Herman wrote:The SP MK-2 is about as simple as it gets. I have a couple if you are interested in a first stage. The USD Aquarius is also an easy one to service. Both regs use a couple of common orings and simple HP seats that you can buy or make your own. Same goes for the second stages that were commonly sold with them. Not much to the service manuals. Actually I have never seen a SP manual, plenty of parts breakdowns and a few service tips but never an actual manual.
I would suggest you get copies of both "Regulator Savvy" by Peter Wolfong http://www.scubatools.com and "Maintenance and repair of Scuba Regulators" by Vance Harlow http://www.airspeedpress.com RS is more technical- the deep dark hows and whys a reg works as opposed to M&R of SR which is more of a how to, hands on book. The 2 overlap each other and between the 2 you end up with a solid knowledge of the theory along with a practical hands on knowledge.
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