Power steering bleeding issues

[Rumi]

Hi

I’ve been searching around and can’t seem to figure out what my next step is.

I just changed the pressure hose and the power steering pump the issue is when I start the bleeding process the fluid will come out of top of reservoir and pour out i can here some bubbles popping initially and then seems like it’s being forced up and out?


Thanks in advance!

 

[Howard705]

leave it running tiny air bubbles are in it like a shook up coke .they are compressed by press and will eventually pop as they sit in the reservoir and lower the level. takes a while . I'd avoid turning it for a while now.

 

[Rumi]

K cool I’ll try!

 

[Rusty Marlin]

Engine running or not running?
I bled mine with the engine off. Jacked up the front tires so my son could swing the wheel.
Definitely had to go slow or the oil would come right up and out of the reservoir. With the pump off there's no pressure in the system so the aeration of the oil is very slight.

 

[BILT4ME]

Read the FSM on this. There's a procedure.

 

[Rumi]

When it’s running definitely lots of bubbles like a coke and that’s when it will force out for now bleeding it with engine off yes?

Ty

 

[Rusty Marlin]

I don't have the FMS in front of me, but IIRCC its 3x lock to lock with engine off and wheels lifted off ground to get the majority of the air out and then 3x lock to lock with the engine on to scavenge the rest. Let it rest an hour and repeat.

 

[BILT4ME]

I placed front axle on jack stands and with engine OFF turned lock to lock 100 times SLOWLY. Yes, overkill.

I had to refill every other cycle until I got to about 20 cycles.

Then I did it with engine ON and repeated the process. I have had no squealing, bubbles or fluid loss since in 75K miles.

 

[Rumi]

K great I’ll try!

 

[jonheld]

Wow. Never had an issue like this on any 80. I replaced high and low pressure lines, the reservoir, and R/R the pump during the process.
Filled the reservoir, started the truck briefly, topped off the reservoir, started the truck, turned left and right 2 or 3 times, checked the level, topped off if needed and drove away. Level hasn't changed over thousands of miles.
The PS system self bleeds as long as you keep the reservoir full.

 

[inkpot]

Wow. Never had an issue like this on any 80. I replaced high and low pressure lines, the reservoir, and R/R the pump during the process.
Filled the reservoir, started the truck briefly, topped off the reservoir, started the truck, turned left and right 2 or 3 times, checked the level, topped off if needed and drove away. Level hasn't changed over thousands of miles.
The PS system self bleeds as long as you keep the reservoir full.

Exactly. Not rocket science to get air bubbles to go up to the highest point in the system. Similar to the cooling system.

 

[IdahoDoug]

Simple, yes. But if you ignore the FSM proper procedure you can make this into a lot of work and time. For instance, start it up while filling and those little vanes will churn the fluid into a milkshake if they have access to air. Which they will instantly if you haven't done the back and forth thing with the engine off FIRST. Once its got air whipped into it, those bubbles will cling to the inside of the hoses, the rack, hydraulics, etc and now its a long process. The oil is thick and tiny bubbles don't move very fast. So for those finding this thread years from now on a search - know the FSM procedure and its a piece of cake.

 

[Rumi]

Hi

So I’ve been going left to right a number of times now as soon as I start up the fluid immediately gets hi in reservoir and now fluid remains at top and hasn’t gone back down?

Thanks