Detroit Diesel — Install Governor (PGA Hydraulic Governor)

Installation

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

Procedure

1. Measure center-to-center distance of the vertical link assembly and set rod ends to measure approximately 4.1875"; leave upper lock nut loose.
2. Install the gasket and boot retainer secured with three 5/16"-10 x 3/4" screws.
3. Apply the protective boot and secure to the boot retainer with the gear clamp.
4. Attach the gasket to the governor support housing cover.
5. Lower the governor over the mounting studs ensuring the splined shaft and vertical link rod engage properly.
6. Install lock washers and nuts on the mounting studs and torque to 58 lb-ft (79 N-m).
7. Check that the hole in the spherical bushing of the vertical link rod end lines up with the hole in the power piston rod end.
8. Remove governor cover and, using a power piston jack, raise the power piston until the scribed line lines up with the full load fuel scribe mark.
9. Adjust the center-to-center distance of the vertical link until the rod end hole and power piston clevis hole are within ± .010".
10. Install the clevis pin and retain with split pin; tighten the lock nut; remove jack and install governor cover.
11. Slide the protective boot over the boot retainer and install the clamp.
12. Connect all air and oil lines to appropriate connectors and plug in the electrical cable.
13. Fill the governor with oil to the prescribed level by removing the cap on the governor cover.

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.

More Detroit Diesel repair guides →