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Re: 1939 Matchless G3 No Oil Pressure

Some additional items to check.
If the pump guide pin has any ware at the point that it engages with the pump then oil will not get up to the head.if there is any flat spot on th3 pin then replace it.
Make sure you have the correct reciprocating pump fitted and not the later pump as they are not interchangeable
Make sure the hole in the front end plate allowing the oil to be pumped up to the head is not blocked and the the gasket paper does not cover it over.
Make sure there is oil in the sump by squirting oil down the pushrod tubes
Prime the system by removing the cap over the filter and filling the tube with oil. Also use an oil can to back fill the return pipe by squirting oil down the return hole in the tank.
Make sure you do not have the return and feed pipe the wrong way around.
I always get on my bikes and ride them around the block before I check that oil is returning to the tank as it takes ages.

Let us know how you get on. JT

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