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Old 19th February 2016, 08:45 PM
James caffery James caffery is offline
Join Date: Aug 2012
Location: Northwich
Posts: 17
Default Air arms s400 seal sizes

Hi, I am fairly new on this forum, i am buying a air arms s400 tomorrow, which has a air leak, the seller says it has a slow leak coming from the gauge, so i was thinking of changing all the seals before buying a new gauge, does anyone know what the correct size seals I would need, I would be greatfull if someone could help
Thanks Jim
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Old 19th February 2016, 09:02 PM
DEAN C.'s Avatar
DEAN C. DEAN C. is offline
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Join Date: Apr 2009
Member of: Emley Moor FTC
Location: Doncaster
Posts: 686

Just change the gauge seal into the mount block, and the gauge block seal as they are separate from the rest of the gun and easy to change without disturbing anything else. Never seen a gauge itself leak internally on any gun, and it would be unusual if it did. I've seen it on larger industrial gauges where the internal bourden tube has fractured though.

Sometimes the gauge mounting block just needs a nip with the hex key. Look at the Air arms site for diagrams or Julian Bonds airgun spares site for the same, and prices. No connection to me other than being a satisfied customer.
It certainly wouldn't put me off buying it.

Last edited by DEAN C.; 19th February 2016 at 09:08 PM.
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Old 19th February 2016, 11:53 PM
robsue20 robsue20 is offline
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Join Date: May 2010
Location: plymouth
Posts: 142

6x1 and bs008 are the O-rings for the gauge mounting block, there is also a dowty seal under the pressure gauge itself.
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