Big Cam Cummins Steering Pump

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Chevyho, Jan 6, 2014.

  1. Jan 6, 2014 #1
    Chevyho

    Chevyho Medium Load Member

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    Dec 13, 2013
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    400 Big Cam 3, Ive noticed for a while that my power steering reservoir level keeps climbing, the other day it started flowing oil out the reservoir lid constantly. I am assuming that there is a leaking seal between the oil pump and power steering pump and its putting oil into the steering system. My question is would the seal be on the power steering pump side? I havent had a chance to pull it apart yet because its -50 still, just want a little insight before I tear in.
     
    Chevyho, Jan 6, 2014
    Chevyho, Jan 6, 2014
    #1
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  3. Jan 6, 2014 #2
    JohnP3

    JohnP3 Road Train Member

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    Feb 21, 2010
    Rock Creek B.C. Canada
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    It is a Spicer pump, fully rebuildable, remove it, from the engine 2,of 3/8 bolts. Take a file and mark the three segments so you can put it back the same way it was, mount it in a vise and remove the 4, of 1/2 inch bolts. pull the cap off, then the pumping spacer, keep the vanes, I use a magnet, to colect them all. Then remove the shaft if it is worn at the seal area, replase the shaft, the seal and the 2 "O" rings. Or you can get a factory rebuild for twice the price. The 1/2 inch bolts are torqued to 90 lbs the mounting bolts to 35. You need a 1.5 inch wrench usually to take off the suction line, buy a new filter in the canister, and I use 15/40 w oil.
    Just a thought!
     
    JohnP3, Jan 6, 2014
    JohnP3, Jan 6, 2014
    #2
    Chevyho and Smellfunny Thank this.
  4. Jan 6, 2014 #3
    Chevyho

    Chevyho Medium Load Member

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    Dec 13, 2013
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    Wow excellent information! Which seal or oring do you think would be the culperit?
     
    Chevyho, Jan 6, 2014
    Chevyho, Jan 6, 2014
    #3
  5. Jan 7, 2014 #4
    JohnP3

    JohnP3 Road Train Member

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    Feb 21, 2010
    Rock Creek B.C. Canada
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    The seal on the shaft, it sucks in engine oil. the "O" rings only seal the PS fluid to the outside.
    Just a thought!
     
    JohnP3, Jan 7, 2014
    JohnP3, Jan 7, 2014
    #4
    Chevyho Thanks this.
  7. Oct 31, 2020 #5
    n4ane

    n4ane Light Load Member

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    Aug 28, 2020
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    I am having the same issues with my truck donyou have the rebuild kit part number?
     
    n4ane, Oct 31, 2020
    n4ane, Oct 31, 2020
    #5
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