AJ Hydraulic Trailer Jack 1/20 with Manual Override Screw Drive
$1,040.00
AJ hydraulic trailer jack, single leg, 20" stroke
Complete single leg hydraulic lifting system that bolts to the center tube of a gooseneck trailer. The AJ series is the 3.5" x 3.5" square tube in tube jack, and this system lifts 8,000 lbs. The rocker switch control replaces cranking a manual jack, which on a loaded horse or motorsports trailer is the difference between a two minute hook up and a fight.
Specifications
| Series | AJ series tube in tube |
|---|---|
| Legs | 1 |
| Lifting capacity | 8,000 lbs |
| Stroke length | 20" |
| Tube size | 3.5" x 3.5" |
| Manual override | Screw drive output shaft |
| Control | Weatherproof switchgear with rocker switch and key, standard |
Manual override: screw drive
If the system loses power, the jack can be driven with a drill through the manual override output shaft in the center of the top of the motor. Remove the pump cover, then the foil seal on top of the motor, and drive the override shaft with a reversible drill capable of at least 2000 rpm, using a 6mm (1/4 inch) Allen hex key. Clockwise retracts the jack and counterclockwise extends it. Take care that the drill does not contact wires or hoses. The drill has to reach 2000 rpm or the pump will not develop enough pressure to move the jack.
Standard and optional equipment
- Commercial single function pump with manual override screw drive
- Steel pump cover
- Weatherproof switchgear control with key standard, which also prevents unauthorized use of the system
- Wireless remote option, part 7823 for single function jacks
- Universal mounting brackets included
- Wire harnesses have a PVC high temperature nylon braid to hold up in the toughest environments
Battery requirement
EQ Systems recommends load testing the battery: it should deliver a minimum of 150 amperes at a minimum of 10.5 VDC for at least 30 seconds. Keep the terminals tight and free of corrosion, and keep the battery charged and maintained to the battery manufacturer's requirements. If the trailer sits between trips, Stay Charge parts 8400 and 8427 charge the trailer battery from the tow vehicle, and solar kit 70487 keeps the jack battery topped up.
Fluid and maintenance
The unit ships without fluid or mounting bolts, and bolt kits are available online. An AJ single leg system runs on Dexron III ATF, filled to about one inch below the top of the reservoir with the jacks fully retracted. Remember the level rises as the jacks retract. The reservoir must run with its vented breather cap fitted, not the flush shipping plug, or the jack will operate erratically. EQ Systems recommends owners inspect the system every 12 months, checking that all connections are tight and free from corrosion, particularly the ground to the pump stud and the positive cable to the motor solenoid.
Service parts
Replacement parts are identified from the unit itself, so verify against the parts identification charts or call EQ Systems at 800-846-9659 before ordering.
Documents
- EQ Systems Lifting Systems for Any Size Trailer (PDF)
- AJ Single Leg Installation and Operation Manual, EQ004R10 (PDF)
- Single Leg Trailer Jack Troubleshooting Guide (PDF)
- Hydraulic Cylinder Identification for Tube in Tube Jacks (PDF)
- Required Maintenance Items for EQ Systems Hydraulic Jacks and Slide Systems (PDF)