Cardinal Health IVAC 571, Technical & Service Manual

Page: 63 / 104

IVAC® Volumetric Pump (Models 571 & 572) 63/104 1000SM00018 Issue 2
Spare Parts Replacement Procedures
Mechanism Assembly (continued)
Body Assembly
(continued)
Refitting notes:
1) When refitting the motor, align the two diagonal motor mounting holes with the motor mounting plate before
securing the motor in place with the two screws. Use Loctite 243 on the two screws.
2) When refitting timing pulley (small) onto a replacement motor, install it at the same height as recorded from the old
motor.
3) When refitting the belt, verify the belt tension by pushing on the belt between the pulleys. The belt should easily push
(> 5 pounds of force) by approx. 0.1 to 0.2 inches. Tighten or loosen the belt as required:

Loosen the two motor screws and hold the motor to the mounting plates

Push motor towards the front of the case to lessen belt tension OR pull the motor towards the rear of the case to
increase belt tension.

Retighten the two screws and recheck belt tension.
4) Position timing pulley (large) onto the cam shaft just far enough to keep it off the mechanism plate then tighten the
set screw. When replacing the timing pulley (large), tighten the set screw onto the flat of the cam shaft to ensure
correct flag orientation.
Turn timing pulley (large) so the flag on the timing pulley passes through the optical sensors freely. Ensure the flag
does not rub the sensors. If so, loosen the rotation sensor fixing screw, reposition the flag then retighten the rotation
sensors screw ensuring the rotation sensors do not move.
Motor, Timing Pulleys, Belt
(continued)