Rebuild
3A0231F
27
Assembly
Clean all valve parts with an appropriate solvent prior to
reassembly. Always install new, lubricated o-rings and
seals when assembling the valve. Use Krytox 203GPL
(part number 84/0200-K3/11) for lubricating valve parts
including seals and o-rings. Check the Metering Rod
(11), Dispense Sleeve (14), and Sleeve Assembly (24)
for wear and if they are worn secure replacements
before proceeding.
Carefully install new U-cup and Posipak seals so that
they are not pinched or torn. Do this by making sure
they are lubricated, and by tucking the lips of the seal
inward before uniformly pushing them into position.
Install the Seal Plate Cups on the Main Body
1.
Install a lubricated O-ring (15) on the left side of the
Main Body (3) next to the sleeve part of the Spool
Assembly (24).
2.
Install two lubricated Posipak Seals (23) in the left
Seal Plate Cup (26) so that the O-ring side of both
Posipaks will be facing the Main Body (27). Be sure
to tuck the lip of the Posipak into its cavity to avoid
tearing it.
3.
Position the left Seal Cup Plate (26) with the oil cup
upwards and slide it over the Spool part of the Spool
Assembly (24) with the counterbore for the Seal
Retainer (22) facing out. Slide the Seal Retainer
(22) over the Spool and install two Screws (20).
4.
Repeat steps 3, 4 and 5 for the right side Seal Plate
Cups.
Build the Divorced Section and Mount to the Main
Body
5.
Place lubricated U-cup Seal (8) lip side up into the
Divorced Section (10). Place the Washer (7) over it,
and reinstall the Retaining Ring (6).
6.
Lubricate and insert the Metering Rod (11) into the
Divorced Section (10) from the bottom and push up
carefully through the U-cup seal (8).
7.
Install the Seal Cup (12) into the Divorced Section
(10) over the Metering Rod (11) and slide the lubri-
cated Posipak Seal (13) over the Metering Rod
keeping the O-ring side of the Posipak facing down.
The ends of the Metering Rod (11) should be pro-
jecting from the upper and lower ends of the
Divorced Section.
8.
Lubricate the dispense sleeve bore in the Main
Body (27). Insert the Dispense Sleeve (14) into the
Main Body (27). Check for threads that may be in
the inside of the sleeve due to tapping during
removal and make sure these are at the top.
9.
Install a lubricated O-ring (15) around the Dispense
Sleeve (14).
10. Holding the Divorced Section (10) and using the
projecting Metering Rod (11) as a guide slide the
Metering Rod (11) into the Dispense Sleeve (14)
and install the Divorced Section (10) against the
Main Body (27). Install the Screws (16).
Mount the Valve End Caps to the Seal Plate Cups
11. Install a lubricated U-cup Seal (4) onto the left Spool
Shift Piston (21) with lip side out as shown. Lubri-
cate the bore in the End Cap (19). Slide the piston
into the left End Cap (19) tucking the lip of the seal
into the End Cap carefully.
12. Install the Piston/End Cap onto the left Seal Plate
Cup (26) using four Screws (18). Tighten the screws
in a cross pattern gradually to prevent binding due
to misalignment (like you would tighten lug nuts on a
car tire).
13. Push the Spool into the left side until it contacts the
piston.
14. Repeat steps 13 and 14 for the right side.
Install the Drive Cylinder
15. Install lubricated O-ring (5) on top of the Divorced
Section (10).
16. Install two lubricated U-cup Seals (4) onto the Dis-
pense Piston (3) with the upper seal lip up and the
lower seal lip down as shown.
17. Lubricate the bore of the Drive Cylinder End Cap
Assembly (2) and insert the Dispense Piston (3)
flush with the end of it, tucking the lip of the upper
U-cup Seal (4) so that it is not damaged.
