On Sat, 18 Feb 2017 07:47:32 -0700, Brewster wrote:

On 2/16/17 8:44 PM, wrote:


Impossible to pump it dry because it is a split reservoir too - but if
you blow the front system and the rear is out of adjustment (extremely
common - auto adjusters stuck and rear brakes not serviced - or
handbrake never used - required to operate the adjusters) and there is
not enough volume pumped from the bottomed rear piston to fully apply
the rear brakes. If you don't "brain freeze" and get a second pump in,
you have a chance to slow down, if not totally stop


All the drum brakes I'm familiar with are adjusted by hitting the brakes
while traveling in reverse. Each event indexes the star adjuster by one
notch. Parking brakes, as used with drums, merely mechanically apply
force to a lever on the drum mechanism, no effect on the adjuster.

-BR
That is true on Bendix and Wagner brakes, as well as DElco Moraine but
not many import brakes and a lot of later model Chrysler brakes that
use a "ratchet" instead of a theaded adjuster and star wheel.

see:
http://www.autozone.com/repairguides...96b43f802d6ca5
for one example (Chrysler)

Also, vehicles that have a star wheel adjuster up by the cyl instead
of down at the bottom also adjust by emergency brake application - not
backing up. Homda is an example. These are "fixed anchor" or "dual
servo" brakes.
Toyota works this way too. I was looking for a good picture and found
this one - for a Tundra - showing very clearly it is the hand
brake/parking brake that adjusts the rear drum brakes..

http://www.4x4wire.com/toyota/mainte...es/image30.jpg


and this one shows the old Dodge K car and Omni style.

http://www.ifitjams.com/parking.htm