Oil circulation procedure

[volker.halbach]

Terry, I am sorry. You can confirm your suspicion by blowing into the pickup pipe and blocking the copper pipe at the other end where it comes out of the crankcase. If you detect a leak there, I cannot think of another solution than to split the crankcase.

[Mick D]

Hi Terry

You can do a bit more diagnosis before you gain access to the pump, do as I and others have suggested and blow up the pipe, if it passes air easily you have a leak in the system, if it passes air when you kick the bike it has a priming problem, if it doesn't pass air you have a blockage.

Highlighting where the problem may be helps in location when you dive in deeper.

Regards Mick

[Terry.C.]

HI guy's, The saga continues.
So far I have discovered that the oil sludge trap was totally blocked Nd I did not need to strip the engine down as access was possible via the sump.
But so far no circulation of the oil even whr running the engine for a few minutes
Next technical question.
Next to the bottom of the oil pump on the left hand side there is a hole which spews out oil into the timing case.The oil spew is no where near the run of the timing chain.
Looking at Drags parts list from 1941 to 1951 there was a non return valve fitted in there part no's 81 82 and 84 nothing is listed for 1953.
It seems they replaced it for 1956 to 1958.
The question is should it be blocked off and could it be drawing in air at this spot causing the oil circulation problem?
Looking forward to your replies
Regards
T