ISM, ISMe, and QSM11 – 020-024   Engine Brake

Loosen the locknuts on the secondary pistons.

Make sure the secondary pistons are fully retracted.

Install the rear engine brake housing on the rear rocker lever supports.

Use clean 15W-40 oil to coat the threads and the bottom side of the capscrew head.

NOTE: Washers are not used with the capscrews.

Install the capscrews in the rocker lever supports.

Do not tighten the capscrews.

Use clean 15W-40 oil to lubricate the o-rings.

Press the connector all the way into the front housing by hand.

When installing the front housing, be sure the oil connector and o-ring are in a position to be pushed into the rear housing.

Install the front engine brake housing on the front rocker lever supports.

Center the oil connector between the front and rear housings before tightening the capscrews.

Tighten the capscrews in the sequence shown.

Install the internal oil connector supply hose, and tighten the capscrews.

Install the external oil connector supply hose, and tighten the capscrews.

Connect the solenoid power and ground wires to the terminals on the inside of the rocker lever housing, red wire to the rear housing solenoid and white wire to the front housing solenoid.

CAUTION  Do not tighten the adjusting screw too tightly. The engine can be damaged.

CAUTION  Failure to have the correct clearance can damage the engine.

To obtain maximum brake operating efficiency, and prevent engine damage by piston-to-valve contact, complete the following instructions carefully.

Adjust the exhaust valves on the appropriate cylinder. Refer to Procedure 003-004 in Section 3.

After adjusting the exhaust valves on the appropriate cylinder, insert the correct feeler gauge.

Turn the secondary piston adjusting screw down until it touches the feeler gauge.

Hold the screw in position, and tighten the locknut.

After the secondary piston adjusting screw locknut is tightened to the correct torque value, check the clearance with the feeler gauge again.