I was trying to static time a 650 like a jubilee and pulled the hex shaft that drives the oil pump up with the distributor shaft. Is this shaft fixed in the oil pump with a set screw? I got it to stick in the distributor shaft then seat with the rotor aligned right. I got the tractor started and the pressure gauge is reading almost max. How do I know if the shaft fell in correctly? What problems have I created. I shut it down, afraid it might seize the engine, or do other damage. How do I fix it?
- Thread starter vharris4
- Start date
john in la
Well-known Member
If you have oil pressure the shaft has to be in right.
No way for the oil pump to turn without the shaft.
If the shaft were in wrong you would have 0 oil pressure.
It is common for oil pressure to be high at first start up due to cold thick oil.
As the engine warms up the pressure should go down.
Taking the shaft out and putting it back in has no effect on how much pressure the pump builds.
That is the pressure relief valve in the pump's job.
So if the pressure stays high even after warm up you either have a bad gauge or stuck pressure relief valve.
No way for the oil pump to turn without the shaft.
If the shaft were in wrong you would have 0 oil pressure.
It is common for oil pressure to be high at first start up due to cold thick oil.
As the engine warms up the pressure should go down.
Taking the shaft out and putting it back in has no effect on how much pressure the pump builds.
That is the pressure relief valve in the pump's job.
So if the pressure stays high even after warm up you either have a bad gauge or stuck pressure relief valve.
Larry NCKS
Well-known Member
Good preliminary way. I'd either finish tuning by ear or by timing light. The latter would likely yield closer results!
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