EMD — Inspect the valve bridge and spring seat at the points

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

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Procedure

1. 1. Distance between rocker arm guide ears.
2. 2. Lash adjuster socket diameter.
3. 3. Valve bridge shank length.
4. 4. Shank diam eter from shank end to 63.5 mm (2.50")
5. 5. Spring seat rim thickness.
6. 6. Spring seat spherical radius.
7. 2 - 13

Source: manual:emd-645-e3-workshop-manual.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.