Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

What's the best way to bleed air from a new power steering pump?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BrianDamage, Mar 12, 2003.

  1. BrianDamage

    BrianDamage 1/2 ton status

    Joined:
    May 14, 2001
    Posts:
    753
    Likes Received:
    0
    Location:
    Alabama
    What\'s the best way to bleed air from a new power steering pump?

    What's the best way to bleed air from a new power steering pump?
     
  2. jimmyjack

    jimmyjack 1/2 ton status

    Joined:
    May 11, 2000
    Posts:
    2,290
    Likes Received:
    0
    Location:
    Tucson Az
    Re: What\'s the best way to bleed air from a new power steering pump?

    I jacked mine up til the tires were just off of the ground and moved the wheelback and forth. I also cracked the fittings just a touch and let the fluid foam out. It's a little messy but it's quick.
     
  3. bad andy

    bad andy 1/2 ton status

    Joined:
    Mar 5, 2003
    Posts:
    151
    Likes Received:
    0
    Location:
    Charlotte, N.C.
    Re: What\'s the best way to bleed air from a new power steering pump?

    jack it up, have somebody crank the wheels back and forth (don't have to do it fast) while you pour the fluid in /forums/images/graemlins/k5.gif
     
  4. Blazer79

    Blazer79 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,816
    Likes Received:
    0
    Location:
    Guatemala, Central America
    Re: What\'s the best way to bleed air from a new power steering pump?

    You must have the engine running, so I prefer to pour the fluid first and then run the engine.

    Chilton manual mentions giving short crankings (not allowing the engine to start) while you pour the fluid. Don't know why.
     
  5. BrianDamage

    BrianDamage 1/2 ton status

    Joined:
    May 14, 2001
    Posts:
    753
    Likes Received:
    0
    Location:
    Alabama
    Re: What\'s the best way to bleed air from a new power steering pump?

    [ QUOTE ]
    jack it up, have somebody crank the wheels back and forth (don't have to do it fast) while you pour the fluid in /forums/images/graemlins/k5.gif

    [/ QUOTE ]

    LOL I tried that already...the fan blew fluid everywhere!
     
  6. GMCLegacy

    GMCLegacy 1/2 ton status

    Joined:
    Jan 24, 2002
    Posts:
    620
    Likes Received:
    0
    Location:
    Grand Haven, MI
    Re: What\'s the best way to bleed air from a new power steering pump?

    i think i recall reading in the chilton that you should leave the pully off the new pump and turn it opposite f engine rotation, keep topping the level off untill it and turning by hand until it doesnt go down anymore, then put the belt on and you should be set. you will probably have to add more once you get it running.
     
  7. BrianDamage

    BrianDamage 1/2 ton status

    Joined:
    May 14, 2001
    Posts:
    753
    Likes Received:
    0
    Location:
    Alabama
    Re: What\'s the best way to bleed air from a new power steering pump?

    appreciate the help folks - think I got it...I had it jacked up turning the wheels back and forth last night, but it just didn't seem to be working. I guess I just didn't give it long enough. Worked on it about 5 minutes this morning and appears to be working fine./forums/images/graemlins/thumb.gif
     
  8. nvrenuf

    nvrenuf NONE shall pass! Premium Member

    Joined:
    Jan 7, 2002
    Posts:
    13,079
    Likes Received:
    247
    Location:
    Mobile, Al.
    Re: What\'s the best way to bleed air from a new power steering pump?

    Man, I'm glad you said that! /forums/images/graemlins/thumb.gif I knew I had read that somewhere and every time I try to tell people the look at me like I have a tumor or something. /forums/images/graemlins/rolleyes.gif
     
  9. Bob Hope

    Bob Hope Registered Member

    Joined:
    Feb 25, 2003
    Posts:
    14
    Likes Received:
    0
    Location:
    Pinconning, MI
    Re: What\'s the best way to bleed air from a new power steering pump?

    for future reference...

    fill the resevoir to the correct level with power steering fluid. if you have a vacuum pump, pull a 20 inhg vac for 5 minutes.

    with the truck on the ground, turn stop to stop 15 times, don't worry about the excessive noise, it will go away.

    top off the pump to the correct level. pull the 20 inhg vac again for 15 minutes.

    run stop to stop 5 times and then pull the vac for 5 minutes.

    top off the pump and you are good to go.

    if you don't have a vacuum pump let the truck sit for 20 minutes between runs.

    power steering fluid comes with an anti-foaming agent that will help get the air out of the fluid.


    this is the prodecure we use here at a tier 1 automotive supplier in Saginaw, MI

    edit: changed mmhg to inhg for vacuum level
     
  10. Leadfoot

    Leadfoot 1/2 ton status Premium Member

    Joined:
    Nov 28, 2000
    Posts:
    3,112
    Likes Received:
    1
    Location:
    Western Massachusetts
    Re: What\'s the best way to bleed air from a new power steering pump?

    What kind of fitting do you use to draw the vacuum (modified cap??), also if you start to pull 20mm/hg won't the vacuum drop as it removes air.....i.e. do you have to pump it a few more times to bring the vacuum back up to 20 or is that initally vacuum enough (even if it drops)?
     
  11. Bob Hope

    Bob Hope Registered Member

    Joined:
    Feb 25, 2003
    Posts:
    14
    Likes Received:
    0
    Location:
    Pinconning, MI
    Re: What\'s the best way to bleed air from a new power steering pump?

    we use a rubber stopper with a steel tube through the middle of it. the stopper is large enough the cover the hole in the top of the pump to form a face seal.

    as the vacuum is applied, the air leaves the oil but does not leave the system and the 20 inhg (not mmhg i was mistaken before) vacuum is maintained, the fluid level drops. if the vacuum drops, you have an air leak in the system. it could be a seal in the gear or the o-rings on the hoses.
     

Share This Page