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  1. #1
    Tejas57
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    Default Oil Pump Shaft issue on 79 Shovel

    I bought a basket case shovel and was told the oil pump needed to be replaced. I took the stock HD pump off and was going to replace it with an S&S pump. The shaft that runs to the pinion gear doesn't come out far enough to install the C clip. The oil pumps are the same size and the gears mesh up fine, but the main shaft of the pump doesn't come out far enough. Help!

  2. #2
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    Remove the pushrods and the cam cover and see what's going on in the cam chest.

    Best to install the new pump shaft that comes with the new pump.

    Jim

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    ^^^ What he said ^^^

    I've always had to nudge the shaft a cunt hair from the timing cover side. While you're there you'll have the pushrods off to unload the cam so inspect your cam lobes and tappet rollers (pull the tappet blocks) using a BRIGHT FUCKING LIGHT. Check the bottom of the timing chest for chips by fingerbanging it, and flush with brake cleaner.

    Since they said the pump "needed replacing" (for what specific reason?) I suggest you look further. If I get a mystery engine I've never heard run it gets torn down for a full inspection because gaskets and seals are a LOT cheaper than finding out the seller ignored internal damage or never knew it happened!

    Is the top end still installed? Have you performed a leakdown test? Pull the oil pump tappet screen and look for chips (that's also periodic maintenance and something MANY bikers forget).

    What you carefully inspect now can save you serious money.
    Last edited by farmall; 06-24-2020 at 9:49 PM.

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    If the pump shaft was pushed in while the pump was being replaced, the key for the driven gear could come out of the gear's keyway ...

    Pulling the cam cover for a look is a must ...

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    JBinNC and Dragstews:

    Since you gents build more Shovels than anyone else here by a long shot, and OP bought a basket so we have a (potentially) good thread for this if OP posts pics, what would you want to see in a vintage Harley engine teardown/inspection checklist?

    OP, post pics of the old pump disassembled on something white like a paper towel, and of both sides of the pump body.

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    Quote Originally Posted by farmall View Post

    What would you want to see in a vintage Harley engine teardown/inspection checklist?
    1) Blondes
    2) Redheads
    3) Burnette's






    In any order, I'm not picky ....
    Last edited by Dragstews; 06-25-2020 at 10:06 AM.

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    All of them in a circle chowing down on each other would be of great technical merit.

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    OP the photos of what you find would be of great interest to see for others ...
    Last edited by Dragstews; 06-25-2020 at 11:22 AM.

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    In m y limited experience the S&S shat was longer than my stock shaft(knuckle)

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