Hello All,
I have just finished a rebuild of my 1937 Model 9, series 2 and aside from a small oil leak from a stripped thread (now fixed). This model has a three way oil fitting that is screwed into the rocker box to provide oil to the rocker and oil gauge mounted in the tank. There is also a tapered needle screw to adjust the volume of oil to the rocker box.
Can anyone advise me on what the adjustment should be ie. are there indications of too much oil supply. I can't see how it is possible as excess oil would just run down the pushrod tubes.
Obviously to little supply would result in the rocker bushes seizing.
Brett
There's not a lot of information on the rockerbox oil supply.
If you can get a 1937 version of The Book of the Sunbeam by Heathcote it will help a little.
The information in these books varies a bit depending on the year they were printed.
If you get too much oil to the rockers it will run all over the engine, guess how i know.
but i have found this for you.
Have fun with your Sunbeam ,,I have
John hood
Thanks for that information John. My adjusting needle is held from vibration by a spring ( à la Amal idle screw). I've just measured the thread to see what nut I would need and it stumped me for a while as it's 1/4" by 40 tpi. Turns out it's a Model engineer thread so I'll either have to visit a model train park or buy a tap.
Brett