Vaisala WAV151 - Manual (Page 18)

User's Guide ________________________________________________________
16 _____________________________________________________ M210294en-A
Replacing Consumables
Replacement of the bearings should only be done by a
trained technician. To replace the ball bearings, follow the
procedure below and refer to Figure 6 on page 19.
1. Open the vane assembly fixing screw with a 2-mm
Allen key. The correct screw is the lower one shown in
Figure 6 on page 19. Remove the assembly.
CAUTION The vane assembly fixing screw has been treated with
sealant. Do not remove the fixing screw to ensure perfect
sealing.
2. Loosen the hex nut of the connector with a 27-mm
tool.
CAUTION Be careful not to bend the connector pins.
3. Loosen the three pan head screws at the bottom of the
sensor body with a 7-mm tool.
4. Remove the lower body assembly by pulling it straight
outwards.
5. Loosen the spacer screws with a 7-mm tool and
disconnect the heating element outlet.
6. Remove the printed circuit board.
CAUTION Do not twist or bend the connector. This may break the
pins.
7. Loosen the fixing screw of the code disc with a 2-mm
Allen key and remove the disc.
8. Remove the external retaining ring (using narrow-
pointed pliers).
9. Remove the spacer ring.