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Frustrating Weekend

KH
Ken Henderson
Sat, May 22, 2021 12:41 PM

Last weekend was supposed to be our "Pandemic Coming-Out" -- our first GMC
excursion since Oct. 2019.  A Sunshine Statesmen+Dixielanders rally at
Jekyll Island, GA, postponed last year, promised to be a great chance to
see a few old GMC friends.

We left before 9AM on Thursday and had an uneventful 32 mile ride to
Cordele, GA, where I had to TRY to use the brakes for the first time.  In
the abandoned parking lot where I had to pull off, I finally found the
problem:  I have a diamond-plate aluminum scoop under the front bumper with
an expanded AL  grille in its front.  Behind that, in front of the
radiator, is a long power steering fluid cooler, which I installed with the
Hydroboost.  The inlet hose to that cooler had come off.  It probably took
me an hour to cut the AL grille and bend it back so I could reattach the
hose.

Driving circles in the parking lot to bleed the PS pump, which I'd refilled
from the adjacent Walmart, I found that the brakes and steering worked, but
every call for boost resulted in a scream from the pump.  We decided
to return home and replace the pump with one I rebuilt several years ago.
The drive home was uneventful except for the screams.

At home, I spent the rest of Thursday and an hour Friday replacing the
pump.  BUT, when I powered it up for the first time, that "repaired" hose
blew off again and dumped PS fluid everywhere.  So, I visited every (4)
parts store in town to find replacement hose.  Finally, about 10 AM, we
began our dream trip again.

About 30 miles toward Cordele, I again lost brake and steeing boost.  Sure
'nuff, that hose blew off again.  So, we returned home again, for good,
aborting the trip.

Over the weekend, I located and repaired the problem.  The short version of
the story is that between the cooler and the PS reservoir, I'd installed a
filter.  I've no idea who recommended it, nor where I got it, but it's a
high quality aluminum cylinder with a big circlip to allow diassembly for
cleaning.  I'd never cleaned it and was shocked to find only a tiny (3/8"
dia.) SS screen for media!  It was completely clogged with a little
accumulation of tiny debris.  The photos here show the device, the screen,
its contents, and the much larger AZ replacement suggested by Bob Stone:
https://photos.app.goo.gl/sFEBxEFwdjqLApMK6

IF you have a filter, be sure to keep it clean.  Like any dynamic hydraulic
system, a blockage even in the low pressure downstream section (should be
<100 psi here) will cause the maximum system pressure to reach that
blockage (about 1300 psi here).  Results like mine can be expected.  The
GMC can be driven easily straight ahead without boost, but the brakes are
about 20% as effective.

Maybe next time we'll make it there!

Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, Troy-Bilt APU, etc., etc., etc.
www.gmcwipersetc.com

Last weekend was supposed to be our "Pandemic Coming-Out" -- our first GMC excursion since Oct. 2019. A Sunshine Statesmen+Dixielanders rally at Jekyll Island, GA, postponed last year, promised to be a great chance to see a few old GMC friends. We left before 9AM on Thursday and had an uneventful 32 mile ride to Cordele, GA, where I had to TRY to use the brakes for the first time. In the abandoned parking lot where I had to pull off, I finally found the problem: I have a diamond-plate aluminum scoop under the front bumper with an expanded AL grille in its front. Behind that, in front of the radiator, is a long power steering fluid cooler, which I installed with the Hydroboost. The inlet hose to that cooler had come off. It probably took me an hour to cut the AL grille and bend it back so I could reattach the hose. Driving circles in the parking lot to bleed the PS pump, which I'd refilled from the adjacent Walmart, I found that the brakes and steering worked, but every call for boost resulted in a scream from the pump. We decided to return home and replace the pump with one I rebuilt several years ago. The drive home was uneventful except for the screams. At home, I spent the rest of Thursday and an hour Friday replacing the pump. BUT, when I powered it up for the first time, that "repaired" hose blew off again and dumped PS fluid everywhere. So, I visited every (4) parts store in town to find replacement hose. Finally, about 10 AM, we began our dream trip again. About 30 miles toward Cordele, I again lost brake and steeing boost. Sure 'nuff, that hose blew off again. So, we returned home again, for good, aborting the trip. Over the weekend, I located and repaired the problem. The short version of the story is that between the cooler and the PS reservoir, I'd installed a filter. I've no idea who recommended it, nor where I got it, but it's a high quality aluminum cylinder with a big circlip to allow diassembly for cleaning. I'd never cleaned it and was shocked to find only a tiny (3/8" dia.) SS screen for media! It was completely clogged with a little accumulation of tiny debris. The photos here show the device, the screen, its contents, and the much larger AZ replacement suggested by Bob Stone: https://photos.app.goo.gl/sFEBxEFwdjqLApMK6 IF you have a filter, be sure to keep it clean. Like any dynamic hydraulic system, a blockage even in the low pressure downstream section (should be <100 psi here) will cause the maximum system pressure to reach that blockage (about 1300 psi here). Results like mine can be expected. The GMC can be driven easily straight ahead without boost, but the brakes are about 20% as effective. Maybe next time we'll make it there! Ken H. Americus, GA '76 X-Birchaven w/Cad500/Howell EFI & EBL, Manny Brakes & 1-Ton, Troy-Bilt APU, etc., etc., etc. www.gmcwipersetc.com
L
Larry
Sat, May 22, 2021 1:18 PM

