Isx engine brake adjustment

Isx engine brake adjustment:

Step 1- Locate the marks on the outside of the vibration damper 
The set marks are A,B, and C
Set A to adjust cylinder 1 or 6
Set B to adjust cylinder 2 or 5
Set C to adjust 3 or 4 

Note: The cylinders are are numbered from the front of the engine (1-2-3-4-5-6)
The firing order is 1-5-3-6-2-4 

Step 2- Remove the oil fill connector from the lower gear case cover
Insert a 3/4 inch drive ratchet and extension into the air compressor drive.
Rotate the air compressor clockwise, as viewed from the front of the engine.



Each cylinder has four rocker levers: 

• The Exhaust valve rocker lever
• The Injector rocker lever
• The Intake valve rocker lever
• The engine brake rocker lever

Note: the intake valve rocker lever is always the long lever on the valve rocker lever shaft

Step 3- Check the valve rockers on the given cylinder to see if both intake and exhaust valves are closed.

Note:  Both sets of valves are closed when the rocker levers and the brake lever are loose. If both sets are not closed, rotate the compressor drive gear one complete revolution, and align the A mark on the front damper with the pointer again. 

Step 4- Loosen the locknut on the brake lever adjusting screw, and back out the adjusting screw one turn. The insert the feeler gauge between the bottom of the engine brake piston and the top of the exhaust valve pin on the exhaust valve crosshead. The brake lever specification is 0.276 in. 

Step 5- Tighten the adjusting screw until drag on the feeler gauge is felt. Proper drag means there is no motion of the brae lever camshaft follower against the cam lobe. Hold the brake lever adjusting screw, and tighten the locknut.

Torque value: 177 in-lb 

You will then check the running clearance.

Our group has not made it this far, we are still adjusting the engine brakes. We were having some difficulties getting the engine to rotate at first, and a few of my teammates would disappear for what seemed like hours at a time. But with the help of Cummins quickserve and one other determined teammate, we have started the process of adjusting the engine brakes and are moving along rather nicely.