Ultra-Fab Ultra 3502 Installation & Operation

APPLICATION
The Ultra 3502 Electric Tongue Jack 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
capacity.
Travel – 18"
Power Requirement -12 volt D.C.
Model # 3502 - 2" outer tube w/ 1
1 "
Retracted Height - 25 /
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 Electric Tongue Jack.
3. Install the Electric Tongue Jack using original nuts and
bolts. 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 that the motor housing is facing the driver
side of the trailer.
4. The Electric Tongue Jack was designed to replace an existing
manual 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.
INSTALLATION/OPERATION
tongue breakaway
3 " inner tube
/
4
ULTRA 3502 ELECTRIC TONGUE JACK
5. Install Fuse Holder. By cutting the red wire loop, then either
crimping or soldering the connections, attach one end to the
positive post of the trailer battery. The other end of the fuse
holder's red wire will be connected to the red wire from the
jack. This red wire provides 12V power to jack.
6. Connect the red positive lead to the positive terminal of the
battery. Connect the black ground wire to negative terminal
of the battery.
WARNING: When using an extension wire, DO-NOT use smaller
than #10 gauge 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. The Ultra 3502 Electric Tongue Jack is operated by
means of the Toggle Switch located under the motor
housing.
3. 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.
4. 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 fuse. (unscrew and pull apart)
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,
and reassemble the fuse connection.
LUBRICATION
The jack is lubricated before leaving the factory. Under
normal conditions, lubrication will be needed annually.
1. 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.
2. Grease the gears in gearbox.
A. Remove fuse from fuse holder.
B. Remove the gear cover via 4 Phillips screws.
C. Grease the gears with chassis lube and reinstall
cover.
D. Reinstall fuse.
P/N 38-944017
US PATENT 9,821,774 B1
Rev 05.15.19