Interesting post Ken. I am interested in your evaluation of the Hydroboost install. Did it give you the extra braking power that you expected? What PS
pump did you use on your Cadillac engine? Other install issues?
Thanks Ken.

Larry
78 Royale w/500 Caddy
Menomonie, WI.

Interesting post Ken. I am interested in your evaluation of the Hydroboost install. Did it give you the extra braking power that you expected? What PS pump did you use on your Cadillac engine? Other install issues? Thanks Ken. -- Larry 78 Royale w/500 Caddy Menomonie, WI.
MC
Matt Colie
Sat, May 22, 2021 2:58 PM

Ken,

It is unfortunate that you did not get to your intended destination, but sometimes that is for the best.

At least you are at home and safe and have identified the issue.  I will take that over trouble on the road any day.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

Ken, It is unfortunate that you did not get to your intended destination, but sometimes that is for the best. At least you are at home and safe and have identified the issue. I will take that over trouble on the road any day. Matt -- Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms SE Michigan - Near DTW - Twixt A2 and Detroit
KH
Ken Henderson
Sat, May 22, 2021 3:53 PM

Larry,

I've never been able to get the 2200+psi brake line pressures some enjoy,
but then I didn't do all the changes Bob Stone recommends either.  I merely
installed the Hydroboost with the OEM PS pump and I don't even remember
which MC.  The front brakes are those that come with Manny's 1-Ton and the
rears those he provides with the Reaction Arms -- but without the parking
function.  I've got to find out what all those calipers are for a system
capacities article we're working on.  I have a dash gauge for front brake
line pressures (using a 1500 psi sender a the MC).  It shows that for an
average stop, I apply 3-400 psi.  For a hard stop I may reach 800 psi; a
panic stop, nearly all I can apply with both feet, reaches about 1300 psi
-- and will slide a rear tire on asphalt.

I just did a test drive of the repaired system.  That filter has been
stiffening up my power steering for a long time.  The coach steers much
easier now.  The pump has a slight whine after its 30 mile dry run, but
seems OK otherwise.  The brakes work just as before (they're not plumbed
through the cooler or the filter).  I may still have a small leak
somewhere, or may have redistributed un-reachable PS fluid -- I'll try to
find out later -- it's noon and I'm about "done" for today.  :-)

Give Lucy a hug from me!

Ken H.

On Sat, May 22, 2021 at 9:18 AM Larry weidnerl@wwt.net wrote:

Interesting post Ken. I am interested in your evaluation of the Hydroboost
install. Did it give you the extra braking power that you expected? What PS
pump did you use on your Cadillac engine? Other install issues?
Thanks Ken.

Larry
78 Royale w/500 Caddy
Menomonie, WI.


