4.5 - GREEN MACHINE
™
- North America - Installation, Operation, Maintenance, & Troubleshooting Manual
Chapter 7: Maintenance Procedures
Page 110
7.6.1
Removing the Valve Solenoid and Core Assembly
See Figure 7-14.
Figure 7-14: Vale Solenoid Assembly
1. Turn OFF power to the VST Control Panel at the
Power Switch located on the front of the VST
Control Panel. (The power, ground, and neutral
will be completely disconnected from the
GREEN MACHINE).
2. Follow lockout & tagout procedures prior to
starting work.
3. Unlock the hasps and remove the cover from
the GREEN MACHINE.
4. Unlock and close the three ball valves between
the GREEN MACHINE and the vent risers.
NOTE:
The Liquid Tight conduit or fitting do not have
to be removed from the solenoid.
See Figure 7-13.
5. Remove the red cap from the solenoid that is
not working.
6. Remove the nameplate by pushing the solenoid
down towards the valve body, then lift and slide
the nameplate off.
7. Slide the solenoid off the solenoid base. DO
NOT lose the spring washer located below the
solenoid on the solenoid base.
8.
Using a ¾” wrench, remove the solenoid base
from the valve body, the core assembly with
core spring, and the body gasket.
9. Inspect and clean the following parts with a rag
and carburetor cleaner or an equivalent
cleaning solution:
Be sure to use eyes and
hands protection.
10. Check to make sure the copper ring in the
bottom of the solenoid base is not missing
or broken into pieces.
See Figure 7‐1
5.
11. Clean the core assembly, including the metal
plunger, the spring, and the rubber seal.
12. Check the rubber seal on the bottom of the core assembly for distortion.
Distortion would indicate an indention into the rubber from the valve seat.
13. Check to see if the spring is cracked or broken.
14. Inspect the body gasket in the valve base for damage and wear.
15. If there is any damage, broken parts, or excessive wear on any part of a control valves
assembly, VST recommends that all five control valves be replaced.
Figure 7-15: Solenoid Base Interior
