Power Steering Pump & Hydroboost
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Laughing Gas
Joined: Sep 2003
Posts: 852
Likes: 12
From: Billings, MT
Power Steering Pump & Hydroboost
How are the power steering pump and hydroboost tied together? The reason I am asking is that my PS pump is making noise and my brakes don't feel as firm as they usually do. I am thinking of changing out the pump and flushing the system.
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
Yes like Alan said the powersteering pump provides the pressure to the the hydroboost system. When I did my flush my brakes got better too.
I have a video on how to do the flush procedure, and there are text-based write ups as well.
I have a video on how to do the flush procedure, and there are text-based write ups as well.
Posting Guru
Joined: Aug 2010
Posts: 1,002
Likes: 1
Yes it can, I just replaced my pump earlier this year, I also had a high pressure line leaking, now after getting it all fixed back up, it looks like my Hydrobooster has started leaking behind the master cylinder. It is always something with these trucks.
The powersteering pump pressure feeds to the Hydrobooster first, then the other high pressure line feeds down to the steering box, there are 2 low pressure return lines, one from the hydroboost and one from the steering box, both of those return to the pump reservoir. If you replace the pump make sure you replace the white nylon washer that is on the high pressure line, as that is what seals it. Just a tip, the high pressure line fittings will move some even when they are tight.
The powersteering pump pressure feeds to the Hydrobooster first, then the other high pressure line feeds down to the steering box, there are 2 low pressure return lines, one from the hydroboost and one from the steering box, both of those return to the pump reservoir. If you replace the pump make sure you replace the white nylon washer that is on the high pressure line, as that is what seals it. Just a tip, the high pressure line fittings will move some even when they are tight.
Elder User
Joined: Mar 2004
Posts: 580
Likes: 0
From: Chippewa Falls, WI
You could try flushing again if the fluid is really dark in color. Should be a nice bright cherry red like new tranny fluid. Is there a chance you got any air into the system? That could cause what you describe too. If the fluid is nice and clean and there is no air than you probably need a pump.
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