Hydroboost Install

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BluHoe96

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Decided to make a new thread here after my problems with the brake pedal. Ok, so I finally finished my hydroboost install on my 4 dr. It was a learning process for me so it took me a few days since I would start late in the afternoon and also need to run to the auto parts store a few times. However, I think that all in all I must have spent about 8 hours on the whole install.

Things that slowed me down:

1. Finding the right pedal, apparently my first pedal was from an 88-90 truck and didn't clear the steering column nor did the stub fit the brake switch (will touch on this later.)
2. Threading in the new ps lines. PITA to start the threads, especially in back of the pump.
3. Definitely BENCH BLEED the MC. Since I didn't do this I had absolutely no brakes after the install. Ended up taking off the lines from the MC and bleeding it on the booster. Definitely do some research on this process. I still feel like I need to bleed some more, but overall feel is definitely improved and I can FINALLY lock up my huge 285's!

Materials purchased and cost:
1. Hydroboost and pedal (apparently from wrong year truck.) - $150
2. Correct pedal from a 95' 3500 HD dump truck - $30
3. Duralast pwr steering lines from Autozone sourced for a 98 Suburban 2500 ~ $100
4. Brass T-fitting and hose clamps originally for PT on garbage truck - Free from a good friend!
So all together I spent just under $300 bucks for the install since I used OEM lines and my original ps pump to save money. Not bad for a HB install, right?

Here is a pic of the finished product:
DSCN0896.jpg

Pic of the correct HB pedal (Part# S 15953991) below the original VAC assist pedal.
DSCN0884.jpg

Part# for ps hose coming from HB going to the steering box.
DSCN0888.jpgDSCN0889.jpg

Part# for ps hose coming from the back of the pump to the HB
DSCN0891.jpgDSCN0892.jpg

Part# for return hose coming from the HB to my custom T-fitting that ties in the return from the steering box and the ps pump reservoir.
DSCN0894.jpg
DSCN0895.jpg

Finally a pic of all three lines on the HB. Front line is the low pressure return. Rear line goes to the steering box, and the back left line comes from the back of the ps pump.
DSCN0897.jpg

I know this isn't a full step by step, but maybe this can help you guys out if you are not willing to spend money on expensive Hydratech lines or something of that sort. My main focus on the setup was purely for functionality since it is a work truck and aesthetics was way down the list.
 
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Stresst

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I see alot of talk about hydroboost, I know its brake related but can someone tell me in a nutshell what the hell everyone is talking about??
 

Mac

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A force multiplier...in a nutshell:)
 
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BluHoe96

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It replaces the vacuum booster on the firewall (big round drum looking piece) to a hydraulic assisted booster running off of the power steering pump for more clamping force on the brakes. Way better solution than spending a grand or more on a big brake setup.
 

99Yuk

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...I know this isn't a full step by step, but maybe this can help you guys out if you are not willing to spend money on expensive Hydratech lines or something of that sort. My main focus on the setup was purely for functionality since it is a work truck and aesthetics was way down the list.

Man that's awesome!

A few of us are interested, but had no real good idea of how to start and what would be suitable donor vehicles, etc. Well me at least! You may be motivating me to get off my ass and start looking for parts. Haha...

Good to see you've got it all working!
Kudo's to you!
 

sparg93

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BlueHoe - does your tahoe have variable steering?

If so, have you noticed any "pulsing" or "ticking" in the steering wheel while turning or brake & turning?
 
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BluHoe96

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No sir, no variable steering, ticking, or pulsing. From what I heard I think that was only available on 97 and up models. Mine is a 96. Funny you bring up steering feel though, the wheel did get slightly heavier, but not by much. I was equating it to the fact that the fluid had so much more to travel now than before. Also, I felt the lines after about a 10 minute drive and noticed that they were pretty hot to the touch. When does pwr. steering fluid boil? Also, where should the temp. be on these setups? Oh yea, one more thing. The clip that was on my original pedal holding in the eyelet and the brake switch doesn't seem to fit right on the HB pedal (nub on the end of the stub is shorter). Is there a different type of clip I need to get?
 

bambam

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so when you do this conversion when you say heavier steering asin it feels more like non power steering or what do you mean also does it make steering less responsive
 

sparg93

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I could make a few guesses...but i honestly don't really know the answers to your questions and don't want to mislead :)

Look up the power steering fluid you used and there should be a spec sheet somewhere indicating the boiling point. Now how to measure the temp your PS fluid is getting up to is another story...maybe you can take a heat gun to the high pressure line?? (but i'm not sure how heat will be conceled by the lines)

One way to check if you're burning your PS fluid...change the fluid until it's clear and then check back in a few weeks. If it's a much darker color, you're burning it :)
 

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