Smiths Medical Medfusion 3000 Series, Technical & Service Manual

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Parts Replacement
93 40-5648-51B
5. Grab float plate seal with pliers (or hemostats) and
pull off from plunger case left. (Float plate seal is
glued in place and may be damaged in removal.)
6. Using a metric 2.5mm hex wrench , remove the
screw holding the float plate.
7. Slide plunger case left toward pump until plunger
board is accessible, then remove plunger board.
Replacement
1. Insert new plunger board into plunger case left.
(Ensure board sits on two guide pins and does not
interfere with flipper gears.)
2. Slide the plunger case left up and over the force
mount assembly. Secure in place with the flat
washer and pan head screw. Torque to 100 in oz
(1.2 Nm).
3. Connect force sensor cable to the plunger board
at connector J1 and press excess cable flat against
board.
4. Connect plunger cable to plunger board connec -
tor J2, and check to ensure cable remains in slot
through force mount and plunger tube.
5. If you did not remove float plate/seal skip to step
7; otherwise, place float plate into opening in
plunger case left and start 2.5mm hex screw into
this assembly. Slide a .002” shim between float
plate and the wall of the plunger case. Tighten
screw and torque to 100 in oz (1.2 Nm), then re -
move shim.
6. Use sharp tool or knife to clean slot for seal. If seal
was damaged, replace with a new seal. Place small
drops of Loctite 454 (cyanoacrylate adhesive) at
four points in the slot and then press the seal into
place.
7. Install timing plates and reassemble plunger case
per above.
Force sensor
Note: Ensure plunger head is fully extended away
from pump housing before starting.
Additional tools needed
For this disassembly procedure you will also need:
• .002” (.051mm) shim
Removal
1. Disassemble plunger case and remove timing
plates per above.
2. Gently pull on the plunger cable unplugging it
from connector J2. Unplug force sensor cable from
J1 on plunger board.
3. Using a Phillips screwdriver, remove pan head
screw with washer from the force mount assembly.
4. On newer assemblies it is not necessary to remove
float plate seal. Gently try to pull plunger case left
towards the pump. If it comes apart skip to step 6
below, otherwise remove float plate seal.
5. Grab float plate seal with pliers or hemostats and
pull off from plunger case left. (Float plate seal is
glued in place and may be damaged in removal.)
6. Using a metric 2.5mm hex wrench , remove the
screw holding the float plate.
7. Slide plunger case left toward pump until the hex
head screw is accessible on the force mount as -
sembly.
8. Using a metric 2.5mm hex wrench , remove the
screw holding the force sensor onto the force
mount. Note the orientation of the cable on the
force mount.
Replacement
1. Install the new force sensor onto the force mount
bracket with the 2.5mm hex screw. (Ensure the
cable of the force sensor faces towards the plunger
PCB and connector J1.) Torque to 100 in oz (1.2
Nm).
2. Slide the plunger case left up and over the force
mount assembly. Secure in place with the flat
washer and pan head screw. Torque to 100 in oz
(1.2 Nm).
3. Connect force sensor cable to the plunger board
at connector J1 and press excess cable flat against
board.
4. Connect plunger cable to plunger board connec -
tor J2, and check to ensure cable remains in slot
through force mount and plunger tube.
5. If you did not remove float plate seal skip to step 7;
otherwise, use sharp tool or knife to clean slot for
seal. Place the float plate into opening in plunger
case left and start 2.5mm hex screw into this as -