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Page Title:
HEIGHT SENSING BRAKE PROPORTIONING VALVE REPLACEMENT. |
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 TM5-4210-224-14&P
4-211. HEIGHT SENSING BRAKE PROPORTIONING VALVE REPLACEMENT.
This task covers:
a. Removal
b. Installation
INITIAL SET-UP
Tools
General Safety Instructions
Jack
Engine OFF
Jack Stand
Transmission in (N) neutral
General Mechanics Tool Kit
Parking brake and micro-brakelock set.
Proportioning Valve Adjustment Gauge
Materials/Parts
Brake Fluid (Appendix D, Item 4)
Valve (14036789)
REMOVAL
WARNING
Adding any type of suspension
accessories or making modification
that will change the distance
between the axle and the frame
without changing the load, will
provide a false reading to the
brake proportioning valve which
could provide unsatisfactory brake
performance, resulting in an
accident and possible injury.
a. Raise the vehicle and support the frame with
NOTE
suitable safety stands, allowing the axle to hang
The
height
sensing
brake
free.
proportioning
valve
provides
b. Clean the exterior of the valve connections to
optimum brake balance and
prevent dirt and other foreign materials from
efficiency.
The vehicle braking
contaminating the hydraulic system.
force is distributed to the front and
rear wheels as determined by
c. Disconnect the brake pipes (1), plugging them
either a light or heavy payload
to prevent loss of fluid or entrance of dirt.
condition. The valve is mounted
d. Remove the nut (2) from the shaft and
on the frame and a linkage
disconnect the lever (3).
connects the valve to a bracket
that is mounted on the axle.
e. Disconnect the bolts (4) and washers (5) and
remove the valve (6).
4-291
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