replace fan belt 8n

NanaDeb62 · Dec 24, 2010

How do we remove and replace the fan belt for our 49 Ford 8N? Can we do it or do we have to take it to someone?

wwildhorse2k · Dec 24, 2010

You can do it yourself. The tensioner for the belt is the alternator or generator. Loosen the generator or alternator and take the belt off the pulley. work the belt off the crankshaft pulley. turn the fan and work the belt off the fan ( water pump) pulley.

Mike Groom · Dec 24, 2010

It's a simple operation you can do yourself,just loosen the generator adjustment bolt and push the gen.in toward the engine and take the belt off the pulley,the hardest part is getting the belt out from under the bottom pulley and back under it again,put it back on all the pulleys like it came off and tighten the gen. adjusting bolt and you're good to go.

ericlb · Dec 24, 2010

nana, its pretty easy, assuming the 8n is original with a 6v generator, loosen the bolts that bolt the generator to its mounting brackets, then push the generator towards the engine as far as it will go, remove the belt from its pulley, then work it off the fan by rotating the fan by hand, let it drop from the bottom of the crank pulley, [ if it hasnt already by now] and its off, install the new one the same way, make sure to tighten the generator so there is about 1/2 inch of slack in the belt up and down, measured at a point midway between the pulleys

Bob · Dec 24, 2010

Is there a loader on it? (If there is, and it has a front-mounted hydraulic pump the driveshaft for the hydraulic pump has to be removed to allow the belt to be removed/replaced.)

NanaDeb62 · Dec 24, 2010

Wow there sure isn't much room under there to get that belt off and on that bottom pulley..you're talking about an 8N right?? That's what it is.

NanaDeb62 · Dec 24, 2010

There is a loader on it and a front mounted hydraulic pump. There is no room between the pulley and the front axle pivot

NanaDeb62 · Dec 24, 2010

There's no room to slip that belt on and off! Are we talking the same tractor? My hubby is sure we can't do it...but I'm determined to find a way if we can...

Dell (WA) · Dec 24, 2010

Nana.......didja know that there are replacement belts that look like BIG plastic bicycle chains??? And after you CUT yer OLDBELT you can pullet out. Then its just matter of fishing the NEW CHAIN belt under the crankshaft pulley and adjusting the number of links so you can do the final tightening with the genny/alternator adjustment. Simple, eh?

Otherwize you haffta remove the FEL pump driveshaft to fish a 1-piece belt under the engine crankshaft pulley. Not hard but takes some time futtzzin around the FEL arms an stuff.

You'll haffta search around for the 1-size fittz-awl plastic chain fanbelt. NAPA??? ......HTH, Dell the un-chained

R Geiger · Dec 24, 2010

They are called a vibration proof belt and can be gotten at Harbour freight

Caryc · Dec 24, 2010

(quoted from post at 18:47:46 12/24/10) There is a loader on it and a front mounted hydraulic pump. There is no room between the pulley and the front axle pivot

I have a Davis loader on mine 8N with a front mount pump. I had to remove the pump to get the new belt on. As I remember, it wasn't that big of a job. Just remember the pump shaft is held on with left hand threads.

Kind of a pain in the a$$ but doable. I have a 14" bandsaw that I put one of those linked belts on to reduce vibration. Worked like a charm.

But I'd still rather run a solid belt on the tractor. As I said even with the loader pump anybody should be able to do it.

Caryc · Dec 24, 2010

The edit function is not working here so I had to put this in another post.

You won't need to unhook any hydraulic lines. Just undo the pump from the base and pull it forward a bit, maybe wire it out of the way. Then undo the coupler so you can get out that bolt that screws into the drive shaft. Remember the left thread.

TheOldHokie · Dec 24, 2010

(quoted from post at 23:15:17 12/24/10) The edit function is not working here so I had to put this in another post.

You won't need to unhook any hydraulic lines. Just undo the pump from the base and pull it forward a bit, maybe wire it out of the way. Then undo the coupler so you can get out that bolt that screws into the drive shaft. Remember the left thread.

Not all loader pumps use the lefthand thread setup. Many use a splined shaft that can simply be withdrawn. In my experience the splined setup is more common than the left hand thread hub.

TOH

Del Huebner · Dec 25, 2010

Would you happen to know if the Wagner loader pump is a spline or the left handed threads?

TheOldHokie · Dec 25, 2010

(quoted from post at 09:50:12 12/25/10) Would you happen to know if the Wagner loader pump is a spline or the left handed threads?

It could be either. You can tell which it is by inspecting the hub on the crankshaft end of the shaft.

If the hub appears to be on the end of the drive shaft and has 4 pins sticking out that engage rubber bushings in the face of the pully it is a left hand thread on the shaft. You must unscrew the hub from the shaft and withdraw the shaft out the front. Then the hub can be liffted out vertically.

If the hub appears to be bolted to the crankshaft pully with 4 bolts the shaft is a splined fit in the hub and it can simply be pulled out towards the front.

HTH,

TOH

NanaDeb62 · Dec 25, 2010

Where can I get one of those replacement belts? Tried looking at Harbor Freight, didn't find anything.

ericlb · Dec 25, 2010

sorry i did not realize there was a loader on the tractor, i had just changed the belt on a 8n that very afternoon, but it doesnt have a loader, you can still do it yourself though, the guys here have told you how,

Del Huebner · Dec 25, 2010

TOH, Thanks for the great explanation, now I know what to look for. Have a Merry Christmas. Del

Al P · Dec 25, 2010

I have a Wagner loader on my 8N and had it off as recently as a year ago. I know for certain that the hydraulic pump drive shaft on my Wagner loader has a left hand thread.

Al P · Dec 25, 2010

If you prefer to use a solid belt and you have a Wagner loader on your 8N, this is what it takes to remove the hydraulic pump drive shaft:
First, there are two bolts located on the bottom of the pump used to adjust and hold the pump in place. Loosen these bolts.
Second, take the nuts off of the two bolts that connect the pump shaft to the drive shaft and slide the pump forward, away from the drive shaft.
Finally, keeping in mind that this is a left hand thread, remove the drive shaft from the disc that is driven by the crank shaft pulley.
After installing the new belt just reverse the process to re-install the pump.
FYI - You can get a copy of the Wagner loader manual if you visit the Wagner web site. They no longer manufacture of service the loaders but they do have an electronic copy of the manual that they are kind enough to make available to us. I found it last year when I did some work on mine. If you have trouble locating it let me know and I'll try to re-trace my steps and give you more specific instructions.
Good luck.

NanaDeb62 · Dec 25, 2010

Ok, here we go. He is actually working on this today. Deerborn loader on the tractor. The coupling on the crankshaft pulley is the issue. So there's no way to put belt on the pully. How do I deal with that? There must be something we're missing here.

NanaDeb62 · Dec 25, 2010

"Simply" seems to be beyond hubby today. He has the splined (spelling?) There doesn't seem to be room to get the bolts out? The front axle pivot seems to be in the way..does this help to help us? Sorry to be such a pain...haha

replace fan belt 8n

New User

Member

Well-known Member

Well-known Member

Well-known Member

New User

New User

New User

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Member

Well-known Member

New User

Well-known Member

Member

New User

New User

New User

New User

Similar threads