Hand pump for DAR Gen II .22 Rifle

[cmhughes]

Since I am having trouble getting the fill probe of the DAR Gen II rifle I just got to seal properly in the female end of the Air Venturi G9 hand pump, are there any other decent but affordable hand pumps that the DAR fill probe WOULD fit better in?

In the mean time, I am going to keep trying to find a larger 0-ring that works.

Thanks

 

[shambozzie]

Did you try a #010?

 

[Trucker3573]

Don’t think it’s the fault of your hand pump but completely a Dynamic Air Rifle problem. The fill probe on mine wouldn’t seal when connected to my air Venturi canister filter. Luckily it did seal when connected to the foster fitting on the little cigarette filter directly on the pump. That is how I filled mine for the very short time I kept my DAR. 

 

[nervoustrig]

If you haven’t already, definitely try swapping the O-ring in the female Foster fitting.

Both the current DAR probe made of steel and the pre-release brass one have sealed fine for me on two Chinese-made pumps and an older Hill pump. They all have a -010 O-ring installed.

 

[BackStop]

If you haven’t already, definitely try swapping the O-ring in the female Foster fitting.

Both the current DAR probe made of steel and the pre-release brass one have sealed fine for me on two Chinese-made pumps and an older Hill pump. They all have a -010 O-ring installed.

So far, the 2 Chinese hand pumps I have work well with the DAR probe. However, I don't like proprietary fill probes in general.

 

[cmhughes]

By "#010", do you mean 1/4 inch inside diameter x 3/8 inch outside diameter (referenced as -010 from what I have seen)?

 

[cmhughes]

Any particular material of these that works best (nitrile, silicone, neoprene, EPDM, etc.)?

 

[cmhughes]

Just measured the G9 o-ring and it seems as if it already is a #010 (1/4 ID x 3/8 OD). If so, it seems I would need something with a smaller inside diameter ID which would make it a little thicker.

 

[nervoustrig]

Just measured the G9 o-ring and it seems as if it already is a #010 (1/4 ID x 3/8 OD). If so, it seems I would need something with a smaller inside diameter ID which would make it a little thicker.

Using calipers? Measure its thickness to determine whether it's SAE or Metric. 0.070" thick or 0.059" thick?

To get an accurate measurement, take care not to put a squeeze on the O-ring. Close the jaws slowly as you slide the O-ring between the jaws. Stop as soon as you feel friction.

It would be unusual for a Chinese-made product to have an SAE O-ring. However if indeed it is a -010 already, the next step up would be a metric M2 x 5.5.

 

[cmhughes]

Don't have digital calipers (only a manual one which does not have metric), but the thickness is 1/16 inch which would put it in between 0.059 and 0.070.