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I owned an LS-3 for many years, which has the same water ballast
system, I believe. [I was also a moderately willing participant in Erik's "nightmare" job on his LS-4 ]. I've heard from other LS owners that the little rubber boot that seals the valve pushrod where it enters the valve body can leak, either from a crack or hole in the boot or from loose clamps at either end of the boot. The difficult part of any work is getting the valve assembly out of the wing. I can't recall the specifics but if you've had the bags out of the wing, you've already conquered loosening the big nut that secures the bag/dump tubing to the valve. The rest of the difficulty is working nearly blind through the hole in the root rib to remove the valve. No cutting required, just long skinny arms with powerful fingers. I know the factory had at least one special tool (a long-handled wrench to loosen/tighten the aforesaid nut) and there may have been others. One question I would ask is whether the leak occurs anytime water is in the tank or only during filling/dumping? Is it better/worse when the left wing is up/down/level? Etc. This could help indicate where in the system is the leak. Chip Bearden "JB" ASW 24 |
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