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PostPosted: Wed Mar 14, 2018 3:23 pm 
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Joined: Tue Mar 12, 2013 1:35 pm
Posts: 863
Location: North Of Toronto
I noticed lately with my MK 4 hand pump what sounds like a little puff of air at the end of the down stroke. I have piece of kleenex on the area of the fitting where the pump and rifle connect and to wear the hose is connected to the pump. Nothing air escaping. If i'm putting air in and stop for 5 min, no air is leaking either. The sound is making me curious of what is going on!

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PostPosted: Wed Mar 14, 2018 7:25 pm 
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Joined: Sat Nov 05, 2016 10:52 am
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Location: Caronport, Saskatchewan
Could be an oring starting to leak in the pump or it could be your bleed valve needs to be tighter, if you find it doesn't make the sound til the pressure starts getting higher.

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PostPosted: Thu Mar 15, 2018 2:21 pm 
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Joined: Wed Oct 17, 2007 3:27 am
Posts: 2549
Location: Winnipeg, Canada
My MK-3 will do that when the hose inlet seal at the base of the pump is not fully compressed. I have to use a wrench to get it tight enough to seal properly.
Just about time for my pump to have a maintenance lube...

-D.S.

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