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DIAGNOSTIC FLOW CHART FOR
E-58H & E-78 Unit
These charts are intended to be used as an aid in diagnosing problems on the E-58H & E-78 unit. They are not a substitute for factory
traini
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 push-
ing the moldboard by hand.
2. The power angling cylinders must be installed correctly on to the plow assembly. The left cylinder (Driver’s side) has a hose
attached with a female half of a coupler at the end; the right cylinder (Passenger side) has a hose attached with a male half of
a coupler at the end.
3. The solenoid wires must be on their proper coil. The “A” coil (black and tan wires) on power angling block labeled “BLK”. The
“B” coil (red and tan wires) on power angling block labeled “RED”. The “C” coil (green and tan wires) on power angling block
labeled “GRN”.
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” and “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.
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 motor is indicated by an arrow located on top side of the (Part # 15889) 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-58H & E-78 Unit has a non adjustable pressure relief valve.
7. Flush the complete system including unit, hoses and power angling rams with Meyer Hydra-Flush™ Fluid M-2.
E-58H Only
The current 22154 Electro-Touch Control has been redesigned. The Touch Pad now has raised buttons and its circuitry has been
changed from analog to digital, functions have not changed. For troubleshooting for power at the solenoids do not disconnect
wires. To check for power, prick the wire through the insulation for testing. The Electro-Touch Control knows when a short or an
open connection occurs and will go into overload mode for the function being activated. To reset the Touch Pad turn the switch
on and off.
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