Reply To: Ransom mower

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#44686
davidbliss
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Its sort of presentable it runs really well with little smoke as manage to find old rings that were a bit better, but it needs a piston and rebore. Quite a few nuts had to be replaced as rotted away that hold cutting cylinder bearing housings, the special seals were sort of useable but to hold them in place and to stop them turning on the shaft had to make spacers to make them captive. removed the rotten tinwork from the box and the grass deflector welded in some new, rollers and handles so it works. However there was one annoying problem the centrifugal clutch was a bit weak and to get it to drive to work its engine had to be run rather fast and to keep it from slipping it needed the revs up and I was nearly at a run, I just thought its had oil or grease get onto the linings or worn out. So today I thought it looked like a easy thing to slide engine across to gain access to the shoes. Yes it was easy apart from bolt heads had rotted away and to keep it still on old Whitworth fittings welded up the rotted heads and machined back, and the clutch was like new but there was a giveaway it had been off before as shoes had there trailing edges chamfered off, now you only do that to leading edges so the shoes had been fitted round the wrong way so shoes work leading to give a mechanical assist to grip. They now work so engine can be throttled right back and still drive at a walking pace. Going back together found the engine had been running out of line so the toe bearing was causing drag so the clutch drum was always revolving once the dog clutches were disengaged, it needed one shim and bit wiggling so now with the engine running its always stationary and the drive shaft can be spun by hand, So a worth-while easy fix. This isn’t first time I have come across this, so some of the early weird and wonderful clutches worked but not for long.

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