3
REF
A-D
A
B
C
D
E-J
E
F
G
H
I
J
K
DESCRIPTION
Upper Jack Assembly; includes all housing,
gear motor box assembly & items a - d
Gearbox
Plastic cover assembly
Operate switch & Light switch
LED light strip
Lower Jack Assembly; includes outer jack tube,
Inner jack tube, screw shaft & items e-j
Jack lower assembly (including outer tube,
inner tube and screw)
25A circuit breaker
3/8" safety lock pin
Removable foot pad
Manual crank handle
3/8" Star Washers
7-pin connector
CAUSE
Poor Ground
No or Low Voltage
SOLUTION
Clean area between the jack mounting plate and coupler, and ensure
paint has been removed by the star washers. Direct metal-to-metal
contact must exist between mounting components to ensure good
electrical contact.
Check battery & electrical connections. Power supplied must be at least
10V DC. If the battery is low, plug the trailer cable into the tow vehicle,
and start the tow vehicle to provide power to the jack.
Do not operate the jack without a lower support plate.
6. Attach foot with 3/8" safety lock pin. Be sure to insert pin through the complete assembly
closing safety.
7. Connect 7-pin connector to vehicle’s trailer plug, or if hard wiring connect the black positive
leadto the positive terminal of the battery. The electric tongue jack is internally grounded,
and needs no ground wire if A frame is properly grounded.
OPERATION INSTRUCTIONS
1. Park your trailer on a level surface and block all dolly and trailer tires.
Tip: For night time hookups, flip the light switch ON to illuminate your work area.
2. Before operating the jack, attach the foot with the 3/8" safety lock pin provided.
DO NOT stack blocks under the jack’s foot to increase the height. Stacked blocks may
become unstable and fall.
The jack must be applied with the original foot, otherwise the jack will be damaged.
3. Normal operation:
(1) Extend the jack by pressing the UP button.
(2) Retract the jack by pressing the DOWN button.
NOTE: The jack will not slow down and stop as it approaches the fully retracted
position. Release the switch at the first sign of slowing.
DO NOT retract the jack exceeding the STOP limiting mark, otherwise may result in
damage of jack.
4. Before driving, remove the foot or position it in the highest position and completely retract
the jack.
MANUAL OPERATION INSTRUCTIONS
Park your trailer on a level surface and block all dolly and trailer tires.
Before operating the jack, attach the foot with the 3/8" safety lock pin provided.
1. Disconnect the jack from the power source.
2. Remove the rubber access cover on the top of the jack.
3. Insert the manual crank handle into the access hole on the top of the jack, engaging the
drive screw.
4. Rotate the manual crank handle counter-clockwise to extend the jack, and clockwise to
retract it.
5. Remove manual crank handle and replace manual override plug.
MAINTENANCE
To keep your jack in good, functional condition, fully extend the jack and clean the inner jack
tube once a year. After cleaning, coat the tube with a light grease or silicone spray lubricant.
Always avoid high pressure water cleaning to prevent water penetration into components.
TROUBLESHOOTING
REPLACEMENT PARTS
Size: 145x210mm
REV 03/31/20
157
克铜版纸
Great Circle USA
Support Line: 1-866-493-0524
www.greatcircleus.com