APV W+10/8 - Page 13

GB
Form no.: L453147GB– revision 06/2013
7. Service and maintenance
10. ChecktheO-ringsforsignsofstiffness,lackofelasticity,brittleness
and/orchemicalcorrosion.Replacewornordamagedparts.
11. Checkthestationaryring(item5.6)androtaryring(item5.7)for
signsofwear.Wearsurfacesmustbecompletelyfreeofcracks.If
thisisnotthecase,boththestationaryringandtherotaryringmust
bereplaced.
11aInthecaseofwater-ushedshaftsealsandasepticshaftseals,
checktherearsealrings(item5.6,5.7)forwear,andreplaceif
necessary.
12. Fitthenewo-ringsonthestationarysealfaceandrotarysealface.
Caution! Remember to moisten these with water.
13. Fittherotarysealfaceontheimpellerwithoutusingtools.
Note! Thenotchintherotarysealfacemustbeinstalled
sothatittswiththedrivingpin(item5.8)inthe
impeller hub.
13aInthecaseofdoublemechanicalshaftseals,alsotarotaryseal
face(item5.7)witho-ring(item5.5)inthelocationontheshaft–
again without using tools.
14. Fitthestationarysealfaceinthebackplatewithoutusingtools.
Note! Installthestationarysealfacesothatittswith
thepininthebackplate.Checkthatthestationary
sealfaceispositionedsothatitslidesbackand
fortheasilywithinthebackplate.
14aWhenttingnewdoublemechanicalshaftseals,removethedrain
pipe(item5.4)beforettingtheminthepressurering(item5.9)or
backplate(item7a,7b).
* The W+50/600 pump is not equipped with a drain pipe.
15. Aftertting,cleanthesurfacessubjecttowear.
15aFordoublemechanicalshaftseals,re-mountthebackplate
(item7a,7b).
16. Fittheimpeller(item4).Remembertousethepropertightening
torque.
M10: 45Nm(33ft-lb)
M14: 70Nm(52ft-lb)
M20: 200Nm(148ft-lb)
17. Checkthatthelocatingpin(item8)inthetopofthebackplatets
with the detent in the pump body. To prevent damage to the O-ring,
carefullypressthepumpbody(item1a,1b)insothatitcoversthe
O-ring(item6).Thenfastentheclampring(item9).
Remember to use the proper tightening torque:
M10: max.35Nm(25ft-lb)
Checking parts for wear
Fitting
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APV