Flowserve V-377 R4 Edward Valves - Manual (Page 21)

Flow Control Division
Edward Valves
Disassembly Procedures for Impactor Handles & Handwheels
(continued)
BEARING NUT
BALL BEARING
GEAR COVER ASSEMBLY
(VALVE YOKE)
CROSSARM
(VALVE YOKE BUSHING)
(VALVE YOKE BEARING)
SHOWN WITH
IMPACTOGEAR
IMPACTOR
HANDWHEEL
LOCKING
SCREWS
KEY
Ball Bearing Impactor Handwheels
(With or without Impactogears)
All have 28, 36, 48 or 72” diameters. See
Illustration No. 13 on this page.
These impactor handwheels differ in diam-
eter and design from the non-bearing type
in that the handwheel turns on ball bear-
ings. The following instructions apply to all
sizes.
1. Remove the cover plate screws and
the cover plate.
2. Back off all of the locking screws.
3. Mark the relative position of the
handwheel and crossarm so the origi-
nal relationship can be restored when
reassembling. If this is not done, the
handwheel could be reassembled
180° out of the original position.
4. Provide a suitable capacity chain
hoist, at least 1500 lb., to remove
the handwheel. If the stem of the
valve is mounted vertically, position
the hoist directly above the hand-
wheel. Otherwise the hoist should be
placed slightly away from the hand-
wheel in line with the stem.
a. The handwheel bearing nut and
handwheel are removed as an
assembly.
b. Unscrew the handwheel bearing
nut using a tool to engage the two
drive holes in the top of the nut or
a strap wrench on the O.D. To
prevent the yoke bushing from
turning, hold it with a strap
wrench or other suitable tool.
c. Begin with all slack out of the
hoist, and retain a taut chain by
simultaneously taking up the slack
as the handwheel bearing nut is
fully unscrewed and lifted off the
valve.
5. Crossarm Removal: For all valves
being serviced in Area I or revolving
stem valves in Area 2, the crossarm
can be removed by tapping lightly
with a hammer on the underside until
it is free of the key(s).
6. If malfunction is indicated within the
handwheel bearing, the balls can be
removed by unscrewing the filler hole
set screw, tipping the handwheel so
the hole is down, and ‘fishing’ out
the individual balls. Need for this
should be rare, if ever.
Illustration No. 13
Impactor Handwheel Ball Bearing Type (w/Impactogear) 21