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JDA witout Oil Pressure...

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Leland

08-25-2000 09:59:28




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Dad and I have a great ole '49 A, which we spent the last two summers restorting. Here is the problem. We started it the other day...no oil pressure. After removing the gage, we found that oil didn't even make it through the tube into the gage. What do we do? Our restoration was fairly basic, and we didn't fool too much with the engine....just sheet metal work. Any advice would be appreciated.
Thanks

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Leland

08-28-2000 13:45:21




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 Re: JDA witout Oil Pressure... in reply to Leland, 08-25-2000 09:59:28  
Thanks for everyone's advice. I'll be getting pretty oily next Saturday. Thank's to all your help...I know where to start looking...



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KH

08-25-2000 20:30:24




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 Re: JDA witout Oil Pressure... in reply to Leland, 08-25-2000 09:59:28  
Before running it anymore I would belt it to another tractor when checking the oil pressure. You can turn it over that way with a lot less strain on the engine if it isn't oiling.



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DAve K.

08-25-2000 14:24:14




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 Re: JDA witout Oil Pressure... in reply to Leland, 08-25-2000 09:59:28  
My 1948 A started having low and erratic oil pressure. Found the screen, inside the crankcase at the bottom of the pump, had become clogged with a rather sticky sludge. I never use detergent oil in the old engines so I guess it just sludged up over the years. Removed it and cleaned and been okay since.

Dave



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Dan

08-25-2000 12:10:46




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 Re: JDA witout Oil Pressure... in reply to Leland, 08-25-2000 09:59:28  
My JDA also lost pressure last year. The problem was the connector sleeve that connects the 2 halves of the oil pump drive shaft together. Drain the oil and take off the oil pump cover, or take off top engine crankcase cover. If shaft does not turn when engine is turned over you need a new connector sleve, about $10 at your JD dealer. Be careful that oil pump shaft/gear does not fall out if oil pump cover is removed! Hold it in with a screwdriver or similar while someone turns the engine over. If it broke your next task is to find out be why it broke. In my case, crankcase moisture settled in the oil pump and froze (Feb. 1999 in ND). When the engine was started the sleeve broke.

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Rollo Ingram

08-25-2000 11:17:59




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 Re: JDA witout Oil Pressure... in reply to Leland, 08-25-2000 09:59:28  
I've got a '48 A which is probably similar.Your problem could be any one of the following:

1. Broken connector from the drive gear on the cam shaft (I think) to the shaft in the pume. I'ts a small square connector about an inch long.

2. oil pump output pipe broken or disconnected.

3. Complete clogging of the screen on the ol pump that keeps big stuff (twigs, believe it or not) out of the oil pump.

4. broken gear in the pump.

5. completely clogged oil filter.

6. probable, the oil pump sending tube to the gauge is plugged up.

7. no oil.

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