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hydro-boost Q's

neverendingproject

neverendingproject

1/2 ton status
Joined
Jul 24, 2005
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Location
Tulsa, OK
First off, I have heard nothing but wonderful things on the hydroboost conversion, so I said to myself, "self, we are going to try this."

So here is what I have. I pulled a hydro-boost unit from a 85 one ton. I have stock brakes on my 84, and soon I will go to rear disc conversion.

So here is what I need. I need to know if the MC is a good one to use, should I expect any problems, where can I get a rebuild kit and a power steering pump, will it work with my current brakes and future 4wdb?
 
When i swapped the 6.2 diesel into my truck I also swapped the Hydro-boost. The 1/2 ton MC did not fit the hydro-boost unit I got from a one ton...so I swapped the MC as well. Also installed the rear disc brakes while I was at it. I have great pedal feel and the truck stops quickly and easily without early lock-up in the rear. i can threshold brake quite easily.

For the pump, ask for a pump from a K30 with a small block.

Rene
 
I got the whole HB unit from the truck, lines and everything. Where do i get a new pump? I would like to not go through the stealership.
 
The only difference in the pump is the canister... it has one extra return line fitting. You can get one at a wrecking yard.

OTOH, if you can braze or weld, you could add the extra fitting yourself. ;)
 
u2slow said:
The only difference in the pump is the canister... it has one extra return line fitting. You can get one at a wrecking yard.

OTOH, if you can braze or weld, you could add the extra fitting yourself. ;)
Click to expand...

yep found that out after spending $90 for one at Autozone.

my billet pulleys require a keyed shaft, so i was just going to swap the reso's, need to head back to the PnP to get a $10 reso and return the $90 pump.
 
search the forum... youll find my post "finally better brakes for the v3500"... then go to the tech section and look for the post "why hydroboost brakes" ... between the two it should answer all your questions

cam
 
neverendingproject said:
I got the whole HB unit from the truck, lines and everything. Where do i get a new pump? I would like to not go through the stealership.
Click to expand...
I would get a pump made for a hydroboost system. I was running a regular pump for a while and I found that I could turn the wheel faster than the power steering could keep up, especially with brakes applied. When I went back to a hydroboost pump that went away.

Like Rene said, get a pump for a C30 or K30 with hydroboost. If you need serpentine just specify a 1990. That's is what I'm running.

Also another note of experience. I've decided that from now one I'm getting my pumps new from the dealer. Yeah it's more money, but I lost a pump that was less than a year old on the trail. No power brakes or steering sucks. The pump was a reman from Carquest. The shaft pulled right out the front of the pump. In the future I'll spend the extra money for a new unit that won't require trail side repair and my wife running all over the mountains to find a store with a pump in stock.
 
my advice is to replace all the lines going to and from it. Ive had issues with the stock ones cracking and making me loose fuild out on the trail.
 
i just checked, for an 84 k5 and k30, partsamerica.com list the same pump part #, only # thats different is if you get the reso with it or not.
 
That was what I had found out initially also, because I was using PartsAmerica.com too. I'm pretty sure that Carquest had different part numbers, but that could be because I ordered it with the reservior.:dunno: I think if you read one of the posts camsk5 referenced, it says that the hydroboost pump runs at a higher pressure. I know it made a difference for me.
 
Okay so I found a hydro boost power steering pump at my uncles junkyard, but it came off a diesel.

My question is whether or not the mounting holes for the diesel p/s pump are the same for the sbc. I am also curious to see if anyone has rebuilt a pump or booster themselves, and how hard it is.

Thanks
 
Just a thought; but you could always just change the relief valve at the back of the pump (the one behind the high pressure hose). I would bet that the only real difference between Hydraboost steering pumps and just steering pumps.
 
DieselDan said:
Just a thought; but you could always just change the relief valve at the back of the pump (the one behind the high pressure hose). I would bet that the only real difference between Hydraboost steering pumps and just steering pumps.
Click to expand...

Bingo!

Just modify or replace that regulator, and either install a second return line, or I have seen in several instances where you can use a T fitting where one branch goes to the hydro-boost, the other to the steering box, and the third back to the pump.

I'll be doing this swap pretty quick myself, I just traded a 14 bolt for a complete hydroboost setup less the pump :)
 
I'd imagine it will fit, but if it doesn't, it should be easy enough to swap the pump's brackets around with your existing one.
 
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