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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum

Oliver 77 - Belt....

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11-18-2020 17:56:06

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Any tips on how to remove the fan belt- I see no adjustment?

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11-22-2020 06:49:30

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 Re: Oliver 77 - Belt.... in reply to banjoman09, 11-18-2020 17:56:06  
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Having this forum is great. My 51 77 has that same setup and all the responses will be helpful come the time I get to working on that part.

Reminds me of when a teacher or someone doing a presentation telling the audience: If you have a question dont be afraid to ask it because a lot of other people may have the same question.

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11-19-2020 05:30:33

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 Re: Oliver 77 - Belt.... in reply to banjoman09, 11-18-2020 17:56:06  
Loosen the three nuts on the crankshaft pulley, then take a punch and tap it. It should spread open. Then remove the bolts in the fan and set the fan on the shroud. The belt should come right off. Loosen your generator belt too. Makes it easier.

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11-19-2020 05:37:18

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 Re: Oliver 77 - Belt.... in reply to agonair, 11-19-2020 05:30:33  
thank you as I do not have a book yet; my fan belt is good but my generator belt is no good...so I will get it changed !

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J. Schwiebert

11-19-2020 10:22:40

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 Re: Oliver 77 - Belt.... in reply to banjoman09, 11-19-2020 05:37:18  
Get yourself a 5/16 inch headless set screw or cut the head off of a bolt. Before you take all the bolts from the fan and pulley off screw that in one of the bolt holes. That way it will be easy to align the holes in both pulleys and the fan to help in assembly. Questions? J.

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11-19-2020 17:31:53

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 Re: Oliver 77 - Belt.... in reply to J. Schwiebert, 11-19-2020 10:22:40  
Very good idea....thank you.

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11-18-2020 18:47:49

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 Re: Oliver 77 - Belt.... in reply to banjoman09, 11-18-2020 17:56:06  
The 77 I had years ago had a pulley that 1/2 was movable to loosen/tighten the belt. Should be some hardware to loosen so the movable half can be spun on the slotted ramps for adjustment.

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11-19-2020 04:03:50

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 Re: Oliver 77 - Belt.... in reply to Dieseltech, 11-18-2020 18:47:49  
The lower pulley has three small bolts circumventing the pulley that can be loosened to allow the outer half of the pulley to rotate away from the other half. That allows the belt to be loose enough to be removed and a new belt installed. Then reverse the process to tighten the belt. It will need to be readjusted after it has been run awhile. You will see three small holes in the outer pulley you can use a long punch to tap the pulley in one direction or the other.

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11-19-2020 05:38:04

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 Re: Oliver 77 - Belt.... in reply to ziffel, 11-19-2020 04:03:50  

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