My hydraulic pump lifts actuators up and down.

If no hydraulics are operating then there may be a few things to look at. Check the hydraulic fluid level as drive and bucket controls are hydraulic based. The hydraulic pump is shaft driven by the hydrostatic pump. If the fluid level is not proper, this could cause symptoms. Air in the system is another factor but most systems are self purging.

There are filters in various points around the unit and are 40 micron. Main filter has s bypass should filter be clogged. However, the smaller filters do not. The hydraulic system stays at charge pressure and fluid flows through control valves until actuated. If a spool is stuck, it may be bypassing fluid not allowing pressure to build up. Should give a basic starting point to troubleshoot further.

Here is the manual for the 2000, 3000, 4000 and 5000,
https://data2.manualslib.com/pdf5/106/10527/1052659-ford/2000.pdf?6cbe67364f75a5d5bf88cf05a43220e6

Here is a video of 1 with the bucket attachment showing the filter location on it,
https://youtu.be/GmBbi4CUK7o

And here is a answer;
http://www.fixya.com/support/t26353627-hydraulic_filter_1964_ford_4000_tractor

More info added;
The rear differential fluid level check plug is behind your right heel as you are seated on your tractor. Once again, it is a small square-headed pipe plug. You may have to squat down to see this plug.

The rear differential reservoir is where your hydraulic pump draws fluid. The filler cap is on top of the rear differential center housing. (some have two filler caps there - both serve the same purpose).

The drain plugs are square-head plugs that are recessed. You have to get under the trans and rear end to see them. Also, the drawbar may obscure the rear end drain plug. I have to unbolt my drawbar and slide it back to get to my rear drain plug.

Use FORD 134A tractor hydraulic fluid or equivalent Universal Tractor Fluid in both reservoirs. You can get UTF from Tractor Supply Stores, auto parts stores, Wal-Mart, etc.

There is a hydraulic filter and suction screen deep down below your hydraulic lift cover (under the seat). If you want to change the filter, and clean the screen, you will have to pull the hydraulic lift cover. And there are other items to remove before you can access the filter. I feel that you will need a shop manual before you tackle this job.

If the hydraulic pump will not pump, after you've determined that the hydraulic reservoir is full, you can prime the hydraulic pump by pulling the test plug on the pump and rigging up a clear plastic line back to the fill port. Start the engine and let it pump until all the air bubbles are expelled.

After you get your lift working, refill the rear reservoir with the lift arms raised.

Could have cut a seal when building it. Could be a bad case. Could be the pressure block/ control valves are bad. Since yours works with little pressure. I would go after the control valves/block

sounds like you are missing coupling to drive pump

Check trim switch

It is a hydraulic pump that applies pressure to the 2 hydraulic pistons to raise & lower the top. So, check for something obstructing movement first.

The convertible top:

• is motor-driven.
• requires parking brake engaged to complete circuit for operation.
• is equipped with a back window glass (42006) . The back window glass is permanently attached to the folding top back window curtain (52500) and cannot be opened.

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VISUAL INSPECTION CHART Mechanical Electrical

• Damaged fluid reservoir.
• Damaged folding top hydraulic cylinders .
• Damaged folding top motor upper and lower hose .
• Damaged convertible top regulator.
• Parking brake not engaged.

• Open power distribution box circuit breaker CONV TOP (30A), fuse junction panel Fuse 1 (15A).
• Circuitry open/shorted.
• Damaged convertible top switch.
• Damaged raise/lower relay .
• Damaged folding top hydraulic lift motor and plate kit .

• Convertible Top Does Not Raise/Lower

• Open circuit breaker or fuse.
• Circuitry open/shorted.
• Damaged folding top switch.
• Damaged raise/lower relay .
• Damaged folding top hydraulic lift motor and plate kit .
• Parking brake not engaged.

don't have 93. here's 94

Motor Assembly, Convertible Top Removal and Installation
NOTE: The folding top hydraulic cylinder rods should be in the fully retracted position.
Use absorbent rags or a container to catch any hydraulic fluid that leaks out when removing the fittings.

1. Remove motor and pump assembly as outlined.

1. Loosen each folding top motor upper and lower hose fitting on the sides of the folding top hydraulic lift motor and plate kit (533A00) .

1. Remove the folding top hydraulic lift motor and plate kit .

1. Remove each of the service folding top hydraulic lift motor and plate kit plugs one at a time and attach the tee fitting to the replacement folding top hydraulic lift motor and plate kit . NOTE: Make sure that the o-ring is installed in the bottom of each folding top hydraulic lift motor and plate kit port before attaching the hose tee fitting.
   

1. Connect the folding top hydraulic lift motor and plate kit unit to a 12-volt power source and cycle the folding top hydraulic lift motor and plate kit in and out several times to purge the air from the folding top motor upper and lower hoses (53390) . Some noise squeal may be noticed due to the air. CAUTION: Do not overfill or the reservoir seal could be blown out.
   

1. Carefully remove the rubber fill plug from the back and the reservoir and check the fluid level. The level should be at the bottom of the filler hole. If necessary, add Synthetic Mercon® Multi-Purpose Automatic transmission fluid E6AZ-19582-B (ESR-M2C163-A2) or equivalent.

1. Replace the fill plug with a new fill plug.

1. To install, reverse Removal procedure.

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Section 01-17: Convertible 1994 Mustang. Workshop Manual
REMOVAL AND INSTALLATION Lift Cylinder, Power Top Removal and Installation
NOTE: The cylinder rods should be in the fully-retracted position.

1. Remove pump and motor as outlined.

1. Remove the upper and lower hose fitting from the folding top hydraulic cylinder (50600) . Use absorbent rags or a container to catch any hydraulic fluid that leaks out when removing the fittings.

1. Remove each of the service cylinder plugs one at a time and attach the hose fittings. NOTE: Be sure each fitting is installed in the correct position on the folding top hydraulic cylinder .
   NOTE: Make sure that the tetra seal is installed in the bottom of each of the folding top hydraulic cylinder ports before attaching the upper and lower hose fittings.
   

1. Connect the folding top hydraulic lift motor and plate kit (533A00) to a 12-volt power source and cycle the folding top hydraulic lift motor and plate kit in and out several times to purge the air from the hoses. Some noise squeal may be noticed due to the air.

1. Carefully remove the rubber fill plug from the back and the reservoir and check the fluid level. The level should be at the bottom of the filler hole. If necessary, add Synthetic Mercon® Multi-Purpose Automatic transmission fluid E6AZ-19582-B (ESR-M2C163-A2) or equivalent.

1. Replace the fill plug with a new fill plug.

1. To install, reverse Removal procedure.

Hey Chris..my name is Keith..and i restore 9N's,2N's and 8N's ..and i can help you with your hydraulic problem...the most probable cause is the hydraulic safety relief valve and i would change that 1st..the part number for it is..8N-638..and they cost about 25 dollars..and to change it..you either jack up the rear axle or you part the tractor down hill..so the hydraulic fluid goes to the front..and then you open up the side cover..that has the dip stick in it and unscrew the Safety relief valve from the hydraulic pump9located on the back side of the pump)..and install a new one..and have plenty of rags..because it is a mess job..and if you dont want to opent that cover again..i would replace the hydraulic control valve..part number 9N-640..is costs about 35 dollars and its on the back side of the pump also..and dont forget to get a new cover gasket and that part number is 9N-4131 and it costs about 1 dollar..i hope this has helped..if not write me back and we will get into the hard stuff on the hydraulic system