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1950 C Hydraulics and Compression
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Posted by David Bean on November 25, 2002 at 08:33:58 from (128.110.9.125):
Hi all, Spent the weekend getting a 1950 C up and running again -- had to drill in some helicoils in the carburator body, make a new fuel line, and troubleshoot the 12-volt conversion. Couldn't have been a better way to spend a couple of days ;-). I've got two questions, though, that I'm hoping someone out there could help me with... First, I ran a compression test on the cyclinders and found pressures of 95, 95, 75, and 80. The 75 and 80 will come up to 90 or 95 if I put some oil in the cyclinders, so I think I've got those pegged as ring issues. I haven't got my tech manual yet, though, so I'm not sure if the 95 readings are satisfactory. Does anyone know what compression rate I should expect on the 113 engine? Second, I'm worried about the hydraulics. The levers themselves were really rusty...removed the linkages and I almost had to put a wrench on them to move them back and forth. Still, I got the levers loosed up, I greased the movement arms (not sure what to call those things), and I replaced the hydraulic fluid. When I engage the levers, I hear a nasty, high-pitched squeal...in either direction. It sounds like the system is laboring...the governor will jump up the idle when I'm doing this, so something is taxing the system. When I had the linkages off of the levers, I tried moving the rods they attached to (under the hydraulic reservoir), and they moved easily enough by hand. So I don't think they're frozen. My guess is that either the movement arms are tight, or the pump isn't operating efficiently. In any case, has anyone run into a similar situation before? If I were to start tearing down a part of the system, where do you think I should start? Many thanks, - David
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