pump bearing ?
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pump bearing ?

  1. #1
    senior member turbo wog's Avatar
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    Default pump bearing ?

    is it wrong to put the pump bearing in on a jg berkley with the notches in the race faceing toward the bowl verses the front splines, i was told it did & now i must pull motor, rideplate ,loader,remove whole pump .. i just did this last sat. night any info thanks, turbo wog.

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    Sit N' Spin Jetaholic's Avatar
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    Quote Originally Posted by turbo wog View Post
    is it wrong to put the pump bearing in on a jg berkley with the notches in the race faceing toward the bowl verses the front splines, i was told it did & now i must pull motor, rideplate ,loader,remove whole pump .. i just did this last sat. night any info thanks, turbo wog.
    Actually the notch in the bearing must face the zerk fitting. That's where the grease enters the bearing.



    Quote Originally Posted by HammerDown
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    One part at a time... JohnnyNitrous's Avatar
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    X2

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    notch goes toward the bowl facing zerk aligned at 12 oclock, that notch is there to allow the grease into the bearing. i always heat the bearing on the bearing heater and freeze the shaft makes installing the bearing much easier on the bearing,

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    Senior Member Brendellajet's Avatar
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    Why not just pull the pump out the rear of the boat?

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    Sit N' Spin Jetaholic's Avatar
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    Quote Originally Posted by Brendellajet View Post
    Why not just pull the pump out the rear of the boat?
    I'm thinkin' he has to do all that cause he has a 3 point mount setup.



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

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    The notches (filling slots) are there to load more balls into the bearing during the bearing manufacturing process. The bearing type is a max-type double row angular contact with a back to back internal design, and if the notches are positioned in the wrong direction, then under thrust or axial loading, the balls can traverse the filling slots and degrade the bearing. Since the thrust direction in a jet is predominately forward, the notches should be towards the engine because the rear row in the bearing will carry the thrust load.

    If anyone can provide actual thrust load numbers in pounds or newtons I can have one our apps engineers (I work for NSK) determine if a max-type bearing is even needed for a jet application. If a max-type (extra balls) is not needed then a standard double row can be used and the notch location is not a concern because the standard bearing does not have a notch.

    This topic was covered on a HB thread or two and may still be there.

  10. #8
    NW Spectraholic Malcolm's Avatar
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    What SoCal said. A bearing doesn't need big slots to take grease!
    Malcolm

    75 Spectra 18
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    senior member turbo wog's Avatar
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    Quote Originally Posted by Brendellajet View Post
    Why not just pull the pump out the rear of the boat?
    can't get to the last bolt on bottom , double drilled

  12. #10
    senior member turbo wog's Avatar
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    Quote Originally Posted by Jetaholic View Post
    I'm thinkin' he has to do all that cause he has a 3 point mount setup.
    yeh 3 point & twin turbo crap with water lines etc.

  13. #11
    senior member turbo wog's Avatar
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    Quote Originally Posted by SoCal View Post
    The notches (filling slots) are there to load more balls into the bearing during the bearing manufacturing process. The bearing type is a max-type double row angular contact with a back to back internal design, and if the notches are positioned in the wrong direction, then under thrust or axial loading, the balls can traverse the filling slots and degrade the bearing. Since the thrust direction in a jet is predominately forward, the notches should be towards the engine because the rear row in the bearing will carry the thrust load.

    If anyone can provide actual thrust load numbers in pounds or newtons I can have one our apps engineers (I work for NSK) determine if a max-type bearing is even needed for a jet application. If a max-type (extra balls) is not needed then a standard double row can be used and the notch location is not a concern because the standard bearing does not have a notch.
    This topic was covered on a HB thread or two and may still be there.
    thank you, i did pull it & flipped the bearing . dropping motor back in tomarrow. thanks everybody!!
    Last edited by turbo wog; 08-24-2008 at 12:38 AM.

  14. #12
    B1 Racing cs19's Avatar
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    what so cal said is right on the money.

    moral to the story dont believe everything you read on the internet or the Seloc manual either.
    B1Racing.net

  15. #13
    No Sandbar To Far sanger rat's Avatar
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    There are two types of thrust bearing's. On one the notch faces forward and on the other it faces the rear.
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    Quote Originally Posted by One More Year View Post
    The only blab's I will even be a part of is just when it is me they are talking about. Aaaah yes I can see a few good looking shiny tall deck motors on the beach, with barely enough fuel to get back to the launch saying, "Holy crap how fast you think that Daytona was going man? That's like the 20th time he's gone by today?"

  16. #14
    Senior Member Brendellajet's Avatar
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    Quote Originally Posted by Jetaholic View Post
    I'm thinkin' he has to do all that cause he has a 3 point mount setup.
    Good time for a rail kit!

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