Solenoid Valve Seal Replacement - Compac CNG Installation And Service Manual

Servicing

Solenoid Valve Seal Replacement

Remove the Old Solenoid Valve
Seals
Compac Industries Ltd.
Before you start, make sure you have:
 A seal kit - Part number FC-SK-0001
 1 x teflon valve seal
 1 x solenoid top O-ring seal
 1 x gas return line O-ring seal
O-ring lubricant

 Solenoid piston - Part number FC-VLV-PSTN-0001 (optional)
 Solenoid top service kit - Part number FC-SVK-0001 (optional)
Never remove or service the stem. If it is leaking, it must be
returned to Compac for service.
When working on the open solenoid assembly, cover the
opening with a cloth to prevent dust and dirt from entering.
It is not necessary to remove the solenoid body from the
loading post to service the solenoid seals.
O-rings that are subjected to natural gas at high pressure swell
when exposed to air. Once swollen, they cannot be reused and must be
replaced.
1. De-gas the loading post (see page 23).
2. Switch off the power supply to the loading post.
Never remove any electrical components without first
switching off the power to the loading post. Failure to turn off the power
could result in an electric shock.
3. Unscrew the solenoid coil retaining nut and move the coil out of the way.
4. Remove the six M6 capscrews from the solenoid top.
Do not remove the angled grub screw from the solenoid
top. This is epoxied in place during manufacture and should never be
removed.
5. Remove the solenoid top and remove the old top O-ring seal and gas
return O-ring.
6. Remove the solenoid spring.
7. Screw one of the M6 cap screws into the solenoid piston to withdraw it
from the solenoid body.
Page 27
Solenoid Valve Seal Replacement
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