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Larry, I've never been able to get the 2200+psi brake line pressures some enjoy, but then I didn't do all the changes Bob Stone recommends either. I merely installed the Hydroboost with the OEM PS pump and I don't even remember which MC. The front brakes are those that come with Manny's 1-Ton and the rears those he provides with the Reaction Arms -- but without the parking function. I've got to find out what all those calipers are for a system capacities article we're working on. I have a dash gauge for front brake line pressures (using a 1500 psi sender a the MC). It shows that for an average stop, I apply 3-400 psi. For a hard stop I may reach 800 psi; a panic stop, nearly all I can apply with both feet, reaches about 1300 psi -- and will slide a rear tire on asphalt. I just did a test drive of the repaired system. That filter has been stiffening up my power steering for a long time. The coach steers much easier now. The pump has a slight whine after its 30 mile dry run, but seems OK otherwise. The brakes work just as before (they're not plumbed through the cooler or the filter). I may still have a small leak somewhere, or may have redistributed un-reachable PS fluid -- I'll try to find out later -- it's noon and I'm about "done" for today. :-) Give Lucy a hug from me! Ken H. On Sat, May 22, 2021 at 9:18 AM Larry <weidnerl@wwt.net> wrote: > Interesting post Ken. I am interested in your evaluation of the Hydroboost > install. Did it give you the extra braking power that you expected? What PS > pump did you use on your Cadillac engine? Other install issues? > Thanks Ken. > -- > Larry > 78 Royale w/500 Caddy > Menomonie, WI. > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options: >
TS
Todd Sullivan
Sat, May 22, 2021 7:52 PM

OG GM power steering pumps like ours don’t seem to mind being run dry.
Unlike many newer
European ones which will burn up immediately once they lose fluid.

Sully
Bellevue wa.
On Sat, May 22, 2021 at 8:54 AM Ken Henderson hend4800@bellsouth.net
wrote:

Larry,

I've never been able to get the 2200+psi brake line pressures some enjoy,
but then I didn't do all the changes Bob Stone recommends either.  I merely
installed the Hydroboost with the OEM PS pump and I don't even remember
which MC.  The front brakes are those that come with Manny's 1-Ton and the
rears those he provides with the Reaction Arms -- but without the parking
function.  I've got to find out what all those calipers are for a system
capacities article we're working on.  I have a dash gauge for front brake
line pressures (using a 1500 psi sender a the MC).  It shows that for an
average stop, I apply 3-400 psi.  For a hard stop I may reach 800 psi; a
panic stop, nearly all I can apply with both feet, reaches about 1300 psi
-- and will slide a rear tire on asphalt.

I just did a test drive of the repaired system.  That filter has been
stiffening up my power steering for a long time.  The coach steers much
easier now.  The pump has a slight whine after its 30 mile dry run, but
seems OK otherwise.  The brakes work just as before (they're not plumbed
through the cooler or the filter).  I may still have a small leak
somewhere, or may have redistributed un-reachable PS fluid -- I'll try to
find out later -- it's noon and I'm about "done" for today.  :-)

Give Lucy a hug from me!

Ken H.

On Sat, May 22, 2021 at 9:18 AM Larry weidnerl@wwt.net wrote:

Interesting post Ken. I am interested in your evaluation of the

Hydroboost

install. Did it give you the extra braking power that you expected? What

PS

pump did you use on your Cadillac engine? Other install issues?
Thanks Ken.

Larry
78 Royale w/500 Caddy
Menomonie, WI.


GMCnet mailing list
Unsubscribe or Change List Options:


GMCnet mailing list
Unsubscribe or Change List Options:

