Don't let a gear train error sideline your rebuild. Learn how to use the J-35906-A Cam Gear Pilot to ensure flawless timing on Series 60 engines.

Why Gear Pilotage Matters

The cam gear on a Detroit Diesel Series 60 must be perfectly concentric with the camshaft. Without the J-35906-A pilot tool, it is remarkably easy to install the gear slightly off-center before the bolts are torqued. This minor misalignment causes "gear runout," leading to a noisy engine and eventual tooth failure. By using a pilot, you provide a rigid guide path that keeps the gear and camshaft locked in a perfect relationship during the mounting process.

Installation Steps for the J-35906-A

1. Mounting the Pilot: Secure the J-35906-A pilot tool onto the end of the camshaft. Ensure it is firmly seated to provide a stable guide.
2. Gear Positioning: Slide the cam gear over the pilot. The tool’s precision diameter ensures the gear cannot tilt or shift off-center.
3. Initial Bolt-Up: Install your cam gear bolts (compatible with both old and new styles). The pilot holds the gear in alignment while you hand-tighten the fasteners.
4. Tool Removal: Once the gear is safely positioned and partially secured, remove the pilot tool to allow for final torque.
5. Torque Sequence: Proceed with the Detroit-specified torque-to-yield sequence to lock the timing in place.

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