ULTRA 3502-7 ELECTRIC TONGUE JACK with 7-WAY PLUG
P/N 38-944037
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 is internally grounded. Therefore,
for good electrical contact, clean well where the
″
A
″
frame comes in contact with the Tongue Jack Mounting
Plate.
4. Install the Electric Tongue Jack using original nuts and
bolts and the 3 serrated lock washers supplied with jack.
The serrated lock washer is placed under the bolt and
on top of the mounting plate.
5. 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.
6. 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.
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.
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.
LUBRICATION
1. The jack is lubricated before leaving the factory. Under
normal conditions, lubrication will be needed annually.
2. Grease the Jackscrew by extending the jack until the
grease fitting is aligned with the hole in the outer tube.
Using a standard grease gun and standard chassis lube,
give two pumps.
3. Grease the gears in gearbox.
a. Disconnect the 7-Way Connector from the tow
vehicle.
b. Remove the gear cover via 4 Phillips screws.
c. Grease the gears with chassis lube and reinstall
cover.
STORAGE
A hook and loop strap has been included to help store the
wire/connector to the jack when not in us
IN
ST
AL
LA
TI
ON
/OP
ERA
TI
ON