General Instructions for 12V DC Systems
- Check battery voltage. If voltage is 9 volts or less, do not operate power unit. Charge battery to 12 volts.
- Check to see that the motor is wired correctly to the starter switch and all other control wires have tight connections.
- Check ground wire for good connection.
- Check reservoir oil level.
- Do not tamper with relief valve. It is factory preset to a specified pressure and wired. Cutting this wire voids warranty.
Symptoms
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Unit will not start
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See causes 1, 2, 7.
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Unit drifts when power is off
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See causes 3, 4, 5.
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Slow cylinder travel
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See causes 1, 2, 4, 5.
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Unit will not lower
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See causes 2, 3.
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Probable Cause
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Improper voltage to motor
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See solutions 1, 4, 5.
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Improper ground
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See solutions 1, 6, 7.
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Improper voltage to valves
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See solutions 1, 6.
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Leakage through solenoid valves
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See solutions 3, 4.
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Internal leakage at cylinder
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See solutions 4, 5.
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Insufficient oil to pump inlet
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See solutions 2, 3, 5.
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Pump seized or locked
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See solutions 4, 5.
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Possible Solution
- Check wiring to ensure that all connections are tight.
- Keep oil reservoir full and clean.
- Flush and clean cartridge valves and/or hydraulic system.
- Replace components.
- Return for necessary repair.
- Check for clean, tight, metal-to-metal contact on wire connections.
- Make sure the nut on top of the solenoid valve coil is tightened to 40 in. lb maximum.