HydroBoost!

[Trooperrob85]

Going to convert my bobber to hydroboost soon. I have a Waterloo power Steering setup. So if your familiar with the plumbing it has a gear pump off the IP. So I see a lot of systems plumb the pressure side through the hydro Boost first, then through the gearbox. Does it matter which gets plumbed first?

 

[HanksDeuce]

Here's my hydroboost install page:
https://www.hanksdeuce.com/hydroboost_install.htm

The high pressure line from your power steering pump goes into the hydroboost unit. Then high pressure comes out and goes to the steering rack. Then you have (2) low pressure lines that tee back to the reservoir. Lastly, you have a suction line from the reservoir to the pump. Based on this routing, it looks as if the brakes are priority, then the steering gear box.

 

[cbrTodd]

As HanksDeuce pointed out, with hydroboost the brakes get high pressure first, giving them priority. However, what you shared a picture of is one of the Bosch Hydromax units. They are similar to the hydroboost units but they are bigger and were used on medium duty trucks instead of pickup trucks. They also used an electric motor as a backup in case the engine stops running, where as the hydroboost has a hydraulic pressure accumulator vessel.

On the two donor trucks I have dealt with, both mid 90's Ford F700s with 6bt engines and Hydromax brakes, they actually had separate power steering pumps for the brakes. The gear driven pump drove only the steering gear, and a separate belt driven pump drove the Hydromax system. I'm not sure how much of a performance impact you will see from using a single pump to supply both systems, but I am guessing the extra hassle of having two power steering systems was done for a reason.

 

[7bdiver]

Well, crap. I was going to do my power steering project first, then the hydromax. I don't really think you would have a problem routing to the steering first, especially if you have the backup motor on there just in case. I was thinking the other day about having both on a shared pump though. You sure don't want to lose steering and brakes at the same time due to a rupture. The backup pump will probably give you a couple seconds before it runs out of fluid, but yeah...

I will have to consider this

 

[Trooperrob85]

Well, crap. I was going to do my power steering project first, then the hydromax. I don't really think you would have a problem routing to the steering first, especially if you have the backup motor on there just in case. I was thinking the other day about having both on a shared pump though. You sure don't want to lose steering and brakes at the same time due to a rupture. The backup pump will probably give you a couple seconds before it runs out of fluid, but yeah...

I will have to consider this

The Bosch Hydro max manual I found says to route it through the steering gear first.

 

[davidb56]

some systems used a accumilator for emergency braking.

 

[rustystud]

Most new vehicles use a dual pump system. The front half powers the steering while the rear half powers the brakes or auxiliary hydraulic systems like engine fans and such.