Re: [ihc] Brake Questions-Scout Diesel Hybrid

["T.R.E.Jr." <T_R_E_Jr@xxxxxxxxxxx>]

---There is a pressure relief button on the front of the proportioning valve
that needs to be depressed with your thumb (not* a mechanical device, doing
so will damage it) while you bleed the front brakes. Remove the brake
warning switch from the top center of the proportioning valve and bleed the
brakes using the relief button. Takes one more person to help bleed the
brakes, but it will allow full travel of the fluid in the calipers before
the front is shut off by the proportioning valve thinking the system has a
leak.

---Thank you,
-T.R.E.Jr.
-`73 Scout II (StoneThrower)
-`51 Farmall H (Heinz)
-`49 IH fridge (presently unnamed and in need of a compressor)
-`49 Plymouth Special Deluxe 4-door Sedan (Papapalooza)

----- Original Message ----- 
From: "Joseph Shaw, II" <josephshaw@domain.elided>
To: <ihc@domain.elided>; <oldihc@domain.elided>
Sent: Sunday, November 23, 2003 12:42 PM
Subject: [ihc] Brake Questions-Scout Diesel Hybrid


> Okay, I am trying to begin the tracking down of a braking problem on my
> new-to-me '145 Scout (I call it a '145 because it is a '68 body mounted on
a
> '77 frame and running gear, thus, '68+'77='145).
>
> So, details are such:
>
> '77 Nissan Diesel Engine, 727 Auto tranny, no power brakes, 4WD, front
disc
> brakes.
>
> It has some unknown brake problem, and I am trying to figure out where to
> begin.
>
> Prior owner was a pretty knowledgeable tinkerer, so he did a lot of things
to
> it when the brakes went bad, but could never quite get them working.  So,
here
> are some questions in general about a '77 diesel's braking system:
>
> Did the '77's all have power brakes originally?  I am only asking because
I
> don't think any of the Scout II's I have dealt with still had manual
brakes,
> and I have had about 5 or 6, so thought maybe they all had power brakes
after
> a certain time.  This one does not, so I am trying to figure out which
braking
> system I am dealing with.  Of course, with the discs on the front, I know
that
> came from the '77, but was not sure if the lack of power brakes might
indicate
> that the MC is from the '68 or something.
>
> Do non-power brakes still use a proportioning valve?
>
> Does the size of the steel tubing used as brake line have an effect-or is
it
> simply the case that when there is no air in the system, the MC will
displace
> the same amount of fluid regardless?
>
> Some of the bends in the newer line look a bit too "sharp" and could be
> cutting off some of the flow of brake fluid-does this sound like a viable
> reason the brakes may not be working?  I am thinking that if they are bent
> enough to be "kinked," it may be impeding flow to the calipers, and thus,
not
> enough displacement is occuring to cause the braking.
>
> Any other suggestions?  I am trying not to overlook things, but as I said,
the
> prior owner knew what he was doing, so I also am trying not to think it is
> something TOO easy that I will figure out right away!
>
> Thanks for any advice!
>
> Michael