Notices
1999 - 2003 7.3L Power Stroke Diesel  
Sponsored by:
Sponsored by: DP Tuner

Power Steering Pump

Thread Tools
 
Search this Thread
 
Old Jul 25, 2019 | 08:51 PM
  #1  
Markus Luukko's Avatar
Markus Luukko
Thread Starter
|
More Turbo
5 Year Member
Photogenic
Photoriffic
Joined: Feb 2018
Posts: 504
Likes: 24
From: CT
Power Steering Pump

Today after I changed my oil, I start the truck up and the brake pedal vibrates. Immediately I think the power steering pump is screwed up.
If you rev it up it vibrates less, the steering isn’t bad, when you press the pedal the whole system flexes.
It is the factory pump, 321k.
Any recommendations on a new pump? I am leaving for vacation on Sunday so I would need it by Saturday.
Thanks in advance!
 
Reply
Old Jul 25, 2019 | 09:17 PM
  #2  
Sous's Avatar
Sous
FTE Leadership Emeritus
Veteran: Air Force
Community Builder
Top Answer: 1
Top Answer: 3
Joined: May 2014
Posts: 27,352
Likes: 5,946
From: Lake Hartwell, GA
FTE Emeritus
Does it look/sound like this?


If so, a good flush, and I mean a good flush of the hydroboost system may help. I had replaced my steering gear in October time frame and bled the system using Valvoline synthetic ATF. Everything was fine until our ambient air temperature dropped into the teens and single digits for about 5 days straight. I guess the air or whatever in there caused a problem that was not present during warmer conditions.

I pushed about 3 quarts of fluid through the system as a last ditch effort before ordering a new hydroboost and by the 3rd quart the pedal was getting much better. I pushed another 2 quarts through and it was good to go and has been since then which was about 6 months ago.

On a side note, my steering pump has developed a very slow leak and I will be replacing it this winter. I will be going with a Motorcraft reman from Rock Auto.

https://www.rockauto.com/en/moreinfo...62608&jsn=1212
 
Reply
Old Jul 25, 2019 | 09:53 PM
  #3  
Markus Luukko's Avatar
Markus Luukko
Thread Starter
|
More Turbo
5 Year Member
Photogenic
Photoriffic
Joined: Feb 2018
Posts: 504
Likes: 24
From: CT
Originally Posted by Sous
Does it look/sound like this?

https://youtu.be/F3WpmLGLdn8

If so, a good flush, and I mean a good flush of the hydroboost system may help. I had replaced my steering gear in October time frame and bled the system using Valvoline synthetic ATF. Everything was fine until our ambient air temperature dropped into the teens and single digits for about 5 days straight. I guess the air or whatever in there caused a problem that was not present during warmer conditions.

I pushed about 3 quarts of fluid through the system as a last ditch effort before ordering a new hydroboost and by the 3rd quart the pedal was getting much better. I pushed another 2 quarts through and it was good to go and has been since then which was about 6 months ago.

On a side note, my steering pump has developed a very slow leak and I will be replacing it this winter. I will be going with a Motorcraft reman from Rock Auto.

https://www.rockauto.com/en/moreinfo...62608&jsn=1212
I didn’t really hear any noise from it, this pumps been through hell, it’s been starved a couple times and incorrectly purged. Doesn’t make much noise though, the only issue is the pedal pulsates/vibrates at a stop. I did buy 4 qts of fluid to try and flush it tomorrow. Worst comes to worst I’ll buy a new pump from the auto parts store and hope for the best.
 
Reply
Old Jul 26, 2019 | 12:11 PM
  #4  
Colorado350's Avatar
Colorado350
Postmaster
Joined: Nov 2015
Posts: 4,807
Likes: 125
From: Colorado Springs
If you start the truck and look into the reservoir can you see cavitation? If someone turns the wheel can you see cavitation of the fluid? I just bought a Advanced Auto pump, it’s been good for 2 years. KOW! My pump worked intermittent, no cavitation or very limited, and with it the brakes too. I also used Valvoline Synthetic ATF.
 
Reply
Old Jul 26, 2019 | 01:36 PM
  #5  
Markus Luukko's Avatar
Markus Luukko
Thread Starter
|
More Turbo
5 Year Member
Photogenic
Photoriffic
Joined: Feb 2018
Posts: 504
Likes: 24
From: CT
Originally Posted by Colorado350
If you start the truck and look into the reservoir can you see cavitation? If someone turns the wheel can you see cavitation of the fluid? I just bought a Advanced Auto pump, it’s been good for 2 years. KOW! My pump worked intermittent, no cavitation or very limited, and with it the brakes too. I also used Valvoline Synthetic ATF.
Last night i had my friend press on the brakes while i looked at the reservoir. there was no cavitation to be seen, only the power steering lines tensed up when the brakes were pressed. Turning the steering wheel seemed easy even with my larger tires. I decided to buy a NEW pump from napa, i have heard too many bad things about reman pumps and decided to go NAPA as they have a lifetime warranty with a brand new pump.
 
Reply
Old Jul 26, 2019 | 03:22 PM
  #6  
Sous's Avatar
Sous
FTE Leadership Emeritus
Veteran: Air Force
Community Builder
Top Answer: 1
Top Answer: 3
Joined: May 2014
Posts: 27,352
Likes: 5,946
From: Lake Hartwell, GA
FTE Emeritus
Originally Posted by Markus Luukko
Last night i had my friend press on the brakes while i looked at the reservoir. there was no cavitation to be seen, only the power steering lines tensed up when the brakes were pressed. Turning the steering wheel seemed easy even with my larger tires. I decided to buy a NEW pump from napa, i have heard too many bad things about reman pumps and decided to go NAPA as they have a lifetime warranty with a brand new pump.
Keep us in mind with how the install goes and what your thoughts are on the pump. I will be replacing mine in the fall/winter season and am curious to hear your thoughts.
 
Reply
Old Jul 26, 2019 | 08:39 PM
  #7  
Markus Luukko's Avatar
Markus Luukko
Thread Starter
|
More Turbo
5 Year Member
Photogenic
Photoriffic
Joined: Feb 2018
Posts: 504
Likes: 24
From: CT
All together again. Started out by removing the serpentine belt, alternator, intake and intercooler pipe. Siphoned out all the atf, removed the lines, and the lines to the power steering cooler. Virtually got all the fluid out. Put everything back together, and put the lines on. Used my finger nails to put on the teflon o ring, just go slow. Put in some Lucas Power Steering Additive, and then added fluid till I couldn’t. Put the truck in no start, cranked it over while I turned the wheel, did that a couple times till I deemed there was enough fluid in the system. Added a bit more and started the truck up and flushed the system till it was cherry red out of the return line. So far no leaks, no whine, brakes are fixed.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
djed
1999 - 2003 7.3L Power Stroke Diesel
7
Jul 9, 2016 05:47 PM
koski19
1999 - 2003 7.3L Power Stroke Diesel
4
Oct 30, 2012 05:39 PM
titanminator
1999 - 2003 7.3L Power Stroke Diesel
16
Mar 21, 2012 03:36 AM
clem1226
1999 - 2003 7.3L Power Stroke Diesel
23
Oct 19, 2011 10:09 AM
rolltide3006
1994.5 - 1997 7.3L Power Stroke Diesel
4
Jan 11, 2011 08:53 PM




All times are GMT -5. The time now is 01:15 PM.

story-0
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-1
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 10:59:05


VIEW MORE
story-2
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-05-30 18:33:59


VIEW MORE
story-3
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-4
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-5
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-6
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-7
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-8
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-9
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE