How To Use The Clean And Overhaul Kit - Edwards E2M28 Instruction Manual

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How to use the clean and overhaul kit

The mass of the pump is 44 kg; Use suitable lifting equipment to move the pump. If you do not,
you can injure yourself or damage the pump.
Never mix hydrocarbon and PFPE lubricants.
Never use hydrocarbon lubricants in a PFPE-prepared pump.
Where appropriate, refer to the instruction manual for information about routine maintenance of the pump.
1. Disconnect the rotary pump from the electrical supply and allow it to cool.
2. Drain the oil from the rotary pump. Unscrew the bolts which secure the oil box and remove the oil box.
For PFPE (Fomblin) prepared pumps take additional care if you suspect that the pump (and hence the PFPE
oil) has overheated.
Do not touch or inhale the thermal breakdown products of PFPE oil, which may be present, if the pump has
been heated to 260 °C and above. PFPE oils are safe in normal use but can decompose into very dangerous
substances if they are heated to 260 °C and above. The pump may have overheated if it was misused, if it
malfunctioned, or if it was in a fire. Material Safety Data Sheets for PFPE oil used in the pump are available
on request: contact your supplier or Edwards.
3. Remove any debris from inside the oil box. Clean all surfaces with a suitable cleaning fluid.
4. Dismantle the rotary pump and, referring to
the Clean and Overhaul Kit. Clean all exposed surfaces encountered during a service with a suitable cleaning
fluid.
Dispose of any components removed from the pump and any contaminated cleaning materials safely and in
accordance with all local and national safety and environmental requirements.
Particular care must be taken with components and waste oil, which have been contaminated with dangerous
process substances.
Do not incinerate fluoroelastomer seals and O-rings.
5. Inspect the rotary pump blade assembly for signs of wear. Ensure there is less than 0.15 mm clearance between
each blade and its rotor slot: if the clearance is greater than 0.15 mm, you must replace the blades if you wish
to obtain good vacuum performance. Refer to
6. Re-fit the oil box to the pump. Use the new oil box O-ring from the kit. Fill the rotary pump oil box with the
correct quantity of new oil.
7. The kit contains a warning label (item 36). If this is not already in place, remove the backing strip from the
label. Stick the label on the top of the oil box lid close to the exhaust outlet, see
8. Connect the electrical supply and switch on the rotary pump. Check that the oil level in the sight glass at the
end of the rotary pump drops by 3 to 5 mm when the pump is started. If this does not happen, refer to the rotary
pump instruction manual.
9. Open the gas ballast valve and run the rotary pump for at least one hour.
© Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
WARNING
CAUTION
Figure 1, 2 and 3, replace the relevant components with those in
Section 5 for instructions on the use of the Blade Kit.
A373-01-840 Issue J
Figure 2.
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