A705-61-880 Issue M
Page 28 © Edwards Limited 2012. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Maintenance
Use Edwards maintenance and service kits (refer to Section 7.3). These contain all of the necessary seals, grease and
other components necessary to complete maintenance successfully.
5.3 Check the gearbox oil-level and fill the gearbox with oil
(if necessary)
Table 12 - Maintenance plan
Operation Frequency Refer to Section
Check the gearbox oil level and fill the
gearbox with oil (if necessary)
Weekly 5.3
Inspect the gas-ballast system Monthly 5.4
Inspect the pipelines and connections 3 Monthly 5.5
Inspect the interstage relief valve and replace
the hinge bushes, flap and ‘O’ ring
(if necessary)
Yearly or when necessary 5.6
Change the gearbox oil and clean the oil-level
sight-glass
*†
*
You must have a Routine Maintenance Kit to do these maintenance operations.
†
For maximum pump reliability, we recommend that you change the gearbox oil when you relubricate the
high vacuum bearings: refer to Section 5.8.
When you relubricate the high vacuum
bearings or when contaminated
‡
,
whichever occurs first
‡
If the gearbox oil is contaminated (indicated by a change in colour of the oil, for example, water
contamination will turn the oil a white colour), you must change the oil. You may be able to remove the
contaminants from the oil by filtration.
5.7
Relubricate the high vacuum bearings
*
When necessary
**
**
The frequency of maintenance depends on the operating temperature of the pump: refer to Section 5.8.
5.8
Clean the cooling-jacket
*
Yearly or when necessary 5.9
Replace the interstage relief valve When necessary 5.10
Replace the pump-motor
††
††
You must have a new pump-motor and a Motor Fitment Kit to do this maintenance operation.
When necessary 5.11
Replace the coupling insert
‡‡
‡‡
You will need a Motor Fitment Kit to do this maintenance operation.
Yearly 5.12
Relubricate the motor bearings When necessary
***
***
See Section 5.13.
5.13
Replace the motor bearings
†††
†††
You will need a Motor Bearing Kit to replace the motor bearings.
When necessary 5.14
Overhaul the pump 3 Yearly 5.15
The pressure in the gearbox will be equal to the pressure of your shaft-seals purge gas supply.
Loosen the oil filler-plug and wait for two or three seconds for the pressure in the gearbox to
equalise before you remove the oil filler-plug or oil drain plug. If you do not, oil may be ejected
under pressure from the gearbox.
Particular caution should be exercised when working with Fomblin oil that may have been exposed
to temperatures above 260 °C. Refer to the Edwards Materials Data Sheets for detailed
information.
To Next Page
Loading...
Need help?
General
