Power steering howling when turning - Defender Source
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  #1  
Old September 30th, 2011, 12:02 AM
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Chris Davis
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Power steering howling when turning

I just finished converting my D90 from v-belts to a serpentine belt set up and at the same time replaced my steering box with a new/reman one. I am using a used (unknown) power steering pump. I have the truck running and have bled the system per Meridians instructions and have also bled it at the steering box per rovers manual. When I turn left or right (both) the pump "howls" or is just way too noisy. Do you think I still have some air in the system or is that more indicative of a bad steering pump? Thanks!
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  #2  
Old September 30th, 2011, 12:24 AM
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barry f
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I would love to know what you figure out. My steering has a grunt/vibration when I am stationary and turning left. Does it every third rotation of the wheel. If you go full locked left and rock the wheel back and forth it does it badly. Sounds like it is coming from the steering box but not sure. Nothing is leaking. Thought it could be the pump but I think then it would happen turning right too.
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Are there shocks that I can addjust up and down like my friends LX460? That would be very cool!
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Old September 30th, 2011, 06:41 AM
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I had the same issues with my classic I ended up getting a new pump from RDS.
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  #4  
Old September 30th, 2011, 08:24 AM
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Quote:
Originally Posted by Davis View Post
Do you think I still have some air in the system or is that more indicative of a bad steering pump? Thanks!
Maybe a little of both. I assume that you have already done the lock to lock wheel turn thing several times. In addition, emulsified air bubbles need some time to sort out. If the reservoir gets low, or in your case you fit a new (used) pump, it will have foamy air in the fluid. Give it a couple more days to settle down and see if it improves.
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  #5  
Old September 30th, 2011, 01:57 PM
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Baird M. Gehring
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My '97 (76,500ish miles) makes a whine when the wheels are turned all the way left or right, I always thought this sound was normal.
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Old September 30th, 2011, 03:16 PM
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Quote:
Originally Posted by BMGmotors View Post
My '97 (76,500ish miles) makes a whine when the wheels are turned all the way left or right, I always thought this sound was normal.
That sounds normal but the sound they are talking about is more of a groaning, at least from what I've heard in Barry's truck. It's not the typical steering lock to lock sound.
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  #7  
Old October 4th, 2011, 07:16 AM
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Chris Davis
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Yeah, not the normal groan. I'm in the UK now, so having a pump sent back to the States and I'll just swap it in when home. Pretty sure it's the pump as it came with a bunch of used bits that I got and was N "unknown".
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  #8  
Old October 4th, 2011, 05:25 PM
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The growl sound in the NAS 1997's was due to a power steering hose length, it had to do with harmonics of the fluid in motion. There was a factory recall to correct it by replacing one of the hoses.
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  #9  
Old October 4th, 2011, 05:43 PM
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Make sure it is properly bled before replacing it. There is the bleed screw on the box.
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  #10  
Old October 4th, 2011, 08:33 PM
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sounds stupid, but 99% of the time PS makes noises the fluid is low. Add some and see if it goes away
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  #11  
Old October 5th, 2011, 08:17 AM
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Chris Davis
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Thanks guys-- the fluid us full, nice and bled as well. Any turning of the wheels results in the noise, so I'm pretty sure it is the pump. Never heard that about the hose length, though. I had my hoses custom made locally-- hope it isn't that, but I'll swap the pump first. In Paris now, but I'll report back next week.
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  #12  
Old October 24th, 2011, 11:59 PM
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Chris Davis
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Swapped pump, problem solved.
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  #13  
Old October 25th, 2011, 12:53 AM
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barry f
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Did you keep the old pump for anything?
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Are there shocks that I can addjust up and down like my friends LX460? That would be very cool!
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  #14  
Old October 25th, 2011, 01:27 AM
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Chris Davis
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I disassembled it for various reasons, mainly curiousity. I completely obliterated it, in sort of a classic "davis" fashion. I learned a lot about how little I know about these pumps. There is this cool round thick ring on the shaft with a lot of little metal shims in it and this all rotates within a floating elliptical ring...very curious things.

Long story short, I kept "parts" of it, for instance the triangular flange which I am going to reuse more....
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