OG GM power steering pumps like ours don’t seem to mind being run dry. Unlike many newer European ones which will burn up immediately once they lose fluid. Sully Bellevue wa. On Sat, May 22, 2021 at 8:54 AM Ken Henderson <hend4800@bellsouth.net> wrote: > Larry, > > I've never been able to get the 2200+psi brake line pressures some enjoy, > but then I didn't do all the changes Bob Stone recommends either. I merely > installed the Hydroboost with the OEM PS pump and I don't even remember > which MC. The front brakes are those that come with Manny's 1-Ton and the > rears those he provides with the Reaction Arms -- but without the parking > function. I've got to find out what all those calipers are for a system > capacities article we're working on. I have a dash gauge for front brake > line pressures (using a 1500 psi sender a the MC). It shows that for an > average stop, I apply 3-400 psi. For a hard stop I may reach 800 psi; a > panic stop, nearly all I can apply with both feet, reaches about 1300 psi > -- and will slide a rear tire on asphalt. > > I just did a test drive of the repaired system. That filter has been > stiffening up my power steering for a long time. The coach steers much > easier now. The pump has a slight whine after its 30 mile dry run, but > seems OK otherwise. The brakes work just as before (they're not plumbed > through the cooler or the filter). I may still have a small leak > somewhere, or may have redistributed un-reachable PS fluid -- I'll try to > find out later -- it's noon and I'm about "done" for today. :-) > > Give Lucy a hug from me! > > Ken H. > > > On Sat, May 22, 2021 at 9:18 AM Larry <weidnerl@wwt.net> wrote: > > > Interesting post Ken. I am interested in your evaluation of the > Hydroboost > > install. Did it give you the extra braking power that you expected? What > PS > > pump did you use on your Cadillac engine? Other install issues? > > Thanks Ken. > > -- > > Larry > > 78 Royale w/500 Caddy > > Menomonie, WI. > > _______________________________________________ > > GMCnet mailing list > > Unsubscribe or Change List Options: > > > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options: >
KH
Ken Henderson
Sat, May 22, 2021 8:14 PM

Yeah, I've run them dry before without trouble.  Their construction, with
just a rotor containing centrifugally-extended SS "blades" as the
functional components means that if there's a little residual lubricant
available, they should do OK.  I'm not sure where the whine comes from, but
a lot of them do it even if never abused.

Ken H.

On Sat, May 22, 2021 at 3:52 PM Todd Sullivan sgltrac@gmail.com wrote:

OG GM power steering pumps like ours don’t seem to mind being run dry.
Unlike many newer
European ones which will burn up immediately once they lose fluid.

Sully
Bellevue wa.
On Sat, May 22, 2021 at 8:54 AM Ken Henderson hend4800@bellsouth.net
wrote:

Larry,

I've never been able to get the 2200+psi brake line pressures some enjoy,
but then I didn't do all the changes Bob Stone recommends either.  I

merely

installed the Hydroboost with the OEM PS pump and I don't even remember
which MC.  The front brakes are those that come with Manny's 1-Ton and

the

rears those he provides with the Reaction Arms -- but without the parking
function.  I've got to find out what all those calipers are for a system
capacities article we're working on.  I have a dash gauge for front brake
line pressures (using a 1500 psi sender a the MC).  It shows that for an
average stop, I apply 3-400 psi.  For a hard stop I may reach 800 psi; a
panic stop, nearly all I can apply with both feet, reaches about 1300 psi
-- and will slide a rear tire on asphalt.

I just did a test drive of the repaired system.  That filter has been
stiffening up my power steering for a long time.  The coach steers much
easier now.  The pump has a slight whine after its 30 mile dry run, but
seems OK otherwise.  The brakes work just as before (they're not plumbed
through the cooler or the filter).  I may still have a small leak
somewhere, or may have redistributed un-reachable PS fluid -- I'll try to
find out later -- it's noon and I'm about "done" for today.  :-)

Give Lucy a hug from me!

Ken H.

On Sat, May 22, 2021 at 9:18 AM Larry weidnerl@wwt.net wrote:

Interesting post Ken. I am interested in your evaluation of the

Hydroboost

install. Did it give you the extra braking power that you expected?

What

PS

pump did you use on your Cadillac engine? Other install issues?
Thanks Ken.

Larry
78 Royale w/500 Caddy
Menomonie, WI.


