Pump won't fill with hydraulic oil

Which power steering system does your vehicle have ? EPS - electric power steering or hydraulic power steering . Do you have a EPS light lit on the instrument cluster ?

Power Steering System Description and Operation (EPS)
The power steering system reduces the amount of effort needed to steer the vehicle. The system uses the powertrain control module (PCM), body control module (BCM), power steering control module (PSCM), discrete battery voltage supply circuit, steering shaft torque sensor, steering wheel position sensor, power steering motor, driver information center (DIC), and the serial data circuit to perform the system functions. The PSCM and the power steering motor are serviced as an assembly and are serviced separately from the steering column assembly. The steering shaft torque sensor and the steering wheel position sensor are not serviced separately from each other or from the steering column assembly. The steering column assembly does not include the power steering motor and module assembly.

Power Steering System Description and Operation (HPS)
The hydraulic power steering pump is a constant displacement vane-type pump that provides hydraulic pressure and flow for the power steering gear. The hydraulic power steering pumps are either belt-driven or direct-drive, cam-driven.
The power steering fluid reservoir holds the power steering fluid and may be integral with the power steering pump or remotely located. The following locations are typical locations for the remote reservoir:
• Mounted to the front of the dash panel
• Mounted to the inner fender
• Mounted to a bracket on the engine
The 2 basic types of power steering gears are listed below:
• A recirculating ball system
• A rack and pinion system
In the recirculating ball system, a worm gear converts steering wheel movement to movement of a sector shaft. A pitman arm attached to the bottom of the sector shaft actually moves one tie rod and an intermediate rod move the other tie rod.
In the rack and pinion system, the rack and the pinion are the 2 components that convert steering wheel rotation to lateral movement. The steering shaft is attached to the pinion in the steering gear. The pinion rotates with the steering wheel. Gear teeth on the pinion mesh with the gear teeth on the rack. The rotating pinion moves the rack from side to side. The lateral action of the rack pushes and pulls the tie rods in order to change the direction of the vehicle's front wheels.
The power steering pressure hose connects the power steering pump union fitting to the power steering gear and allows pressurized power steering fluid to flow from the pump to the gear.
The power steering return hose returns fluid from the power steering gear back to the power steering fluid reservoir. The power steering return line may contain an integral fin-type or line-type power steering fluid cooler.
In a typical power steering system, a pump generates hydraulic pressure, causing fluid to flow, via the pressure hose, to the steering gear valve assembly. The steering gear valve assembly regulates the incoming fluid to the right and left chambers in order to assist in right and left turns.
Turning the steering wheel activates the valve assembly, which applies greater fluid pressure and flow to one side of the steering gear piston, and lower pressure and flow to the other side of the piston. The pressure assists the movement of the gear piston. Tie rods transfer this force to the front wheels, which turn the vehicle right or left.
© 2019 General Motors Corporation. All rights reserved.

steering rack or gear . 2X2 - 4X4 engine . Depends on steering system .
When you turn the steering wheel, the steering gear rotates the pitman arm which forces the relay rod to one side. The tie rods connect to the relay rod with the ball studs. The tie rods transfer the steering force to the wheels. Use the tie rods in toe adjustments. The tie rods are adjustable. The pitman arm support the relay rod. The idler arm pivots on a support attached to the frame rail and the ball stud attaches to the relay rod.
The 2 tie rod are threaded into the tube and secured with jam nuts. Right and left hand threads are used in order to permit the adjustment of toe.

Binding linkage , steering gear worn etc....

