Welch Allyn 53 Service Manual page 59

Disassembly Procedure
a. Disconnect the tubing from the manifold on the NIBP board.
b. Disconnect the two sections of tubing from the pump.
NIBP tubing
connection points
on the pump
NIBP tubing
connection points
on the manifold
c. Cut the tie-wrap to free the pump from the pump holder.
If your monitor has a printer, it is much easier to remove and install the NIBP
pump through the printer door, after the printer assembly is removed.
2. Remove the NIBP board.
a. Remove the four screws securing the NIBP board to the rear chassis.
Vital Signs Monitor Series 300
Disassemble and Remove the NIBP Assembly
59 Service Manual