Detroit Diesel — Remove Governor (PGA Hydraulic Governor)
Repair & overhaul
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- The governor and top of the engine in the vicinity of the governor must be thoroughly clean and free from loose scale and debris
Procedure
- Disconnect the electrical cable to the governor by unscrewing the connector counterclockwise.
- Drain the governor by means of the oil drain cock on the power case.
- Disconnect all air and oil lines and identify each line to its connector; cap all hoses and plug all connectors.
- Loosen governor control rod boot clamp and ease the boot upward until the control rod clevis pin is exposed.
- Remove the split pin and the clevis pin from the control rod.
- Remove the four 1/2"-13 UNC nuts and lock washers securing the governor to the governor support cover.
- Screw a 3/8"-16 UNC bolt into the top of the governor and carefully lift the governor clear using suitable lifting tackle.
- Stand the governor vertically on a wooden base with holes to accept the gear box and power piston.
- Remove and discard gasket and cover the governor and control rod openings.
- Remove the gasket and boot retainer.
Tools required
- suitable lifting tackle Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.