ULTRA 3502-7 ELECTRIC TONGUE JACK with 7-WAY PLUG
P/N 38-944037
US PATENT 9,821,774 B1
Rev 05.15.19
INSTALLATION/OPERATION
APPLICATION
The Ultra 3502-7 Electric Tongue Jack with the 7-Way
Connector is a 12-volt motor- driven screw jack for use on
travel trailers and boat trailers.
SPECIFICATIONS
Vertical Load: 3500 lbs. continuous over full stroke with
5000 instantaneous tongue breakaway capacity.
Travel – 18″
Power Requirement -12 volt D.C.
Model # 3502 - 2″ outer tube w/ 1
3
/
4
″ inner tube
Retracted Height - 25
1
/
2
″
Removable Foot Pad -6″ dia.
Approximate Shipping Weight – 22 lbs.
INSTALLATION
1. Block the wheels and support the trailer ″A″ frame
securely.
2. Remove the existing jack.
NOTE: Save the original nuts, bolts, and washers for
installing the Ultra 3502-7 Electric Tongue Jack.
3. The Electric Tongue Jack was designed to replace an
existing crank down jack. The diameter of the outer
tube of your chosen jack, will need to match the
existing hole size, or you will need to modify the hole
diameter to fit.
4. Depending on user’s personal preference, align the
motor head so that the motor housing is facing the
front of the ″A″ frame or so the motor housing is facing
the driver side of the trailer.
5. Insert 7-way plug into the 7-way receptacle on tow
vehicle.
WARNING: DO-NOT use extension wire.
CAUTION: We do not recommend using the flip-up type
footpad. Doing so requires the tongue jack to be altered which
voids the warranty and can cause the failure of the jack.
OPERATION
1. Block trailer wheels securely.
2. Plug the Tongue Jack 7-Way connector into the 7-way
male receptacle on the tow vehicle (after disconnecting
your trailer 7-Way connector).
3. The Ultra 3502-7 Electric Tongue Jack is operated by
means of the Toggle Switch located under the motor
housing.
4. Extend the jack by holding the Toggle Switch in the
Extend position.
CAUTION: The motor will stall if jack reaches the full
extent of travel both in retract and extend directions.
There is an over load protection for the jack to shut off
power that will auto reset in 15 seconds. After using jack,
operator should learn the travel limit stops. The operator
should stop the jack before reaching the travel limit.
5. Retract the jack by holding the Toggle Switch in the
Retract position. The jack is now fully retracted.
NOTE: If the motor should stall with the jack in the fully
retracted position, and the Toggle Switch is not released,
the motor will automatically switch off.
TROUBLESHOOTING: If you find the jack will not run, check
to see if the lights to the jack turn on. If the lights do not
turn on, the jack is not getting powe r.
1. Please check to make sure the CHARGE LINE from the
tow vehicle is “hot” to the tow vehicle 7-way receptacle.
Check the owner’s manual of the tow vehicle to find the
location of the fuse for the charge line to 7-way receptacle.
Usually it is under the hood. Make sure the tow vehicle
charge line is hooked up to the 7-way receptacle of the tow
vehicle.
2. The 7-way plug to the jack may have a piece of plastic
covering the connection left over from the creation of the
plug – use a pocket knife to scrape away the plastic.
3. The tow vehicle may need to be running to make the
charge line hot.
MANUAL OPERATION
1. Disconnect the 7-Way connector from the tow vehicle.
2. Remove plug cap in the access hole. (located top center
of the housing cover)
3. Insert the 9/16” deep well socket (included) in the
access hole, over the drive spindle tang. Rotate the
socket clockwise to retract and counter clockwise
extend.
4. When complete, remove socket and replace plug cap.
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