Airforce Pump issue

[joea]

Hi,
My 12 year old Airforce hand pump is giving me an issue. I get the pressure up to 50 BAR and I get really heavy resistance on the upstroke of the pump. I cant pump it past this point. When I hold my hand over the fill cap on the end of the hose it seems to be blowing out on both upstroke and downstroke. Any ideas what’s up?

Thanks
Joe

[Anonymous]

Hea Joe ………

First thing I would check is the inlet check valve and or it’s spring.
Clean out the excess lube in the inlet also, often times this is the place where a lot of lube ends up.

If not you need to rebuild the pump when doing so the biggest mistake is using to much silicone lube.
A light coat is all you need, don’t put globs of it on ……. just a thin coat.
Keep your hands clean, grease free to help from getting into a frustrated build.

Also there is a rubber ball that need cleaning with denatured alcohol and clean the inlets where it rests in also.
Don’t use lube on this ball, you don’t want a sticky ball ….. :rofl:

Best rebuild video even if this guy has his ranting, just mute it.

O-ring Seal Kit:
http://www.ebay.com/itm/Benjamin-Crosman-PCP-HPA-Hand-Pump-O-ring-Seal-Kit-Viton-O-ring-Update-/151723534620

If you only need the main Viton 90 durometer O-ring, I believe the valve O-ring is the same size … not sure … it’s been awhile.
http://www.theoringstore.com/index.php?main_page=product_info&cPath=367_5_10&products_id=392

If your in the USA, PM me your address and I’ll send u a bunch of them for free, no charge to u Sir.

~ Greg

[joea]

quote GKU:

Hea Joe ………

First thing I would check is the inlet check valve and or it’s spring.
Clean out the excess lube in the inlet also, often times this is the place where a lot of lube ends up.

If not you need to rebuild the pump when doing so the biggest mistake is using to much silicone lube.
A light coat is all you need, don’t put globs of it on ……. just a thin coat.
Keep your hands clean, grease free to help from getting into a frustrated build.

Also there is a rubber ball that need cleaning with denatured alcohol and clean the inlets where it rests in also.
Don’t use lube on this ball, you don’t want a sticky ball ….. :rofl:

Best rebuild video even if this guy has his ranting, just mute it.

O-ring Seal Kit:
http://www.ebay.com/itm/Benjamin-Crosman-PCP-HPA-Hand-Pump-O-ring-Seal-Kit-Viton-O-ring-Update-/151723534620

If you only need the main Viton 90 durometer O-ring, I believe the valve O-ring is the same size … not sure … it’s been awhile.
http://www.theoringstore.com/index.php?main_page=product_info&cPath=367_5_10&products_id=392

If your in the USA, PM me your address and I’ll send u a bunch of them for free, no charge to u Sir.

~ Greg

Thanks Greg! Looks like I have a greasy job to do. I’ll PM my address…thanks for the generosity.

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