Posted by:
Mike Clark (---.glfd.adsl.virgin.net)
I had a piston rod let go in August with the usual mechanical mayhem. All is now fixed with the help of J Goold but as the cause of the failure was clearly metal fatigue due to the rocking stresses on the cross head induced by the single ball bearing guides I decided to switch to the bronze slide arrangement. This needed a considerable revision of the drip feed oiling setup which has worked very well on this "dry" Stanley engine for the last 6000 miles.
Here are a few pictures.
The oiling system has two main parts, firstly a set of four oil nipples which I use on firing up to squirt oil onto the eccentrics and into the main crankshaft bearings. I moved these from their previous position on the near side of the engine where they were very hard to get at even by grovelling on the ground as I did in the past. They are now on the offside just behind the hook up shaft and are easily accessed through a tiny sliding panel in the engine case.
The second part consists of a pair of small tanks which drip feed oil directly to a trough on the top slide of the crosshead, to the wrist pin, and up through the lower bronze slide to the underside of the crosshead. Each of these pipes has a 1mm restriction at the outlet end and the one which feeds the wrist pin is sharp pointed and aligned so as to drip between the crosshead and the connecting rod so the oil is directed to the bearing bush. These tanks are topped up with about 25ml of oil each time I stop for water but now instead of simply pouring the oil into the tank through the opening top hatch of the engine case (a messy job) I am now making a brass oil tank fitted to the side of the car which which will have a plunger pump to transfer oil to the drip feed reservoirs and which can be operated from the driving seat - luxury indeed! The transfer will go through a pair of flexible pipes via the top hatch on the engine case.
Mike
Edited 2 times. Last edit at 03/11/09 07:26PM by Mike Clark.