ULTRA 3502 ELECTRIC TONGUE JACK
P/N 38-944017
US PATENT 9,821,774 B1
Rev 2022.6.17
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 lbs. 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 -5 ½
″
.
Approximate Shipping Weight – 22 lbs.
INSTALLATION
1.
Block the wheels and support the trailer
″
A
″
frame
securely.
2.
Remove the existing jack.
WARNING: Failure to block trailer wheels securely could result in
personal injury and possibly death
.
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.
Align the motor head so that the motor housing is facing the
front of the “A” frame.
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.
5.
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 at all times when operating
the jack.
WARNING: Failure to block trailer wheels securely could result in
personal injury and possibly death
.
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.
Remove plug cap in the access hole. (located top center
of the housing cover)
2.
Insert the 11mm deep well socket (included) in the
access hole, over the drive spindle tang. Rotate the
socket clockwise to retract and counter clockwise extend.
3.
When complete, remove socket and replace plug cap.
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 the gear cover via 4 Phillips screws.
B.
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 use.
