Detroit Diesel — Remove Crankshaft Rear Timing Gear

Repair & overhaul · Crankshaft Timing Gears

From a Detroit Diesel service manual — check it applies to your exact model before use.

Procedure

1. Remove the flywheel housing from the engine.
2. Remove the crankshaft rear oil seal sleeve, if used, by peening the outside diameter until it stretches so it can be slipped off.
3. Before removing the crankshaft gear, align the timing marks of the gear train and note their location.
4. Remove the eight twelve-point bolts securing the rear timing gear to the crankshaft.
5. Utilizing the two 7/16"-20 tapped holes in the timing gear, use a suitable push puller and step plate adaptor to remove the gear from the crankshaft.

Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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