05 F250 6.0 Diesel- I want to flush my power steering fluid. I have sucked as much fluid out of the resevoir as I can. From the front of the vehicle looking down at the resevoir, I see 2 hoses, one on the left, and one on the back/right of the resevoir. Which hose is the return, and what's the other hose? Then the next question is, what's the proper procedure to flush both of these lines? The fluid needs changed bad! I have flushed alot of my other vehicles but have never had one with more than 2 hoses(return and intake)! Thanks for the help!

 

because your diesle has hydro-boost brakes powered from the power steering pump. take one hose off,run the truck and keep filling as it runs out into the bucket.

 

Thanks! And I also found this courtesy of 4x4Mark:

Just a reservoir refill would take several iterations to really clean out the system. I did mine following the instructions below and the only drips are when swapping the hose - slight and easily caught by a rag. Air in the system really isn't an issue unless you ignore the reservoir and let it go dry. I replaced with Mobil 1 ATF. The following is from another contributor at another site:

Supplies needed:
- 2-3 quarts of fresh Mercon/Dexron III ATF (or a synthetic ATF meeting those specs).
- 3/8" inside diameter tubing, at least 3 feet, more is fine.
- shop rags.
- waste oil container (an empty milk jug works great).
- hand vacuum pump or turkey baster (don't use the one from the kitchen or you'll hear about it ) - I used a small syphon hose.
- pliers (to loosen spring hose clamp)
- step stool, tire step, etc. (optional but makes it easier to get at everthing from the side of the truck.)

1) Using a hand pump or turkey baster, suck all of the old fluid out of the power steering reservoir.
2) Fill the reservoir with fresh fluid.
3) Locate the hose that goes from the power steering reservoir to the brake master cylinder. This is a low pressure hose that just uses a spring hose clamp to hold it on to the brake master cylinder, near the top, right behind the brake fluid reservoir.
4) Remove the PS hose from the top of the brake master cylinder and attach a piece of 3/8" I.D. tubing to the nipple on the brake master cylinder and route the tubing to a waste container.
5) Fire up the engine.
6) Pump the brake pedal a few times. This will force old fluid out of the system into the waste container.
7) Top off the power steering reservoir with fresh fluid.
8) Repeat steps 6&7 until you've put 2-3 quarts of fresh fluid into the system.
9) Shut off the engine.
10) Replace the hose on the brake master cylinder.
11) Ensure power steering reservoir is at the proper level.

 

when does this need changing? ( im too lazy to walk downstairs and look in my manual right now)

 

I'm not sure what the recommended interval is, but I know mine smells burnt and looks dark burgundy, not red anymore.

 

I have never ever seen an owner's manual that called for changing the PS fluid, but I change it every 30,000

 

not even sure if there is a noted service interval but any fluid that is dirty and burnt needs to be changed before the components fail no matter what the mileage.