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DIAGNOSTIC FLOW CHART FOR E-46, E-47 and E-57 ELECTRO LIFT

Discussion in 'Meyer / Diamond Products Discussion' started by J.B plowing, Dec 10, 2009.

  1. J.B plowing

    J.B plowing Junior Member
    Messages: 8

    DIAGNOSTIC FLOW CHART FOR
    E-46, E-47 and E-57 ELECTRO LIFT® UNITS
    WITH INDIVIDUAL TOGGLE SWITCHES OR SLICK STICK
    These charts are intended to be used as an aid in diagnosing problems on the Electro Lift® units. They are not a substitute for factory
    training and experience. Be certain to read the General Information and Testing Tips sections before attempting any troubleshooting.
    IMPORTANT: Maintenance and repairs must be performed with the moldboard on the ground.
    General Information
    Before any troubleshooting is started, make certain the following conditions are met.
    1. The moldboard is pointing straight ahead. This can often be done by coupling the left cylinder into the right cylinder and
    pushing the moldboard by hand.
    2. The power angling cylinders must be installed correctly on to the A- frame. The left cylinder (Driver’s side) has a hose
    attached with a male half of a coupler at the end; the right cylinder (Passenger side) has a hose attached with a female half
    of a coupler at the end.
    3. The solenoid coils must be on their proper valve. The “C” coil (green wire) must be next to angling fittings. The “B” coil
    (red wire) is located to the front of the Electro Lift® Unit. The “A” coil (black wire) is smaller and is located on the back side
    of the unit. (See Drawing).
    TESTING TIPS
    Many tests do not require removing the Electro Lift® unit from the vehicle. However, more thorough testing can be performed
    using the Meyer Test Stand which allows direct pressure and amperage readings.
    1. Using a screwdriver or other small tool to check for magnetism of the solenoid coils “A”, “B”, “C”. Place the tool on the nut
    securing the coil and have an assistant operate the switch. You should feel strong magnetic attraction.
    2. Use a test light or volt meter to determine whether there is power at the harness or switch.
    3. When determining AMP draw of the motor, always obtain the highest value possible, i.e, at maximum raise or maximum
    angle with motor running.
    4. Proper rotation for the 3” motor (American Bosch) is indicated by an arrow located on top side of the (Part # 15026) pump.
    5. The pump shaft of a good pump can be turned smoothly using two fingers. If it can’t be turn easily, the pump is too tight
    and must be replaced.
    6. Pump pressure can be measured at an angle hose (note pressure at full angle) or in the pressure filter port (an adaptor is
    necessary for the filter port). Note: The E-57 Electro Lift® Unit has a non adjustable pressure relief valve.
    7. Flush the complete system including unit, hoses and power angling rams with a non wax (Napthenic) cleaner. If kerosene
    (Parrafinic) is used to flush the system, the system must be flushed again to remove any kerosene with a (Napthenic)
    based cleaner that is wax free.
    To Motor
    BATTERY
    NEG POS
    20A Motor Solenoid
    22092 (Must be grounded)
    White
    15680
    To Ignition Switch
    (Accessory Side)
    + -
    A2 D1
    FUSE
    To Passenger Side
    Power Angling Ram.
    (Angle Left)
    To Driver's Side
    Power Angling Ram.
    (Angle Right)
    RED "B"
    GREEN "C"
    BLACK "A"
    "A"
    Pressure Relief
    Filler Plug
    "C"
    "B"
    DRAIN PLUG
    DRAIN
    FILTERS
    To Positive
    Battery Terminal
    Ground
    Coupler
    Weather Cap
    Coupler
    Weather Plug
    WHITE
    WHITE
    SWITCH ANGLE
    SWITCH
    RAISE
    &
    LOWER
    BLACK BLACK
    FUSE
    IGNITION
    SWITCH
    BLACK
    WHITE
    RED
    GREEN
    A
    B C
    MOTOR
    MOTOR
    SOLENOID
    BATTERY
    + -
    Individual Toggle Switches Slick Stick
    SNOW PLOW WILL NOT RAISE
    Does the
    Motor Operate?
    Is there power
    going to
    the motor?
    Are all electrical
    connections clean
    and tight?
    Is Battery Charged?
    Charge Battery -
    Clean and tighten
    all electrical
    Connections.
    Remove motor.
    Does motor run when
    12 volts is applied?
    Inspect Motor -
    Armature, Brushes
    Repair or Replace
    Motor as necessary
    Is there power
    going to the
    motor solenoid,
    at White Wire?
    Is there power
    leaving the
    switch?
    Check switch
    for Continuity
    Check Wires at
    Molded connector.
