Meyer ELECTRO LIFT E-46 User manual

DIAGNOSTIC FLOW CHART FOR
E-46, E-47 and E-57 ELECTRO LIFT®UNITS
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 trouble-
shooting.
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
NEGPOS
20A
Motor Solenoid
(Must be grounded)
22092
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"
DRAINPLUG
DRAIN
FILTERS
To Positive
Battery Terminal
Ground
Coupler
Weather Cap
Coupler
Weather Plug
1-634
May, 2003

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
NO
NO
YES
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,
PistonAssembly.
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?
Arewires 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 theA-Frame
stops.
Replace
O-Rings
Replace the
P.A. Block
YES
Will the snow plow angle
right &leftif not allowed
to travel to extreme
angled position?
YES
Does the motor run
when angle switch
is pushed?
NO
Replace Harness ReplaceAngle
Switch
NO
NO
Does the snow plow
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 fromA-Frame?
Does the snow plow
raise instead of
angling left?
NO
NO
Relieve the interference
between the
Sector andA-Frame.
NO
Clean or replace the
"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 NOTANGLE 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 ReplaceAngle
Switch
Can the snow plow
angle to the Left?
Does the snow plow
raise instead of
angling left?
NO
NO
Does the "C" Coil
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 NO
Is there power
leaving the switch?
Are the wires in
molded connector
making contact with
the switch?
ReplaceAngle
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.
NO
NO
Does the moldboard
hold left angle & release
fromright 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
NO
Change Pilot Check
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