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53 Jubilee w/questionable Vane Pump

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Mike NAA36663

11-10-2000 18:58:35




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Recently bought a '53 Jubilee with a front end loader. Tractor sat for 4 years because of a bad vane pump. Previous owner had pump rebuilt, but did not install it on the tractor. (Price was lower if I did it myself, I'm beginning to understand why!!). Also had a second pump, in pieces, plus parts from the rebuild, but I'm not sure exactly what was replaced. I installed the rebuilt pump, changed the hydraulic oil (134D), and replaced the o-rings at both ends of both hydraulic lines between the pump and reservoir. Loosened the return line at the pump (Smaller line). Started tractor, no oil from pump. Per the shop manual, put compressed air into the dipstick hole to help prime the pump. After about 30 secs, oil began dribbling out the pump. Oil stopped dribbling when I stopped the compressed air. I assume that has isolated the problem to the vane pump? I've dissassembled the pump and it appears to be okay. Besides maybe a new shaft seal and o-rings inside the pump just to be sure, what else can I try? I saw something in the archives about a procedure to test the pump itself, but I can't find it now. Am I even on the right track?

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Dave

11-11-2000 22:12:26




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 Re: 53 Jubilee w/questionable Vane Pump in reply to Mike NAA36663, 11-10-2000 18:58:35  
Mike, There could be several reasons why your pump doesn't work. The first one is that when it was rebuilt the ring position is in the wrong direction of rotation. The ring can be rotated for either a right or left hand rotation. Second, did you check to make sure there wasn't any restriction at the intake pipe in resorvoir. Third, your relief valve could be stuck open, not sure if your pump has an internal valve. Hope this will help

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ken

11-10-2000 19:35:04




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 Re: 53 Jubilee w/questionable Vane Pump in reply to Mike NAA36663, 11-10-2000 18:58:35  
You may wish to go to the left side of the N-board, select Tractorlinks.com, then Select Ford, then select Vintage Ford Tractor Resource, then select hydraulics. HTH



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Mike NAA36663

11-12-2000 18:50:00




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 Re: Re: 53 Jubilee w/questionable Vane Pump in reply to ken, 11-10-2000 19:35:04  
Dave and Ken -Thanks for the great advice. The Vintage Tractor Resource link confirmed the pump as definitely the problem. I dissassembled and reassembled the pump at least half a dozen times, each time changing parts with spares that I had that also looked good. No luck until I installed the rebuilt 'guts' into the other pump housing. That combination of parts finally worked - the hydraulics work great. Your advice kept me on the right path, not diverting into some other area of the hydraulic system.

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