- This topic has 8 replies, 3 voices, and was last updated 5 years, 12 months ago by
.
-
Topic
-
i have a 1989 gmc r3500 with a 454 that when its below 1000 rpms the power steering doesn’t work but as soon as you rev it it works.its hydro boost if that helps any.the pump also runs the brakes and as far as i can tell they work fine.should i replace the pump or look elsewhere.also would changing the fluid help any?
-
Replies
-
Guess it is highly likely your hydroboost unit is failing but I like to know if anyone here knows any method to test it out.
[quote=”rahuljones” post=201012]Guess it is highly likely your hydroboost unit is failing but I like to know if anyone here knows any method to test it out.[/quote]
what would the brake hydrobooster stop the steering gear from getting the needed pressure
You would need an in-line pressure gauge to test pump output. Reference the specs in the book.
Personally, I’d change the pump. GM P/S pumps are good but they are known to fail near idle when they get old. They aren’t too expensive and aside from the pulley, pretty easy to do.
I would strongly recommend installing a line filter when you go back together with it.[quote=”Tods213″ post=201034]You would need an in-line pressure gauge to test pump output. Reference the specs in the book.
Personally, I’d change the pump. GM P/S pumps are good but they are known to fail near idle when they get old. They aren’t too expensive and aside from the pulley, pretty easy to do.
I would strongly recommend installing a line filter when you go back together with it.[/quote]whats a good filter ?everyone i look up says they leak
I like the metal magna-pure filters. I’ve had one on my S10 for 8 years. I change the O-ring every 20,000 miles during it’s cleaning. Hasn’t leaked once.
I could be wrong, but I think your vehicle uses a 3/8″ hose for its return line.[quote=”wes104″ post=201021][quote=”rahuljones” post=201012]Guess it is highly likely your hydroboost unit is failing but I like to know if anyone here knows any method to test it out.[/quote]
what would the brake hydrobooster stop the steering gear from getting the needed pressure[/quote]
A minor block from Hydrobooster is what came to my mind as you didn’t mention weak brakes.
- You must be logged in to reply to this topic.