Smiths Graseby 3200, Техническое и сервисное руководство

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Smiths Medical International Ltd.
3200 Service Manual
Issue 5 (August 2004) 5 — 6
Repair procedures
The plunger clamp and super nut assembly is held in place (in the rear casing) by two guide
tubes.
1. Open the casing (see page 2-11).
2. Remove and retain the screw that holds the distribution board tray in place.
3. Remove the narrow spring from the size sensor lever arm.
4. Remove the left and right hand brackets that hold the square lay shaft in place.
5. Displace the square shaft together with the super nut and flag moulding, and remove
the entire faulty assembly by lifting the guide tube off its two seatings.
6. Fit the new assembly by reversing steps (2) to (5) given above and then close the
casing (see page 2-11).
Plunger clamp
and super nut
assembly
renewal
1. Remove and retain the two screws that are inserted into the stainless steel bracket
on the base of the pump.
2. Remove the faulty pole clamp.
3. Fit the new pole clamp to the pump by placing and tightening the two screws into
the bracket.
Pole clamp
assembly
renewal
The leadscrew assembly is held in the rear casing by two bearing clamp plates. It is also
kept under tension by a strong adjustable spring. The keyed coupling bush that screws into
the right hand end of the lead screw has a ‘left hand’ thread
1
.
1. Open the casing (see page 2-11).
2. If necessary run the motor on its batteries in order to reveal the small grub screw
situated in the occlusion adjusting nut on the right hand side of the leadscrew.
Using a 1.5 mm hexagon key loosen the grub screw.
3. Ensuring that the leadscrew does not turn, move the occlusion adjusting nut
counter-clockwise (i.e. towards the left) in order to relax the spring tension.
4. Remove and retain the two pan head self tapping screws holding the right hand
bearing clamp plate in place; remove and retain the plate.
5. Lift out the leadscrew, together with the motor and gear box. The motor and gear
box are coupled at the right hand end of the leadscrew.
6. Uncouple the faulty leadscrew from the motor by pulling it away from the motor
shaft.
7. Fit a new leadscrew assembly (see Note below) by reversing steps (2) to (6). Tighten
the grubscrew to a torque of 15 ± 2 cNm. Alternatively, renew the motor and gear
box assembly as detailed in the following section.
Note:
During the fitting of the new leadscrew the spring assembly may have to be
compressed to the left in order to fit it into the appropriate grooves in the rear casing.
8. Ensure that the groove on the syringe size sensor collar (through which the larger
telescopic tube slides) fits correctly into the concaved rear casing.
9. Assemble the casing (see page 2-11).
10. 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).
1
If the l.h. thread coupling bush is removed, the torque required when refitted must not
exceed 40 cNm.
Leadscrew
assembly
renewal