Toro 41564 - Page 54

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1. Valve wont open
2. Valve wont shut off
3. Leakage around
coil or around lower
diaphragm piston.
4. Blowing fuses
5. Valve operating
properly, but pressure
drop too high.
MAINTENANCE
TROUBLESHOOTING THE 95-9237 SOLENOID VALVE
CONDITION POSSIBLE CAUSES HOW TO CHECK
A. No electrical power to
valve
B. Stem movement
restricted
A. Spring malfunction
B. Stem movement
restricted
C. Seat washer blown out
of retainer due to excessive
pressure
D. Seat washer worn or
damaged
A. Ruptured diaphragms
A. Short circuit in power
B. Short within the coil
A. Not getting full stroke
B. Obstruction in valve
body
Manually activate valve. If stem moves freely,
check and clean electrical connections.
Inspect electrical system.
Manually activate stem by pushing on lower
diaphragm piston. If more than 5 lbs. of force
is required to move stem, disassemble valve,
inspect and clean all parts.
Manually activate stem. Stem should offer 2-
6 lbs. resistance, but movement should be
quick and smooth. If there is very little
resistance, disassemble and check spring.
Manually activate stem by pushing on lower
diaphragm piston. If more than 5 lbs. of force
is required to move stem, disassemble valve,
inspect and clean all parts. Replace any
damaged or worn parts with new ones.
Remove stem from valve body and inspect
condition of seat washer.
Replace seat washer.
Disassemble valve and replace diaphragms
with new ones.
Inspect wires for worn insulation and check
connections.
Remove connections from coil and activate
switch, making sure connections dont touch.
If fuse doesnt blow, replace coil.
Energize coil. Check length of stroke - should
be approximately 1/8". If not, remove coil and
check for obstructions between armature and
armature stop. Clean all parts and reassemble.
Remove inlet and outlet connections and
inspect body.