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Re: 64 Ford 4000 overheated and blew rad cap off
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Maybe undo the fan belt.
See if the water pump bearings failed and the fan now has some slop in it. Maybe that's why it's pulled down into the frame.
That would be best case scenario, from what it looks like. The bearings fail, the fan shaft gets loose, the fan hits the frame and now the belt slips, no fan, no water pump, engine overheats.
If the water pump bearings and fan are still straight and tight, then look at the axle pin. That could easily be worn, especially if you're using a bucket heavily. A worn or broken axle pin could change the position of the engine block and fan, relative to the frame.
What I don't know is how any of that changes when you have that front mount hydraulic pump.
I'm not sure if that pump's shaft goes through where the axle pin used to go... or if you will have a pump shaft and an axle pin. That's where the old time ford mechanics here in the forum and your manual should be able to help you out.
What I do know is that I've read more than a few posts here about how hard that axle pin, king pin, whatever you want to call it, can be to get out. I also remember that the failure mechanisim for when that goes is just like you describe. Instant damage to the fan/radiator/cooling system.
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