CUMMINS N14 Specifications download pdf (Page 230)

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101

Caution: Always wear protective gloves when handling

heated parts. Personal injury can result.

Caution: The timing mark (1) and the part number (2) on

the gear must be facing away from the crankshaft after

the gear is installed. Engine damage can result if the

gear is installed backwards.

Remove the gear from the oven.

Align the keyway of the gear with the key in the crankshaft,

and install the gear within 30 seconds.

Caution: Do not use water or oil to reduce the cooling

time. The gear can crack. Allow the air to cool the gear.

Crankshaft Bearings - Cleaning and

Inspection (01-16)

NOTE: The bearings must be marked for location as they are

removed for future identification. Each bearing must be

installed in its original location if the bearing is used again.

Main Bearings - Cleaning

Caution: Do not use a scraper or a wire brush. The bear-

ings can be damaged.

Use solvent and a soft bristle brush. Dry with compressed

air.

Main Bearings - Inspection

Visually inspect the bearings for damage.

Replace any bearings with the following damage:

• Pitting

• Flaking

• Corrosion

• Lock notch damage

• Scratches (deep enough to be felt with a fingernail)

Refer to the Parts Reuse Guidelines, Bulletin No. 3810303,

for additional information.

Use an outside diameter ball tipped micrometer to mea-

sure the main bearing shell thickness at the wear loca-

tion.

Main Bearing Shell Thickness (Standard)

mm in

3.086 MIN 0.1215

3.142 MAX 0.1237

Discard a main bearing shell if its thickness is below the

minimum specification.

NOTE: For more detailed information of bearing damage,

refer to Analysis and Prevention of Bearing Failures, Bulletin

No. 3810387.

Crankshaft Bearings - Cleaning and Inspection (01-16) Cylinder Block

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