How hard would it be ?

[secretagentmole]

Just watch this!

https://www.pyramydair.com/article/U...mp_May_2006/30

[thor123]

Just watch this!

https://www.pyramydair.com/article/U...mp_May_2006/30

Thanks for the information
I read somewhere the pump opens the gun filling port with every stroke therefore it's wearing the gun out more quickly.

[Murphy]

Easier than a rapid bottle!

[secretagentmole]

Thanks for the information
I read somewhere the pump opens the gun filling port with every stroke therefore it's wearing the gun out more quickly.

No, it remains open with pressure which is how you get a reading on the gauge on the pump!

[danco1987]

Only use a pump for my hw100 carbine, mostly topping up from the low green, sometimes the yellow area on the gauge. Its not hard work at all - just take it slow so the pump doesn't get hot and empty each 50bar. I've even pumped it from empty before. Had it nearly 4 years now and never had any problems using the pump (although first cylinder it had, had a leak but this was down to the seals but it was never right so I replaced it). Have inspected the cylinder it's had for most of the 4 years, taken it apart and looked at the inside whilst its been apart. No signs of corrosion or moisture. I've only ever filled it indoors, in a clean and dry environment.

[angrybear]

No, it remains open with pressure which is how you get a reading on the gauge on the pump!

Sorry, that's wrong.

One way fill valves have a tiny spring inside, just enough to seat the valve, as you pump the pressure in the hose exceeds the pressure in the gun so the valve is forced open, the two pressures then equalise & the spring seats the valve closed again.
Next stroke the same thing happens all over again.

The gauge on the pump shows the same pressure because hose & gun equalise, because all pressure between open vessels will equalise, which then allows the tiny spring to work.

[DSidelever]

I have done it several times. Much harder when the gun is near empty (although the first xx pumps are mostly boring).

You'll need somewhere quiet to do the job and take breaks.

DONT do the pumping by a public window

[thor123]

).

You'll need somewhere quiet to do the job and take breaks.

DONT do the pumping by a public window

Why is that

[DSidelever]

because a lot of it is total carp.

The only aspects of using a hand pump that could possibly affect your rifle are the Relative Humidity (of your surroundings, when pumping) and NOT taking it in stages / having short breaks.

The first concerns peoples' worries about a build-up of moisture in the rifle cylinder (largely non-existent IMO).

The second is connected with the heat that builds-up in the pump and the connector (also linked to the above).

Do it in stages (mug of tea on hand, maybe) & you'll be fine.

[DSidelever]

A person I know quite well was happily pumping away (torso held straight bending from the knees) by a window IN HIS DRESSING GOWN on a Saturday morning when the replacement Postie called in (she was late).

[bossmugler]

I top up my HW100 from the yellow with a hills pump a few times a week. TBH its not a problem at all

[averageplinker]

I top up my HW100 from the yellow with a hills pump a few times a week. TBH its not a problem at all

Yep, no problem with an FX pump either.