Not sure if you already have it, but I found a copy of the ACP 2 manual (and other Ariakon markers) online here:
It does have an exploded view, but no specs on the o-rings afaik.
I also found that I had a copy of an Ariakon tech bulletin for some reason. If yours is in this SN range, it may be related to your problem.
Hope something here helps.
Serial Numbers: 001-1000
Bulletin ID: ACP-003
Symptoms: Users experience heavy leaking from the CO2 chamber area when installing a 12-
gram cartridge. Symptoms will be confirmed by visual inspection of the puncture pin assembly.
Part# 64170 (Seal) will be missing or detached from Part# 64280.
Cause: This issue has been traced to a faulty adhesive dispenser in one of the production lines.
#64170 “Seal” and #64280 “Inlet Valve” may not properly bond due to insufficient adhesive. This
problem affects approximately 30% of the units in serial range 001-1000. This issues poses no
safety concerns for consumers and is not caused by design fault.
Resolution: Replace puncture pin assembly in affected units. Instruct affected consumers to
contact Ariakon directly at 1-877-4-Ariakon or 760-268-0735. Consumers will be sent a
replacement puncture pin at no charge.
Note: Puncture pin assembly is a wearable part and will need to be replaced periodically by the
consumer during the course of normal operation.
Replacement of the puncture pin assembly can be accomplished by removing the CO2 Cap
(Part#64180-03) and unscrewing Puncture Pin Assembly using a flathead screwdriver. Care
should be taken not to damage the Inlet Valve (#64280) with the screwdriver when installing the
new Puncture Pin Assembly. New Puncture Pin Assembly should only be tightened to the point of
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