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5.3
Check points at Intermediate Service
5
Service instructions
5.3.8
Threads on bowl hood and bowl
body
Excessive wear or impact marks on threads and
guide surfaces of the bowl hood or bowl body
can cause seizure damage.
Examine the thread condition by tightening the
bowl hood after removing the disc stack and top
disc from the bowl.
When the bowl is new the alignment marks
on the bowl hood and the bowl body should
be aligned. If not, contact an Alfa Laval
representative.
G0071311
Wear
If thread wear is observed, mark the bowl body
at the new position by punching a new alignment
mark. If the mark on the bowl hood passes the
mark on the bowl body by more than 25×, (A
in the illustration) an Alfa Laval representative
should be contacted immediately.
The measure A in millimeters (mm) is obtained
by calculating bowl outside diameter D times
0,2.
If the marks are illegible, an Alfa Laval
representative should be contacted for
determination and punching of new alignment
marks.
!
WARN
ING
Disintegration hazards
Wear on threads must not exceed safety limit. f mark
on bowl hood must not pass f mark on bowl body by
more than 25°.
D
A
(MAX 25 )
G0578111
46
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