SES 2000 Vac (LS3) AUTOCLAVE Part 3
ST-SM45g Page 29 of 53
PART 3 MAINTENANCE
b Remove washer and plastic ‘shouldered washer’
from the outside of the chamber and the sensor,
insulation bush and silicone bush (noting orientation
of all components) from inside the chamber.
c Clean internal chamber seating and refit new
components (sensor, insulation bush, silicone bush
and shouldered washer) by the reverse of above.
Manual reset cut-out (Fig.2.4, item 21 & 25)
36 To remove and replace the Manual reset overheat
cut-out switch and attached bulb proceed as follows:
a Ensure mains power is removed from the unit,
remove cover and remove two spade connectors
from the switch noting the terminals each was
connected to.
b Release switch from the mounting panel by removing
two retaining screws.
c Free the bulb inside chamber by releasing the clamp
around bulb and heater element.
d Remove capillary tube and bulb through chamber
wall by undoing the tubes captive nut from the end
of the thermal clamp.
e Release capillary tubing from all constraints noting
the path taken.
f Replace new switch and bulb by reversing the above
and noting the following :
(i) Apply PTFE tape around the captive nut on the
tube before fitting and allow the tube to turn whilst
tightening. DO NOT OVER TIGHTEN.
(ii) Reposition clamp and bulb approximately 50mm
in from the back of the chamber around the right leg
of the element. Lay the bulb into the clamp alongside
the element and fold the clamp legs over to trap the
bulb with a large pair of pliers.
(iii) Ensure the bulb is held tight in the clamp and that
the tube is routed away from the water level sensor
and not touching it.
g Test new switch and bulb and perform a leak test
(para.55 onwards).
Reservoir Water filter
37 To remove and replace the water filter proceed as
follows:
a Remove the reservoir lid and carefully pull the
flexible tubing and filter up and out through the
reservoir top without disconnecting the tube from
the top elbow.
b Whilst gripping the tube pull off the old filter and
replace with new filter (Part No.424261) by pushing
it onto the tube.
c Reposition tube and filter back inside the reservoir
ensuring the tube is not kinked and the filter is
positioned inside the condensing coil.
Vacuum pump maintenance
38 Pump maintenance depends on the type of vacuum
pump fitted. Autoclaves with the piston pump shown in
Fig. 3.6 should have this changed (if problems with it are
encountered) to the diaphram type. The piston pump is no
longer available and a kit (part number 111372) should be
obtained. This kit includes all the parts and information
required to replace and fit a diaphram pump. Autoclaves
with the diaphragm pump (as shown in Fig. 2.3) can be
refurbished as detailed in the following section.
Diaphragm vacuum pump (as shown in Fig. 2.3)
Maintenance of the diaphragm vacuum pump entails the
replacement of the Diaphragm, Valves and ‘O’ ring in both
heads (Part No.759584) , proceed as follows:
a Disconnect the two pipes (one on each head, items
9 and 16 of Figure in Parts List 2) at the olives,
leaving the interconnecting pipe between heads
attached.
b Remove the head bolts and lift off the head assemblies
together. (If head removal is difficult, side blows
from a soft headed mallet may be required, to assist
separation ).
c Remove diaphragm retainer plate screws and lift off
retainer plates, remove diaphragms and discard.
d Place new diaphragms on con-rod tops, replace
retainer plate and screws using Loctite 242 (Part
No.306039) on threads and torque to 2.5Nm.
e Remove valve plate from the head assembly and
discard valves and ‘O’ ring.
f Fit new valves and ‘O’ rings, replace valve plate and
screws using Loctite 242 and torque to 2Nm.
g Position one of the diaphragms at the mid stroke
position and ensure that the diaphragm is seated
correctly.
h Replace the head and head bolts and torque in a cross
pattern to 3Nm re-torque the first bolt to each head.
i Reassemble the autoclave and test. If an abnormal
noise is heard, obtain assistance from the Eschmann
After Sales Service Department (details inside front
cover).
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