Power steering dead at track.
#1
Drifting
Thread Starter
Power steering dead at track.
PS failed while on track, first session of day.
PS pump belt is fine.
No fluid loss.
Rack is a rebuilt unit with maybe 200 miles on it, including the ~100 mile drive to track.
Pump is of indeterminate age.
Any quick checks/tests I can run trackside with limited toolset?
How about when I get home, where to start?
Sorry if this is covered on a thread that would pop up in search, I'm in the paddock on phone with sketchy connection.
PS pump belt is fine.
No fluid loss.
Rack is a rebuilt unit with maybe 200 miles on it, including the ~100 mile drive to track.
Pump is of indeterminate age.
Any quick checks/tests I can run trackside with limited toolset?
How about when I get home, where to start?
Sorry if this is covered on a thread that would pop up in search, I'm in the paddock on phone with sketchy connection.
#2
Three Wheelin'
Hey Ken, sorry to hear that. Hope you weren't at risk on the track when system failed.
I'm sure we will get more advice for you when other people jump on. I just replaced entire system in mine so I will try and help anyway I can.
More info if you have time: what symptoms do you see right now? Resistance, noise, etc.
Check reservoir for strawberry froth.
Check outer boots for fluid, they can hold alot before you see it on the ground.
There isn't much that will fail in pump, if it spins, except the gasket, which you would see.
Internal rack seal failure most common at load.
I would not open banjo yet on powered line to rack, but that can be a way to verify supply. System will clear air afterwards.
Stay safe, Dave.
I'm sure we will get more advice for you when other people jump on. I just replaced entire system in mine so I will try and help anyway I can.
More info if you have time: what symptoms do you see right now? Resistance, noise, etc.
Check reservoir for strawberry froth.
Check outer boots for fluid, they can hold alot before you see it on the ground.
There isn't much that will fail in pump, if it spins, except the gasket, which you would see.
Internal rack seal failure most common at load.
I would not open banjo yet on powered line to rack, but that can be a way to verify supply. System will clear air afterwards.
Stay safe, Dave.
#3
Rennlist Member
Pump pulley bolts still there/not sheared off?
Can you see fluid movement in the reservoir with the cap removed?
If both of those check out then internal rack seals are the most likely candidate.
Mike
Can you see fluid movement in the reservoir with the cap removed?
If both of those check out then internal rack seals are the most likely candidate.
Mike
#6
Three Wheelin'
You can check for supply to the rack, if you have the tools there.
But, I assume it's a failure in the rack.
It sounds like you have steering and suspension, but just a hell of an effort required for turning?
I have heard of people track driving on de-powered racks, but I wouldn't.
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#10
Rennlist Member
Ken,
John [Firemn131] recently had a similar sounding mysterious issue after a rack rebuild- he found a little piece of plastic in the reservoir that he reckoned was blocking the outflow [strange though it seemed]. After removal the problem disappeared.
Lost any plastic bags recently?
John [Firemn131] recently had a similar sounding mysterious issue after a rack rebuild- he found a little piece of plastic in the reservoir that he reckoned was blocking the outflow [strange though it seemed]. After removal the problem disappeared.
Lost any plastic bags recently?
#11
Rennlist Member
I didnt see what car it was , but pretty typical of these pumps to cavitate in the heat of battle at track days , they spin too fast and will destroy thenselves at consistenat high rpm with track use.
I have destroyed plenty of the same pumps here in Queensland .
My rebuilder loves me .
A solution is too spin them slower , however given the position of the pump , not an easy task .
Lucky they are easy too rebuild if you have spares .
I converted my race car to electric, the best system I have on the car and by far the cheapest .
I have destroyed plenty of the same pumps here in Queensland .
My rebuilder loves me .
A solution is too spin them slower , however given the position of the pump , not an easy task .
Lucky they are easy too rebuild if you have spares .
I converted my race car to electric, the best system I have on the car and by far the cheapest .
#12
Drifting
Thread Starter
Ken,
John [Firemn131] recently had a similar sounding mysterious issue after a rack rebuild- he found a little piece of plastic in the reservoir that he reckoned was blocking the outflow [strange though it seemed]. After removal the problem disappeared.
Lost any plastic bags recently?
John [Firemn131] recently had a similar sounding mysterious issue after a rack rebuild- he found a little piece of plastic in the reservoir that he reckoned was blocking the outflow [strange though it seemed]. After removal the problem disappeared.
Lost any plastic bags recently?
#13
Drifting
Thread Starter
I didnt see what car it was , but pretty typical of these pumps to cavitate in the heat of battle at track days , they spin too fast and will destroy thenselves at consistenat high rpm with track use.
I have destroyed plenty of the same pumps here in Queensland .
My rebuilder loves me .
A solution is too spin them slower , however given the position of the pump , not an easy task .
Lucky they are easy too rebuild if you have spares .
I converted my race car to electric, the best system I have on the car and by far the cheapest .
I have destroyed plenty of the same pumps here in Queensland .
My rebuilder loves me .
A solution is too spin them slower , however given the position of the pump , not an easy task .
Lucky they are easy too rebuild if you have spares .
I converted my race car to electric, the best system I have on the car and by far the cheapest .
#14
Drifting
Thread Starter
On drive home I discovered that if I turn the steering wheel ~90 degrees left or more, the power kicked in all the way to full left stop, but the moment you begin to turn right, power assist stops.
#15
Drifting
Thread Starter
Talked to seller. Pulling rack off tonight to send back as soon as I can get it packed and over to UPS, plus the original core for this one. ( So two racks total, long story)
Pulling rack is not the very worst 928 job, but I am frustrated that that I am doing it again so soon and it cost me an entire track weekend.
Pulling rack is not the very worst 928 job, but I am frustrated that that I am doing it again so soon and it cost me an entire track weekend.