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power steering not working

wes104

New Member
Messages
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Location
oklahoma
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 hydraulic brake booster or look elsewhere/would a bad brake booster block fluid to the steering gear?sorry if this is the wrong place
 

Will L.

Well-Known Member
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Boulder City Nv
Welcome Wes. Start with simple first.

Good belt, good tension? Slipping belt on the pulley can cause that.

Are the brakes working properly?
What condition is the fluid (needing flush and fill maybe) and is it full?

Pressure relief valve clean?

I have seen a bunch of people start throwing parts at it, next thing ya know the whole system has issues. Get the pressure gauges and dig up the procedure for testing pressure and volume.

If/when you do start replacing components: only replace one item at a time. Do NOT get rid of old parts until everything is fixed and you have driven it a couple weeks. Even if core charges exist, wait for the refund because a lot of new defective parts in the steering system components.

I wish I had the test procedure and specs around for you, but it has been too many years since having done that.
 

wes104

New Member
Messages
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2
Location
oklahoma
good belt and my truck doesnt hand a tensioner.its full on fluid but could use a flush probably.were would the Pressure relief valve be?brakes work fine just doest have no steering assit at low rpms
Welcome Wes. Start with simple first.

Good belt, good tension? Slipping belt on the pulley can cause that.

Are the brakes working properly?
What condition is the fluid (needing flush and fill maybe) and is it full?

Pressure relief valve clean?

I have seen a bunch of people start throwing parts at it, next thing ya know the whole system has issues. Get the pressure gauges and dig up the procedure for testing pressure and volume.

If/when you do start replacing components: only replace one item at a time. Do NOT get rid of old parts until everything is fixed and you have driven it a couple weeks. Even if core charges exist, wait for the refund because a lot of new defective parts in the steering system components.

I wish I had the test procedure and specs around for you, but it has been too many years since having done that.

good belt and my truck doesnt hand a tensioner.its full on fluid but could use a flush probably.were would the Pressure relief valve be?brakes work fine just doest have no steering assit at low rpms
 
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Location
alaska
I does have a tensioner just not an auto tensioner. So is it properly tensioned would be the question? Those early v belt systems were problematic to say the least especially on the diesels, which you don't have
 

wes104

New Member
Messages
14
Likes
2
Location
oklahoma
Welcome Wes. Start with simple first.

Good belt, good tension? Slipping belt on the pulley can cause that.

Are the brakes working properly?
What condition is the fluid (needing flush and fill maybe) and is it full?

Pressure relief valve clean?

I have seen a bunch of people start throwing parts at it, next thing ya know the whole system has issues. Get the pressure gauges and dig up the procedure for testing pressure and volume.

If/when you do start replacing components: only replace one item at a time. Do NOT get rid of old parts until everything is fixed and you have driven it a couple weeks. Even if core charges exist, wait for the refund because a lot of new defective parts in the steering system components.

I wish I had the test procedure and specs around for you, but it has been too many years since having done that.
I does have a tensioner just not an auto tensioner. So is it properly tensioned would be the question? Those early v belt systems were problematic to say the least especially on the diesels, which you don't have
yes it has 2 belts and both have been checked and are tight
 

wes104

New Member
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Location
oklahoma
if it is a weak pump wouldnt it affect brakes to and not just steering?leaning towards pump because it is a remanufactured pump and everyone says they go bad quickly
 
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Location
alaska
One other thing you should considering putting on your system is a magnetic filter. IIRC member warwagon had a parts store pump dust his entire system with metal and then had to replace evrything. Maybe flush the new pump first
 

wes104

New Member
Messages
14
Likes
2
Location
oklahoma
One other thing you should considering putting on your system is a magnetic filter. IIRC member warwagon had a parts store pump dust his entire system with metal and then had to replace evrything. Maybe flush the new pump first
would i need to put one on each return line?any specific one you recommend?
 

wes104

New Member
Messages
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Location
oklahoma
just trying to figure out if it is the pump why is steering the only thing affected.and also wanted to say thank youguys for the help so far
 

Will L.

Well-Known Member
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Location
Boulder City Nv
Being a reman, I would keep it high on the possibility list.

If it is a 1 year warranty, you might try swapping it out quickly under warranty before you miss the date and no warranty left.

Normally i would say track down a pressure test kit and find the specs, and ensure dojng every step the proper way, not throwing parts at it— but free under warranty before time runs out...
 

wes104

New Member
Messages
14
Likes
2
Location
oklahoma
Being a reman, I would keep it high on the possibility list.

If it is a 1 year warranty, you might try swapping it out quickly under warranty before you miss the date and no warranty left.

Normally i would say track down a pressure test kit and find the specs, and ensure dojng every step the proper way, not throwing parts at it— but free under warranty before time runs out...
its lifetime
 

Will L.

Well-Known Member
Messages
8,703
Likes
8,528
Location
Boulder City Nv
Score.
I know them and other autoparts store do the free tool rental wher you buy it, use it, return for refund. Find out if they have the pump test gauge kit.
 

wes104

New Member
Messages
14
Likes
2
Location
oklahoma
Score.
I know them and other autoparts store do the free tool rental wher you buy it, use it, return for refund. Find out if they have the pump test gauge kit.
first i want to try a good flush sinch its the easiest and would removed any bad oil befor using a new pump.does any one have any idea how much fluid i would need
 
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