These charts are intended to be used as an aid in diagnosing problems on the E-68 Meyer Hydraulic Power 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. Additional detailed information as well as all electrical schematics may be found in Service Manuals 1-822.
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 hose from the left cylinder into the right cylinder
and pushing the snowplow by hand.
2. The power angling cylinders must be installed correctly. The left cylinder has a hose with a female half of a coupler attached while the
right cylinder only has the male half of a coupler attached. Reverse them if installed on wrong side.
3. Mount Cylinder top hose has female coupler; bottom is male.
4. The electrical installation must have been made according to instructions supplied by Meyer Products LLC.
TESTING TIPS
Many tests do not require removing the Power Unit from the vehicle. However, more thorough testing can be done by using the Meyer
Test Stand which allows direct pressure and Amperage readings.
1. Use a screwdriver or other small tool to check for magnetism of solenoid coils (“A”, “B”, “C”, “D” & “E”). 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 harness or controller.
3. When determining Amp draw of motor, always obtain the highest value possible, i.e., at maximum raise or angle with motor running.
4. The pump shaft of a good pump can be turned smoothly using two fingers. If it can’t be turned easily, the pump 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 adapter is necessary
for the filter port). (See Service Manual 1-822)
7. If hydraulic system is contaminated it is recommended that the hydraulic unit, power angling rams and hoses be drained and flushed
clean with M2 fluid. See page 24. The system should then be refilled with Meyer M-1 oil. See pages 9, 24.
DIAGNOSTIC
TROUBLE SHOOTING
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