Can anyone tell me what this bleeder valve is for?

 

To bleed air out of the power steering system.

It is also a better way to change the power steering fluid.

 

Thanks Spike, I was wondering how to change the power steering fluid. So if I just open this up all the way do I start the truck till all the old fluid drains out and fill it up with new and wait to see clear fluid?

 

Its a great way to bleed the power steering box. Put a clear hose on that nipple loosen it a quarter turn and put a bowel down there. Start your car and add power steering fluid till it comes out the color of your new power steering fluid. The best and simplest way to change your fluid once every 2 years. I used Royal purple and all my my whining is gone. All DII's require full synthetic power steering fluid.

 

Thanks Boss, much appreciated. Do I leave the cap off the power steering reservoir and fill till it goes clear?

 

Thanks Boss you answered my question while I was asking it.

 

And don't stop the process until you also turn wheels lock to lock to force as much old fluid out as possible. D1 owners remember - you use ATF, not PS fluid. But still a good draining method.

 

Okay Savannah thanks for that info. As of late every time I turn around Im having to order parts for my Disco. When things start to go it seems they all go which I guess is good cause I can do all the repairs at once.

 

I actually took that bleeder out while I drained it.

There were all kinds of little shards that came out when I did...

Just as a general helpful note to you all...

I check/change ALL FLUIDS every year.

Engine oil every 3000.
Trans once a year
Axles Every Year
Dexcool EVERY Year
Transfer Every Year
Brake Fluid Every year
Power Steeing Every year


Your trans, transfer, and rear have moving metal parts. Why leave the metal in the fluids that will result in wearing the parts faster...

Grant it, you might think its overkill, but I usually hit close to 300,000 on a vehicle when I stay on top of it.

My Olds before the HG went had 336,000 on it.

 

I might make a suggestion on a much better way to bleed the entire p/s system, saving you a lot of grief and giving you a much cleaner, better functioning system.
Instead of draining out what you can and refilling then bleeding the system, use a hand pump, empty the reservor, refill it, start your engine and turn the steering wheel both left and right all the way to the stops where the pump will then growl. Turn of the engine, suck out the fluid from the reservor, refill and repeat 3 to 4 times or till the fluid you remove is perfectly clear. For p/s units that have issues such as noise or power issues, I include a bottle of Lucas P/S stop leak to free us internal valve.
Doing this will take you less then 10 minutes, you will not have any mess or bleeding issues to deal with and your steering should be a lot more responsive. The down side, if you want to call it that, is that you will use 4 quarts or more of fluid to flush the system but you will have better results.