Machinery World Tetra Centri A 614HGV-14C, Service & Maintenance

Page: 104 / 278

4.6 Separator bowl
4 Dismantling/Assembly
4.6.7 Check point - Limit for
thread wear
Wear - Threads of large lock ring
and bowl body
• The purpose of the lock rings (A) is to keep
the bowl hood (B) securely in position against
the bowl body (C) during operation. No play is
permissible here. The threads (D) on the lock
ring joint must not be worn to such an extent
that the security of the lock ring joint is
jeopardized.
Excessive wear of these threads may involve
risk of personal injury or damage of the
equipment.
NOTE
By using the hydraulic disc compressing tool,
thread wear is reduced to a minimum.
1. When the bowl is new the 0-marks (see
arrow) on bowl hood and lock ring are
positioned exactly against each other. After
some time, due to thread wear, these marks
will pass each other when the lock ring is
properly tightened.
2. To check the thread wear, the threads of lock
ring and bowl body must be properly cleaned
and lubricated first. Remove the disc stack
(E) and tighten the lock ring with a few blows
of a lead hammer until it is fully tightened.
The position of the lock ring relative to the
bowl body and hood has now been
establiished.
If the 0-marks are exactly aligned with each
other, proceed to the chapter “4.6.8 Check
point - Disc stack pressure” on page 106.
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