Have any of you folks built and put the optional motor/gearbox Walther’s sells on it to make it a real operating “walking beam” pumpjack? Is it as cool as it would seem to be? They sell a completely assembled pump, motor, and gearbox for O-Scale and they look pretty impressive. I’m hoping the smaller size does too.
Thanks for any responses…
Jim Duda
Austin, TX
i did not know it was possible.[:p][:)][8D][;)]
Well…my pump model Walther’s part no. 933-3170 actually contains 3 spur gears and specifically states that part no. 933-1050 Motorizing Kit will then attach with one screw and make it “pump”. Apparently the motor/gearbox is 1:360 reduction. Both above part numbers can be seen on Walther’s site www.walthers.com. I know the bigger scale version looks fantastic pumping away. Supply is 6 - 12 VDC…6 VDC is very close to scale rotation speed. Since it is DC you can reverse the direction of the counterweights but I think CCW is correct when viewed from the left of the pumpjack.
I’m just curious how smooth the HO scale version operates…
Jim Duda
Austin, TX
Actually it does not matter which way a pumpjack rotates, it still pumps oil either way. the speed at which they move varies greatly due to pressure in the casing and viscosity of the oil. The ones I work with are also dirty and covered in more oil than a big mac. They usually have a small shack at the rear end which houses the one cylinder engine that drives them by a 4 inch wide belt. My info is based only on the ones I have worked on. They vary from each one and they vary from each oil company, so i may not be correct if asked by another oil company field technician.