GMCnet mailing list
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GMCnet mailing list
Unsubscribe or Change List Options:


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Yeah, I've run them dry before without trouble. Their construction, with just a rotor containing centrifugally-extended SS "blades" as the functional components means that if there's a little residual lubricant available, they should do OK. I'm not sure where the whine comes from, but a lot of them do it even if never abused. Ken H. On Sat, May 22, 2021 at 3:52 PM Todd Sullivan <sgltrac@gmail.com> wrote: > OG GM power steering pumps like ours don’t seem to mind being run dry. > Unlike many newer > European ones which will burn up immediately once they lose fluid. > > Sully > Bellevue wa. > On Sat, May 22, 2021 at 8:54 AM Ken Henderson <hend4800@bellsouth.net> > wrote: > > > Larry, > > > > I've never been able to get the 2200+psi brake line pressures some enjoy, > > but then I didn't do all the changes Bob Stone recommends either. I > merely > > installed the Hydroboost with the OEM PS pump and I don't even remember > > which MC. The front brakes are those that come with Manny's 1-Ton and > the > > rears those he provides with the Reaction Arms -- but without the parking > > function. I've got to find out what all those calipers are for a system > > capacities article we're working on. I have a dash gauge for front brake > > line pressures (using a 1500 psi sender a the MC). It shows that for an > > average stop, I apply 3-400 psi. For a hard stop I may reach 800 psi; a > > panic stop, nearly all I can apply with both feet, reaches about 1300 psi > > -- and will slide a rear tire on asphalt. > > > > I just did a test drive of the repaired system. That filter has been > > stiffening up my power steering for a long time. The coach steers much > > easier now. The pump has a slight whine after its 30 mile dry run, but > > seems OK otherwise. The brakes work just as before (they're not plumbed > > through the cooler or the filter). I may still have a small leak > > somewhere, or may have redistributed un-reachable PS fluid -- I'll try to > > find out later -- it's noon and I'm about "done" for today. :-) > > > > Give Lucy a hug from me! > > > > Ken H. > > > > > > On Sat, May 22, 2021 at 9:18 AM Larry <weidnerl@wwt.net> wrote: > > > > > Interesting post Ken. I am interested in your evaluation of the > > Hydroboost > > > install. Did it give you the extra braking power that you expected? > What > > PS > > > pump did you use on your Cadillac engine? Other install issues? > > > Thanks Ken. > > > -- > > > Larry > > > 78 Royale w/500 Caddy > > > Menomonie, WI. > > > _______________________________________________ > > > GMCnet mailing list > > > Unsubscribe or Change List Options: > > > > > _______________________________________________ > > GMCnet mailing list > > Unsubscribe or Change List Options: > > > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options: >
TS
Todd Sullivan
Sat, May 22, 2021 8:32 PM

Probably a little air still suspended in the fluid. I bet after a couple
starts and stops with sitting in between and it goes away.

Sully
Bellevue wa

On Sat, May 22, 2021 at 1:14 PM Ken Henderson hend4800@bellsouth.net
wrote:

Yeah, I've run them dry before without trouble.  Their construction, with
just a rotor containing centrifugally-extended SS "blades" as the
functional components means that if there's a little residual lubricant
available, they should do OK.  I'm not sure where the whine comes from, but
a lot of them do it even if never abused.

Ken H.

On Sat, May 22, 2021 at 3:52 PM Todd Sullivan sgltrac@gmail.com wrote:

OG GM power steering pumps like ours don’t seem to mind being run dry.
Unlike many newer
European ones which will burn up immediately once they lose fluid.

Sully
Bellevue wa.
On Sat, May 22, 2021 at 8:54 AM Ken Henderson hend4800@bellsouth.net
wrote:

Larry,

I've never been able to get the 2200+psi brake line pressures some

enjoy,

but then I didn't do all the changes Bob Stone recommends either.  I

merely

installed the Hydroboost with the OEM PS pump and I don't even remember
which MC.  The front brakes are those that come with Manny's 1-Ton and

the

rears those he provides with the Reaction Arms -- but without the

parking

function.  I've got to find out what all those calipers are for a

system

capacities article we're working on.  I have a dash gauge for front

brake

line pressures (using a 1500 psi sender a the MC).  It shows that for

an

average stop, I apply 3-400 psi.  For a hard stop I may reach 800 psi;

a

panic stop, nearly all I can apply with both feet, reaches about 1300

psi

-- and will slide a rear tire on asphalt.

