Power steering pump issue

[RF_Burns]

Just wondering if this issue could be a power steering pump problem (low pressure or low volume)

When I turn the steering wheel I can "feel" the valves in the steering box open, but I need to turn the wheel more before the tires start to move. It
does not matter if I'm stopped or rolling down the road. It kinda feels / acts like the hydro-static steering on my tractor.

Background: Several years ago (maybe 2016), over the winter I rebuilt my leaking power steering pump and got a rebuilt steering box from Dave Lenzi.
That box had issues but in the meantime DaveL got sick so I just put-up with that issue. After DaveL recovered I showed him the issue at a Rally and
he agreed, so last summer I got a replacement steering box from him.

Now that Dave's wife is ill, I don't want to bother him with this, so I'm asking here first.

I'm wondering if there is low PS pump pressure or volume causing this issue. I do have a dual pulley system, so there is not a full wrap of the belt
on the PS pump. I tightened the belts, but it didn't help. So I tried a make-shift strobe flashing on the pulley and it didn't seem like the it is
slipping. I never have any belt squeal, nor any noise from the pump. I can't see any foaming in the fluid so I assume there is no air in the
system.

I have KenH's electric wiper so no issues with the OEM hydraulic wiper causing problems. I also replaced the high and low pressure hoses when I
rebuilt the pump.

The pump rebuild was pretty straight forward, but I could have messed something up. If I need to replace the pump, I think I'll just get a rebuilt
unit rather than a rebuild kit.

What say yea?

--
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

 

[terry1]

I would say it sounds like the problem is in the steering gear.
--
Terry Kelpien

ASE Master Technician

73 Glacier 260

Smithfield, Va.

 

[scott nutter1]

Bruce,
Out of curiosity, did you remove the small o rings where the plastic plugs go on the steering box when you received it from Dave? They are easy to
miss, ask me how I know!! If they are not removed when the steering box is installed, they will plug up the internals and make it hard to turn the
wheels.
By the way, Mary's treatments were successful, and they are back in Michigan!!
Scott
--
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
installed MSD Atomic EFI
Houston, Texas

 

[jim kanomata1]

Scott , that is great news that Mary was able to receive good treatment as
I heard it was very rare and went to few and finally found one.

On Sat, Feb 8, 2020 at 8:20 AM randefused eeScottrearc Nutter via Gmclist <

> Bruce,
> Out of curiosity, did you remove the small o rings where the plastic plugs
> go on the steering box when you received it from Dave? They are easy to
> miss, ask me how I know!! If they are not removed when the steering box
> is installed, they will plug up the internals and make it hard to turn the
> wheels.
> By the way, Mary's treatments were successful, and they are back in
> Michigan!!
> Scott
> --
> Scott Nutter
> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final
> drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
> installed MSD Atomic EFI
> Houston, Texas
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmcrvparts.com
1-800-752-7502

 

[jim kanomata1]

> Scott , that is great news that Mary was able to receive good treatment
> as I heard it was very rare and went to few and finally found one.
>
> On Sat, Feb 8, 2020 at 8:20 AM randefused eeScottrearc Nutter via Gmclist

>
>> Bruce,
>> Out of curiosity, did you remove the small o rings where the plastic
>> plugs go on the steering box when you received it from Dave? They are easy
>> to
>> miss, ask me how I know!! If they are not removed when the steering box
>> is installed, they will plug up the internals and make it hard to turn the
>> wheels.
>> By the way, Mary's treatments were successful, and they are back in
>> Michigan!!
>> Scott
>> --
>> Scott Nutter
>> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21
>> final drive, Quad bags, tankless water heater, everything Lenzi. Alex
>> Ferrera
>> installed MSD Atomic EFI
>> Houston, Texas
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk
> http://www.appliedgmcrvparts.com
> 1-800-752-7502
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmcrvparts.com
1-800-752-7502

 

[RF_Burns]

Scott,
I don't recall seeing any rubber O-rings. DaveL uses the the hose ports to hold an aluminum keeper that holds the input shaft at the center "high
point" with 2 metal bolts.

Dave didn't mention any O-rings to remove that I recall. I'm not sure he would have anything there that is not supposed to be in our application.
--
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

 

[scott nutter1]

Bruce,
I would definitely call Dave. I didn't see my o rings either!! But they are there. They are in the plugs where the power steering lines go to the gear
box. Since I did not see them, or know they were there, I just remover the plastic plugs and installed the P/S hoses(big mistake!!). The o rings
traveled through the steering box and clogged a screen or filter in the box.......I drove a year like that before I finally figured it out.....it
drove terrible, I was on the verge of selling it!! But after talking with Dave, he figured it out for me. Got a new box, and back to steering like
it's suppose to!! I'm so glad I didn't sell the coach!!
Good luck, Scott.
--
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
installed MSD Atomic EFI
Houston, Texas