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INSTALLATION INSTRUCTIONS
Before installation, compare the lift capacity of the electrical jack
with your trailer to ensure safe operation of the jack.
1. Park the trailer on a level surface and block the wheels.
2. This trailer jack has been designed to attach to the top surface of
the A-frame coupler.
3. Disconnect the trailer battery.
4. Detach the foot pad (#15) of the jack by removing the lock pin
(#13) and sliding it out.
5. Position the foot pad (#15) in line with the mounting hole with the
foot of the foot pad on the ground.
6. Support the trailer tongue by the frame with jack stands (not
included).
7. If replacing an old jack, remove the old jack from the coupler,
saving the washers and bolts.
8. Insert the electric jack through the A-frame coupler hole and align
the bolt holes so the motor housing is facing forward towards the
tow vehicle.
9. Secure the jack with three Grade 5, 3/8in.-16UNC bolts and
washers. Remove paint from around one bolt hole on the jack,
and from around the matching bolt hole on the trailer tongue. If
the paint layer is thick, add a flat washer between the jack and the
trailer to provide good contact. Exposed metal can be painted after assembly to prohibit
corrosion. Bolts should be tightened to 15-20 ft.-lbs.
Tip: The salvaged bolts from the old jack are acceptable for reuse if they are Grade 5 and in
good condition.
10. Connect the BLACK wire lead from the jack directly to the positive (+) terminal of the battery or
junction box. This unit has a built-in circuit breaker which automatically trips and resets if the
amperage is too high. Now connect the WHITE ground wire to the negative (-) battery
terminal or to the trailer frame.
11. Check for proper installation by pressing the up/down switch for extending/retracting the jack.
12. After checking for proper operation, be sure to reattach the foot pad to the inner tube of the jack
using the lock pin.
13. Retract the jack completely.
OPERATION
1. Park the trailer on a level surface and block the wheels.
2. Before operating the jack, extend the foot pad (#15) to the appropriate length and secure in
place with the 3/8" safety lock pin (#13) provided.
WARNING:
blocks may become unstable and fall.
3. Extend the jack by pushing the operating switch (#4) UP.
Note: Under heavy use, the internal circuit breaker may open, causing the motor to switch off. In
this case, release the operating switch, and wait 15 seconds for the breaker to reset before
resuming operation.
4. Retract the jack by pushing the operating switch (#4) DOWN.
Note: If you attempt to extend or retract the jack and it does not respond, it may be at the end of
Do not stack blocks under the jack's foot to increase the height. Stacked
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