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Since: May 07, 2004 Posts: 506
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(Msg. 1) Posted: Wed Jul 21, 2004 3:53 am
Post subject: Good Studebaker day. Archived from groups: alt>autos>studebaker (more info?)
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Got the insurance and "antique" licence plate for the GT Hawk
organized on Monday.
Tuesday, I did a little yard work, and then some work on the GT. Had
to move the great hunk of iron off the backside of the forklift I'm
parting out, so I hitched a chain to it and dragged it to a remote
corner of the yard with the US6. The truck scarcely felt the load.
Then I mowed the the patch of yard that the US6 gets parked in, and
did the slope break along the ditch as well. Every litle bit of mowing
helps.
Then I got into the GT. Took the driver's door apart to find out why
the window wouldn't go down. That was easy; the forward pin on the
regulator that fits into the slot on the window frame had popped out,
and the arm of the regulator had become bent due to all the load being
on the rear pin. I removed the regulator, washed it, straightened the
bent arm, and lubed it up and reinstalled it. Also removed, washed and
lubed the rear track for the window guide shoe. Used spray-on dry moly
lube for that, wheel bearing grease on the regulator. It had been
previously lubed with white grease that dried to a hard crust. Not
good, IMHO. Window works very easily now. I also was able to get it
setting a bit more level; not perfect, but close. Incidentally, the
inside of the door is as nice as the day it was made, with no rust at
all to be seen. I LIKE that.
Got under the front end, and found both front brakes had tightened up
again. Slacked off the adjusters once more. While I had it jacked up,
I popped one of those little threaded spring wedges in between the
coils of the left front spring, which was sagging a bit. Made an
improvement. Not the best solution, though.
Drove the GT to Calgary to attend the Foothills SDC picnic at Carburn
Park. We had Dave Hart's '51 Champion sedan, Neil Crichton's '63 GT,
Jack Gregory's newly-restored '61 Lark VI deluxe (very nice car),
Tracy Ronak's nifty modified '50 C-cab, and my GT.
The car ran well there and back, although I felt that the brakes were
beginning to drag again. Acts like the self-adjusters are
over-adjusting. I DON'T think it's a problem with a bad hose retaining
hydraulic pressure in the front brakes, although I will concede that
it remains a possibility. If it were that, though, you would think
with all the adjuster slacking-off I've done, that the pedal would be
very low after the trapped pressure finally did bleed off. And it's
not.
I think I'll pull the front drums and have a good look in a good
light.
Gord Richmond >> Stay informed about: Good Studebaker day. |
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Since: May 12, 2004 Posts: 150
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(Msg. 2) Posted: Wed Jul 21, 2004 11:54 am
Post subject: Re: Good Studebaker day. [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
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Gord,
Your brake "problem" doesn't sound like a matter of adjustment. It can be several things- but I'd
check these first:
1) Residual pressure relief hole plugged/partially plugged inside the master cylinder. Remove cap-
look inside the master cylinder- and you will see 2 holes in the bottom. The larger (front) hole-
provides fuid to the piston. The smaller (rear) hole- bleeds off the residual pressure back into the
MC after you take your foot off the brakes. IF this hole is plugged- the pressure builds up in the
lines, and causes the shoes to drag. THIS IS VERY COMMON.
2) Your rubber lines to the front brakes- are beginning to deteriorate internally. This swelling
will often result in the brakes dragging- because the hoses don't allow the pressure to bleed off.
Replace the front hoses.
3) Pinched/crushed hard line between the brass junction block and the front hoses. Inspect the hard
lines between the brass junction block- and the front rubber hoses. One may be kinked or crunched
from road debris. This will also restrict the residual pressure from bleeding off.
*** For those of you that have front disk brakes- Often, those that don't know- will replace the
master cylinder with a cylinder for a NON-DB car. This will cause the front pads to constantly drag.
The DB master cylinder- does not have a residual check valve on the spring inside the master
cylinder. You can get a NON-DB cylinder- and defeat the check valve in several ways. Poke holes in
the rubber baffle OR melt the rubber with a little heat from a propane torch.
Ray
Gordon Richmond wrote:
> Got the insurance and "antique" licence plate for the GT Hawk
> organized on Monday.
>
> Tuesday, I did a little yard work, and then some work on the GT. Had
> to move the great hunk of iron off the backside of the forklift I'm
> parting out, so I hitched a chain to it and dragged it to a remote
> corner of the yard with the US6. The truck scarcely felt the load.
> Then I mowed the the patch of yard that the US6 gets parked in, and
> did the slope break along the ditch as well. Every litle bit of mowing
> helps.
