keyshunter
Contributor
Rule of thumb: Lubricate dynamic o-rings.
I lubricate spool o-rings quite heavily.
I lubricate spool o-rings quite heavily.
Leaking HOG SPG
- Thread starter WhiteSands
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Chapter 11 if Harlow's book that you were going to buy. So many of your past and future questions would be answered.
halocline
Contributor
Those spool o-rings take a lot of abuse and are frequent leakers. Regarding the lube, it will help protect them from abrasion as the SPG moves around, and a coating of lube on the spool will help keep salt water off it. The center part of the spool is exposed to water, the tiny o-rings seal the ends. But it is also true that excess lube on the ends of the spool can foul things up and the air passage through the spool is tiny. So you want to carefully avoid getting any lube in there.
As awap said, buy Harlow's book, read it, and you'll have a much better basic understanding of how these things work. If you did that, you would immediately realize why a 'tight connection' at the SPG hose is irrelevant to an air leak there. It's fine to post questions on this forum, but some basic reading from a good authority single source of information will help you much more.
As awap said, buy Harlow's book, read it, and you'll have a much better basic understanding of how these things work. If you did that, you would immediately realize why a 'tight connection' at the SPG hose is irrelevant to an air leak there. It's fine to post questions on this forum, but some basic reading from a good authority single source of information will help you much more.
Most people don't actually understand the difference between dynamic and static orings as used in scuba, in any case, the SPG is a dynamic oring (it moves a good it) and IMO is the one exception to the lube lightly rule. The center of the spool between the orings is subject to water intrusion and I have seen a good number of SPGs ruined because the spool is corroded and stuck in the SPG or into the hose or worse yet both. Even if you get it appart, the corrosion is likely to damage or trash up the new oring or spool causing it to leak as well. I pack lube in the spool area between the orings to prevent corrosion. The old diving wives tale about excess lube "attracting" dirt is just that an old wives tale. The gap between the hose fittings is small so little to no dirt gets in but salt water will for sure and it's darn near impossible to rinse or soak out. Rather it stays and corrodes the works. Use your lube of choice but I suggest filling the gap to prevent corrosion.
LeadTurn_SD
Contributor
One more "lube the heck out of spool o-rings" post cannot hurt.
If the SPG is leaking where the OP says it is, replace the o-rings at the minimum, but it really is easier to just replace the whole spool while you are at it.
Like Herman and the other "usual suspects" mentioned, this is the exception for the "lube lightly" rule. Lube liberally.
Best wishes.
If the SPG is leaking where the OP says it is, replace the o-rings at the minimum, but it really is easier to just replace the whole spool while you are at it.
Like Herman and the other "usual suspects" mentioned, this is the exception for the "lube lightly" rule. Lube liberally.
Best wishes.
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