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Ford 9N Hydrolic pump question

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Eric Constantin

08-13-2001 09:53:19

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Quick quesion to anyone who might know. I am new at this and I am helping my dad repair this tractor, but need some information.

We need to replace the fan belt, upon trying to disconnect the front mounted hydrolic pump for a dearborn loader, we found out the pump was frozen, the the front collar that mounts into the engine assembly is a 4 pronged assembly that fits in the engine.....here is the question.....how does this 4 prong assembly fit on the shaft that mounts with the hydrolic pump....does it have a key fitting or is it another way.....we couldn't get it off, so we soaked it with WD-40....my Dad seems to think that it has a key fitting, but was not able to obtain any information on this.....any information would be great....Thank you very much

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08-13-2001 14:03:52

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 Re: Ford 9N Hydrolic pump question in reply to Eric Constantine, 08-13-2001 09:53:19  
Some of the four pronged drives were in fact keyed and had a bolt in the end of the four pronged adapte that goes into the front pulley. Unfortunately lots of the time they will have been welded because of the keyway giving up the ghost and slipping around the shaft. If this is the case the hood and tank will have to be removed and then the front end and radiator so that the adapte/drive shaft came be removed out the back of the axle support.

I don't think though that the shaft would have to come out to remove the pump. The other end of the shaft should be splined so it will pull out of the pump. Might try the penetrant at the front of the pump and them use two prybars to try to get the pump to release the shaft.

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Errin OH

08-13-2001 11:17:43

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 Re: Ford 9N Hydrolic pump question in reply to Eric Constantine, 08-13-2001 09:53:19  
I have seen the shaft screwed in (reverse / left handed threads) the plate bolted to the lower pulley. I had to block the engine to unscrew it. Good luck - Errin

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