You will have realised that I am a bit of a sucker for ageing lumps of cast iron in need of restoration. So I could not resist a circa 1940 Worthington Simpson Steam Pump that Mark Rudell offered to me. It seemed it would serve well as a boiler feed pump or circulating pump for the condenser. (providing I could ignore the fact that it’s about 5 times the size we need – but hey the designer said I needed 500KG of ballast in the bottom of the boat, and given I can barely lift this beauty it’s all grist to that mill!)
It clearly needed a bit of a clean and a check over, and it took about a week’s work. These are often known as “Donkey Pumps” as they tend to do their work for years with little in the way of maintenance or attention – it seems this one had certainly “done its time” in this mode.
Rather than provide a blow-by-blow commentary on the work it involved, the following pictures will hopefully provide the detail:
- Get it apart, Inspect, remove (many) layers of old paint, and clean inside and out.
- Reface the mating faces of the pump valve chests.
- Reseat/regrind the 8 suction and supply valves (using reciprocating valve grinder).
- Repack and adjust the glands on steam and pump cylinders.
- Make new packing rings for pump cylinders (in PTFE).
- Turn a blind eye to the wear in the pump cylinders (I might re-sleeve these later)
It runs well, and the remaining wear in the pump cylinders make it less efficient than it should be, but in it’s planned role as circulating pump it should be fine…. The pictures show some of the steps: (remember you can click to see a full size image…off to watch Strictly !)