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Re: fan and clutch assembly
It is regular threads. You need to use a strap wrench to hold the pulley. Or make one by using a old leather belt. Just wrap the belt around the pulley. Put one end through the belt loop in the opposite direction.
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If you're referring to removing the fan/fan clutch. Put the bolts in the pulley back in, put the belt back on. Get a long chisel and give the nut one good shot with a hammer. (it's reverse thread) And then spin it off.
ur supposed to unscrew the fan at that big nut and remave the cooling fan shroud first then youll have all kinds of room. snug the pump back to the motor and break that nut loose. i always use an air hammer and chisel in the left of the top flat on the nuts, it starts it in the right direction and then un threads easy. you have to hold the pump pulley and turn that big *** nut. you can borrow tools from parts store for it if you dont have anything
A Clutch FAN Requires the 4 Nuts/Bolts @ the Pully Bunched up in the Center Behind the FAN & In Front of Water Pump, Once Assmbly is Removed there are 4 BOLTS that Fasten the (FAN) to the CLUTCH assembly. It is Wise th REPLACE BOTH FAN & FAN CLUTCH ASSEMBLY AS A SET
SPECIAL SERVICE TOOL(S) REQUIRED
Fan Clutch Holding Tool
Fan Clutch Nut Wrench
CAUTION: The large clutch assembly nut has a right-hand thread and must be rotated counterclockwise to remove it.
Remove the fan clutch (8A616) from the water pump (8501) by turning the large nut, which is part of the fan clutch, using Fan Clutch Holding Tool T84T-6312-C and Fan Clutch Nut Wrench T93T-6312-B.
Remove two screws retaining fan shroud.
Remove the fan blade (8600), fan clutch and shroud.
If the fan blade and fan clutch have to be separated, remove the remaining bolts attaching the fan blade to the fan clutch
5.0L, 5.8L and 7.5L Engines Removal
Remove screws retaining fan shroud (8146) to radiator (8005).
Remove four screws retaining clutch on water pump hub.
Pull fan clutch and fan blade off water pump pilot and remove fan clutch, fan blade and shroud from vehicle.
Remove four screws and separate fan clutch from fan blade.
Water Pump Pulley
Screw and Washer Assembly, 5/16-18 x .62 Hex
Fan Blade (5.0 and 5.8L)
Fan Blade (7.5L)
Screw and Washer Assembly, 5/16-24 x .88 Hex
16-24 Nm (12-18 Lb-Ft)
The big nut is part of the fan it threads on to the water pump. To remove loosen two of the pulley bolts put a pry bar between these two bolts the use a large wrench on the big nut to thread the fan off the pump. righty tighty, lefty loosey. They also make tools for removing the fan clutch.
The big nut spins counter clock wise. you have to put your pulley bolts back on and make sure they are tight. leave belt on so that you have more resistance to pull against when tring to loosen the nut put a bar inbetween the pulley bolts so it won't slip off and then loosen that big nut looking thing and you should have it from there. to the same thing in reverse order to install it