Bullied light pacific City of Wells and that valve gear

Here Wells collects it train at Oxenhope

 

 

Here you see the chain driven valve gear in the oil

bath. Many thanks to the Southern-Locomotives

 

The sides of the oil bath are indeed the frames and

leather cup seals were used when these were first

built which were prone to heavier leakage as the

 seal broke down . Later modern materials such as

neoprene have done much to reduce this difficulty.

 

Further details and description can be found at

http://steammemories.blogspot.co.uk/2015/02/bullied-pacific-enclosed-valve-gear.html