ENGINE SYSTEMS 55
Figure 4 8 Brake shutoff valve and brake actuator– OFF
1. High-pressure oil rail
2. Injector oil gallery
3. Brake oil gallery
4. Brake shutoff valve assembly
5. Brake actuator piston assembly
6. Exhaust valve bridge
7. Valve lash (actuator retracted)
8. Oil inlet
During normal engine operation, oil in the
high-pressure rail goes to the fuel injectors only. A
brake shutoff valve, mounted in the high-pressure oil
rail, is closed to prevent oil from entering the brake
gallery.
EGES-265-2
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
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