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Install the thrust washer (item 12) onto the valve stem (item 2).
TIP:
Apply a thin layer of grease (such as Panef Petrolatum) to smooth
section of the stem (item 2).
Figure 4-16 Install Washer
Insert the valve stem (item 2) through the shaft bore from inside the valve
body (item 4).
Figure 4-17 Install Stem
Install the five (5) packing rings onto
the valve stem, pushing them into
the shaft bore.
CAUTION: Packing-Ring
Order.
There are three (3) types
of Teflon rings that comprise the
valve-stem packing [five (5) rings
total]. Do not alter their
arrangement or improper sealing
will result.
TIP:
Apply a thin layer of grease
to the interior diameter of the
packing rings (item 5).
Figure 4-18 Note Packing Rings Orientation and Install Onto Valve Stem
Insert the spacer (item 6) collar into the stem (item 2) bore. It will protrude
about 1/4” when seated. This is normal.
TIP:
Apply a thin layer of grease to the interior diamter of the spacer (item
6).
Figure 4-19 Install Spacer
2
12
2
4
6
4
2
5
2
A-520/A-522/A-522A
, Rev. 3.0