Thermo King T-500R Maintenance Manual page 169

a. Rotate the engine in the normal direction of rotation (counterclockwise viewed from the flywheel end) until the top
dead center timing mark for the number 3 cylinder on the flywheel lines up with the index timing mark on the starter
mounting plate.
b. Check the rocker arms on the number 3 cylinder to see if they are loose.
c. If the rocker arms are loose, the engine is at top dead center of the compression stroke for the number 3 cylinder.
d. If the rocker arms are tight, the engine is at top dead center of the exhaust stroke for the number 3 cylinder. Rotate the
engine 360 degrees to place the engine at top dead center of the compression stroke for the number 3 cylinder.
8. Check and adjust both valves for the number 3 cylinder.
9. Place the engine at top dead center of the compression stroke for the number 2 cylinder.
a. Rotate the engine in the normal direction of rotation (counterclockwise viewed from the flywheel end) until the top
dead center timing mark for the number 2 cylinder on the flywheel lines up with the index timing mark on the starter
mounting plate.
b. Check the rocker arms on the number 2 cylinder to see if they are loose.
c. If the rocker arms are loose, the engine is at top dead center of the compression stroke for the number 2 cylinder.
d. If the rocker arms are tight, the engine is at top dead center of the exhaust stroke for the number 2 cylinder. Rotate the
engine 360 degrees to place the engine at top dead center of the compression stroke for the number 2 cylinder.
10. Check and adjust both valves for the number 2 cylinder.
11. Replace the cylinder head cover.
Engine Maintenance 9-31