User`s guide

Chapter 4 ______________________________________________________________ Maintenance
VAISALA______________________________________________________________________ 149
6. Loosen the three nuts (5) at the bottom of the power supply board
(4) and remove it with a 7-mm tool.
7. Loosen the shaft heating foil (6) (use pliers).
8. Loosen the set screw of the rotating transformer assembly (7) (use
an Allen key).
9. Loosen the spacer screws (8) with a 6-mm tool.
10. Remove the sensor board (9) together with the rotating transformer
assembly (7).
11. Remove the retaining ring (10) (use narrow-pointed pliers) and the
bushing (11) from the shaft tunnel.
12. Remove the upper bearing (12) after pulling out the shaft.
13. Remove the retaining ring (13) at the shaft.
14. Remove the lower bearing (14).
For reassembling the sensor:
1. Install the bearings in reverse order.
2. The rotating transformer assembly (7) is reinstalled together with
the sensor board (9). Its (7) set screw is not fastened until in step 7,
when the power supply board has been reinstalled and the gap
adjusted.
3. When assembling, push the transformer (7) as far up as possible
towards the shaft tunnel.
4. Reassemble the spacer screws (8), the power supply board (4), and
tighten the nuts (5).
CAUTION
Handle the rotating transformer carefully, do not drop or hit.
CAUTION
Handle the shaft carefully, do not drop or hit.
NOTE
Be careful when assembling the bearings, do not drop or hit.
NOTE
Make sure that the four-pin connector (15) fits properly.