Smiths Graseby 3200, Technical & Service Manual

Page: 77 / 117

Smiths Medical International Ltd.
Issue 5 (August 2004) 3200 Service Manual 5 — 7
Repair procedures
There is a plastic coupling between the leadscrew and the gearbox.
1. Open the casing (see page 2-11).
2. Carefully prise open the motor loom retain clip and then disconnect the motor loom
connector (PL4) from the distribution board.
3. Remove the leadscrew assembly (see page 5-6). The motor and gearbox
assembly is attached to the right hand end of the leadscrew assembly and therefore
will be removed with the leadscrew assembly.
4. Detach the faulty motor and gearbox assembly from the leadscrew assembly by
pulling the two assemblies apart.
5. Fit the new motor and gearbox assembly by reversing steps (2) to (4) detailed above
and then assemble the casing (see page 2-11).
6. Carry out the occlusion thrust checks (see page 2-13) and also the plunger clamp
checks (see page 6-3).
7. Complete the relevant tests detailed in Section 6.
Motor and
gearbox
assembly
renewal
The occlusion clutch and disc assembly is situated on the left hand side of leadscrew
assembly underneath the status sensor board.
1. Open the casing (see page 2-11).
2. Remove the status sensors board (see page 5-5).
3. Remove the leadscrew assembly (see page 5-6). The motor and gearbox
assembly is attached to the right hand end of the leadscrew assembly and will,
therefore, be removed with the leadscrew assembly.
4. Remove and retain the two screws and the bracket that holds the clutch and disc
assembly in place.
5. Remove the faulty clutch and disc assembly.
6. Fit a new clutch and disc assembly by reversing the steps (2) to (4) detailed above
and then assemble the casing (see page 2-11).
7. Carry out the relevant tests in Section 6, including the occlusion thrust checks (see
page 2-13) and also the plunger clamp checks (see page 6-3).
Occlusion
clutch and
disc assembly
renewal