Alfa Laval MMPX 303SGP-11, Manual

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5.3 Check points at Intermediate Service 5 Service Instructions
60
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.
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 millimetres (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.
DANGER
Disintegration hazards
Wear on threads must not exceed safety
limit.
φ
mark on bowl hood must not pass
φ
mark on bowl body by more than 25
°
.
G
0
07
13
1
1
D
A
(MAX 25 )
G
0
57
81
1
1
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