    Can the pump
    shaft turn by
    hand?
    Replace pump.
    Replace the
    Motor
    Solenoid.
    Replace the
    Wiring
    Harness.
    Is the Fuse
    OK?
    Is Ground Cable
    attached to the
    Negative (-)
    Battery Terminal?
    Replace the
    Raise
    Switch.
    Does the snow plow
    angle to the left
    instead of raising?
    Does the snow plow
    angle when the
    Angle Switch
    is activated?
    Is there pressure
    (or flow) at the
    Filter port?
    Is the "A" Valve
    stuck in the
    open position?
    Clean or Replace
    "A" Valve.
    -Retest -
    Does snow plow
    raise?
    Disassemble unit -
    Inspect O-rings,
    Cylinder,Piston
    assembly.
    Look for blockage in
    Sump Casting
    passages.
    Can pump relief pressure
    be adjusted to
    1650 + 50 P.S.I
    E-46 & E-47
    Are the
    Filters
    Clogged?
    Clean
    or
    Replace
    Filters.
    Is the motor turning
    the proper direction?
    Check for clogged
    strainer - Is oil getting
    to the pump?
    Check Brushes for
    proper installation or
    replace motor.
    Clean strainer
    and flush the
    system completely.
    Replace
    the
    Pump.
    Is the pump
    shaft turning
    tightly?
    Does the motor
    armature turn
    tightly?
    Replace
    the
    Pump.
    Repair or Replace
    the motor.
    Replace Fuse.
    Check for short
    in Harness,
    "B" Coil, Switch
    Connections,
    Motor Solenoid,
    Electric Motor.
    NO
    NO
    NO NO
    NO
    NO NO
    NO
    NO
    NO NO NO NO NO
    NO
    NO NO
    NO NO NO
    NO NO NO
    NO
    NO NO
    YES
    YES
    YES
    YES
    YES
    YES YES YES
    YES
    YES
    YES
    YES
    YES
    YES
    YES YES
    YES
    YES
    YES YES YES
    YES
    YES YES
    Does the "B" Coil
    (Red Wire) have
    magnetism?
    Are the "B" Valve
    O-Rings in good
    Condition?
    Replace
    O-Rings.
    Clean or
    Replace the
    "B" Valve
    and retest.
    Replace P.A. Block
    with E-46 plate and
    retest. - Does snow
    plow Raise now?
    Replace
    Sump Base.
    Replace
    P.A. Block
    Is there power to
    the "B" Coil?
    (Red Wire)
    at Harness
    Is there power
    leaving the switch
    at the red wire?
    Replace
    "B" Coil.
    Replace
    the wiring
    harness.
    Replace
    the Raise
    switch.
    Are wires in
    molded connector
    making contact
    with the switch?
    Is the fluid level
    1-1/2" below
    filler hole?
    ADD M-1
    Fluid
    SNOW PLOW LEAKS DOWN
    Does the
    snow plow drop
    straight down?
    Does the snow plow
    drop and angle
    to the left?
    NO
    YES NO NO
    YES
    NO
    NO NO
    NO
    NO
    NO NO NO
    SNOW PLOW WILL NOT LOWER
    NO NO
    YES YES YES
    NO
    Replace
    "B" Check Valve
    Does it now hold?
    Replace
    "B" Valve
    Does it now hold?
    Replace
    Sump Base
    Are "A" Valve O-rings
    in good condition?
    Does "A" Valve stem
    move freely?
    Replace O-Rings
    Replace "A" Valve
    "E-46 ONLY"
    Replace Pump Check Valve
    (Remember to coin the ball to the seat).
    Does it now Hold?
    Dissasemble unit
    Inspect O-Rings,Cylinder,
    Piston Assembly.
    Does it hold now?
    Replace
    Sump Base
    E-47: Dissasemble unit
    Inspect O-Rings,Cylinder,
    Piston Assembly.
    Does it hold now?
    Replace
    Sump Base
    Does "A" Coil
    (Black Wire) have
    magnetism?
    Replace "A" Valve
    Does it now lower?
    Is there power to the
    "A" Coil (Black Wire)
    at harness?
    Is there power leaving
    the switch at the
    Black Wire?
    Are wires in molded
    connector making contact
    with the switch?
    Replace
    "A" Coil
    Check for a clogged
    filter or a blocked
    passageway.
    Check for Bent or
    Siezed Ram
    Assembly.
    Replace
    Switch
    Replace
    Harness
    Is Fuse
    OK?
    YES
    Replace the fuse -
    Check for short in
    harness, "A" Coil,
    Switch connections.
    YES
    YES
    SNOW PLOW WILL NOT ANGLE LEFT
    Can the snow plow
    Raise?
