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Old Gun Tech Specific how-to's on fixing and tuning in those old guns

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Old 04-01-2019, 11:25 PM   #1 (permalink)
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Sterling pump o rings?

Anyone have a good source for quality ones?
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Old 04-04-2019, 08:56 PM   #2 (permalink)
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ive been looking into this too. from what ive found out they have standard size o-rings. haven't taken mine apart yet to confirm
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Old 04-04-2019, 09:08 PM   #3 (permalink)
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Yeah. Cleaned, oiled, aired up today. Leaks like siv and wont cock. Also think its missing velocity adjuster.
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Old 04-04-2019, 10:16 PM   #4 (permalink)
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Here she is.20190404_170126.jpeg20190404_170141.jpeg20190404_173938.jpeg
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Old 04-05-2019, 12:21 PM   #5 (permalink)
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That looks like a late generation Proline Sterling to me, those did not have Velocity Adjusters. As for "leaking like a siv" is it coming from the barrel? If it is that's typically the cup seal on the valve, Palmers Pursuit Shop sells that style valve, I believe its for an Autococker.
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Started with a Splatmaster, moved onto a Nelspot 007, then came the Autocockers, then a STERLING Pump, next was a Bob Long defiant then a PM7. As of now I have 10 Sterling Pumps, 2 Phantoms for SC, a CCM SS-25, a PGP and a Sovereign 3.


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Old 04-05-2019, 01:32 PM   #6 (permalink)
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Thanks turbo! I don't know much about it other than my brother bought it from the shop owner more than 20yrs ago. It's dead nuts accurate, but shoots to hot for commercial field use. We always played outlaw woods and had plenty of long shots available. I wanna use it again so need to get velocity down. I'll contact palmers and see what he says. Its leaking primarily from the rear.
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Old 04-05-2019, 01:38 PM   #7 (permalink)
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Quote:
Originally Posted by Aluminumchef View Post
Its leaking primarily from the rear.
Wait, it's leaking from the "rear", rear what the Back Bottle Adapter?

If that's the case it could be something different. But no matter what the Donkey Body need to seal so it'll give enough pressure to for the valve to go forward enough for the hammer to catch the sear on the pump lug.
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Started with a Splatmaster, moved onto a Nelspot 007, then came the Autocockers, then a STERLING Pump, next was a Bob Long defiant then a PM7. As of now I have 10 Sterling Pumps, 2 Phantoms for SC, a CCM SS-25, a PGP and a Sovereign 3.


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