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Discussion Starter · #1 ·
Hoping for some input on a problem with rear brakes on a troop carrier
[2/91manuf].
Original problem was the escape of the leading shoe on RT/HND Rear set
from the slave , creating a jammed wheel.
On inspection of all parts the system was found to totally inundated
with signs of moisture stress.
A complete clean [blow-job] together with master cylinder and load
sequencing valve replacement delivers this new (?) problem, as put
here
The brake system bleeds normally as in pedal to master cylinder
reaction when releasing and pressurizing the system.. When the system
is closed the brake pedal reacts normally. On starting the engine the
pedal depresses the standard amount. With the vehicle stationary the
pedal travel is acceptable. With the vehicle in motion the pedal
travel extends beyond 50% and only the front discs are activated on
any attempt to brake (measured or emergency). The rear drums appear to
have no pressure whatsoever exerted on them.
I am casting a suspicious eye at the load sequencing valve, primarily
because I do not understand how it works (hydraulic). I am looking for
someone to explain the theoretical design of such a
contraption :)
In the event I have missed something very obvious I would appreciate a
complete jerk back to reality.

thanks.

crusty
 
G

·
Discussion Starter · #2 ·
"crusty4runner" <[email protected]> wrote in message
news:[email protected]
> Hoping for some input on a problem with rear brakes on a troop carrier
> [2/91manuf].
> Original problem was the escape of the leading shoe on RT/HND Rear set
> from the slave , creating a jammed wheel.
> On inspection of all parts the system was found to totally inundated
> with signs of moisture stress.
> A complete clean [blow-job] together with master cylinder and load
> sequencing valve replacement delivers this new (?) problem, as put
> here
> The brake system bleeds normally as in pedal to master cylinder
> reaction when releasing and pressurizing the system.. When the system
> is closed the brake pedal reacts normally. On starting the engine the
> pedal depresses the standard amount. With the vehicle stationary the
> pedal travel is acceptable. With the vehicle in motion the pedal
> travel extends beyond 50% and only the front discs are activated on
> any attempt to brake (measured or emergency). The rear drums appear to
> have no pressure whatsoever exerted on them.
> I am casting a suspicious eye at the load sequencing valve, primarily
> because I do not understand how it works (hydraulic). I am looking for
> someone to explain the theoretical design of such a
> contraption :)
> In the event I have missed something very obvious I would appreciate a
> complete jerk back to reality.
>
> thanks.
>
> crusty


Are you sure you adjusted the rear brakes properly ? How well does the
parking brake work ? Is the parking brake adjusted properly as well ? Sounds
like it may be a combination of the two. First, make sure that the parking
brake is fully releasing, adjust if needed. Next, properly adjust the rear
shoes. To do this adjust the shoes until the wheel locks up, then back off
the adjuster antil you have a slight drag. Last, adjust the parking brake
cable, if needed.
 
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