Mamod SL1 / MSS Loco Changing Reverser Block

A very popular starting point for Live Steam. With their low cost comes a number of problems which can be discussed here
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Modelenthusiasts
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Mamod SL1 / MSS Loco Changing Reverser Block

Post by Modelenthusiasts » Tue Feb 21, 2017 11:46 pm

Can you help me please?

I need to remove the forward/ reverse block (to find out why there is no steam to one cylinder) from an old Mamod SL1 and I'd like to know the favoured method for an old engine.

Any advice would be welcome.
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Big Jim
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Post by Big Jim » Thu Feb 23, 2017 5:25 pm

Remove the front bolts on the cylinder assembly and with a bit of wiggling it should drop out. You nay need to release the steam pipes.

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DLRdan
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Post by DLRdan » Thu Feb 23, 2017 7:21 pm

It possible to do by the method Jim has mentioned but I usually end up taking the body off the chassis.

However, I would leave the reversing block where it is and take the cylinders off, that way you can see all the passage ways and look through the reversing valve. If it hasn't been run for a long time its possible that old oil has set in the passages.
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Post by GardenSteamer » Sat Feb 25, 2017 10:13 am

If you are going to disturb the reversing block get two new 1/4" x 1/8" replacement O rings to seal the pipework. The existing ones go hard after a time and then leak steam if they are moved.

Jim

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