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Roy
Roy, import/domestic specialest
Category: Car
Satisfied Customers: 6175
Experience:  ASE master tech for 40 years
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I have a 2000 ford f250 with 7.3l diesel. This is what

Customer Question

I have a 2000 ford f250 with 7.3l diesel. This is what happened and what I tried so far: Brakes got hard, barely would stop, hissing noise when applied, power steering got hard. Replaced 2 lines that were leaking Replaced brake booster reman - little better
response still hissing Replaced master cylinder new - little better response Replaced power steering pump reman -brakes got worse Replaced brake booster again reman - Brakes got better but still intermittently get hard and always hiss At a mechanics recommendation
replaced power steering fluid w synthetic atf and added limited slip additive- actually helped some but still hissing and intermitant hard brakes
Submitted: 2 years ago.
Category: Car
Expert:  Roy replied 2 years ago.

good afternoon my name is ***** ***** I will assist

do have a vacuum booster or a hydrovac system???

Roy

Customer: replied 2 years ago.
hydrovac system
Expert:  Roy replied 2 years ago.

ok, first. I would look at replacing the power steering pump. you have replaced the master and the hydrovac whcih may have failed from lack of sufficient pressure.

Roy

Customer: replied 2 years ago.
I did replace the power steering pump
Expert:  Roy replied 2 years ago.

sorry, did not see that.

when you flushed the system, was there a lot of debris???

did you replace the pump first or last??? I worry about debris from the old fluid getting into the new components.

Roy

Customer: replied 2 years ago.
replaced pump last, how do you flush power steering system? what should I fill it back with?
Expert:  Roy replied 2 years ago.

remove the return line to the pump and run it. add fluid as it drains into a pan until clear. do this with the hydrovac and steering box as well.

Roy

Customer: replied 2 years ago.
I put limited slip type F synthetic transmission fluid in it. Is this what I should flush with or put just regular power steering fluid in it?
Expert:  Roy replied 2 years ago.

I would use regular power steering fluid

Roy

Customer: replied 2 years ago.
Ran out of time yesterday, and no time today to flush power steering fluid
Expert:  Roy replied 2 years ago.

ok

Customer: replied 2 years ago.
Flush whole thing no improvement
Expert:  Roy replied 2 years ago.

was there a lot of dirt and debris??

Customer: replied 2 years ago.
No fluid was clean.
Expert:  Roy replied 2 years ago.

ok, do you have access to some pressure gauges to test the hydro boost???

Roy