1qwiksearchindex Quick Search

Power Steering Control Valve Re-sealed.

How to Menu


Besides leaking transmission fluid all over your garage floor, running your power steering pump ''dry'' will cause it to succumb to premature failure due to wear.

Leaking in the steering system can be caused by a variety of reasons. Power steering hoses can break if routed incorrectly, ram cylinders seals can develop leakage as well as the control valve seals. Rusted or damaged components can also contribute to fluid loss.

Power Steering control valve rebuild kits specify use of auto trans fluid in the system as clear types of power steering fluid voids warranty due to the seals incompatibility.


controlvalve 002controlvalve 004controlvalve 005

Although fluids should be confined within the control valve, seals can allow seepage from either end of the valve.

controlvalve 006controlvalve 007controlvalve 009

Ball stud socket usually needs replaced as it can wear to a point as to jeopardize safety. This one was replaced in the not so distant past and still felt snug. Jack up the vehicles front, use jackstands. Be safe.

controlvalve 012controlvalve 015controlvalve 019

'65-66 Mustangs came with a lightweight ratchet style lug wrench. The handle end was designed to pry off wheel covers.


controlvalve 020controlvalve 023controlvalve 025

Between fluid leakage and dusty conditions,a cast had formed that incrusted this specimen. Removal of the two cap retaining screws illustrates loss of fluid past the outer seal. Remove retainer nut to disassemble outer spring and spacer parts.


controlvalve 026controlvalve 027controlvalve 031

Keep parts together and inspect & clean every piece. Unscrew ram hoses and allow fluid to drain into pan.


controlvalve 037controlvalve 038controlvalve 039

With a 1/2'' wrench remove the two bolts that secures control valve to the tie rod and slide assembly from socket.


controlvalve 044controlvalve 046controlvalve 047

Remove spool and seals/ Disassemble control valve, inspect. This piston (spool) suffers from a rusty and worn sealing area. Valve's bore survived nicely,without any rust pits that could command complete valve replacement.


controlvalve 056controlvalve 058controlvalve 060

Spool of excellent quality was found in my ''used control valve'' parts box. Good parts are getting harder to find.


controlvalve 067controlvalve 068controlvalve 072

Automotive Associates (Redding's oldest engine rebuilder) kindly allows me to use their non caustic psrts washer.


controlvalve 079controlvalve 083controlvalve 062

Wire brush follows with a light mist of natural toned paint. Allow paint to dry before reassembly. Keep it clean!


controlvalve 084controlvalve 085controlvalve 087controlvalve 088

Use clean trans fluid to lube valve and piston,then slide it on in.


controlvalve 089controlvalve 092controlvalve 093controlvalve 095

Don't damage the seals during assembly. I use only fingers to install the correct seals from rebuild kit.


controlvalve 096controlvalve 099controlvalve 100controlvalve 097

New O-rings go on the aluminum reaction plugs after the piston, washer, and springs are installed in valve.


controlvalve 102controlvalve 101controlvalve 108controlvalve 112


Keep everything clean and lubed for best results. Power steering is serious business, don't take chances.


controlvalve 115controlvalve 118controlvalve 122


Ford employed a hose clamp @ the tie rod to anchor power steering hard lines, to prevent metal fatigue and cracking.


controlvalve 123controlvalve 128controlvalve 137


Install the control valve back on the tie rod and tighten all the lines. Grease tie rod at the bottom center of socket area.

controlvalve 139controlvalve 141

Fill system with fluid. Stop to check level in reservoir before the full quart is empty. Look for leaks. Check for hoses binding in use by turning wheels side to side.

Pull the coil wire from coil and distributer cap and crank engine over about ten revolutions center front wheels, top off steering fluid to correct level. Do not overfill or it will puke out any excess when fluid reaches operating temperature from expansion.

Replace coil wire and start engine, don't reach through the steering wheel when starting , it can break your wrist if proper procedures were not followed! Check for binding, hoses rubbing, proper operation and leaks.

Double check fluid level.

Wheel covers have an extra large access hole for the valve stem.

Good job, now lets see how well it works on the road.

Top of Page