Detroit Diesel EPA07, Workshop Manual

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EPA07/10 DD PLATFORM WORKSHOP MANUAL - ENGINE
For EPA07 engines, the exhaust rocker arm shaft lubricating oil passages direct pressurized oil to
the rocker arms. The exhaust rocker arm has two additional oil passages to operate the engine
brakes. Oil for cylinders 1 and 2 is supplied by the Front Engine Brake Solenoid Valve. Oil for
cylinders 3 to 6 are supplied by the Rear Engine Brake Solenoid Valve.
1. Exhaust Rocker Arm 7. Exhaust Camshaft
2. Exhaust Rocker Arm with Actuator Piston 8. Actuator Piston
3. Brake Rocker Arm 9. Exhaust Valve
4. Oil Passage for Cylinders 1 and 2
10. Brake Cam Lobe
5. Oil Passage for Cylinders 3, 4, 5 and 6 11. Engine Brake Solenoid Valve, Front
6. Exhaust Rocker Arm Shaft 12. Engine Brake Solenoid Valve, Rear
Figure 2-2 EPA07 Engine Brake
For EPA10 engines:
□ Engine brake solenoid valve in front of engine applies low engine braking.
□ For medium engine braking, both front and rear solenoids are activated.
□ For high, both front and rear solenoids are activated, along with EGR.
□ Six exhaust rocker arms with actuator pistons.
□ Six brake rocker arms which are actuated by the brake cam lobes.
□ Exhaust camshaft has one brake cam lobe per cylinder.
All information subject to change without notice.
DDC-SVC-MAN-0081 2010 Copyright © 2010 DETROIT DIESEL CORPORATION
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