Detroit Diesel — Fuel Pump Driven Gear Bolt Torque Inspection and Replacement

A Detroit Diesel service procedure — check it applies to your exact model before use.

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Procedure

1. Remove the fuel pump.
2. Set the torque wrench to 30 N·m (22 lb·ft).
3. Turn the torque wrench as shown by the arrow in until the torque wrench clicks. This resistance ensures that the fuel pump drive gear is in good condition. In the event of NO resistance found with shaft turning freely, proceed to the next step.
4. Remove the fuel pump drive gear cover.
5. Remove the bolt and gear.
6. Check the mounting between bolt, gear, and shaft. Look for damaged parts. Replace damaged part.
7. Install gear and bolt. Apply Loctite 271 sealant to the bolt. For the correct tightening of the bolt, install the special tool J 46187 to the fuel pump spline and block the shaft movement.
8. Torque bolt to 35 N·m (26 lb·ft).
9. Install the camshaft cover and the new gasket (P/N: 4570110880). Torque 50 N·m (37 lb·ft).
10. Install the fuel pump and a new fuel pump gasket. Torque the fuel pump bolts to 25 N·m (18 lb·ft).

Source: manual:04ts53.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.