Power Steering System Description and Operation (w/o Electro-Hydraulic Steering)
The hydraulic power steering pump is a constant displacement vane-type pump that provides hydraulic pressure and flow for the power steering gear. The hydraulic power steering pumps are either belt-driven or direct-drive, cam-driven.
The power steering fluid reservoir holds the power steering fluid and may be integral with the power steering pump or remotely located. The following locations are typical locations for the remote reservoir:
• Mounted to the front of the dash panel
• Mounted to the inner fender
• Mounted to a bracket on the engine
The 2 basic types of power steering gears are listed below:
• A recirculating ball system
• A rack and pinion system
In the recirculating ball system, a worm gear converts steering wheel movement to movement of a sector shaft. A pitman arm attached to the bottom of the sector shaft actually moves one tie rod and an intermediate rod move the other tie rod.
In the rack and pinion system, the rack and the pinion are the 2 components that convert steering wheel rotation to lateral movement. The steering shaft is attached to the pinion in the steering gear. The pinion rotates with the steering wheel. Gear teeth on the pinion mesh with the gear teeth on the rack. The rotating pinion moves the rack from side to side. The lateral action of the rack pushes and pulls the tie rods in order to change the direction of the vehicle's front wheels.
The power steering pressure hose connects the power steering pump union fitting to the power steering gear and allows pressurized power steering fluid to flow from the pump to the gear.
The power steering return hose returns fluid from the power steering gear back to the power steering fluid reservoir. The power steering return line may contain an integral fin-type or line-type power steering fluid cooler.
In a typical power steering system, a pump generates hydraulic pressure, causing fluid to flow, via the pressure hose, to the steering gear valve assembly. The steering gear valve assembly regulates the incoming fluid to the right and left chambers in order to assist in right and left turns.
Turning the steering wheel activates the valve assembly, which applies greater fluid pressure and flow to 1 side of the steering gear piston, and lower pressure and flow to the other side of the piston. The pressure assists the movement of the gear piston. Tie rods transfer this force to the front wheels, which turn the vehicle right or left.


Your best bet , take it to a qualified repair shop.

If you are not hearing any noise coming from the wheel motor on the left side and you fluid level is good you have two choices to chose from. One, raise the rear wheels and put it on jack stands. Run the units wheels forward and reverse for about five times each and then try it again. If this works, you just bled the hydraulic system of air. If this did not work, you need to have the left pump flow tested at your nearest shop and most likely you will have to replace the pump. Hope this helps. P.S. When was the last time you changed the hydraulic fluid and filter? George

Clutch hoses are a known weak link...
use a quality hose when replacing them , or a flow control valve...
Disconnect the top ( reserviore side) first .Then disconnect the lower side (flow control input / slave cyl.).
replace the top with new hose .
and then the bottom side... fill with fluid and pump the clutch NO MORE THAN 1/4 way down each stroke... to clear the air in the line.

There must be a hydraulic fluid leak somewhere. Check to see if there is oil filler cap on your hydraulic pump located in the trunk compartment. Fill if necessary with just enough fluid to raise the top. The reason it won't go up is cause it is lacking pressure from the low fluid

I read someplace the hydraulics use the engine oil. I have the same question. It looks like the hydraulic pump is located at the right hand side of the engine block, forward and is connected to it. Although the previous owner of my tractor used hydraulic fluid.

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.

-------------------------------------------------------------------------------------------------------------------------------
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.

Almost all power convertible tops are electric over hydraulic. The ecectric motor runs a hydraulic pump. The pump pushes fluid to the cylinders that work the top. Most are located behind the rear seat backrest. Either remove the rear backrest or access the motor/pump from the trunl. It will be shaped like a cylinder. At one is the electric motor, at the other end is the hydraulic reservoir. At the end of the reservoir is a rubber plug. With the top down, remove the plug and fill it with tran fluid till it over flows. replace the plug and cycle the top up and down as far as it will go. Repeat the process till it will take no more fluid. A turkey baster with a piece of vacuum line makes a good filler tool. With that said, you must find the leak. You may have a leaking pump, hydraulic line or cylinder. RNever replace one line. Do them all. Always replace cylinders in pairs.

Good luck, Karl at aoksales.com

caseih hytran fluid is used for hydraulics and transmission fill through plate on top of deck next to shifter check plug is located on left side of transmission housing next to clutch linkage rod probably square headed pipe plug

hydraulic fill is on the left side below the gas tank in front of the hydraulic valves square plug oil level 1/2 inch below plug