Drain Valve - Maytag MFR Series Service Manual

The "door locked switch" would change back
to the unlocked position and with the latch bar
no longer behind the door handle lever tongue
the user would be able to pull the door handle
to open the loading door.
Pull cord release:
A door release lever in conjunction with a pull
cord is positioned to manually lift the door
release solenoid armature in the event there
is a need to open the door manually. The
pullcord is found behind the left end of the
lower service panel. In order to use this cord
to open the door, power must be removed to
open the drain valve and deactivate the door
lock solenoid. Then the cord may be pulled
down to release the door lock.
Mechanical considerations:
The moving parts of the door lock assembly
can bind as a result of corrosion or "crud"
build-up. The door lock latch bar has to
be free to move behind the tongue of the
doorhandle lever when pushed by the lock
solenoid armature and it must be free to
swing back when the door release solenoid is
activated. The latch bar pivots on a pin that
is pressed into the door lock housing. It must
not bind on this pin. The door lock solenoid
blocking bar must be free to drop behind the
lock solenoid armature when the solenoid
is powered and the bi-metal latch is heated.
This blocking bar must also be free to be
pushed up by the release solenoid armature
(or manual release lever when the cord is
pulled). The tongue of the door handle lever
must move the leaf spring forward (so the
latch bar can move) as the door is closed and
the handle is pushed back in the door closed
position. Check that the handle lever is not
bent or fractured, and check that the mounting
screws for the door lock assembly to the front
of the washer are tight.

DRain valve

The drain valve is a motor driven half-ball type
mechanical valve consisting of: a motor, a
valve body, shaft (with a water seal), return
spring and a pivoting half-ball inside the valve
body. The valve is normally open, which
means it closes when power is applied to the
motor terminals and opens when power is
removed (the return spring drives the valve
back open). In the case of the MFRxxPDC
washers, 1 three inch (O.D.) valve is used in
all models except the MFR80, which uses two
valves (for faster draining).
Because the valve motor is powered anytime
the washer is holding water it is one of the
components to check first when service is
required. Debris left in pockets can damage
the valve seat (Teflon ring). The motor can
overheat and burn. Check this if the washer
is blowing the small control fuses. The motor
coil resistance is normally about 120 ohms. A
burned winding can be quite low; closer to 10
ohms.
Drain valves can be repaired, but it is most
often more expedient to replace the valve
as an assembly. Be aware on new valves,
that the two inlet spout nipples are plugged
by a plastic membrane. If these plugs are
not opened as needed the water level hose
will not allow the level control to function and
overfill will result. When the valve is used
as the second valve in a two-valve model
(MFR80) these plugs are left in place.
The drain valve motor winding has a tap for
operation on 50 Hertz power. This tap must
not be used on 60 Hertz AC operation. The
valve motor will be "weak" and may burn.
Supply power should only be on the common
and the 60 Hertz terminals. A separate
ground wire bonds the motor frame to the
washer frame.
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