Power steering

[RRTom]

I have noticed that at idle, the power steering assist is minimal. Increase the RPMs and the assist improves. Where this becomes a problem is on curves when I increase or decrease acceleration, as the steering input then has to be increased or decreased.

Is this normal? I have never experienced this in any other vehicle.

[Terryallan]

Chum lee wrote:

FIRE UP wrote:

Terryallan wrote:
Actually it should be easier to turn at slow speed. "most" have "speed sensitive" steering. Means as you go faster, the power assist drops off. This is to make it safer at speed.

Wow,
It took how many answers for an accurate one to appear!!!!!! Yes, power steering in many, many vehicles, boats and more, ARE VARIABLE! The power steering systems in use for years now have multiple inputs for finite adjustments at given speeds and engine rpms. Some are called "Speed sensitive Steering" and other manufacturers call their steering systems other names. Steering parking lots is much more assisted than at any speed higher.

And, just because you're in a turn, on county road or, freeway or any other predicament where a turn of the steering wheel is needed, don't think you're gonna get "parking lot" assist, ain't gonna happen. The vehicles speed sensor(s) are putting in input to the BCM or, body control module as some mfgs call it, Jeep calls it the TIPM, or, Totally Integrated Power Module.

All those things do is, monitor all the driving situations, component operations and vehicle input and, them assist the driver in what they may need and or request, in given situations. Another prime example is "SCV" or, Speed Controlled Volume in many of todays (and for years actually) vehicles radios. The higher the speed the vehicle is driving, the more outside influence on the quietness of the inside of the vehicle. So, the sensors sense all this stuff and, as a result, TURN THE RADIO UP. And, as the vehicle slows down, so the radio volume decreases too. Heck, even my Honda GL 1800 Goldwing motorcycle has that.

So, yes, power steering DOES fluctuate in assisting power.
Scott

Yes, you are correct. But, now I'm confused. What does your post have to do with the OP's initial question about excessive no/slow speed steering wheel effort concerning his new F-53 chassis?

Chum lee

I posed as well to alert the OP that he does indeed have a problem. That the assist improving at higher RPMs is not normal. With Speed sensitive steering, you really shouldn't notice a difference in the effort it takes to turn the steering wheel. At speed. Less effort is needed to turn the front tires, so power assist is less.

[FIRE_UP]

Chum lee wrote:

FIRE UP wrote:

Terryallan wrote:
Actually it should be easier to turn at slow speed. "most" have "speed sensitive" steering. Means as you go faster, the power assist drops off. This is to make it safer at speed.

Wow,
It took how many answers for an accurate one to appear!!!!!! Yes, power steering in many, many vehicles, boats and more, ARE VARIABLE! The power steering systems in use for years now have multiple inputs for finite adjustments at given speeds and engine rpms. Some are called "Speed sensitive Steering" and other manufacturers call their steering systems other names. Steering parking lots is much more assisted than at any speed higher.

And, just because you're in a turn, on county road or, freeway or any other predicament where a turn of the steering wheel is needed, don't think you're gonna get "parking lot" assist, ain't gonna happen. The vehicles speed sensor(s) are putting in input to the BCM or, body control module as some mfgs call it, Jeep calls it the TIPM, or, Totally Integrated Power Module.

All those things do is, monitor all the driving situations, component operations and vehicle input and, them assist the driver in what they may need and or request, in given situations. Another prime example is "SCV" or, Speed Controlled Volume in many of todays (and for years actually) vehicles radios. The higher the speed the vehicle is driving, the more outside influence on the quietness of the inside of the vehicle. So, the sensors sense all this stuff and, as a result, TURN THE RADIO UP. And, as the vehicle slows down, so the radio volume decreases too. Heck, even my Honda GL 1800 Goldwing motorcycle has that.

So, yes, power steering DOES fluctuate in assisting power.
Scott

Yes, you are correct. But, now I'm confused. What does your post have to do with the OP's initial question about excessive no/slow speed steering wheel effort concerning his new F-53 chassis?

Chum lee

Well Chum,
I merely discussed or stated how many of todays power steering systems basically work. Different manufacturers have and install, different input sensors to control just what kind of assistance is needed, at given speeds and rpms. What I said in my previous post may, or may not, give the OP some sort of basis to determine is anything is wrong with his coach, based on how he states it acts at various rpms and speeds.
Scott

[Chum_lee]

FIRE UP wrote:

Terryallan wrote:
Actually it should be easier to turn at slow speed. "most" have "speed sensitive" steering. Means as you go faster, the power assist drops off. This is to make it safer at speed.

Wow,
It took how many answers for an accurate one to appear!!!!!! Yes, power steering in many, many vehicles, boats and more, ARE VARIABLE! The power steering systems in use for years now have multiple inputs for finite adjustments at given speeds and engine rpms. Some are called "Speed sensitive Steering" and other manufacturers call their steering systems other names. Steering parking lots is much more assisted than at any speed higher.

And, just because you're in a turn, on county road or, freeway or any other predicament where a turn of the steering wheel is needed, don't think you're gonna get "parking lot" assist, ain't gonna happen. The vehicles speed sensor(s) are putting in input to the BCM or, body control module as some mfgs call it, Jeep calls it the TIPM, or, Totally Integrated Power Module.

