Detroit Diesel — Installing Adaptor Block and Tapping Tool J-47485

Installation · Cylinder block rear face / adaptor block

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

Procedure

1. Ensure all gasket material is removed from the rear face of the cylinder block; surface must be clean and dry.
2. Install Adaptor Block (J-47485-1) to the rear face using the two M10 x 1.5 attaching bolts; tighten finger tight only at this time.
3. Install Air Fitting Adapter (J-47485-3) in the top hole and Centering Adapter (J-47485-4) in the bottom hole of the Adaptor Block.
4. Finger tighten the two set screws.
5. Tighten the two M10 x 1.5 attaching bolts to 33 N·m (24 lb·ft).
6. Loosen the Centering Adapter (J-47485-4) set screw and remove it from the bottom hole; leave the Air Fitting Adapter (J-47485-3) in place.
7. Clean and inspect the tap before using; a spare tap is included in the kit.
8. Apply a light coat of clean engine oil to the shaft of the Tap (J-47485-5) and install the Tap Guide Assembly (J-47485-6) into the bottom hole of the Adaptor Block.
9. Fully seat the Tap Guide (J-47485-2) into the Adaptor Block and tighten the set screw.

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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