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Hydraulic System Junction Block|Specifications|Page 3566 > < Hydraulic System Junction Block|Specifications
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Hydraulic System Junction Block: Description and Operation

JUNCTION BLOCK

DESCRIPTION 

The junction block and a rear brake proportioning valve. The valve is not repairable and must be replaced as an assembly if diagnosis indicates this is
necessary.

OPERATION 

PROPORTIONING VALVE 
The proportioning valve is used to balance front rear brake action at high decelerations. The valve allows normal fluid flow during moderate braking.
The valve only controls fluid flow during high decelerations brake stops. If the primary brake hydraulic circuit cannot build pressure a by-pass feature
is activated allowing full flow and pressure to the rear brakes.

Hydraulic System Junction Block|Specifications|Page 3566 > < Hydraulic System Junction Block|Specifications