PAS pressure?

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ard126k
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PAS pressure?

Post by ard126k » Sun Sep 27, 2020 8:22 pm

Sorry, really basic question :oops:
I'm trying to find an elusive leak in my PAS and I want to pressurise the system. Now I realise the pump has to be running (engine on!) but do I also need to be turning the steering wheel? Or take it to full lock? The wheels are off the ground.
Alex.


1971 SE5, 1977 SE6a, previously 1982 GTC

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AJL Electronics
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PAS pressure?

Post by AJL Electronics » Sun Sep 27, 2020 8:44 pm

An elusive leak is often the joint between the pump and its tank. Took me ages to find that. It doesn't take much to distort it enough to allow a weep to start.


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gtcse8
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PAS pressure?

Post by gtcse8 » Sun Sep 27, 2020 10:37 pm

Alex you should have rung me :wink:
When NO torsion is on the pinion bar the oil ways are fully open and the fluid is free to pass and return to the pump.
Once the steering is turned WITH THE WHEELS ON THE GROUND, the torsion bar within the pinion twists and opens the grooves within to allow fluid to flow where it is supposed to, ie left or right of the ram piston.
I will not go into detail on the actual process as we will be here all night :roll:
The only way of pressurising the system is to go to full lock AND rev the engine. :w


Mark Wilson. Garage sale everything must go. :cry:1 SE6b, 1 GTC Shell &1 SE6a shell & a Triumph Daytona. Also on YouTube :wink: lookup V8 Chevy https://youtu.be/lbpvDGAMY6g https://youtu.be/7xTrbr0ETSA https://youtu.be/K7HfYVd5Flo

ard126k
Posts: 959
Joined: Tue May 24, 2011 4:24 pm
Location: Fife

PAS pressure?

Post by ard126k » Mon Sep 28, 2020 5:34 pm

Hi Mark I didn't want to upset you with memories of 'the worst rack you'd ever seen' you reworked for me!
You might remember that I had bother getting the pipes to seal into the rack, well it seems that I'm still having bother. When I thought that I'd managed it before I evidently wasn't putting any real pressure on the joint, and it's been spotted leaking by the MOT man as an advisory. I'll have another look and probably ring you about a new 'olive'!
Alex.


1971 SE5, 1977 SE6a, previously 1982 GTC

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