I just did a test drive of the repaired system.  That filter has been
stiffening up my power steering for a long time.  The coach steers much
easier now.  The pump has a slight whine after its 30 mile dry run, but
seems OK otherwise.  The brakes work just as before (they're not

plumbed

through the cooler or the filter).  I may still have a small leak
somewhere, or may have redistributed un-reachable PS fluid -- I'll try

to

find out later -- it's noon and I'm about "done" for today.  :-)

Give Lucy a hug from me!

Ken H.

On Sat, May 22, 2021 at 9:18 AM Larry weidnerl@wwt.net wrote:

Interesting post Ken. I am interested in your evaluation of the

Hydroboost

install. Did it give you the extra braking power that you expected?

What

PS

pump did you use on your Cadillac engine? Other install issues?
Thanks Ken.

Larry
78 Royale w/500 Caddy
Menomonie, WI.


GMCnet mailing list
Unsubscribe or Change List Options:


GMCnet mailing list
Unsubscribe or Change List Options:


GMCnet mailing list
Unsubscribe or Change List Options:


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Unsubscribe or Change List Options:

Probably a little air still suspended in the fluid. I bet after a couple starts and stops with sitting in between and it goes away. Sully Bellevue wa On Sat, May 22, 2021 at 1:14 PM Ken Henderson <hend4800@bellsouth.net> wrote: > Yeah, I've run them dry before without trouble. Their construction, with > just a rotor containing centrifugally-extended SS "blades" as the > functional components means that if there's a little residual lubricant > available, they should do OK. I'm not sure where the whine comes from, but > a lot of them do it even if never abused. > > Ken H. > > > On Sat, May 22, 2021 at 3:52 PM Todd Sullivan <sgltrac@gmail.com> wrote: > > > OG GM power steering pumps like ours don’t seem to mind being run dry. > > Unlike many newer > > European ones which will burn up immediately once they lose fluid. > > > > Sully > > Bellevue wa. > > On Sat, May 22, 2021 at 8:54 AM Ken Henderson <hend4800@bellsouth.net> > > wrote: > > > > > Larry, > > > > > > I've never been able to get the 2200+psi brake line pressures some > enjoy, > > > but then I didn't do all the changes Bob Stone recommends either. I > > merely > > > installed the Hydroboost with the OEM PS pump and I don't even remember > > > which MC. The front brakes are those that come with Manny's 1-Ton and > > the > > > rears those he provides with the Reaction Arms -- but without the > parking > > > function. I've got to find out what all those calipers are for a > system > > > capacities article we're working on. I have a dash gauge for front > brake > > > line pressures (using a 1500 psi sender a the MC). It shows that for > an > > > average stop, I apply 3-400 psi. For a hard stop I may reach 800 psi; > a > > > panic stop, nearly all I can apply with both feet, reaches about 1300 > psi > > > -- and will slide a rear tire on asphalt. > > > > > > I just did a test drive of the repaired system. That filter has been > > > stiffening up my power steering for a long time. The coach steers much > > > easier now. The pump has a slight whine after its 30 mile dry run, but > > > seems OK otherwise. The brakes work just as before (they're not > plumbed > > > through the cooler or the filter). I may still have a small leak > > > somewhere, or may have redistributed un-reachable PS fluid -- I'll try > to > > > find out later -- it's noon and I'm about "done" for today. :-) > > > > > > Give Lucy a hug from me! > > > > > > Ken H. > > > > > > > > > On Sat, May 22, 2021 at 9:18 AM Larry <weidnerl@wwt.net> wrote: > > > > > > > Interesting post Ken. I am interested in your evaluation of the > > > Hydroboost > > > > install. Did it give you the extra braking power that you expected? > > What > > > PS > > > > pump did you use on your Cadillac engine? Other install issues? > > > > Thanks Ken. > > > > -- > > > > Larry > > > > 78 Royale w/500 Caddy > > > > Menomonie, WI. > > > > _______________________________________________ > > > > GMCnet mailing list > > > > Unsubscribe or Change List Options: > > > > > > > _______________________________________________ > > > GMCnet mailing list > > > Unsubscribe or Change List Options: > > > > > _______________________________________________ > > GMCnet mailing list > > Unsubscribe or Change List Options: > > > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options: >
KH
Ken Henderson
Sat, May 22, 2021 8:45 PM

I hope -- but with my single-ear hearing, it don't much matter!  :-)

Ken H.

