Which engine is in your Ranger? Makes a difference on directions.
Here are directions:
Disconnect the negative battery cable.
Drain the cooling system
Fig. 5: ... and the fan shroud from the vehicle
Remove the fan and fan clutch assembly.
See Bottom for Fan Clutch Removal
Remove the lower radiator hose from the water pump.
Loosen the water pump pulley attaching bolts.
loosen the alternator mounting bolts and remove the belt. On vehicles with air conditioning, remove the tensioner pulley, alternator and bracket.
remove the A/C compressor and power steering pump mounting bracket, without disconnecting the lines, and set off to the side.
Remove the water pump pulley.
Disconnect the heater hose at the pump.
Remove the attaching bolts and remove the water pump.
Clean the mounting surfaces of the pump and front cover thoroughly. Remove all traces of gasket material.
Apply adhesive gasket sealer to both sides of a new gasket and place the gasket on the pump.
Position the pump on the cover and install the bolts finger-tight. When all bolts are in place, torque them to 72-108 inch lbs. (8.5-12 Nm).
Install the pulley.
On vehicles with air conditioning, install the alternator, bracket and tensioner pulley.
Install the A/C compressor and power steering pump mounting bracket.
Install and adjust the drive belt.
Connect the hoses and tighten the clamps.
Install the fan and clutch assembly.
Fill and bleed the cooling system.
Connect the negative battery cable, then start the engine and check for leaks.
FAN CLUTCH REMOVAL:
See Figure 3 through 7
Fig. 3: Exploded view of the engine fan for the 4.0L engine
Fig. 4: Before attempting to unfasten the engine fan, check the fan shroud for indications of normal or reverse threads
Fig. 5: Remove the air intake tube. You will need these specialized tools to unfasten the fan clutch nut
If necessary, remove the air cleaner outlet tube.
According to the manufacturer, the nut uses LH threads and is loosened clockwise.
Using Fan Clutch Pulley Holder T84T-6312-C and Fan Clutch Nut Wrench T84T-6312-D, or their equivalents, loosen the large nut attaching the clutch to the water pump hub.
Fig. 6: Using the special tools, loosen the fan clutch nut in the direction indicated on the shroud.
Some models have enough room between the shroud and the engine to remove the fan without unbolting the shroud.
Remove the two upper fan shroud retaining bolts. If the overflow hose is routed through the fan shroud, remove it from the shroud.
Lift up on the fan shroud to disengage the lower mounting clips.
Fig. 7: Remove the fan and clutch assembly from the vehicle
Remove the fan/clutch assembly and the fan shroud together.
If necessary, remove the fan-to-clutch bolts to separate the fan from the clutch.
This is a Paysite
Fan and fan clutch removal was at bottom of directions. Here they are again.
See if this looks like yours:
Not sure what to tell you, that image is straight out of 1994 Ford Ranger service manual