12. Check and Bleed Valve
a. Location. The three-way check and bleed valve is located at the unloader pilot valve and is connected to the intake
valve unloaders and to the slowdown assembly.
Figure 10. Hose reel and service valve.
b. Purpose. The action of a ball in the valve checks the return flow of air from the intake valve unloader and bleeds
the air from the slowdown assembly at the same time. This enables the slowdown assembly to provide engine acceleration
before the intake valves are fully closed.
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