Cummins 4BT – Flywheel Housing Face Alignment – Check

Caution: The dial indicator tip must not enter the cap­ screw holes or the gauge will be damaged.
Install a dial indicator as illustrated.
NOTE: The extension bar for the indicator must be rigid for an accurate reading, ft must not sag. Position the indicator
at the 12 o’clock position. Adjust the dial until the needle points to zero.

Slowly rotate the crankshaft. Record the readings at the 3 o’clock, 6 o’clock and 9 o’clock positions.
NOTE: The crankshaft must be pushed toward the front of the engine to remove the crankshaft end clearance each
time a position is measured.

Continue to rotate the crankshaft until the indicator is at the 12 o’clock position. Check the indicator to make sure
the needle points to zero. If it does not, the readings will be incorrect.

Determine the Total Indicator Reading (TIR).

The maximum allowable Total Indicator Reading (TIR) is determined by the diameter of the housing bore. If out of
specifications, replace the housing.

Install both rear engine mounts.
Install the flywheel and clutch (if equipped). Refer to the manufacturer’s instructions.
Install the transmission and related components. Refer to the manufacturer’s instructions.

Install the starting motor.
Connect the battery cables.