User's Manual

310543 9
Service
AMV Reassembly
This procedure describes how to reassemble the
automatic metering valve. Refer to Parts information
on pages 13 and 14.
NOTES:
 The numbers in parentheses in the text refer to
reference numbers in the parts drawings and parts
lists.
 Repair Kit C02023 is available for AMV Part Nos.
C02021, C02022, and C02025. For the best re-
sults, use all the new parts in the kit when repairing
the AMV. Parts included in the kit are marked with
an asterisk, for example (11*). See page 13.
 Repair Kit C02080 is available for AMV Part No.
C02078. For the best results, use all the new parts
in the kit when repairing the AMV. Parts included in
the kit are marked with a symbol, for example
(11). See page 14.
 Needle Chuck Tool 918482 is available. Order
separately. See page 17.
 Clean all the parts thoroughly before reassembling
the AMV. Check them carefully for damage or
wear, replacing parts as needed.
 Prior to installation, lubricate all seals and o-rings
with PARKER-O-LUBE or an equivalent lubricant.
Check with the material supplier for a compatible
lubricant.
To reassemble the AMV, perform the following proce-
dure:
1. Install the o-rings (17*, 16*, and 14*) and the
back-up ring (22*) on the fluid piston (6a).
Stand the body (1) on the retainer end. Press the
fluid piston into the body using a dowel.
2. Reassemble the needle valve (6) and air piston
(4) as follows:
a. Attach the needle chuck to the needle (6b) and
insert the needle through the fluid piston (6a),
threaded end first.
b. Install the quad ring (20*) on the air piston (4)
by carefully stretching the quad ring into the
groove in the piston. On AMV C02078 only,
install the second quad ring (21) on the
piston.
3. Install the spring (23, not present on AMV C02078)
and the air piston (4) into the body (1).
4. Press the piston firmly into the body so the threads
appear. Install the o-ring (13*), washer (10), and
nut (11*).
5. Install the o-ring (19*) into the groove inside the
air cap (3), and reinstall the cap onto the body (1).
Remove the needle chuck.
6. Install the o-ring (17*) and reassemble the retain-
er (2) as follows:
a. Place the retainer (2) on a flat surface with the
threaded end down. Press the needle seal
(6c) into the cavity using a 1/4 in (6 mm)
dowel. Install the o-ring (15*) and support
washer (9).
b. Install the retaining ring (12*) with a retaining
ring compression tool.
7. Thread the retainer (2) into the body (1).
8. Turn the nut (8) clockwise to install and lock the
retainer (2).
9. Reinstall the stop screw (7).
10. Reinstall the nozzle in the retainer (2).
11. Reinstall the AMV on its mounting fixture.
12. Reconnect the air and fluid hoses.
13. Turn on the air pressure and apply power to the
fluid supply system.
14. Return the AMV to normal operating condition.