    See the Raise
    Flow Chart
    Section
    NO
    NO NO
    YES YES YES
    NO
    Is there power to
    the motor solenoid?
    (White Wire)
    Is there power
    leaving the switch?
    Are the wires in
    molded connector
    making contact with
    the switch?
    Are "C" Valve
    O-Rings in good
    condition?
    Replace
    Piston
    Weld
    1-1/2" x 1-1/2" x 1/2"
    spacers to the A-Frame
    stops.
    Replace
    O-Rings
    Replace the
    P.A. Block
    YES
    Will the snow plow angle
    right & left if not allowed
    to travel to extreme
    angled position?
    YES
    Does the motor run
    when angle switch
    is pushed?
    NO
    Replace Harness
    Replace Angle
    Switch
    Does the snow plow NO NO
    angle to the right when
    the angle switch is
    pushed left?
    Is the ampere draw
    less than 100 amperes
    while trying to angle
    snow plow?
    Can the snow plow be
    angled by hand when
    the P.A. Rams are
    disconnected from A-Frame?
    Does the snow plow
    raise instead of
    angling left?
    NO
    NO
    Relieve the interference
    between the
    Sector and A-Frame.
    Clean or replace the NO
    "C" Valve.
    Retest
    Is the Pilot piston in
    good condition?
    (worn/sloppy or Missing)
    Clean or replace the
    "B" Valve.
    Retest
    Does pressure remain
    in angle hose when the
    motor is not running?
    NO
    NO
    YES
    YES
    YES
    NO
    Temporarily put 1/2" blocks
    between the Sector and
    A-Frame to limit the degree
    of angle. Will the snow plow
    now angle?
    Replace both the
    Coupler sets and/or
    clean or replace the
    "C" Valve.
    If both hoses are stiff
    inspect the Pilot Check
    Piston and "C" Valve
    for binding.
    If one hose is stiff
    inspect the the "C"
    valve for binding.
    Replace Coupler sets.
    Clean or replace
    the Crossover Relief.
    Does the snow plow
    now angle?
    YES YES
    YES
    YES
    NO
    YES
    Replace both the
    Coupler sets and/or
    clean or replace the
    "C" Valve.
    SNOW PLOW WILL NOT ANGLE RIGHT
    Can the snow plow
    Raise?
    See the Raise
    Flow Chart
    Section
    NO
    NO NO
    YES YES
    NO
    Is there power to
    the motor solenoid?
    (White Wire)
    Is there power
    leaving the switch?
    Are the wires in
    molded connector
    making contact with
    the switch?
    Are "C" Valve
    O-Rings in good
    condition?
    Replace the
    "C" Coil.
    Retest
    Replace
    O-Rings
    Replace the
    P.A. Block
    YES
    Does the motor run
    when angle switch
    is pushed?
    NO
    Replace Harness
    Replace Angle
    Switch
    Can the snow plow
    angle to the Left?
    Does the snow plow
    raise instead of
    angling left?
    NO
    Does the "C" Coil NO
    have magnetism?
    (Green Wire)
    Is there power to
    the "C" Coil?
    (Green wire at harness)
    Clean or replace the
    "B" Valve.
    Retest
    NO
    YES
    Clean or replace
    the Crossover Relief.
    Does the snow plow
    now angle?
    YES YES
    YES
    NO Is there power NO
    leaving the switch?
    Are the wires in
    molded connector
    making contact with
    the switch?
    Replace Angle
    Switch
    YES
    Replace Harness
    YES
    YES
    YES
    SNOW PLOW WILL NOT HOLD ANGLE
    Bleed air from the system
    and snug up gland nuts.
    Check couplers and fittings
    for leaks.
    Does the moldboard NO NO
    hold left angle & release
    from right angle?
    Are the "C" Valve
    O-Rings in poor
    condition?
    Is Crossover Relief set
    at 3800 + 400 P.S.I.?
    Are Crossover O-Rings
    in good condition?
    Are the Rams mushy?
    Can you push the moldboard
    6" to 8" by hand?
    NO
    Replace O-Rings Replace the
    P.A. Block
    Change Pilot Check NO
    Ball and Seat.
    does snowplow
    now hold?
    Inspect Crossover Relief.
    (Rebuild or Replace)
    Does snow plow now
    hold angle?
    Inspect "C" Valve O-rings
    Change if necessary. Does
    snow plow now angle?
    YES YES YES
    NO Replace the
    P.A. Block
    YES
    NO Set Crossover Relief to
    3800 + 400 P.S.I.
    Replace Crossover O-Rings
    or complete Crossover.
    NO