A344-02-880 Issue J
Page ii © Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Contents
5Maintenance .....................................................................................25
5.1 Safety .....................................................................................................................25
5.2 Maintenance plan .......................................................................................................26
5.3 Check the oil-level .....................................................................................................27
5.4 Replace the oil ..........................................................................................................27
5.5 Replace the fine oil-filter .............................................................................................28
5.6 Replace the gas-ballast filter .........................................................................................29
5.7 Inspect and clean the inlet-filter .....................................................................................30
5.8 Clean the oil-level sight-glass .........................................................................................31
5.9 Clean the motor fan-cover ............................................................................................32
5.10 Clean and overhaul the pump .........................................................................................32
5.11 Test the motor condition ..............................................................................................32
5.12 Fit new blades ...........................................................................................................32
5.13 Basic fault-finding ......................................................................................................33
5.13.1 The pump has failed to start ..........................................................................................33
5.13.2 The pump fails to achieve its specified performance .............................................................33
5.13.3 The pump is noisy ....................................................................................................... 34
5.13.4 The pump is too hot ....................................................................................................34
5.13.5 The vacuum is not fully maintained after the pump is switched off ...........................................34
5.13.6 The pumping speed is poor ............................................................................................34
5.13.7 There is an external oil leak ..........................................................................................35
6Storage and disposal ...........................................................................37
6.1 Storage ...................................................................................................................37
6.2 Disposal ...................................................................................................................37
7Spares and accessories .........................................................................39
7.1 Introduction .............................................................................................................39
7.2 Service ....................................................................................................................39
7.3 Spares ..................................................................................................................... 40
7.4 Accessories ...............................................................................................................40
7.4.1 Inlet dust-filter ..........................................................................................................40
7.4.2 Inlet catchpot ........................................................................................................... 41
7.4.3 High-capacity inlet dust-filter ........................................................................................41
7.4.4 Inlet chemical-trap .....................................................................................................41
7.4.5 Outlet catchpot .........................................................................................................41
7.4.6 Outlet mist-filter (clean applications) ..............................................................................42
7.4.7 Outlet mist-filter (toxic applications) ...............................................................................42
7.4.8 External oil filter .......................................................................................................42
7.4.9 Oil-level monitor ........................................................................................................43
7.4.10 Solenoid-operated gas-ballast control valve .......................................................................43
7.4.11 Vibration isolators ......................................................................................................44
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