1 ENGINE SYSTEMS 55
Figure 47 Brake shut-off valve and brake actuator– OFF
1. High-pressure oil rail
2. Injector oil gallery
3. Brake oil gallery
4. Brake shut-off valve assembly
5. Brake actuator piston assembly
6. Exhaust valve bridge
7. Valve lash (ac tuator retracted)
8. Oil inlet
During normal engine operation, oil in the
high-pressure rail goes to the fuel injectors only. A
brake shut-off valve, mounted in the high-pressure oil
rail, is closed to prevent oil from entering the brake
gallery.
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
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