>
> Then I got into the GT. Took the driver's door apart to find out why
> the window wouldn't go down. That was easy; the forward pin on the
> regulator that fits into the slot on the window frame had popped out,
> and the arm of the regulator had become bent due to all the load being
> on the rear pin. I removed the regulator, washed it, straightened the
> bent arm, and lubed it up and reinstalled it. Also removed, washed and
> lubed the rear track for the window guide shoe. Used spray-on dry moly
> lube for that, wheel bearing grease on the regulator. It had been
> previously lubed with white grease that dried to a hard crust. Not
> good, IMHO. Window works very easily now. I also was able to get it
> setting a bit more level; not perfect, but close. Incidentally, the
> inside of the door is as nice as the day it was made, with no rust at
> all to be seen. I LIKE that.
>
> Got under the front end, and found both front brakes had tightened up
> again. Slacked off the adjusters once more. While I had it jacked up,
> I popped one of those little threaded spring wedges in between the
> coils of the left front spring, which was sagging a bit. Made an
> improvement. Not the best solution, though.
>
> Drove the GT to Calgary to attend the Foothills SDC picnic at Carburn
> Park. We had Dave Hart's '51 Champion sedan, Neil Crichton's '63 GT,
> Jack Gregory's newly-restored '61 Lark VI deluxe (very nice car),
> Tracy Ronak's nifty modified '50 C-cab, and my GT.
>
> The car ran well there and back, although I felt that the brakes were
> beginning to drag again. Acts like the self-adjusters are
> over-adjusting. I DON'T think it's a problem with a bad hose retaining
> hydraulic pressure in the front brakes, although I will concede that
> it remains a possibility. If it were that, though, you would think
> with all the adjuster slacking-off I've done, that the pedal would be
> very low after the trapped pressure finally did bleed off. And it's
> not.
>
> I think I'll pull the front drums and have a good look in a good
> light.
>
> Gord Richmond >> Stay informed about: Good Studebaker day. |
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Since: May 07, 2004 Posts: 506
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(Msg. 3) Posted: Wed Jul 21, 2004 1:54 pm
Post subject: Re: Good Studebaker day. [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
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Ray,
When the problem first cropped up, on driving the car home, I pulled
off the freeway into a service station lot and checked the brakes.
Opened the bleed screw at the hydrovac, and scarcely a drop of fluid
came out. Opened the bleed screw at the left front wheel, and a little
fluid trickled out, but nowhere near the amount or pressure I would
expect had there been trapped pressure in the flex line. I had my
helper depress the brake pedal while I had the bleed screw open, and a
good jet of fluid shot out. Closed the bleed screw while the pedal was
down.
I made a point of NOT applying the foot brake once, going back out on
the freeway. After 3 or 4 miles, the left front was again dragging big
time. Then I pulled off again, and found the left front dragging
badly. I backed off the adjuster, pulled the drum, and found what
seesm to be all new parts; wheel cylinder, shoes, drum turned with no
ridge, etc. Slacked off the adjuster, and made it all the way home
without incident, and all the way to Calgary last night. Driving
around the city, and using the brakes more as a consequence, it began
to drag again.
There's lots of free play between the M/C push rod and the plunger,
incidentally.
BTW, it's only the front brakes that act up. Perhaps it is one of the
short hoses at the hydrovac?
I think I'll pull the front drums and temporarily remove the auto
adjusters. If the problem persists, it's got to be hydraulics.
Gord Richmond >> Stay informed about: Good Studebaker day. |
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Since: May 07, 2004 Posts: 506
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(Msg. 4) Posted: Mon Jul 26, 2004 11:53 am
Post subject: Re: Good Studebaker day. [Login to view extended thread Info.] Archived from groups: per prev. post (more info?)
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Ray,
I got into the front brakes again yesterday. Jacked the car up, and
found the left front drum almost too tight to turn by hand. Brakes
were cold; I had only moved the car a few yards. I opened the bleed
screw on the left front, and only a few drops of fluid came out, and
the brake did NOT slack off. I backed off the star wheel, and removed
the drum. No sign of the shoes not coming to rest properly on the
anchor pin. It really does seem like it is over-adjusting for some
obscure reason. The self-adjuster unit appears to be assembled
properly. I checked it against another 11" brake unit off my shelf,
and everything appeared kosher, other than the return springs were
hooked on the anchor pin the wrong way, and the tension spring above
the adjuster sleeve was hooked on the outside of the leading shoe
instead of the inside face.
Wheel cylinders and linings are new, BTW, and the linings make good
contact with the drums. New flex hose on the driver side, too.
Anyway, I lubed the pivot points and backing plate tables with a dab
of anti-seize, and reassembled everything. One thing I did notice, is
that the keystone-shaped block on the anchor pin was facing the right
way, but appear quite flat on its forward edge; the same part in my
"shelf" brakes has a rounded leading edge.
I left the brakes adjusted loose and drove to town. After about a
dozen brake applications, the pedal had come up quite a bit. It
remains to be seen if they will continue to overtighten.
Gord Richmond >> Stay informed about: Good Studebaker day. |
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