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51 8N v-belt

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Rob

06-12-2003 18:13:50




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I haven't picked up the shorter belt for my tractor yet but I did remove the genny and take a hard look at the mount and all the pulleys. Now I have another concern.
The genny and water pump pulleys are inline but they don't line up with the crank pulley. The crank pulley is out front something like half the belt width which would be around 5/16".
There is a 1/4" gap between the back of the crank pulley and the timing gear cover. Don't have that gap on my 2N. I spose you 8Ner's don't have that gap on your tractor either, huh? Appreciate if you check.
Still won't explain the difference in belt length though.

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Salmoneye

06-13-2003 03:47:24




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 Re: 51 8N v-belt in reply to Rob, 06-12-2003 18:13:50  
My 1948 8N has no 'offset'...

All pulleys are in line...

HTH

PS.....You said yesterday that the 45 inch belt left you no room for 'adjustment'...What or where exactly are you binding?..When I loosen my hold down bolts on my genny and remove the belt from the pulley, the genny falls all the way to the right without help...Can not imagine where you are hitting that does not allow you to get that belt tight...

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Rob

06-13-2003 04:04:32




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 Re: Re: 51 8N v-belt in reply to Salmoneye, 06-13-2003 03:47:24  
Nothings binding. The adjustment is just all used up with a 42 1/2" belt. The genny swings the full length of the adjustment just fine. At one extreme its laying on the oil filler cap at the other it's up against the block.
You have a front mount. Thats a different timing gear cover. I'm sure you don't have that 1/4" gap between the crank pulley and the timing gear cover. I think I need to get in there to see why the crank pulley isn't closer to the timing gear cover.
Still doesn't take care of the belt length though.

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Dell (WA)

06-13-2003 07:12:22




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 Re: Re: Re: 51 8N v-belt in reply to Rob, 06-13-2003 04:04:32  
Rob..... ...I think that if'n you'll look closely, there is a locating pin in your 6 volt sidemount genny that supposta be in a locating socket in your swinging genny saddle. That'll line up your pulleys. You may run into your oil filter cap with backend of genny when correctly pin located. Wrong oilfilter cap..... ....Dell



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Rob

06-13-2003 08:23:46




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 Re: Re: Re: Re: 51 8N v-belt in reply to Dell (WA), 06-13-2003 07:12:22  
Yep. The saddle is in the locating pin and the genny pulley lines up with the water pump pulley. With the bolt in the adjustment slot of the genny bracket and all they way out against the end of the adjustment slot that 42 1/2" actually-measured-on-the-outside-of-the-belt is just loose. No more adjustment in the slot. Only way it hits the oil filler cap is when I remove the bolt in the adjusting slot and let the genny swing wide.
I can live with a shorter belt, no big deal. Just wonder why. Want to be sure it isn't indicating a real problem.
A real deal might be why the crank pulley has that 1/4" gap to the timing cover. Something isn't right with that. That pulley doesn't line up with the other two. When I get into that maybe I'll discover why I'm using a shorter belt. Dunno.

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oh . . . Dell (WA)

06-13-2003 11:43:00




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 Re: Re: Re: Re: Re: 51 8N v-belt in reply to Rob, 06-13-2003 08:23:46  
Rob..... ....oh, its your cranshaft pulley thats not lined up. Seems to me, that theres is about 1/4" inch of half-moon key overlap that couples the cranshaft to the crankshaft pulley. You'd need to remove the crankshaft pulley (which should be torqued to 150 ft/lbs) to inspect. Tip: stick some soft 1/4" rope down any sparkie hole and then your crank pushes a piston up against the rope and you can torque'er off or on. BTW, the crankshaft crownhead bolt uses 1 5/16 socket..... ....Dell

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Lee

06-13-2003 14:13:39




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 Re: Re: Re: Re: Re: Re: 51 8N v-belt in reply to oh . . . Dell (WA), 06-13-2003 11:43:00  
Dell you amaze me !! I've been bustin' knuckles on one thing or another for over 35 years and I'd never heard the 1/4" rope down the plug hole trick before. My hat's off to you, sir, Lee



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Rob

06-13-2003 13:50:51




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 Re: Re: Re: Re: Re: Re: 51 8N v-belt in reply to oh . . . Dell (WA), 06-13-2003 11:43:00  
Yeah boy, that's a job. You remembered me that clothsline trick a few days ago in another post.
Hey, I've supervised mechanics and machinists for decades and my experience is that the only way some of those guys will ever look at a manual is if they know their job and livlihood depends on it. Some guys will follow dang-fool advice from strangers before they will ever look at a manual.
One other thing, you have any tips on setting a bearing preload in the 8in/lb-14in/lb range without a torque wrench in that range. Mine only goes down to 30in/lb. This is on a car's rear end. The local Ford shop doesn't have a tool either. Their guy sets it up just by "feel." My 'feel' has never been calibrated to that range.

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Is sidemount diff? Rob

06-12-2003 18:20:11




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 Re: 51 8N v-belt in reply to Rob, 06-12-2003 18:13:50  
Mine's a sidemount with a different timing gear cover then the front mount.



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