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DANIEL MODEL 788DVC DIGITAL CONTROL VALVES DEC 2012
TM
DISASSEMBLY AND REASSEMBLY 5-7
5.4.2 To upgrade existing valves having the original “AP” option (received prior to September
1992), the following parts have been supplied as a separate kit:
- washers (29)
- Stat-O-Seals (30)
- one gasket (31)
- three O-rings (replaces existing O-rings (3) and (4) of the same part numbers.)
Reference Figure 7-1 for complete valve part numbers.
5.4.3 To upgrade existing “AP” units supplied prior to September, 1992:
a. Follow procedures described in Section 5-1 for general disassembly and Section 5-2
for Aggressive Products Cylinder disassembly.
b. Replace O-rings and install gasket, Stat-O-Seal and washers as required (reference
Figure 7-1).
c. Complete cylinder assembly by installing piston and all component parts through the
top of the cylinder housing.
Do not attempt to install the piston through the seat area. Attempts to assemble through the
seat area will destroy the spring-loaded Teflon cup-seals.
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d. Secure cylinder assembly to cylinder heads using hand pressure or arbor press for
ease of installation.