General Motors GMG-857 — 225 Series Electronic Actuator Installation
Installation · Electronic governor actuator
For the General Motors GMG-857, from the General Motors operator's manual.
Applies to: KEM GMG-857, General Motors 5.7L V8 (350 CID) engine
Before you start
- The actuator must be rigidly mounted as close as possible to the engine throttle lever.
Procedure
- Drill the actuator mounting holes in a pre-fabricated mounting bracket.
- Affix the actuator bracket to the selected location on the engine.
- Attach the actuator securely to the mounting bracket.
- Adjust and secure the linkage rod and rod end bearings.
- Fabricate a cable harness to connect the speed control unit to the actuator.
- Connect A and D of the military connector or the 2 pin connector harness to the speed control unit.
- Push the actuator lever to the maximum full fuel position and verify smooth return to minimum fuel.
Specs & values
- Recommended wire size at least #16 gauge (1.5 mm) for 12 volt systems, #18 (1.0 mm) for 24 volt systems
- Typical current 8 amps for 12 volt systems and 4 amps for 24 volt systems
- Maximum linkage misalignment 10 degrees
Full service-parts list: KEM GMG-857 →
Source: General Motors operator's 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.