W 150 Pickup V8-360 5.9L VIN W (1987)
Brake Proportioning/Combination Valve: Application and ID
Fig. 23 Type 1, Combination Valve
Fig 2 Brake Warning Switch / Hold Off Valve (Cut Away View)
All models are equipped with a single hydraulic system control valve mounted on the frame rail below the master cylinder.
There are two types of control valves available on most models:
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On some models a brake warning switch is combined with a hold-off and proportioning valve assembly.
Hold-off cut in pressure .............................................................................................................................................................................. 117 PSI
Split Point (PSI)/Slope .............................................................................................................................................................................. 300/0.27
ID tag color .................................................................................................................................................................................................... White
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On other models a brake warning switch and hold-off valve assembly are combined -- without a proportioning valve.
ID tag color .................................................................................................................................................................................................... Black
Hold-off cut in pressure .............................................................................................................................................................................. 117 PSI
During any service procedures identify valve assemblies by part number as well as hold off/cut in (PSI) and split point (PSI).