I know it is power steering pump. but after refilling w/ p/steering fluid. the fluid foams up and is forced out of container. I understand the noise, but the foaming tells me that I am 'sucking air' into the p/steering system somewhere. thoughts?
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If you are saying it is coming out the top of the reservoir, the problem is that there is air in the power steering system. When you run the engine the fluid gets pumped into the rack where any movement tries to turn it to foam, forcing the fluid out of the reservoir. It also makes noise.
Power steering systems are often hard to burp. The basic process is to put the front of the car on jack stands so the front wheels are off the ground and let the engine idle as you turn the steering wheel all the way left and right a few dozen times. The fluid level has to be kept high enough to prevent more air from being drawn in.
Sounds like a bad replacement rack.. Did you buy a rebuilt rack? Look up the number for A1 Cardone.. They are in my openion the best rebuilders of rack and pinion.. You can talk to their tech team and they can answer your question.. I have never seen this problem.. i have had racks that the internal valves have went bad and lock up the rack and pump.. Post a comment here and let us know what you find so we will know too.
I doubt it. Usually when the pump fails it smokes the belt. If the steering wheel will not turn and the fluid is contaminated, I would say the problem is the gear box or rack and pinion depending on the make model and year.
no power steering fluid would cause the pump to overheat, damaging seals. the foam might have been pump cavitation causing injestion of air in the fluid, (makes the hydro fluid "frothy") spraying ANY lubricant on the belts will cause them to slip and make a squeaking/squealing noise.
check the location of the leak, wipe down the hoses (cheap causes for leaks) fill the power steering. put some newspapers under the car, start the car, turn the wheels lock to lock, shut off car, check for leaks, should tell you if it is a hose or connection, or rack unit
First, you need to make sure you are using the right fluid. Your system call for Dexron II or Dexron III automatic transmission fluid. Other fluids may "cavitate" or "foam" in your system and cause the whining noise you are describing.
Then, when bleeding the system, you need to let the foam settle for half an hour or more between "bleedings".
Start the engine, turn the steering wheel full lock left and right about 3 times. NOTE: When at full lock, hold the wheel there for about 3 seconds before turning in the other direction. (this will force fluid to flow through the pressure relief valve in the pump.) DO NOT hold at full lock for longer than 5 seconds - system damage can occur.
Then shut the engine off and wait for the foam to settle, (about 1/2 hour)then repeat. It may take 4 or 5 times to get all the air out so it doesn't make any more noise. Also note that normal driving of the car does nothing to get the air out. The fluid must be forced through the pressure relief valve to have enough pressure/flow to release the air trapped in the rack and pinion unit.
1.check belt not too loose/tight
2.turn wheel over full lock and hold for about 30 secs then other lock.
that is about all you can do(whining noise normally associated with pump clutch,steering wheel would vibrate as you turn if it had air in system).to bleed the pump you loosen the out pipe on full lock,then tighten when fluid appears.
Hello hummelsautob. Changing the power steering cooler can't allow air into the brake system. Two different fluid systems. Your F250 has it's brake assist powered by the power steering pump. Instead of using a vacuum assist it uses the hydraulic power from the pump. When refilling your pump you have gotten air mixed in with the fluid. This turns it into a consistency something like whipped cream. When in this state it isn't effective. Let it sit for a couple hours and let the air bubble out of the fluid. Recheck your level after this as it will drop. This will make your brakes feel normal again. Just a note on adding fluid to an empty power steering pump. Add fluid to the reservoir but not to the top, turn the steering wheel back and forth slowly with the engine off. This will keep the fluid from foaming.
if gets low definitely a leak foam is pump mixing fluid with air roar is pump cavitation check lines or pump for leak keep fluid at recommended level air bound unit can cause steering difficulty and or failure if need have trained mech look into problem
To find out witch it is,pump or rack and pinion,break loose the presure line on the power steering pump with a wench.Start the car and turn the steering wheel back and forth,you may need to loosen the nut on the power steering hose two or three turns to get the fluid to shoot out.It should come out pretty forceful.If it doesn`t,then replace the pump.If it does come out really powerful,replace the rack and pinion.