PROPORTIONING VALVE
Do not disassemble the proportioning valve. The proportioning valve regulates the distribution of fluid pressure to the front and rear brakes to prevent skidding in the event of rear wheel lock and to obtain a higher brake efficiency.
PROPORTIONING VALVE FUNCTION TEST
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Connect two pressure gauges, one to the input side and one to the output side of the proportioning valve.
NOTE
Be sure to bleed the system after you connect the pressure gauges.
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With the brakes applied, measure the input pressure and the output pressure. If the measured pressures are within the ranges as illustrated, the proportioning valve is good.
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Reconnect the brake lines in their original positions and bleed the system.
NOTE
This figure shows characteristics of the proportioning valve during pressure increase.
A
|
51 ± 3.5
|
B
|
80
|
C
|
40
|
D
|
140
|
E
|
67 ± 4
|