Cummins N14 – Flywheel – Installation

NOTE: Use a new pilot bearing when installing a new or rebuilt clutch.

Use a mandrel and a hammer to remove the pilot bearing.
Use Scotch-Briteா 7448, Part No. 3823258, to clean the pilot bore.

Use a mandrel and a hammer to install the pilot bearing.

NOTE: The pilot bearing must be installed flush with the pilot bore surface.

Install two t-bolts into the flywheel clutch mounting surface.
Install two 5/8 – 18 x 6-inch guide studs in the crankshaft flange.
Install the flywheel on the guide stud.

Lubricate the threads of the capscrews and the surface of the washers with 15W-40 lubricating oil.

Install the four capscrews.
Remove the t-bolts and the guide studs.
Install the remaining two capscrews in the holes from which the guide studs were removed.
Tighten the capscrews in a star pattern.
Torque Value: 271 N•m [200 ft-lb]

Bore Alignment – Measurement
Use dial indicator gauge (1), Part No. 3376050, or its equivalent and dial gauge attachment (2), Part No. ST1325, to inspect the flywheel bore (3) and the surface (4) runout.
Install the attachment to the flywheel housing.
Install the gauge on the attachment.
Install the contact tip of the indicator against the inside diameter of the flywheel bore, and set the dial indicator to ‘‘0.’’

Rotate the crankshaft one complete revolution.

NOTE: The total indicator runout (T.I.R.) must not exceed 0.127 mm [0.0050-inch].

If the T.I.R. is greater than the specification, remove the flywheel.

Inspect the flywheel mounting surface for dirt or damage.

Inspect the crankshaft for dirt or damage. Replace the crankshaft if necessary.

Install the flywheel, and inspect the bore runout again.

Replace the flywheel if the runout does not meet specifications.

Face Alignment – Measurement

Install the contact tip of the indicator against the flywheel face, as close to the outside diameter as possible, to inspect the face (4) runout.
Push the flywheel forward to remove the crankshaft end clearance. Adjust the dial on the indicator until the needle points to ‘‘0.’’

Rotate the crankshaft one complete revolution. Measure the flywheel runout at four equal points on the flywheel.

NOTE: The flywheel must be pushed toward the front of the engine to remove the crankshaft end clearance each time a point is measured.

The total indicator runout (T.I.R.) must not exceed the following specifications:

If the flywheel face runout is not within specification, remove the flywheel. Check for nicks, burrs, or foreign material between the flywheel mounting surface and the crankshaft flange.

15. October 2020 by samuel
Categories: Cummins N14 | Comments Off on Cummins N14 – Flywheel – Installation