Oerlikon Leybold Vacuum Sogevac SV630 B Operating Instructions Manual page 34

Maintenance
Note
Caution
34 GA02319_002_03 - 07/2007 - © Oerlikon Leybold Vacuum
D. Replacing the exhaust filters and checking the by-pass
Tools required :
tubular box wrench 16 mm.
■
When the exhaust filter elements are clogged, the integrated by-pass
opens and the filters are bypassed. Oil mist at the exhaust, and/or high oil
consumption are signs that the exhaust filters are clogged.
The exhaust filters must be replaced more often if subjected to increased oil
cracking products at high operating temperatures and/or aggressive media.
Remove the cover (22) with gasket (106). Remove the exhaust deflector (162)
by unscrewing the bolt (9).
Remove both demister support units (165) by unscrewing the nuts (11).
The exhaust filters (167) can be removed individually.
Check also the float valve (172). See § 5.4 - H.
Plug new exhaust filters (167) into the oil casing (160).
Insert carefully the demister support units (165) over the new exhaust filters
(167) threaded bars (M6) and compress slightly the demister springs.
Tighten the demister support units (165) and the exhaust deflector (162). If
necessary mount a new seal (106) and mount the cover (22).
When disposing of used oil please observe the relevant environmental
regulations !
E. Cleaning the dirt trap
Tools required :
Open-jaw or box wrenches 10 mm, 17 mm.
■
A wire-mesh filter is located in the pump's intake port (43 or 67) to act as a
dirt trap for impurities. It should be kept clean at all times in order to avoid
reduction of the pumping capacity.
For this purpose, disconnect the intake line, remove the dirt trap from the
intake port and rinse it in a suitable vessel using a solvent. Then dry it with
compressed air. If the dirt trap is defective, replace it.
The cleaning intervals depend on requirements. If large amounts of abrasive
materials occur, a dust filter should be fitted into the intake line (see § 1.4).
Never mount used seals ; always mount new seals.