ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 001-019   Crankshaft Gear, Front (Crankshaft Removed)

Use a heavy-duty bearing separator or gear puller, as illustrated, to remove the crankshaft gear.

Inspect for cracks and broken or chipped teeth.

The gear must be replaced if it is damaged.

Inspect the gear and keyway for nicks or burrs.

Use fine crocus cloth to remove nicks and burrs.

Inspect the crankshaft gear journal and the gear alignment dowel pin hole for burrs or damage.

Use fine crocus cloth to remove burrs.

Measure the crankshaft gear bore inside diameter.

Crankshaft Gear Bore Inside Diameter

Crankshaft Gear Journal Outside Diameter

CAUTION  Do not exceed the specified heating time or temperature. The crankshaft teeth can be damaged.

Use a soft hammer to install the gear alignment dowel into the crankshaft.

The pin must be 1.02 mm [0.040 in] above the crankshaft surface.

Heat the gear in an oven for a minimum of 45 minutes, but not more than 2 hours.

Use assembly lubricant, Part Number 3163087 or equivalent, to lubricate the outside diameter of the crankshaft gear journal.

WARNING  Wear protective gloves to reduce the possibility of personal injury when handling parts that have been heated.

CAUTION  The timing mark (1) and 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.

CAUTION  Do not use water or oil to reduce the cooling time. The gear can crack. Allow the gear to air cool.

Remove the gear from the oven.

Align the keyway of the gear with the alignment dowel pin in the crankshaft and install the gear within 30 seconds.

If the gear cools and stops on the crankshaft before it is fully installed, use a driver to complete the installation.

• Install the crankshaft.
• Operate the engine and check for leaks.