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Airforce Pump issue

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  • #22688
    joea
    Participant

    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

    #269910
    Anonymous
    Inactive

    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

    #269914
    joea
    Participant
    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.

    Sent from my iPad using Tapatalk

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