Power steering questions
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Heel & Toe
Joined: Oct 2010
Posts: 23
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Power steering questions
Im working on a 76 vette. I was cleaning underneath the car today, fired it up and the wheels turned hard to left. Any ideas? No power steering all now. It has the hi pressure line or some control valve leaking. Air in the system maybe.
Thanks for your help,
Will
Thanks for your help,
Will
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
If the fluid has been drained and refilled if hoses have been removed/changed, there will be air in the P/S system. That must be purged by lifting front end and turning steering wheel lock-to-lock several times (engine off), then repeating with engine ON. After that, the control valve needs to be balanced [so there is no tendency to turn one direction]. But the "lurching" steering system is due to air in the lines/cylinder.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Once you purge air from the system, turn the engine off and pry off the [outer] cap at the end of the control valve. The nut under that cover is the adjustment for balancing the system. Front end in the air, left wheel off the car, start engine, place wheels straight ahead (if they will stay there on their own). Slowly turn the nut CCW until the wheels just begin to move on their own. Put a grease pencil or felt-tip marker mark at the top (12 o'clock position) on the adjustment nut. Now, slowly turn the nut CW until the wheels start to turn on their own the other direction and place another mark at the top of the nut.
The final adjustment is to turn the nut CCW until both marks are equidistant from the 12 o'clock position of the nut...in other words, split the difference between those two marks. The control valve is now centered. Tap the cap back on the valve, install the left-front wheel, drop the car and you're done.
The final adjustment is to turn the nut CCW until both marks are equidistant from the 12 o'clock position of the nut...in other words, split the difference between those two marks. The control valve is now centered. Tap the cap back on the valve, install the left-front wheel, drop the car and you're done.
Drifting
Joined: Sep 2010
Posts: 1,581
Likes: 50
From: Prosper TX
Once you purge air from the system, turn the engine off and pry off the [outer] cap at the end of the control valve. The nut under that cover is the adjustment for balancing the system. Front end in the air, left wheel off the car, start engine, place wheels straight ahead (if they will stay there on their own). Slowly turn the nut CCW until the wheels just begin to move on their own. Put a grease pencil or felt-tip marker mark at the top (12 o'clock position) on the adjustment nut. Now, slowly turn the nut CW until the wheels start to turn on their own the other direction and place another mark at the top of the nut.
The final adjustment is to turn the nut CCW until both marks are equidistant from the 12 o'clock position of the nut...in other words, split the difference between those two marks. The control valve is now centered. Tap the cap back on the valve, install the left-front wheel, drop the car and you're done.
The final adjustment is to turn the nut CCW until both marks are equidistant from the 12 o'clock position of the nut...in other words, split the difference between those two marks. The control valve is now centered. Tap the cap back on the valve, install the left-front wheel, drop the car and you're done.
