Bowman M158 repair issues

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Bowman M158 repair issues

OzSteamInc
Minor 1 - beginner
OzSteamInc
Minor 1 - beginner
Joined: February 28th, 2018, 10:31 pm

March 23rd, 2018, 2:44 pm #1

I seem to be getting the challenges lately!
 I picked up a well used M158 that was described as having a loose chimney and the exhaust extension pipe was missing. No problem, the pipe is an easy 5/32" slip on piece and the chimney/steam dome is a little soldering job on a moderate scale.The rest of the thing is all there and good, but was missing the burner.

What i discovered when it landed was the cylinder had numerous attempted repairs of soldering up cracks and holes. ( makes you think how the hell it got in that condition!!) It wasn't pretty and after filling in all holes and correcting bad soldering i noticed it was bashed around so much it was out of round and had old solder deposits in the bottom that make the piston bottom out causing each revolution to be lumpy and probably wouldn't work under steam anyway. 
The problem is if i melt the old solder out of the bottom it will probably destroy the repair work. The piston is in bad shape too because of it.

Im not really sure if i should go any further with this cylinder and thinking, besides a bowman replacement, do any easier to obtain Mamod cylinders fit this model?

any ideas would be appreciated.

(i'll try to post some pics later)
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Mamod Collector
Moderator
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Joined: June 12th, 2007, 5:12 pm

March 23rd, 2018, 5:11 pm #2

Oz could you drill out the cylinder to remove the old solder
Mike ™
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OzSteamInc
Minor 1 - beginner
OzSteamInc
Minor 1 - beginner
Joined: February 28th, 2018, 10:31 pm

March 25th, 2018, 1:45 pm #3

Mamod Collector wrote: Oz could you drill out the cylinder to remove the old solder
Yes, that's what i ended up doing, in fact right through and made a new end for the cylinder. Unfortunately the cylinder and piston have copped a hiding and seem to have gone out of round.I have successfully repaired the chimney and steam dome so no leaks from the boiler, but the cylinder just wont oscillate, it wants to, but i think there's too much steam getting past the piston. 
IMG_20180324_175450_resized_20180324_055834406.jpg IMG_20180324_175336_resized_20180324_055835120.jpg IMG_20180324_175450_resized_20180324_055834406.jpg IMG_20180324_175450_resized_20180324_055834406.jpg IMG_20180324_175336_resized_20180324_055835120.jpg
IMG_20180324_175709_resized_20180324_055833722.jpg
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OzSteamInc
Minor 1 - beginner
OzSteamInc
Minor 1 - beginner
Joined: February 28th, 2018, 10:31 pm

March 25th, 2018, 1:47 pm #4

sorry, i think i put the same picture in about 50 times, i cant work these stupid computer things......what does "next in line ' mean with pictures....!!??
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Frizzy
Minor 1 - beginner
Frizzy
Minor 1 - beginner
Joined: March 4th, 2017, 2:13 am

April 14th, 2018, 6:52 am #5

you could try hitting the head of the piston to try and mushroom it out a bit
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