Workshop Manual

2.1 DESCRIPTION AND OPERATION OF CAMSHAFT AND ROCKER SHAFT/ENGINE BRAKE ASSEMBLY

AND RELATED PARTS

For EPA10 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 t

he engine

brakes. Oil for cylinders 1 through 3 is supplied by the Front Engine Brake Solenoid Valve. Oil

for cylinders 4 through 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 Pisto n

3. Brake Rocker Arm 9. Exhaust Valve

4. Oil Passage for Cylinders 1, 2 and 3

10. Brake Cam Lobe

5. Oil Passage for Cylinders 4, 5 and 6

11. Engine Brake Solenoid Val

ve, Front

6. Exhaust Rocker Arm Shaft

12. Engine Brake Solenoid Valve, Rear

Figure 2-3 EPA10 Engin e Brake

All information subject to change without notice.