Sprag assmebly replacement

Discussion in 'Manton Push Rods Top Alcohol Tech Questions' started by 57Chev, Oct 22, 2018.

  1. 57Chev

    57Chev Member

    Joined:
    Dec 27, 2014
    Messages:
    49
    Likes Received:
    0
    What's a good indication that the Sprag or Inner and Outter race needs to be replaced? Or is it just a consumable item? I know its usually the Inner race is what wears first.



    This is for a Lenco Drive.
     
    #1
  2. Mike Canter

    Mike Canter Top Dragster

    Joined:
    Mar 10, 2004
    Messages:
    4,162
    Likes Received:
    76
    Yes, the inner race is consumable. If it is grooved or rough or blued then it needs to be replaced. They should look like new. Call Matt Moore at APT. phone 619.933.8636 They make excellent Lenco parts for less money.
     
    #2
  3. TOL

    TOL Active Member

    Joined:
    May 18, 2005
    Messages:
    1,148
    Likes Received:
    6
    Does this APT company have a link?.......
     
    #3
  4. Mike Canter

    Mike Canter Top Dragster

    Joined:
    Mar 10, 2004
    Messages:
    4,162
    Likes Received:
    76
    Let me find out tomorrow. We have been getting Lenco parts from Matt for awhile now and their quality is great. APT builds stronger parts for the Lenco reverser that stops that breakage problem.
     
    #4
  5. lucky devil

    lucky devil Member

    Joined:
    Apr 14, 2008
    Messages:
    219
    Likes Received:
    1
    interesting...
     
    #5
  6. rb0804

    rb0804 Member

    Joined:
    Aug 7, 2010
    Messages:
    494
    Likes Received:
    20
    #6
  7. TOL

    TOL Active Member

    Joined:
    May 18, 2005
    Messages:
    1,148
    Likes Received:
    6
    Hey thanks Rob. If only they could come up with a sprag eliminator that did not need springs every 4-6 runs !.......
     
    #7
  8. rb0804

    rb0804 Member

    Joined:
    Aug 7, 2010
    Messages:
    494
    Likes Received:
    20
    While we are on the topic, anyone have any info on the mechanical diode vs. the helo sprag vs. the sprag eliminator? Some years ago I seen a drag boat that had an air line to the rear portion of the case and they said it was an air assisted mechanical diode. Any info on this? Of all the problems with the Lenco, the sprag hasn’t been an issue for us.
     
    #8
  9. TOL

    TOL Active Member

    Joined:
    May 18, 2005
    Messages:
    1,148
    Likes Received:
    6
    You do realize of course now that you have made that public statement Mr. Murphy is going to send you a sprag failure? :). Take Care.
     
    #9
  10. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
    Staff Member

    Joined:
    May 6, 2003
    Messages:
    6,429
    Likes Received:
    68
    Never forget Smith's law - "Murphy was an optimist."
     
    #10
  11. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
    Staff Member

    Joined:
    May 6, 2003
    Messages:
    6,429
    Likes Received:
    68
    I'll add to what has been mentioned. On the element itself, you are looking primarily at the inner part and looking to see if the rounded part of the element is developing a flat spot. If enough elements lose this rounded edge, they lose the ability to lock and 'flip.' This flat spot is usually easy to see, it will be 'shiny' most of the time. If the shine is close to 50% or more across multiple elements, it's time to replace.

    I have heard of teams running an oversize inner race with a used element.

    If anyone wants some sprag eliminator assemblies, I have some for sale!
     
    #11

Share This Page