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2.
Loosen a fitting and drain the oil from the
reservoir into a clean container for re-use
after re-assembly. Note position of closing
speed control valve.
between the valve cover and reservoir.
Remove the reservoir mounting bolts (24A)
and the reservoir (24).
3.
Mark the position of the adjusting stem (26)
or measure its height above the top of the
spring chamber (22).
4.
Loosen the adjusting stem lock nut (25) and
turn the adjusting stem counterclockwise to
de-compress the spring until all tension is
removed. Re-tighten the stem lock nut (25).
5.
Mark the cover (2) and body (1) to ensure
proper alignment during re-assembly.
6.
Place a strap/sling around the adjusting stem
(26) near the top of the spring chamber (22)
and around the cover (2) and simultaneously
support both with overhead lifting.
7.
Remove the cover bolts (29) and carefully
extract the cover (2) from the body (1). All
the remaining components except the body
seat (6) will come out with the cover.
8.
Move the cover assembly to a convenient
work area and support on blocks so the
spring chamber is vertical to facilitate further
disassembly.
9.
Remove the spring chamber bolts (28) and
lift off the spring chamber (22), spring (23)
and spring guide (27).
10. Using a chain/strap wrench, grasp the disc
(3) around its outside diameter, loosen and
remove the disc stem nut (7A). DO NOT
GRASP THE STEM (7) as any scoring will
damage the rod wiper (21).
11. Remove the disc stem washer (7C), piston
follower (15), the piston ID seal (16) and the
piston (12).
12. Remove the gland screws (11A) and gland
(11).
13. Extract the stem/disc assembly from the
cover.
14. Remove the disc seat ring screws (9), disc
seat ring follower (5) and disc seat ring (4).
15. Remove the two stem seals (19), lantern ring
(10) and rod wiper (21).
16. Typically, the piston bushing (14), upper
bushing (8) and lower bushing (8A) do not
need to be removed as the associated seals
can be replaced without removing these
components.
17. Inspect all parts for wear and damage.
Replace worn and/or damaged parts.
ASSEMBLY
The
valve
is
reassembled
disassembly sequence with consideration of the
following:
1a. Clean and polish all machined bearing and
sealing surfaces. Remove burrs and sharp
Remove the tubing
by
reversing
the
3
edges. Apply a light coat of lubricant to
assist in the assembly.
2a. Make sure the hole in the piston follower (15)
aligns with the pipe plug in the top of the
piston (12).
3a After the spring (23), spring guide (27) and
spring chamber bolts (28) have been re-
assembled,
turn
clockwise until the spring (22) is slightly
compressed to stabilize it during final
assembly.
4a. Due to the angle at which it is installed, be
especially careful when inserting the cover
assembly into the body to make sure the
cover seal (20) is not damaged.
8a. Loosen the stem lock nut (25).
adjusting stem (27) clockwise until it is at
original position, tighten adjusting stem lock
nut (25).
9a. Install reservoir (24) and re-connect control
piping.
Threaded connections should be
sealed with oil-compatible pipe sealant, not
Teflon tape. Open speed control valve fully
and slowly add oil to reservoir until it is ¾
full.
If additional oil is needed, use AW32
hydraulic fluid.
10a. Reset closing speed control to original
position. Tighten locknut.
REPLACEMENT PARTS
Genuine replacement parts are available from your
local VAG/GA Industries representative or from the
factory:
VAG USA, LLC
234 Clay Avenue
Mars, PA 16046 USA
Telephone: 724-776-1020
Fax: 724-776-1254
E-mail:
quotes-ga@vag-usa.com
Please have the nameplate data available when
ordering parts. Identify needed part(s) by Shop Order
(SO) Number, Figure Number, valve size and
individual part number.
REPAIR KITS
Soft Goods Kit includes Items 4, 12A, 13A, 14A, 16,
17, 18, 19, 20, 21, 33 and 35
Size
Kit Number
10"
K10
12"
K12
14"
K14
16"
K16
All other parts ordered individually. Consult factory
for larger sizes.
WARRANTY:
The Warranty for GA Industries valves is included in
our Terms and Conditions which can be found here:
https://gaindustries.com/terms
adjusting
stem
(26)
Turn
Part Number
2-80-25000-436
2-80-25000-437
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