Insinger GalleyMaster 135-LH-E Technical Manual page 26

Inspection and repair of solenoid actuated valves.
Solenoid valves are used on the machine for controlling
steam to the booster heater and wash and rinse tank
coils (steam heated machines) and the flow of final hot
rinse water. If the valve in question will not close, or will
not open, inspect the valve.
Preliminary electrical check.
!
WARNING:
The following steps require testing with
machine power on. These tests should
only be made by a qualified electrician.
1. A solenoid valve is opened by a mechanical plunger
which is lifted when voltage is applied to the valve
coil. Make sure there is voltage to the coil. If the
solenoid valve will not open and there is no voltage at
the coil, the problem is somewhere in the solenoid
control circuit (thermostat, wires, or other controls).
2. If the valve will not open and there is correct voltage
to the coil, disconnect all power to machine and re-
move the coil. Visually check for signs of heat discol-
oration or carbon deposit due to a short circuit in the
coil. Check the coil winding with a meter for electrical
continuity. No continuity means an open coil and it
must be replaced.
Inspection and repair of final rinse solenoid valve.
See Figure 6-9.
1. Disconnect electrical power supply to machine. Shut
off water supply to the valve. Remove clip on top of
molded coil and remove nameplate, coil, and flux-
plate from solenoid base sub-assembly.
2. Unscrew 4 hex screws bolts and remove base sub-
assembly, core assembly, and core spring. Remove
diaphragm spring, diaphragm assembly, and body
gasket.
3. Inspect rubber diaphragm for wear, deterioration, or
holes. Inspect all parts for dirt, wear, lime build-up or
physical damage. Clean or replace as required.
A repair kit (D2930-RK) is available to rebuild this
valve. If the seat or the bottom half of the valve is
worn or badly corroded, the entire valve must be re-
placed.
4. Reverse procedure to re-assemble valve. Note that
GalleyMaster DOC Revision 2006
PART 4 MAINTENANCE & REPAIR PROCEDURES
Inspection and repair of steam solenoid valves. See
Figure 6-10.
1. Disconnect electrical power supply to machine. Shut
off water supply to valve. Remove clip on top of
molded coil and remove nameplate, coil, and spring
washer from solenoid base sub-assembly.
2. Unscrew and remove solenoid base sub-assembly,
core assembly, core spring, and solenoid base gas-
ket.
3. Remove bonnet screws, valve bonnet, piston assem-
bly, lip seal, support, inner and outer body gaskets.
4. Inspect all parts for wear, deterioration, dirt, lime
build-up or physical damage. Clean or replace as
required.
A repair kit (D2490-R3-RK) is available to rebuild this
valve. If the bottom half of the valve is worn or badly
corroded, the entire valve must be replaced.
5. Reverse procedure to re-assemble valve.
Removal and replacement of recirculating pump.
Before disassembling a pump, drain the tank and re-
move the suction strainer (inside tank). Inspect the
pump inlet for foreign objects.
Working parts of pump can be serviced by removing the
pump motor and impeller adapter (held on by four (4)
3/8" dia. hex head screws) from the pump body. See
þ
Repair or replace pump motor or impeller as required.
Removal and replacement of conveyor drive sprock-
ets. See Figure 6-11.
Removal.
Rotate the spring loaded idler arm to release drive belt
tension and remove the drive belt.
Take both screws (A) out completely. Insert one screw
into hole B (with threads in the bushing only). Use this
screw as a jackscrew to disengage the bushing.
25
NOTE:
It is not necessary to remove pump body
from the machine.
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