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new Ford 640

grandpa Love

grandpa Love

Well-known Member
Got the tractor running smoothly yesterday, carb adjust,and good battery.when we bought it it didn't have a battery,seller jumped it off and it was running - poorly- off alternator. Rear axle seals are leaking. After looking through the archives here it looks like a tough job to fix these.can anyone share their thoughts on it? I have the manuals, which help. But not clear on how to remove axle. Then the collar? Help!! Thanks.
 
The PTO seal repair is one of the easier repairs on these, but the rear axle bearing collar removal is not. There's been posts in the ford forum on methods used to remove and replace. Its a must do if you want the brakes at their best on these, given they were not the best when new. Oil may impregnate the friction material on the pads. In good working order, they have worked well on the hills around here. The water in the trans may be from a leaky shift lever boot. These tractors also seem to take on a lot of condensate. I have an 850 that sat covered 2/3 - 3/4 with a decent tarp and bungy cords, air flowing easily underneath and the crankcase was loaded with so much water that it froze up during the winter and the stick read no oil. It warmed up and I was able to drain a bunch out of it before replacing the oil. This tractor had all the fluids replaced and I will bet all 3 compartments will need to be drained of water now. Its amazing how much condensate will accumulate over time. My 640 is sitting covered in the same way, next in line to get worked on, but I'll bet it's got water to drain off as well.
 
Running off the alternator is not good for the alternator and humans for that matter since if one where to touch the wrong thing at the right time you could end up 6 foot under due to electrocution. When yo run something off the alternator with no battery the VR sees a dead battery and put out max AMPS AND VOLTS AND THE AMPS ARE WAY MORE THEN IT TAKES TO KILL AND ALSO THE VOLTS CAN GO UP TO 90 PLUS AND THAT FRIES THE ALTERNAOTR.

So good chance the alternator is now bad and likely to will need to be replaced of you will fry the batteries
 
Wonder how much water is in the transmission? Possibly enough that the oil level is way high?

You might want to try cleaning out the gear cases, get the oil level where it belongs, drive it a while, see if the seals leak will dry up.

That will also give you a chance to find any other problems. Then when you do go in for repairs, you can do everything that is needed in one tear down.
 
I wondered about that. If fluid is way over full and causing leaks. I'm planning to sell this tractor fairly quick and wanted it in good shape for the folks buying it. May drain everything tomorrow and see what we find.
 
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