We recommend to place a support pad between motor and cylinder profile.
Completely unscrew toothed belt tensioning screw (please refer to Figure
38 Pos.12).
ATTENTION! Secure upper bearing unit (please refer to Figure 38 Pos.18)
against falling.
CAUTION! Danger of crushing: Do not place your hands or fingers between
upper bearing unit and parallel housing.
Remove upper bearing unit with toothed belt (please refer to Figure 38 Pos.18).
Loosen four screws (please refer to Figure 38 Pos.8) of the upper bearing flange
and remove bearing flange (please refer to Figure 38 Pos.16) from the bearing
(please refer to Figure 38 Pos.19).
Remove hollow shaft with the two bearings (please refer to Figure 38 Pos.19)
from the bearing housing (please refer to Figure 38 Pos.18).
Now, the toothed belt can be removed and the new belt can be inserted.
3
11
5
20
4
1
18
6; 9
2
7
8
16
17
21
19
12; 10; 13; 14; 15
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