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Discussion Forum
Show Parts for Model:

'48 B Oil Pressure (or lack thereof)

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Joe Cook

04-20-2000 10:03:14
207.234.3.66



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I recently bought a '48 B that runs nicely, but has no oil pressure. No oil runs out with the gauge removed. The filter and lines are clean back to the pipe coming out of the rear of the engine. If the intake is not clogged or leaking, it sounds to me like the oil pump. Is this a common problem? Does the tractor have to be split to replace the oil pump? I have seen another B with a jury-rigged external oil pump made from an automotive power steering pump. Are replacement oil pumps available?

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Rob in MO

04-20-2000 13:27:23
209.106.42.134



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 Re: '48 B Oil Pressure (or lack thereof) in reply to Joe Cook, 04-20-2000 10:03:14  
before all that, you should try to re-prime the pump by removing the filter and squirting some oil down the hole. Use enough to be sure the entire line and pump would be full. Also, make sure the little 4 or 5" tube is pressed into the filter housing and goes up into the filter. I threw mine away on 2 different tractors when changing the filters (like a fool.) because I didn't know they were supposed to be there. I hope priming helps, cuz the alternative sounds like a DRAG!! Good luck with it, RC

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Joe Cook

04-21-2000 15:46:57
209.214.112.178



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 Re: Re: '48 B Oil Pressure (or lack thereof) in reply to Rob in MO, 04-20-2000 13:27:23  
Rob, You the Man! Priming the pump worked. I now have 12-20 pounds of oil pressure. I guess the old gal just had a dry throat. If she loses prime, I will have to figure out how many times I can prime her before it's the same amount of trouble as splitting the torque tube...I suspect it will be a lot of priming.



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Dick L

04-20-2000 11:00:16
204.246.233.235



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 Re: '48 B Oil Pressure (or lack thereof) in reply to Joe Cook, 04-20-2000 10:03:14  
Yes, you will have to split the engine from the torque tube. the pump mounts to the back of the engine with three bolts, You might need a new or rebuilt pump, but the oil pump is driven with a pin through the cam shaft. I have seen this pin wore through. Most of these pumps can have the cover resurfaced and then work fine. After you split the tractor and remove the oil pump it will not be hard to see what your problem is. If the pin is broke you will have to remove the cam shaft. To support the engine I take the valve cover off and use the valve cover bolts to fasten a chain and use an engine lift. I use a jack stand to support the torque tube. It's not that big of a job. You will use up most of a day if you have every thing you need before you start.
Good luck and ask for help as needed.

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