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Instruction Manual
Oildyne 108/118 and 165/175 Series
Hydraulic Power Units
Bulletin HY22-3210A/US
Parker Hannifin
HPS Division
New Hope, MN 55428 USA
Troubleshooting
FAILURE MODE CAUSE(S) CORRECTIVE ACTION
Motor doesn’t run Not wired properly Follow wiring schematics
Faulty on/off switch Replace switch
Power source is dead Check fuse
Turn on power supply
Replace with good battery
Dead spot in motor If all above are ruled out, replace motor
Faulty motor Replace motor
Motor runs backward Wired incorrectly Follow wiring schematics
Switch in wrong position Change switch position
Motor runs too fast Input voltage is too high Check power supply for correct voltage
Nothing is wrong – Series Wound motor is a
high speed motor (when under no load) Applies to 108 Series only
Motor runs too slow Input voltage is too low Check power supply for correct voltage
Pump is running against a load Ensure test valves are open (unrestricted)
Amp draw is too high Incorrect motor input voltage Verify correct voltage is used
Motor stalls out or quits Fuse blown Ensure correct fuse size is used
Motor thermal breaker kicked off Allow motor to cool, shorten duty cycle
Motor incorrectly wired Check wiring per drawing
Pump flow low Motor turning too slow Ensure correct input voltage
Solenoid valve is open Ensure valve is closed
Pump flow too high Motor running too fast Ensure correct input voltage
No flow Motor isn’t running Ensure motor is connected and power is on
Air in the pump – not primed Follow startup instructions for bleeding
Oil level in tank too low Fill tank to proper level
Solenoid valve is open Ensure valve is closed
Won’t build pressure No load valve in circuit Apply resistance to ow in circuit
Oil temperature too high/viscosity too low
Check oil temperature, cool as necessary, ensure
oil is thick enough for application conditions
Motor or voltage is incorrect Ensure motor and voltage are right
Solenoid valve is open Ensure solenoid valve is closed
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