Installation
415GA01217_C0002_A5 - 0510/20165 - © Oerlikon Leybold Vacuum
3.5.2 Fitting the Coupling
The TRIVAC is supplied by VOLV with the coupling (Fig. 8.5) pre-assembled
on the pump’s shaft. Enclosed there are the coupling half (Fig. 8.6) for the
motor side and the coupling element. Some pump types show a fan wheel at
the coupling half of the motor side.
Tighten the M8 screws to mount the intermediate flange to the motor flange.
Check to ensure that the handle has been correctly fitted within the interme-
diate flange. Fit the gasket (cf. Fig. 8.6 as well as for the torques).
Check the shaft journal and the shim ring for any damage.
Lightly grease shaft journal and the bore in the coupling half.
Warm the coupling half (to approximately 80 °C) and push, respectively press
it on to the shaft journal.
The bores in the coupling are manufactured to tolerance class H7, the shaft
journals of the motor to tolerance classes j6 resp. k6.
The axial distance L1 needs to be maintained (see Fig. 8.7).
When not complying with this requirement there exists the likelihood of a
mechanical contact and thus the creation of sparks between the coupling
halves.
Affix the coupling half with the M5 set screw (torque = 2 Nm).
WARNING
Fig. 8.6 Mounting the coupling half at the motor
1
2
3
4
5
6
7
8
9
10
1 Handle
2 Motor
3 Intermediate flange
4 Set screw M5
5 Screw M6 (5.5 Nm)
6 Scew M8 (12.5 Nm)
7 Gasket
8 Motor coupling half with fan
9 Coupling element
10 Pump coupling half (pre-assmbl.)
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