Hub oil draining

Discussion in 'Ask An Owner Operator' started by JonJon78, May 22, 2022.

  1. JonJon78

    JonJon78 Road Train Member

    Jul 1, 2018
    How often do you guys drain&refill the hub oil on your truck/trailer?
    4mer trucker Thanks this.
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  3. baha

    baha Road Train Member

    Jul 25, 2013
    Depending on how many mi you get, every 6 or 12mo take off ft caps and make a card board drain to get old oil off the wheels and then with new gasket put caps on and refill and wait and top up to full line, the rear can be done if don't have a drain in hub, by parking on a hill to side so gear oil runs into hubs then turn around and let it run to other side, keeping track of the mi you have been changing the rear end gear at 1st 2 hundred fifty thousand and 1 hundred thousand after that, and keep a ck on wheel bearing end play will keep tires wearing correct.
    D.Tibbitt Thanks this.
  4. BoxCarKidd

    BoxCarKidd Road Train Member

    Aug 26, 2014
    Normally when the seal is leaking or the oil looks bad in the front hubs. Check for metal in front hubs during service with a pencil magnet. Some have a plug with a magnet on the end, check those. Jack up and check for loose bearings. Adjust as necessary.
    We had a request to pull and inspect front wheel bearings. Driver came through and asked how they looked. Great like brand new we will replace the seals and get it back together. He said " I spend a lot of time in that truck. There is a lot of time to thank about a lot of things. I have been sitting on top of those bearings ( 9670 IHC ) for a million miles. Can we just replace them anyway so I do not have to thank about them anymore? " Yes Sir. No problem.
  5. jason6541

    jason6541 Road Train Member

    Mar 5, 2012
    Omaha, NE
    Use to do it yearly. Clean oil helps seals live and bearings cool
  6. Arctic_fox

    Arctic_fox Road Train Member

    Sep 16, 2016
    In fairness after my experinces with MY truck i tend to be distrustful of any part attached to it i personally havent replaced. So i can see where he is coming from. Especially with a million or more miles, not unreasonable to expect fatigue cracks to have formed that may be microscopic now but could expand suddenly. And next thing you know your axle is in itty bitty peices......

    To the OP i plan to change mine yearly along with the seals.
    Bean Jr. Thanks this.
  7. Opendeckin

    Opendeckin Light Load Member

    May 20, 2018
    I change it when I change the hub oil caps and I change the hub oil caps when I can no longer clearly see through the plastic or when they start leaking through the plug.
  8. ProfessionalNoticer

    ProfessionalNoticer Road Train Member

    Apr 25, 2021
    I only do it if the cap comes off for some reason.
  9. Big Road Skateboard

    Big Road Skateboard Road Train Member

    May 2, 2021
    Unless you pull the hubs, or you have drain plugs (truck axles) you're not getting all the oil out.

    My personal opinion is to check bearing play every quarter, and only drain hubs when changing oils or when you lose a seal.

    Most bearing failures I have seen were after replacement where someone screwed up, next up is losing a seal and not paying attention.

    If you watch you're truck/trailer close, the likelihood of a catastrophic failure is slim.
    Bean Jr., bumper Jack and GYPSY65 Thank this.
  10. Rideandrepair

    Rideandrepair Road Train Member

    Aug 8, 2015
    Does topping off one that’s leaking qualify as changing the oil?
  11. kemosabi49

    kemosabi49 Trucker Forum STAFF Staff Member

    Jan 13, 2013
    SW Arkansas
    I used to have a Nissan Sentra that went through a lot of oil. Went the oil light came on I'd put 2 quarts into it. Had 190,000 when I got it. Had 240,000 miles when I gave it away and was still running good. I never once changed the oil but I did change the filters a few times.
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