Guys I need help
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5th Gear
Joined: Mar 2023
Posts: 5
Likes: 2
Guys I need help
Lost brakes and power steering awhile back. Replaced ps pump. The old one had the pulley shaft shear off inside the body of the pump. What could cause that? The new pump worked for a day. Had power steering and brakes for a bit but after I had to brake heavily one time, right back where i started. When rpms are up i can steer normal but as soon as I slow down its back to no power. Brakes go to the floor and dont really grab unless i pump. Im recently off grid and this is my only vehicle. I need to figure this out or I'm screwed.
Fleet Mechanic
Joined: Sep 2011
Posts: 1,613
Likes: 106
From: Albuquerque
Lost brakes and power steering awhile back. Replaced ps pump. The old one had the pulley shaft shear off inside the body of the pump. What could cause that? The new pump worked for a day. Had power steering and brakes for a bit but after I had to brake heavily one time, right back where i started. When rpms are up i can steer normal but as soon as I slow down its back to no power. Brakes go to the floor and dont really grab unless i pump. Im recently off grid and this is my only vehicle. I need to figure this out or I'm screwed.
Is it possible you have debris in the line? maybe one of the hoses if faulty now, gonna have to go through the system and find the fault!
it took me 3 times to get a pump that didn't squeal!
Thread Starter
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5th Gear
Joined: Mar 2023
Posts: 5
Likes: 2
I forgot to mention I did a flush after replacement. Also, my brake pads need to be replaced. If pads are worn too much, is it possible for the throw of the calipers to get overextended and cause them to get locked up or effect the hydroboost function at all?
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
How about just some air in the system? The system itself holds way more than just what the reservoir can hold. Have to fill the tank, turn steering side to side multiple times. Refill. Go drive it. Refill. You get the picture. If you keep having to add fluid, there's a leak somewhere.
Lead Driver
Joined: Jul 2017
Posts: 6,853
Likes: 2,330
From: WV
How about just some air in the system? The system itself holds way more than just what the reservoir can hold. Have to fill the tank, turn steering side to side multiple times. Refill. Go drive it. Refill. You get the picture. If you keep having to add fluid, there's a leak somewhere.
https://m.youtube.com/watch?v=-TSw2Qlzsx8
It's a Van Gogh
Joined: Feb 2010
Posts: 7,802
Likes: 1,333
From: Elk Grove, CA
The volume of brake fluid in the reservoir is adequate for complete wear of the pads. If the pads are fully gone you will hear loud very bad scraping noises as they destroy the calipers.
Or if you ignore those horrible noises and destroy the calipers and pads and run the pistons down to the disc, yeah maybe.
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Hotshot
Joined: Jul 2008
Posts: 12,782
Likes: 2,142
From: N.GA Mountains
No.
The volume of brake fluid in the reservoir is adequate for complete wear of the pads. If the pads are fully gone you will hear loud very bad scraping noises as they destroy the calipers.
Or if you ignore those horrible noises and destroy the calipers and pads and run the pistons down to the disc, yeah maybe.
The volume of brake fluid in the reservoir is adequate for complete wear of the pads. If the pads are fully gone you will hear loud very bad scraping noises as they destroy the calipers.
Or if you ignore those horrible noises and destroy the calipers and pads and run the pistons down to the disc, yeah maybe.
Not likely the problem described here.
Could be a problem with hydro boost?
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Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
My vote is air in the system. I had what sounds like an identical problem after my F53 pump retrofit. Any time rpm would drop to idle I would loose all assist to steering and brakes. A member here suggested I pull a vacuum on the reservoir at the fill neck. I ran a tube through a hand primer bulb from a vacuum pump to seal around the filler and started pumping. It wasn't a perfect seal but enough to draw some vacuum on the system. Repeated the process 2-3 times then topped everything up, and problem solved.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
These power steering pumps are high enough volume to be self purging. Need to check the level while engine is running for a bit. The Hydroboost will have enough reserve to overfill the power steering reservoir if you repeatedly pump the brake pedal with the engine off if you have all the air worked out of the system and the tank up to the dipstick.
Thread Starter
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5th Gear
Joined: Mar 2023
Posts: 5
Likes: 2
I just put new brake pads all around. I'm going to do a second flush of the ps system in the morning. Last time it did look like i had some tiny air bubbles pushing out of the return valve off of the hydroboost. This time I will keep pumping the atf thru until its totally bubble free. Thanks guys for your input. I'm brand new to doing any mechanic work myself but being about 50 miles off grid, I dont have another option. The collective knowledge of this forum is a lifesaver and truly appreciated
Laughing Gas
Joined: Jun 2013
Posts: 1,089
Likes: 513
From: Yokosuka Japan
I just put new brake pads all around. I'm going to do a second flush of the ps system in the morning. Last time it did look like i had some tiny air bubbles pushing out of the return valve off of the hydroboost. This time I will keep pumping the atf thru until its totally bubble free. Thanks guys for your input. I'm brand new to doing any mechanic work myself but being about 50 miles off grid, I dont have another option. The collective knowledge of this forum is a lifesaver and truly appreciated
Get back to us and let us know the results. Some of us are newbs in regards to the braking and power steering system so you return input is greatly appreciated.
Ken
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Figured I'd start w/ the basics.
My smarta** DNA just couldn't let that opportunity pass by. I'll try to behave now.
It's a Van Gogh
Joined: Feb 2010
Posts: 7,802
Likes: 1,333
From: Elk Grove, CA
Thanks guys, I needed a chuckle.