On Sat, May 22, 2021 at 4:33 PM Todd Sullivan sgltrac@gmail.com wrote:

Probably a little air still suspended in the fluid. I bet after a couple
starts and stops with sitting in between and it goes away.

Sully
Bellevue wa

On Sat, May 22, 2021 at 1:14 PM Ken Henderson hend4800@bellsouth.net
wrote:

Yeah, I've run them dry before without trouble.  Their construction, with
just a rotor containing centrifugally-extended SS "blades" as the
functional components means that if there's a little residual lubricant
available, they should do OK.  I'm not sure where the whine comes from,

but

a lot of them do it even if never abused.

Ken H.

On Sat, May 22, 2021 at 3:52 PM Todd Sullivan sgltrac@gmail.com wrote:

OG GM power steering pumps like ours don’t seem to mind being run dry.
Unlike many newer
European ones which will burn up immediately once they lose fluid.

Sully
Bellevue wa.
On Sat, May 22, 2021 at 8:54 AM Ken Henderson hend4800@bellsouth.net
wrote:

Larry,

I've never been able to get the 2200+psi brake line pressures some

enjoy,

but then I didn't do all the changes Bob Stone recommends either.  I

merely

installed the Hydroboost with the OEM PS pump and I don't even

remember

which MC.  The front brakes are those that come with Manny's 1-Ton

and

the

rears those he provides with the Reaction Arms -- but without the

parking

function.  I've got to find out what all those calipers are for a

system

capacities article we're working on.  I have a dash gauge for front

brake

line pressures (using a 1500 psi sender a the MC).  It shows that for

an

average stop, I apply 3-400 psi.  For a hard stop I may reach 800

psi;

a

panic stop, nearly all I can apply with both feet, reaches about 1300

psi

-- and will slide a rear tire on asphalt.

I just did a test drive of the repaired system.  That filter has been
stiffening up my power steering for a long time.  The coach steers

much

easier now.  The pump has a slight whine after its 30 mile dry run,

but

seems OK otherwise.  The brakes work just as before (they're not

plumbed

through the cooler or the filter).  I may still have a small leak
somewhere, or may have redistributed un-reachable PS fluid -- I'll

try

to

find out later -- it's noon and I'm about "done" for today.  :-)

Give Lucy a hug from me!

Ken H.

On Sat, May 22, 2021 at 9:18 AM Larry weidnerl@wwt.net wrote:

Interesting post Ken. I am interested in your evaluation of the

Hydroboost

install. Did it give you the extra braking power that you expected?

What

PS

pump did you use on your Cadillac engine? Other install issues?
Thanks Ken.

Larry
78 Royale w/500 Caddy
Menomonie, WI.


