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6.14 Replacing the pneumatic block
Tools required:
•
Crosstip screwdriver, size 2,
•
L-handled socket wrench 10 mm,
•
Special tool WM 22829 from special tool set WM 15349,
•
If necessary, side nippers,
•
If necessary, cable tie,
•
Calibration device WM 22836.
1. Remove the ventilation control knob
so, proceed as follows:
– Turn the control knob
to the left, so that you have a reference
point when reassembling later.
– Lift off the lid
.
34
– Using the special tool, hold the control knob
steady and loosen the nuts with an L-handled
socket wrench (10 mm).
– Pull off the control knob
2. Open the device (see "6.4 Opening the
device" on page 22).
3. Unscrew the circuit board (see „6.12 Replacing
the circuit board" on page 29, steps
You can leave the pressure measurement tube 47
attached to the circuit board.
4. Release the pressure tube
the sleeve of the inlet and pulling out the tube.
5. Pull the ventilation tube
block
.
24
6. Pull the suction connector
tic block
.
24
7. Carefully pull the defective pneumatic block
upwards out of the housing.
8. Pull off the two grommets
9. Take a new pneumatic block
grommets
written side first
and the valve
.
14
32
Repair information and repair instructions
. To do
5
as far as it will go
35
.
35
to
).
2.
9.
by pushing back
48
from the pneumatic
45
from the pneuma-
43
.
39
and push the
24
onto the connection
12
35
5
34
(Two-way switch only on Basic p)
39
+
45
54
43
39
48
(Basic p
only)
Pressure
measure-
ment tubes
12
14
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