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Steam Traction World

Live steam, large scale model Traction Engines


Setting Top Ball Lift in the Water Pump

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Setting Top Ball Lift in the Water Pump Empty Setting Top Ball Lift in the Water Pump

Post  Rodd Perrin Fri 14 Jun 2013, 6:06 am

Hi There,

I am currently completing the water pump (Kit 21) and have stuck a slight hurdle.


When I pop the 4 washers on the brass screw that will limit the lift of the top ball, the screw bottoms out before tightening up on the washers.


Cannot really deepen the hole in the top ‘plate’ as it is pretty much at maximum depth now, so I will need to shorten the screw……

So – Do I set the height for the top of the screw from a reference point (similar approach to limiting ball lift in the check valves) or do I simply shorten the screw so it tightens up on the four washers?

Regards,

Rodd

Rodd Perrin

Number of posts : 8
Location : Melbourne, Australia
Registration date : 2010-01-19

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Setting Top Ball Lift in the Water Pump Empty Some Photos to Help...

Post  Rodd Perrin Fri 14 Jun 2013, 6:13 am

Unassembled....

Setting Top Ball Lift in the Water Pump Water_15

All together showing the gap after the screw is 'home'

Setting Top Ball Lift in the Water Pump Water_16

Rodd Perrin

Number of posts : 8
Location : Melbourne, Australia
Registration date : 2010-01-19

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Setting Top Ball Lift in the Water Pump Empty Re: Setting Top Ball Lift in the Water Pump

Post  lynnr Fri 14 Jun 2013, 6:18 am

Hi

You need to, without the washers, bottom the screw on top of the ball. Then wind the screw back 1mm. Measure the length and pack that length with washers. This will set the lift. You don't need or most likely not use all the washers as more than enough is supplied. Remember to measure with your gasket in place. If your screw is too long. File it down to fit.
lynnr
lynnr

Number of posts : 3242
Age : 56
Location : Highland, 4inch showman
Registration date : 2010-08-06

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Setting Top Ball Lift in the Water Pump Empty Sorted...

Post  Rodd Perrin Sat 15 Jun 2013, 10:57 pm

Hi Lynn,

Thanks for the advice Smile
All fixed now to give a ball lift of 1 mm and with a washer to spare!

Rodd

Rodd Perrin

Number of posts : 8
Location : Melbourne, Australia
Registration date : 2010-01-19

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Setting Top Ball Lift in the Water Pump Empty Re: Setting Top Ball Lift in the Water Pump

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