All those things do is, monitor all the driving situations, component operations and vehicle input and, them assist the driver in what they may need and or request, in given situations. Another prime example is "SCV" or, Speed Controlled Volume in many of todays (and for years actually) vehicles radios. The higher the speed the vehicle is driving, the more outside influence on the quietness of the inside of the vehicle. So, the sensors sense all this stuff and, as a result, TURN THE RADIO UP. And, as the vehicle slows down, so the radio volume decreases too. Heck, even my Honda GL 1800 Goldwing motorcycle has that.

So, yes, power steering DOES fluctuate in assisting power.
Scott

Yes, you are correct. But, now I'm confused. What does your post have to do with the OP's initial question about excessive no/slow speed steering wheel effort concerning his new F-53 chassis?

Chum lee

[FIRE_UP]

Terryallan wrote:
Actually it should be easier to turn at slow speed. "most" have "speed sensitive" steering. Means as you go faster, the power assist drops off. This is to make it safer at speed.

Wow,
It took how many answers for an accurate one to appear!!!!!! Yes, power steering in many, many vehicles, boats and more, ARE VARIABLE! The power steering systems in use for years now have multiple inputs for finite adjustments at given speeds and engine rpms. Some are called "Speed sensitive Steering" and other manufacturers call their steering systems other names. Steering parking lots is much more assisted than at any speed higher.

And, just because you're in a turn, on county road or, freeway or any other predicament where a turn of the steering wheel is needed, don't think you're gonna get "parking lot" assist, ain't gonna happen. The vehicles speed sensor(s) are putting in input to the BCM or, body control module as some mfgs call it, Jeep calls it the TIPM, or, Totally Integrated Power Module.

All those things do is, monitor all the driving situations, component operations and vehicle input and, them assist the driver in what they may need and or request, in given situations. Another prime example is "SCV" or, Speed Controlled Volume in many of todays (and for years actually) vehicles radios. The higher the speed the vehicle is driving, the more outside influence on the quietness of the inside of the vehicle. So, the sensors sense all this stuff and, as a result, TURN THE RADIO UP. And, as the vehicle slows down, so the radio volume decreases too. Heck, even my Honda GL 1800 Goldwing motorcycle has that.

So, yes, power steering DOES fluctuate in assisting power.
Scott

[Cloud_Dancer]

A blowout event in a front steer tire will be harder to handle if the power steering is weak at low engine speed. I would be quick to tell this to the Ford rep.

[Terryallan]

Actually it should be easier to turn at slow speed. "most" have "speed sensitive" steering. Means as you go faster, the power assist drops off. This is to make it safer at speed.

[old_guy]

my got a little sluggish and I went into to see my mechanic and he put a small bottle of slick into it and it works fine for the last few years now

[wa8yxm]

Tyler0215 wrote:
Low fluid, loose belt, low tire pressure,front end needs grease. A trip to a shop would be my next trip suggestion.

THough I will second this SOME loss of PS assist is normal at full idle. after all the pump is engine driven, But it should not be enough for you to notice. You can drop into neutral and high-idle if you must then return to LOW/Drive (Auto-Low) but you should not notice it.

Of course on my car there is one belt that runs the A/C and PS pumps nothign else.. Guess which idler sized and threw the belt fast as we could re-install it. YUP. that one

[Chum_lee]

"Is this normal? I have never experienced this in any other vehicle."

No! That is NOT normal. I would not touch it other than to take it to an authorized Ford truck dealer and explain your issue ASAP. It sounds like a pressure control problem which isn't anything you can (or should have to) resolve yourself. It could be as simple as a loose belt, but IMO you would have other issues also if that was the case. Since you are under warranty, let it be Fords problem.

Chum lee

[DrewE]

Definitely get it checked out. Since the braking system is a hydroboost system, this may affect braking somewhat as well (there is a reserve accumulator in the brake system to provide power assist for a couple of stops should the power steering pump fail).

[Matt_Colie]

RR,

There is supposed to be a system in the power steering pump that makes it behave pretty much the same throughout the engine's operating band. I suspect that it is non-functional. Start by telling the service person that the power steering is not working well when the engine is at parking lot speed. That will get them pointed in the right direction.

If he says "They all do that." Then get a factory representative to try it out.

Matt

[enblethen]

I would call a Ford truck dealer shop. This could be a serious issue.
Another thought, air in the system. Could try to look up how to purge steering system. On some systems, you need to remove weight from the front end, turn steering wheel all the way to one direction and hold. Then turn the wheel all the way the other dierction and hold.
Bleeding
Verify that you have or have not electric steering!

[RRTom]

enblethen wrote:
This on 2019?
Could be alignment.

New motorhome. Had it weighed, tire pressure adjusted to the weight and an alignment done within the last month. I know it's the power steering because at idle, sitting still, it is difficult to turn the steering wheel. As soon as I increase the RPMs, it is much easier to turn the steering wheel.

[enblethen]

This on 2019?
Could be alignment.