Technical Hydroboost warning for builders

2OLD2FAST · Dec 5, 2020

Boneyard51 said: ↑

When your power steering is in the neutral range, ( no hands on the wheel) the is very little pressure in the system. Just residual pressure from pushing fluid through lines and fittings. As you turn the wheel, pressure comes up according to the resistance of the wheels . The pressure will continue as long as the wheels are turning untill they hit the stop. Then the pressure goes to maximum and the byp*** opens up limiting the pressure to the preset level. Usually between 1200 and 1800 psi.
I used to in stall winches powered by the power steering pump.Awsome winches , by the way.
In order to create 1800 psi in the hydro boost " can" , wouldn't the pump gave to put out 1800 pSI ?

Bones
Click to expand...

Boneyard51 · Dec 5, 2020

Yes, the pump would have to have the ability to produces at least that much pressure. A pump, by itself, does not produce pressure. The flow of the pump has to be restricted! The amount of restrictions and capacity of the pump determines the pressure and flow ,ie GPM.

Not sure what you are referring to as a “can” .

Bones

2OLD2FAST · Dec 5, 2020

Ac***ulator canister

anthony myrick · Dec 5, 2020

gimpyshotrods said: ↑

It's a messed up manual box.
Click to expand...

Ok.
I guess another factor for mine steering well is the skinny, 14 ply 8R tires

nosford · Dec 6, 2020

nosford said: ↑

As mgtstumpy shows in his post with the flow diagram that is how I have seen every one hooked up I have dealt with. There was a flow/pressure test tool we used with several adapters to find restrictions in the system. If there was a problem with the power steering box/rack and it caused a restriction we would sometimes see a "self application" of the brake pedal due to the buildup of pressure being more than the hydroboost returm line could flow. Symptom would be the brakes would start dragging as you drove, if you stopped and shut off the engine and pumped the pedal a few times it would bleed of the pressure and you could drive a few more miles. Normal pressure to the power steering box without moving the steering wheel would be 75 to 125 psi, if you held the steering against full lock it would spike over 900 psi. Dead heading the pump (closing the line with a valve on the tester) would spike to about 1400 psi, that was the pressure relief valve byp*** point in the pump itself. This was all done on a Dodge with a ***mins diesel and is from the service manual. So as someone pointed out, lots of flow WITHOUT restriction = low pressure. Restrict flow = high pressure. Some cars even have a variable flow power steering pump that change flow with RPM, slow rpm (like parking) high flow high pressure, higher RPM low flow, less ***ist but not used with hydroboost.
Click to expand...

If anyone is interested this is the tool that was used to test pressure/flow from the Dodge Ram service manual. OTC is the high quality version but there are lesser cost versions if you look around. https://www.otctools.com/products/heavy-duty-power-steering-pump-****yzer

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Technical Hydroboost warning for builders

2OLD2FAST
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Boneyard51
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2OLD2FAST
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anthony myrick
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nosford
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Technical Hydroboost warning for builders

2OLD2FAST Member from illinois

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2OLD2FAST
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from illinois

Boneyard51
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from Muskogee, Oklahoma

2OLD2FAST
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from illinois

anthony myrick
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from Somewherin The Twilight Zone dodododo

nosford
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from Rickreall, Or