If you can't get it working, you'll either have to get mobile service, or lift the front end with a hydraulic jack. You can probably buy a hydraulic jack from Harbor Freight or Northern Tools or Tractor Supply. Get a 20 ton if you can. Should be able to find one for < $60.
Are really trying to say lift the front end of a full size toy hauler with a POS HF $60 jack?
JohhnyR? How mechanically inclined are you? 12volt experience?
Do you have a LevelUp system?
Do you have a "up & down" switch on the front of the trailer?
The simplest thing to do would a) leave the trailer hooked up to the truck to prevent an unexpected trailer drop and then b) look behind the switch to see if all the wires are connected.
Same pump for slides and jacks. If slides work your issue has to deal with the electrical or hydraulic circuit to the jacks.
That switch is a "double pole-double throw" heavy duty item (might be 25-30 amp capacity)
When you push the switch in either direction you are doing two things (double pole-double throw)
- closing the circuit to the pump
- closing the circuit to the hydraulic jack solenoid
There are two types of solenoids, electrical high current solenoid for the pump motor and hydraulic solinoids that govern fluid flow.
The hydraulic solenoids only allows fluid to flow.
The switch reverses the current flow to the pump electrical solinoid to give you the hydraulic flow direction you need.
The wires should all have crimped on connectors. They
can fall off the switch and have fallen off the solenoid tabs on our trailer.
So, can you hear the pump run?
If not, can you hear the pumps electric solenoid activate?
If the pump runs in both directions have someone activate the switch for you and see if you can feel the jack solenoid operating.
If the pump runs in both directions (up or down, slides in or out) and the only thing that is not happening is the jacks moving, you should probably hear a change in motor pitch as the pump builds up pressure.
On many of the pumps for Cyclones IIRC, the jack solenoid is the bottom one.
If my pump ran and the jacks didn't move I think my first look would be to the solenoid wire, then maybe tap on it with a screwdriver to see if it activates.
Whatever you do, don't remove that solenoid with pressure on the landing gear.
Attached is a wiring note I posted for another member to add the manual switch to trailers with LevelUp systems. It should give you an idea of how your wiring may look.
If you are not comfortable doing any of the simple electrical checks above I would shy away from using any type of jacking to get the trailer off the truck. If you do not have experience lifting 3000-4000 pounds this can be a daunting task.