N14 Base Engine Troubleshooting and Repair Manual – 001-018   Crankshaft Gear, Front (Crankshaft Installed)

Remove the front engine mount, vibration damper, and the crankshaft pulley. Refer to Procedures

001-052-002 and

001-022-002, respectively.

Remove the accessory drive pulley. Refer to Procedure

009-004-002.

Remove the front crankshaft seal and the accessory drive seal. Refer to Procedures

001-023-002 and

001-003-002, respectively.

Remove the gear cover. Refer to Procedure

001-031-002.

Install the crankshaft gear puller, Part No. 3375840, and jaw onto the gear, Part No. 3824284.

Turn the pressure screw

clockwise
to remove the gear.

CAUTION  Do not damage the crankshaft when removing the key.

Use a flat chisel and a mallet to remove the crankshaft gear key.

Clean the gear with solvent. Dry with compressed air.

Visually inspect the crankshaft gear for cracks and broken or chipped teeth.

Remove any burrs with a fine crocus cloth.

Visually inspect the crankshaft gear fit area for burrs.

Remove any burrs with a fine crocus cloth.

Scratches

must not
exceed 0.79 mm [0.031 inch] depth, and

must
be at least 3.2 mm [0.125 inch] apart.

Measure the crankshaft gear bore.

Replace the crankshaft gear if it does

not
meet diameter specifications.

Measure the crankshaft gear fit area outside diameter.

Replace the crankshaft if it does

not
meet diameter specifications.

Use a leather mallet to install a new key into the crankshaft keyway.

Heat the gear in an oven for a minimum of 1 hour at 204°C [400°F]

not
to exceed 4 hours maximum.

CAUTION  Wear protective gloves when handling parts that have been heated to prevent personal injury.

Remove the gear from the oven.

NOTE: The gear

must
be installed within 30 seconds after being removed from the oven.

CAUTION  The timing mark (1) and the gear part number (2) must be facing away from the crankshaft.

Align the gear keyway and the key, and install the gear firmly on the crankshaft.

Install the gear cover. Refer to Procedure

001-031-026.

Install the accessory drive pulley. Refer to Procedure

009-004-026.

Install the accessory drive seal. Refer to Procedure

001-003-026.

Install the front crankshaft seal. Refer to Procedure

001-023-026.

Install the crankshaft pulley, the vibration damper, and the front engine mount. Refer to Procedures

001-022-026 and

001-052-026, respectively.

Operate the engine until it reaches a temperature of 82°C [180°F], and check for lubricating oil leaks.