Ultra-Fab ULTRA 3502 Guide

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/ 13/4″ inner tube
Retracted Height - 251/2″
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.

ULTRA 3502 ELECTRIC TONGUE JACK
P/N 38-944017
US PATENT 9,821,774 B1
Rev 2022.6.17
MOTOR EXPLODED VIEW
No.
Part No.
Description
Q'ty
1
38-760001
GEAR HOUSING BASE
1
2
38-760002
BUSHING 16
1
3
38-760003
BUSHING 9.5
2
4
38-760004
COLLAR HEX HEAD
1
5
38-760005
THURST BEARING
1
6
38-760006
SPUR GEAR
1
7
38-760007
MAIN GEAR
1
8
38-760008
PINION GEAR 12T
1
9
38-760009
PIN 6X18
1
10
38-760010
PIN 3X14
1
11
38-760011
GEAR HOUSING COVER
1
12
38-760012
RUBBER PLUG
1
13
38-760013
LIGHT SWITCH
1
14
38-751152
M5
2
15
38-760015
GROMMET
1
16
38-760016
SNAP RING
1
17
38-760017
LIGHT
2
18
38-760018
MOTOR
1
19
38-760019
MOTOR HOUSING
1
20
38-760020
SWITCH HOUSING
1
21
38-760021
CIRCUIT BREAKER
1
22
38-760022
MOTOR SWITCH
1
23
38-760023
SWITCH BOOT
1
24
38-760024
LOCK WASHER M4.1
4
25
38-751010
SCREW M4X12
14
NOT SHOWN
38-760025
SOCKET 11MM DEEP WELL
MANUAL OVERRIDE
1

ULTRA 3502 ELECTRIC TONGUE JACK
P/N 38-944017
US PATENT 9,821,774 B1
Rev 2022.6.17
LOWER STEM ASSEMBLY EXPLODED VIEW
NOT SHOWN:
38-760114 LOWER STEM ASSEMBLY (INCLUDES 38-760102 AND 38-760113)
No.
Part No.
Description
Q'ty
1
38-760102
TUBE OUTER 2”
1
2
38-114452
SERRATED WASHER 8
4
3
38-760103
WASHER M8
4
4
38-760104
BOLT M8x25
4
5
33-760105
RUBBER BAND
1
6
38-760107
FOOTPAD STD 2"
1
7
38-141023
WIRE LOCK PIN
1
8(A-E)
38-760113
TUBE INNER 1.75”
ASSY
1
8A
38-760004
COLLAR HEX HEAD
1
8B
38-760109
RETAINING PIN
1
8C
33-760005
THRUST BEARING
1
8D
17-753230
GREASE ZERK 6-1.0mm
1
8E
33-760115
TUBE INNER 1.75”
1
9
38-751127
UPPER PIN
1
10
38-760111
COTTER PIN
1

ULTRA 3502 ELECTRIC TONGUE JACK
P/N 38-944017
US PATENT 9,821,774 B1
Rev 2022.6.17
WIRING DIAGRAM

ULTRA 3502 ELECTRIC TONGUE JACK
P/N 38-944017
US PATENT 9,821,774 B1
Rev 2022.6.17
TWO-YEAR LIMITED WARRANTY
ULTRA 3502/3502-7/4000/4002 TONGUE JACKS
THE MANUFACTURER NAMED BELOW MAKES THE FOLLOWING
WARRANTY WITH RESPECT TO THE ABOVE ULTRA-FAB PRODUCTS
1. This Warranty is made only to the first Purchaser (hereinafter called the “Original Purchaser”) who acquires this product for their own use.
2. This Warranty will be in effect for two years from the date of purchase by the Original Purchaser. It is suggested that the Original Purchaser
retain a copy of the dated bill of sale as proof of the date of purchase.
3. This Warranty covers only specified parts which shall be free from defects in material and workmanship under normal use. This Warranty does
not cover conditions unrelated to the material and workmanship of the product. Such unrelated conditions include, but are not limited to (a)
faulty installation and any damage resulting from such; (b) the need for normal maintenance and any damage resulting from the failure to provide
such maintenance; (c) failure to follow Manufacturer’s instructions for use of this product, and (d) any accident to, or misuse of, any part of this
product and any alteration by anyone other than the Manufacturer or its authorized representative.
4. In order to obtain the benefits of this Warranty, you should return the product which you find defective to the Manufacturer named below during
the period that this Warranty is in effect. All charges incurred in delivery of the product to the Manufacturer, and in picking it up after the
Warranty service has been completed, must be paid by the Original Purchaser.
5. Any item returned in the manner described in paragraph 4 will be examined by the Manufacturer. If it is found that the returned item was
defective in material or workmanship, the Manufacturer will repair it without charge for material and labor.
6. Ultra-Fab will pay freight on replacement parts during the first 90 days of ownership by the Original Purchaser.
7. The Manufacturer does not authorize any person or company to create any Warranty obligation or liability on their behalf.
8. IN NO EVENT SHALL THE MANUFACTURER BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. SOME STATES DO NOT ALLOW THE
EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.
9. ANY IMPLIED WARRANTY, INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR ANY PURPOSE, IS LIMITED TO THE
DURATION OF THIS LIMITED WARRANTY. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE
ABOVE LIMITATION MAY NOT APPLY TO YOU.
10. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FR0M STATE TO STATE.
57985 SR 19 S., Elkhart, IN 46517
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www.ultra-fab.com