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Thread: 315 pulley removal?

  1. #1
    Join Date
    Mar 2009
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    yuba city,california
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    Dizzy 315 pulley removal?

    Hello all: a friend needs a pulley from one of my D4 parts engines. Iíve never pulled one off the crankshaft before; can anyone offer me some pointers? I donít want to break it.
    Iíll look at the parts book later if I am able. TIA, JM.

  2. #2
    Join Date
    Nov 2006
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    Faunsdale, AL USA
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    You wonít break it if you use the correct puller that bolts to it.

    You cannot pull one using a jaw type puller that grips the outer rim. The one I pulled from a D318 was really stuck on there. In fact every Caterpillar crankshaft pulley I have ever pulled was really hard to get off. I ended up tightening my home made puller up as tight as I could get it and then smacking the end of the forcing screw with a light sledge hammer before I got it to pop loose from the tapered nose of the crankshaft.

    Note, small lock bolt (3/4Ē head size??) in the center of the big retaining bolt is LEFT HAND thread. I couldnít remember for sure which of the two was, so I looked it up in the servicemanís reference book.
    Last edited by ccjersey; 03-30-2020 at 02:11 PM.
    D2-5J's, D6-9U's, D318 and D333 power units, 12E-99E grader, 922B & 944A wheel loaders, D330C generator set, DW20 water tanker and a bunch of Jersey cows to take care of in my spare time

  3. #3
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    Nov 2007
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    NW Ohio
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    The large bolt takes a 2 3/4" six point socket and is right hand thread.

  4. #4
    Join Date
    Jan 2020
    Location
    Alaska
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    Quote Originally Posted by Rome K/G View Post
    The large bolt takes a 2 3/4" six point socket and is right hand thread.
    You can take a piece of flat bar with a slight bend in it and put a hole in it for the left handed threaded bolt. put the left handed threaded bolt back in LOOSELY to hold the flat bar and help break the big bolt loose.
    pully bolt].jpg
    Last edited by Fat Dan; 03-31-2020 at 12:18 AM.

  5. #5
    Join Date
    Mar 2009
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    yuba city,california
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    Thanks everyone. This helps a LOT. Should make my task a little bit easier. Hardest part is fishing the motor out of its resting place. Thanks again. JM

  6. #6
    Join Date
    Jul 2016
    Location
    Lancaster CA
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    713

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    Don't screw up the left hand threads with your puller screw. Telling on myself (old age) I have the left hand tap if you need it.
    Cat 12 grader, 8T6995 running and restoring, Cat 12 grader 9K3585. parts machine, Adams leaning wheel Pull grader Mod # 22, ser#438

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