Instruction Manual
D101550X012
8532 Valve
June 2017
19
8. Before removing the upper shaft (key 3), be sure the valve disk is properly supported. Pull out the upper shaft
(key 3) by hand‐pulling or by using a shaft extractor screwed into the end of the shaft.
CAUTION
To avoid damage to the disk, seal, and T‐slot area, do not force the disk past the seal or T‐slot area. Remove the disk from
the opposite side of the valve body.
Note
Both the upper shaft and the lower shaft have a thrust bearing (key 24) between the disk and the bearings (key 7). The thrust
bearing is located outside of the bearing bore which holds the bearings. Use care when removing the valve disk to avoid loss of or
damage to the thrust bearings.
9. After removing the shaft(s), remove the disk. Do not force the disk past the seal or T‐slot area. Collect the thrust
bearings.
10. Remove the bearings (key 7). Using a suitable punch or puller, drive or pull the bearings into the valve body bore
from the upper shaft bearing bore. Remove the bearing from the lower shaft bearing bore.
11. Inspect the valve body bore, bearings, bearing bores, and packing box for damage.
Note
In these instructions, the drive shaft (with splined end) is called the upper shaft (key 3). The shaft opposite the upper shaft is called
the lower (follower) shaft (key 4).
Installing the Two‐Piece Shaft
Key numbers in this procedure are shown in figures 9 and 10 unless otherwise indicated.
WARNING
Avoid personal injury or property damage caused by the impact of a falling or tipping of a large valve. Support large valves
during maintenance.
1. Properly secure the valve on a suitable worktable so it cannot slip, twist, or fall during maintenance. Be prepared to
support the valve disk.
Note
Replacement disk and shafts are provided as a matched set and both should be replaced at the same time.
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