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J.B. Castagnos
| | Posted on Sunday, March 03, 2002 - 12:57 pm: | 
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I just rebuilt an 8hp Lockwood Ash 2 cyl. for a friend. Had two sleeve one cylinder because the wrist pin had gouged it. I ordered rings fron a supplier, 5/16 x4, filed the end gap and assembled the engine. It seemed pretty stiff to turn but I thought I'd try running it to see if it would loosen up. After a few minutes running it was no better, hard to crank and would die too soon to reverse. Took it down and checked all clearances, made sure the sleeve was installed square to the crank and everything checked out OK. While checking butt gap on the rings again I noticed they were very hard to slide in the cylinder. They were about .005" thicker than the old rings, the width was OK, had plenty of room in the groove behind the ring. I put a piece of pipe in the lathe and machined a step to hold the ring, drilled and tapped a hole to put a pointed screw to fit in the gap and lock the ring. After machining .020" out of the inside the rings are noticably easier to compress. Reassembled the engine and it's unbeliveable, cranks easy, good compression and reverses with no problem. Looking at the specs for the original rings and it calls for 12 to 15# wall pressure. Anyone know how to measure this? J.B. |
satish
| | Posted on Friday, November 22, 2002 - 12:47 am: |
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i m a marine engineer and served on ships for 15 yrs. Presently i m trying to enter teaching profession especially marine engines.I wud be obliged if somebody can give me manuals of old engines like sulzer RD ,RND,RL series |
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