AT-309 Pump?
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AT-309 Pump?

  1. #1
    engorged member barrymac's Avatar
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    Default AT-309 Pump?

    I have an American Turbine AT-309 in my boat with a droop and Place Diverter, there is a Thrust Bearing and Bowl Bearings, how often should I be greasing these? Someone told me to grease the Thrust Bearing every time I put the boat in the water and grease the Bowl Bearings twice a season. Can anyone confirm this for me? Also the same person told that I can use the same grease in both of the Pump bearings that I put into my trailer bearings? I want to make sure I am doing the right thing, especially since I had to completely rebuild the pump at the beginning of this season. Any info would be very much appreciated.

    BarryMac

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    21 Daytona Outlaw's Avatar
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    http://www.americanturbine.com/ go to support/downloads then click on manual.

    I personally grease the bowl bearings fist of season, mid season, and when I winterize.
    the thrust bearing gets it about every 10 hours of run time.
    #55

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    Senior Member CK7684's Avatar
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    I was told every 25 hours, but I do it more than that just to be on the safe side...probly every 10 hours or so...

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    Senior Member jetboatperformance's Avatar
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    Barry the recommendation (A/T) is to grease every 30 hrs of operation or if the jet/boat "sets" for more than two months , recommended lube is "EP" (extreme pressure grease with moly (we use the A/T grease or Valvoline . Overfilling /overgreasing (much more than 2/3 full) the grease/bearing cavity can cause the bearing to run hot not to mention making a mess . One of most common causes of brg failure is moisture instrusion BTW. Tom

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    21 Daytona Outlaw's Avatar
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    Oh yeah I use Mobile 1 synthetic
    #55

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    engorged member barrymac's Avatar
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    Thanks for the info guys. It seems that I am over greasing the pump by doing it each trip, once a month or every three trips should be more then sufficient. Tom, where can I buy the grease that you use? I have been using the wheel bearing grease and after reading the AT manual it specifically says do not use wheel bearing grease. Should I flush the bearing somehow when I put in the new grease? Again, I want to thank you guys for the great info.

    BarryMac

  9. #7
    engorged member barrymac's Avatar
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    Quote Originally Posted by Outlaw View Post
    Oh yeah I use Mobile 1 synthetic
    Do you buy this at any local parts store?

  10. #8
    Senior Member jetboatperformance's Avatar
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    no flushing ,just add (unless contaminated somehow) ep brg grease is available just about anywhere ,call if you need help locating it Tom

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    21 Daytona Outlaw's Avatar
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    Quote Originally Posted by barrymac View Post
    Do you buy this at any local parts store?

    Yes my local NAPA has it along with Auto Zone,

    PS
    I use the same stuff in the wheel bearing on my trailer
    #55

  12. #10
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    The red Mobile One synthetic grease is the shiat!!
    The ONLY grease that will hold up on the axle splines/caps on a Sprint Cup full floating axle (especilay in the old rear camber days).
    Most teams either take it out of the tube or cover the tube with duct tape to hide it from their oil sponsors (did I just say that?)


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    BTC cardcarrying member SuperSoaker's Avatar
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    Mobile One Syn. Here

  14. #12
    engorged member barrymac's Avatar
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    Thanks for the replies everyone, I will be changing to the Mobil 1 this coming weekend, sounds like the way to go...

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    Boat Nut sleekcrafter's Avatar
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