Smiths Graseby MS16A, Technical & Service Manual

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Te c h n i c a l Ser vice Manual I s s u e 6 ( February 2 0 0 5 ) 4 — 5
S m i t h s M e d i c a l
4
M S 1 6 A S y r i n g e D r i v e r
Removal and dismantling procedures
1. Case separation
a. Lay the driver face down on a clean flat surface.
b. Slide off the battery cover (item 27) and if fitted, remove the
battery.
c. Remove the three screws and washer securing the halves of the
case assembly. Lift off the rear half.
d. If the case is sealed, gently pry the two halves apart. Remove any
sealant from mating surfaces.
2. Leadscrew and bearing assembly removal
a. Separate the case halves as above.
b. Loosen the motor clamp (item 13) so that the motor and gearbox
assembly (item 14) can be tilted clear of the case.
c. Gently pull the leadscrew and actuator assembly (items 15 and
16) from the motor and gearbox assembly.
3. Actuator and back bearing disassembly
a. Separate the case halves and remove the leadscrew and bearing
assembly as above.
b. Remove the back bearing (item 20) from the end of the leadscrew.
c. Depress the plunger (half nut - item 18) on the actuator assembly
(item 19) and slide the actuator off the leadscrew at the back
bearing end.
When the half nut and spring are freed from the leadscrew,
ensure that they are not mislaid. Ensure that the half nut is blue-
rimmed.
4. PCB removal
a. Separate the case halves and remove the leadscrew and bearing
assembly as above.
b. Remove the motor clamp (item 13), screw and fibre washer.
c. Remove the four remaining screws and fibre washers securing
the PCB assembly (item 22) to the front case (item 2).
If the wires for the piezo-transducer assembly (item 25) are
secured with an adhesive pad to the motor clamp (item 13),
carefully lift the leads from the pad.
d. Pull the battery connector springs from their locating slots and
lift out the PCB assembly and motor and gearbox assembly.
SM0105-4-6.PMD 2/23/2005, 2:56 PM 5