URIAH UC350020 Mode D'emploi page 4

Note: Under heavy use, the internal circuit breaker may open, causing the motor to switch off. In
this case, release the operating switch, and wait 15 seconds for the breaker to reset before
resuming operation.
4. Retract the jack by pushing the operating switch (#4) DOWN.
Note: If you attempt to extend or retract the jack and it does not respond, it may be at the end of
the stroke. If the jack fails to respond, try operating it in the opposite direction. If it will not
operate in either direction refer to the troubleshooting guide.
5. After hitching the trailer to a tow vehicle, slide the drop leg (#23) fully into the jack tube, secure
it with the safety lock pin (#22) and retract the jack tube. You may have to raise the jack tube
slightly to release pressure on the safety lock pin.
6. Always check ground clearance before driving off.
MANUAL OPERATION INSTRUCTIONS
1. If for any reason electric power is lost, disconnect the jack from the power source.
2. Remove the rubber access cover on the top of the jack.
3. Insert the manual crank handle into the access hole on the top of the jack, engaging the drive
screw.
4. Rotate the manual crank handle counter-clockwise to extend the jack, and clockwise to retract
it.
MAINTENANCE
1. The Electric A-frame jack motor is sealed and maintenance-free. It is important to maintain the
electrical system including the battery and charger (not included).
2. Ensure all connections are tight and free of corrosion and that the jack is properly grounded .
3. Make sure the battery is fully charged prior to use.
TROUBLESHOOTING
Refer to below troubleshooting guide if the device does not function properly or parts are missing. If
unable to do so, have a qualified technician service the device.
Failure Possible Cause
No or Low Voltage
Poor Ground
Motor will not
operate
Or light is OK,
but jack will
The trailer connector on
not operate.
the jack cannot get
power from the trailer
connector on the vehicle
Open Internal Circuit
Breaker
Check battery & electrical connections. Must have minimum of
10 VDC. If the battery is low, plug the trailer cable into the tow
vehicle, and start the tow vehicle to provide power to the jack.
Clean area between the jack mounting plate and coupler, and
ensure paint has been removed by the star washers.Direct
metal-to-metal contact must exist between mounting
components to ensure good electrical contact.Check electrical
connections.
The trailer connector on the vehicle must match the trailer
connector on the jack to power it.
Test that the correct terminal is receiving power with a test
light. Number 4 on the connector will receive power.
Connector number 1 is the neutral ground. Consult a qualified
technician on replacing the connector if there is a mismatch
between the vehicle and jack connectors.
Wait 15 seconds for breaker to close or replace with thermal
overload protector
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Corrective Action