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  1. #1

    Default Vacuum test on alpha 1 gen 2

    Is a vacuum test recommended for this drive. Pressure tests fine, holds 15 psi
    Thanks,
    Jcris

  2. #2
    Join Date
    Dec 2006
    Location
    Chaumont Bay, N.y., USA
    Posts
    5,220

    Default Re: Vacuum test on alpha 1 gen 2

    Naw,.... That's a Volvo thing,....
    Any Grease is Better,... Than No grease at All....

  3. #3
    Join Date
    Sep 2003
    Location
    New Tripoli, PA, USA!
    Posts
    15,272

    Default Re: Vacuum test on alpha 1 gen 2

    Personally, I rely more on vacuum testing of lower units than pressure. If the seals leaks oil OUT the drive will keep functioning--it will run fine when half empty (or more)--but if the seals allow water to get in it's curtains! A vacuum test will tell you if water can be sucked in.

    Jeff

  4. #4
    Join Date
    Jul 2008
    Location
    Northboro, Ma, USA
    Posts
    4,788

    Default Re: Vacuum test on alpha 1 gen 2

    Actually jeff you have it backwards.....
    Water will lubricate temporarily where as if you go half empty on gear oil you will fry the bearing in the cap on the top of the upper case.

    Pressure testing will confirm no oil will leak out...it does not always confirm water could get in.
    If water is present in gear oil and the drive (empty) passes the pressure test then a vacuum test should be done. 4-8 inches is typical to expose a leak.
    Jack
    Northborough Ma
    Helping others sometimes with an attitude....haha..

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