Roche Diagnostics May 2009
Service Manual · Version 9.0 B-85
cobas b 221 system 4 Components
Valve s
Replacing the waste valves V13/V18
1
Remove the vacuum pump completely.
e
For instructions, see Replacing the vacuum pump completely on page B-73.
2
Disconnect the two tubes on the vacuum pump protector.
e
For details, see Figure B-58 on page B-75.
3
Loosen the two screws holding the vacuum pump protector by unscrewing them
out about 1 cm.
4
Pull the vacuum pump protector up and remove it.
5
Pull the tube out of the waste valve V13 or V18 (see above).
6
Disconnect the power supply cable of the valve V13 or V18 on the board.
7
Unscrew the two screws holding the waste valve V13 or V18 and remove the valve.
8
Remove the MC valve centering instrument and fasten it to the new valve.
Use the reverse order for assembly.
V13 and V18 are different parts:
V13 = valve undamped
V18 = VP waste valve
A V18 (VP waste valve) B V13 (valve undamped)
Figure B-63 Waste valves V13 and V18
To Next Page
Loading...
