Workshop Manual

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 t

he engine

brakes. O il for cylinders 1 and 2 is supplied by the Front Engine Brake Solenoid Valve. Oil for

cylinders3to6aresuppliedbytheRear Engine Brake Solenoid Valve.

1. Exhaust Rocker Arm 7. Exhau st Camshaft

2. Exhaust Rocker Arm with Actuator Piston 8. Actuator Piston

3. Brake Rocker Arm 9. Exhaust Valve

4. Oil Passag e for Cylinders 1 and 2

10. Brake Cam Lobe

5. Oil Pa ssage for Cylinders 3, 4, 5 and 6

11. Engine Brake Solenoid Valve, Front

6. Exhaust Rocker A rm Shaft

12. Engine Brake Sol enoid 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.