So here's a summary of the weekend's activity - getting nearer completing the strip of the timing gear in preparation to splitting the crankcases.
As you will remember, I'd removed the dynamo sprocket after a bit of a struggle and went on to make a gudgeon pin puller so that I could lock the crankshaft, prior to removing the rest of the timing gear. I locked the crank with a bit of 5/8" bar through the little end eyes, protecting the crankcase mouth with some strips of 3/8" MDF, then I knocked back the tab washers on the oil pump & camshaft nuts. Both these nuts appear to have a 25/32" hexagon, close to 20mm - I used a 20 mm six sided socket. Fortunately neither nut was particularly tight and they came off with no drama. The camshaft pinion is provided with two 1/4" BSC tapped holes, so its easy to pull the pinion off:
With the cam pinion out of the way, I could wind off the oil pump drive and remove the oil pump. It's a mazak type pump - we'll think about replacing that at some point, but it probably won't be in the first phase of this rebuild. I might buy an SRM one.
The oil pump drive is damaged. We'll have to get it clean to see if it is useable. It's not a very good picture but a small part of the gear is broken. It seems odd that this weak pinion is pulled up tight to control axial movement on the crankshaft:
I was concerned about pulling the crankshaft pinion off - or rather, I was concerned about spending more time making another puller. In the event, it moved with the slightest encouragement from a pair of screwdrivers (I think Steve C mentioned that his wasn't difficult). Now I just have to clean the parts up and store them before moving on to the crankcase and crankshaft.
