Replacing The Pump - Nellcor NPB-75 Service Manual

Section 7: Disassembly Guide
7.5

REPLACING THE PUMP

7-6
Refer to Figure 7-6: Replacing the Pump.
1 Open the monitor case described in section 7.2 "Opening the
Monitor Case".
2 Remove the Damping cover from the Pump.
3 Locate the two tubings, Main line and Exhaust line, connected to
the Pump, refer to Figure 7-7: Flow System.
4 Locate the purple Main line restrictor and the green Exhaust line
restrictor, refer to Figure 7-7: Flow System.
5 Disconnect both tubings from their restrictors.
Note: Both restrictors must remain with their flow system lines
attached to the CO
6 Disconnect the Pump connector from it's CO
7 Remove the CO
2
"Replacing the CO2 Board".
8 Unscrew and remove the Pump mounting screws.
9 Remove the Lower damping and Damping holder.
10 Remove the Pump and the Upper damping.
11 Place the new Pump.
12 Reassemble the unit, using the new assembly parts, in reverse
order.
Note: Before replacing the pump mounting screws, first dip them into
®
Loctite glue or any other threadlocker glue. Carefully twist the
screws into the Lower damping, gently pressing against the
CO board.
2
Figure 7-6: Replacing the Pump
board.
2
board from the Front Cover, refer to section 7.3
board socket.
2