Smiths Medical Medfusion 3000 Series, Technical & Service Manual

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Parts Replacement
94
40-5648-51B
sembly. 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 remove shim.
6. If seal was damaged, replace with a new seal. Place
small drops of Loctite 454 (cyanoacrylate adhe -
sive) at four points in the slot and then press the
seal into place.
7. Install timing plates and reassemble plunger case
per above.
Left plunger case
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. Remove plunger flippers and gears per above.
3. Gently pull on the plunger cable unplugging it
from connector J2. Unplug force sensor cable from
J1 on plunger board.
4. Using a Phillips screwdriver, remove pan head
screw with washer from the force mount assembly.
5. 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 8
below, otherwise remove float plate seal.
6. 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.)
7. Using a metric 2.5mm hex wrench , remove the
screw holding the float plate.
8. Slide plunger case left toward pump until the two
small flat head screws are accessible on the force
mount. Unscrew two flat head screws on force
mount. Pull plunger cable out of slot on force
mount bracket and plunger tube. Slide off the force
mount assembly from the plunger tube.
9. Slide plunger case left off of plunger tube.
Replacement
1. Install flippers and flipper gears per above into
new plunger case left.
2. Transfer plunger board into new plunger case.
3. Slide new plunger case left onto plunger tube. (En
-
sure case is correctly oriented.)
4. Thread plunger cable through force mount as -
sembly and slide assembly onto plunger tube align
screw holes and cable slot. Apply (mild thread-
locking adhesive) Loctite 242 to flat head screws
and secure the force mount to the plunger tube.
Torque to 100 in oz (1.2 Nm). [Be careful not to
cross-thread screws.]
5. 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).
6. Connect force sensor cable to the plunger board
at connector J1 and press excess cable flat against
board.
7. Press plunger cable into slot though plunger tube,
force mount, and plunger case left. Ensure ex -
posed braid of cable touches metal on force mount
or plunger tube.
8. Connect plunger cable to plunger board connec -
tor J2, and check to ensure cable remains in slot
through force mount and plunger tube.
9. If you did not remove the float plate seal, skip to
step 11. Place the float plate into opening in plung -
er case left and start 2.5mm hex screw into this as -
sembly. 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 remove shim.
10. Use a new seal. Place small drops of Loctite 454
(cyanoacrylate adhesive) at four points in the slot
and then press the seal into place.
11. Install timing plates and reassemble plunger case
per above.