Tennant 5400, Service Manual

Page: 118 / 163

ELECTRICAL
4-48
5400 330735 (3–01)
4. Orientate the solution valve and cable so the
set screw holding the cable end to the shaft
on the valve can be loosened. Use a 5/64
inch allen wrench to loosen the set screw.
5. Disconnect both solution hoses leading to
the valve.
6. Remove the two pan screws holding the
solution valve solenoid to the mount bracket.
7. Mark and disconnect both wires leading to
the existing valve. Remove the valve from
the machine. Reconnect the two wires to the
new solution valve. See the schematic in
this section. Note the direction of the diode
connected to the coil terminals. Make sure
the line side of the diode is connected to
wire #24 grey. Failure to do so will result in a
short circuit.
8. Install the new solution valve onto the mount
bracket. Reinstall the two pan screws and
tighten to 7 – 10 Nm (5 – 6 ft lb).
Turn the shaft on the solution control valve
clockwise with fingers until resistance is felt.
(this closes the valve opening)