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VP Steering Rack reseal.

Sandst4rm

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The difference between standard power steering and the speed sensitive power steering is the pump is full flow and the pressure is controlled at the rack via a solenoid.
Don't mean to start an arguement but if the pump didn't control its own pressure the same then at 5000rpm it would burst the pressure hose to the rack since the solenoid would be the only thing controlling pressure. In my experience the variatronic is at no point any easier to turn than normal steering but simply gets harder to turn at speed. All the solenoid does it restrict flow when at speed afaik.
 

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I can't speak for anything earlier than VS/VT as I've had those pumps apart and the only difference between the 2 pumps is the fitting on the back of the pump where the high pressure line is connected, the standard pump has a regulator valve and the speed sensitive pump has a straight through fitting. The straight through fitting is necked down so probably does limit max flow but it's certainly not pressure regulated. I have posted a photo of those 2 pieces somewhere on the forum.

I've literally used a standard pump for speed sensitive systems by changing the fitting in the back of the pump.

I dislike the variatronic steering as I find it's way to easy to turn the wheel, no feedback in the steering etc. Except when the system is playing up and faults out and then the steering is really hard.
 

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Found it,
file.php

On the left is the variatronic pump fittings, on the right the standard pump.

The power steering pumps from VN-VY V6 are basically the same, the only major difference from VN/VR and VS onward is how the fluid reservoir is mounted. Internally they all seem to be the same.
 

HeritageVP

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This guide is for a VT rack but VS and earlier will be basically be the same so this guide should give a good idea how it's done.

The difference between standard power steering and the speed sensitive power steering is the pump is full flow and the pressure is controlled at the rack via a solenoid.
Thanks mate, been digging around and found my way to an copy of an VR-VS Factory manual, digital of course. Good to know the racks didn't change between these models.

Fortunately I had to return to TAFE and my lecturer likes me so I was allowed to borrow Volume 5 I want to it was over night to study and photograph. Had the exact tears down I needed.

I appreciate the help though, trying to be a rebuild not a replace sort of fella
 

HeritageVP

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Found it,
file.php

On the left is the variatronic pump fittings, on the right the standard pump.

The power steering pumps from VN-VY V6 are basically the same, the only major difference from VN/VR and VS onward is how the fluid reservoir is mounted. Internally they all seem to be the same.
Interesting stuff, it's always nice to see bits can be changed over and converted, wish I was born 40 years ago so I could get amongst it when times were good
 

TheIceman

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I was unaware as they no longer teach rack rebuilding at Trade School, thus why I knew I need to track down scripture.
really? what do they teach these days? in the 3 years at tafe i did i learnt to pull everything apart and fix it, even power window switches, but i think i learnt that one myself though.
what they teach these days?? if its stuffed how to look for a new one instead of fixing it??
i found that part of learning, pull apart, learn how it works so you can diagnose things better and to fix it.
 
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HeritageVP

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really? what do they teach these days? in the 3 years at tafe i did i learnt to pull everything apart and fix it, even power window switches, but i think i learnt that one myself though.
what they teach these days?? if its stuffed how to look for a new one instead of fixing it??
i found that part of learning, pull apart, learn how it works so you can diagnose things better and to fix it.
A lot of emphasis on electronics, ignition systems, electronic management systems, in these classes you'll view the waveform of the signals and utilise live data.
In essence Auto leccys are being rolled into Light Vehicle
EFI, forced induction, dynometre, so how use and read a dyno but that's an optional class dyno. No carby class anymore that got dropped this year but it was an optional class. You still pull engines, diffs, auto and manual trans apart, but don't for alternators, P/S pumps or racks. You just go over operation, diagnosing and major service operations.
There's an a class for customer relations and parts so for ordering parts but that's optional. You have to do say 30 classes and there's 35 to pick but many are mandatory.

It isn't stuffed, it's weeping. Ultimately I've layed my filthy hands on an original unused VP Steering Manual Vol 5 I think it was so I'll document the reseal, once I do it. I may need to make a custom tool, to remove an retainer. It look almost like Dana 40 Spindal tool, 4 prongs coming off an socket at 12, 3, 6 and 9
 

Sandst4rm

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They made us rip racks apart at my TAFE a few months ago must be a campus specific thing. we did a VZ rack, we did it as a group though and was not assessed so technically its not part of it.
 
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HeritageVP

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They made us rip racks apart at my TAFE a few months ago must be a campus specific thing. we did a VZ rack, we did it as a group though and was not assessed so technically its not part of it.
It can cone down to time, and the lecturer. If the class doesn't breeze through the theory material then they may not have to time and the lecturer may just be there for the paycheck so to speak. I've been attending Regency Park, Adelaide.
 
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