Engine coolant temperature must be less than 60ยฐC [140ยฐF]
Use the barring tool, Part Number 3824591, to rotate the crankshaft until the number 1 cylinder is at TDC.
The TDC indicator is on the vibration damper.
Align the vibration damper so the TDC indicator is at the 12 o’clock position.
NOTE: If no TDC mark is present on either the vibration damper or the crankshaft speed indicator ring, align the
large gap in the crankshaft speed indicator ring to the 5 o’clock position (2). The dowel pin will be visible in the 9
o’clock position (1). Check that both number 1 cylinder rocker levers are loose. If they are not loose, rotate the
crankshaft 360 degrees and check again.
If both of the number 1 cylinder rocker levers are loose, proceed to the next step; If the number 1 cylinder rocker
levers are not loose, rotate the crankshaft 360 degrees and proceed to the next step.
Be sure to check the engine dataplate for correct valve lash (overhead set) specifications.
The engine dataplate is typically located on the engine rocker lever cover, but may also be located on the left side
of the gear housing. Refer to Procedure 100-001 in Section E.
If the number 1 cylinder is at TDC and both rocker levers are loose, the valve lash (overhead set) can be checked
on the following rocker levers:
(E = exhaust, I= Intake)
11, 1E, 21, 3E, 41, and 5E.
Checking the overhead setting is usually performed as part of a troubleshooting procedure, and resetting is not
required during checks, as long as the lash measurements are within the specifications shown above.
The clearance is correct when some resistance is felt when the feeler gauge is slipped between the crosshead
and the rocker lever socket.
Measure the valve lash (overhead set) by inserting a feeler gauge between the crosshead and the rocker lever socket.
If the measurement is out of specification, loosen the locknut and adjust the lash to nominal specifications.
Tighten the locknut and measure the clearance again.
Torque Value: 24 Nโขm [ 212 in-lb ]
Use the barring tool, Part Number 3824591, to rotate the crankshaft 360 degrees.
Use the previous steps and specifications to set the valve lash on the following rocker levers:
(E = exhaust, I= Intake)
2E, 31, 4E, 51, 61, and 6E.
If the measurements are out of specification, set the valve lash.