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I hope -- but with my single-ear hearing, it don't much matter! :-) Ken H. On Sat, May 22, 2021 at 4:33 PM Todd Sullivan <sgltrac@gmail.com> wrote: > Probably a little air still suspended in the fluid. I bet after a couple > starts and stops with sitting in between and it goes away. > > Sully > Bellevue wa > > On Sat, May 22, 2021 at 1:14 PM Ken Henderson <hend4800@bellsouth.net> > wrote: > > > Yeah, I've run them dry before without trouble. Their construction, with > > just a rotor containing centrifugally-extended SS "blades" as the > > functional components means that if there's a little residual lubricant > > available, they should do OK. I'm not sure where the whine comes from, > but > > a lot of them do it even if never abused. > > > > Ken H. > > > > > > On Sat, May 22, 2021 at 3:52 PM Todd Sullivan <sgltrac@gmail.com> wrote: > > > > > OG GM power steering pumps like ours don’t seem to mind being run dry. > > > Unlike many newer > > > European ones which will burn up immediately once they lose fluid. > > > > > > Sully > > > Bellevue wa. > > > On Sat, May 22, 2021 at 8:54 AM Ken Henderson <hend4800@bellsouth.net> > > > wrote: > > > > > > > Larry, > > > > > > > > I've never been able to get the 2200+psi brake line pressures some > > enjoy, > > > > but then I didn't do all the changes Bob Stone recommends either. I > > > merely > > > > installed the Hydroboost with the OEM PS pump and I don't even > remember > > > > which MC. The front brakes are those that come with Manny's 1-Ton > and > > > the > > > > rears those he provides with the Reaction Arms -- but without the > > parking > > > > function. I've got to find out what all those calipers are for a > > system > > > > capacities article we're working on. I have a dash gauge for front > > brake > > > > line pressures (using a 1500 psi sender a the MC). It shows that for > > an > > > > average stop, I apply 3-400 psi. For a hard stop I may reach 800 > psi; > > a > > > > panic stop, nearly all I can apply with both feet, reaches about 1300 > > psi > > > > -- and will slide a rear tire on asphalt. > > > > > > > > I just did a test drive of the repaired system. That filter has been > > > > stiffening up my power steering for a long time. The coach steers > much > > > > easier now. The pump has a slight whine after its 30 mile dry run, > but > > > > seems OK otherwise. The brakes work just as before (they're not > > plumbed > > > > through the cooler or the filter). I may still have a small leak > > > > somewhere, or may have redistributed un-reachable PS fluid -- I'll > try > > to > > > > find out later -- it's noon and I'm about "done" for today. :-) > > > > > > > > Give Lucy a hug from me! > > > > > > > > Ken H. > > > > > > > > > > > > On Sat, May 22, 2021 at 9:18 AM Larry <weidnerl@wwt.net> wrote: > > > > > > > > > Interesting post Ken. I am interested in your evaluation of the > > > > Hydroboost > > > > > install. Did it give you the extra braking power that you expected? > > > What > > > > PS > > > > > pump did you use on your Cadillac engine? Other install issues? > > > > > Thanks Ken. > > > > > -- > > > > > Larry > > > > > 78 Royale w/500 Caddy > > > > > Menomonie, WI. > > > > > _______________________________________________ > > > > > GMCnet mailing list > > > > > Unsubscribe or Change List Options: > > > > > > > > > _______________________________________________ > > > > GMCnet mailing list > > > > Unsubscribe or Change List Options: > > > > > > > _______________________________________________ > > > GMCnet mailing list > > > Unsubscribe or Change List Options: > > > > > _______________________________________________ > > GMCnet mailing list > > Unsubscribe or Change List Options: > > > _______________________________________________ > GMCnet mailing list > Unsubscribe or Change List Options: >
T
tomkatz3@comcast.net
Sat, May 22, 2021 10:33 PM

Ken,

I am very happy to hear you and yours are all OK and the coach is un-harmed. Thank you for the details.

I am involved in installing the Applied Phase II Disc brake system with Dave Lanzi's sensitized booster and the P-80 Master Cylinder. Your information
is helpful.

Do you still recommend the filter?

Tom K.

Tom & Oki Katzenberger,
Kingsville, Maryland,
1977 23' Birchaven, 455 C.I.D.

Ken, I am very happy to hear you and yours are all OK and the coach is un-harmed. Thank you for the details. I am involved in installing the Applied Phase II Disc brake system with Dave Lanzi's sensitized booster and the P-80 Master Cylinder. Your information is helpful. Do you still recommend the filter? Tom K. -- Tom & Oki Katzenberger, Kingsville, Maryland, 1977 23' Birchaven, 455 C.I.D.
DK
Dave King
Sat, May 22, 2021 10:36 PM

En H., what happened toyou with thepower steering filter is what I call the
Law of Unintended Consequences. Some call it Murphys Law. Glad it sort of worked out.
Sounds something like Ken Burton's adventure with the horse trailer tires.
77 degree F in Toronto right now 6:30PM SATURDAY.

DAVE KING
lurker, wannabe
Toronto, Ontario, Canada

En H., what happened toyou with thepower steering filter is what I call the Law of Unintended Consequences. Some call it Murphys Law. Glad it sort of worked out. Sounds something like Ken Burton's adventure with the horse trailer tires. 77 degree F in Toronto right now 6:30PM SATURDAY. -- DAVE KING lurker, wannabe Toronto, Ontario, Canada