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8n 3point

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amishbob

08-16-2006 15:57:01

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I am looking at an 8n the fellow wants 1600.00 for it it has new tires and looks clean and nice but? last month I traded him into a spare 4 foot brushhog and he said it didnt have enough power to pull it and that the 3 point would not hold it in the up position when in gear going down the road.I think the power is due to timing but I dont understand why the 3 points drops down when cruising in gear??

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Jim.UT

08-17-2006 21:09:07

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Re: 8n 3point in reply to amishbob, 08-16-2006 15:57:01

Larry has hit on a very valid point. There are lots of N's out there that work fine as long as the hyd pump is running, but leak down as soon as you push the clutch or turn off the pto. Obviously you would turn off the pto when cruising down the road with a bushhog attached. Therefore if you have a leaky hydraulic system it will not hold while you're cruising down the road.

The solutions seem to be either disconnect the mower driveshaft from the pto for transport so you can keep the pto running (and the hyd pump pumping) or get into the hydraulic system and make it right. A hydraulic system that doesn't leak will hold all night.

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Larry NCKS

08-17-2006 13:09:16

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Re: 8n 3point in reply to amishbob, 08-16-2006 15:57:01

The fellows are right about leaks in the system letting the 3 point down.

However, I have two observations. 1st, limiter chains do not keep the 3 point up. They prevent sway. 2nd no one has told you that there is no hydraulic pressure to the 3 point unless the PTO is engaged and running.

That is one big drawback to the N series - dead PTO and dead hydralics. N series were the last of the Fords NOT equipped with live hydraulics.

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guest

08-17-2006 15:41:02

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Re: 8n 3point in reply to Larry NCKS, 08-17-2006 13:09:16

You may be referring to the sway chains on the
bottom of the PTO.
My limiter chains are from each 3 point yoke down to the point the cat 1 pin
hits the deck. The amount of links determine
the minimum the deck hits the ground.
George

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Tim K

08-17-2006 06:52:17

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Re: 8n 3point in reply to amishbob, 08-16-2006 15:57:01

I have a 4 ft. bush hog on my rebuilt 2n. It pulls it just fine. The reason the lift won't hold up the hog is most likely; the oil pressure relief valve leaking (which can be fixed without taking apart the hydraulics); or a bad piston seal on the 3 point piston. Both of these are pretty cheap fixes, unless the hydraulic cylinder is so shot that you have to buy a new one. Also, there may be too light hydraulic oil in the tractor. Don't use #134 recommended by NH on an older tractor, use the original 90wt. mineral oil or a similar replacement. While the 8n has position control, limiter chains should be used to allow more of the tractor's power to go to the bush hog instead of holding the implement in position. Parts are readily available for these tractors, and 1600 bucks would not be a bad price in my area (NW INdiana).

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guest

08-17-2006 04:08:22

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Re: 8n 3point in reply to amishbob, 08-16-2006 15:57:01

An 8N will not pull a 4 ft hog!
Most people use a 5 ft, and some will even
use a 6 ft.
If it does not have the POWER for a 4, it
is badly tuned up or motor is shot. You must
do a compression test (90 PSI MIN). This is a simple test with a hand held pressure gauge.

If It won't hold up a 4 ft hog the hydraulics need an overhaul.
A 3 point does not need to hold up a hog when
cutting, limiter chains should hold up the
hog. But you will have to raise it over
gravel or other obstructions.

If the compression is low DON'T BUY IT!
It is a parts tractor.
If high, I would reduce the price by $500
to fix the hydraulics. You can fix it
yourself a lot cheaper.

George

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