ULTRA 4002 ELECTRIC TONGUE JACK
P/N 38-944016
US PATENT 9,821,774 B1
Rev 051519
INSTALLATION/OPERATION
APPLICATION
The Ultra 4002 Electric Tongue Jack is a 12-volt motor-driven
screw jack for use on travel trailers, boat trailers, and cargo
trailers.
SPECIFICATIONS
Vertical Load – 4000 lbs. continuous over full stroke with 6000
lbs. instantaneous tongue breakaway capacity.
Travel – 18
″
Power Requirement - 12V DC.
Outer Tube - 2
″
Inner Tube – 1¾
″
Retracted Height - 25
1
/
2
″
Removable Foot Pad - 5
1
/
2
″
dia. (Adjustable)
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 4002 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.
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 4002 Electric Tongue Jack is operated by means of
the Motor Switch located under the motor housing.
3.
Extend the jack by holding the Motor 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 Motor 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 Motor 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
″
socket in the access hole, over the drive hex
head. Rotate the socket clockwise to retract and counter
clockwise to 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 after one year.
1.
Grease the jackscrew by extending the jack until the grease
fitting is aligned with the hole in the outer tube. Using
standard chassis lube grease and a standard grease gun, give
two pumps.
2.
Grease the gears in gearbox.
a.
Remove the fuse from fuse holder.
b.
Using a 6mm Allen Wrench, remove the four socket
head screws holding the motor/gear assembly to the
top of the outer tube. Lift this assembly up and off.
Unhook the wire connections in order to have enough
slack to remove.
c.
To remove the top of the gear/assembly first, remove
the motor housing (4 screws). Two of the screws that
hold the gear cover are under the motor housing.
d.
Remove the gear cover (4) screws and lube gears with
chassis lube.
e.
Reassemble the gear/assembly.
f.
Install the gear/assembly onto the lower stem, (it is
helpful to remove the rubber plug) and look through
the main gear in order to align the flats of the main
gear in the gear/assembly with the flats of the drive
collar of the lower stem. Turn collar to align flats if
necessary.
g.
Install the 6mm bolts and hook up wire connections.
IN
ST
AL
LA
TI
ON
/OP
ERA
TI
ON
