Magnum — Changing Output Voltage
Adjustments · Link/Reconnect Board
From a Magnum operator's manual covering: MMG320, MMG320 Super Start, MMG405, MMG405 Super Start, MMG465. Check it applies to your exact model before use.
Applies to: Magnum MMG320, Magnum MMG320 Super Start, Magnum MMG405, Magnum MMG405 Super Start, Magnum MMG465, John Deere RG6090HF485 engine, John Deere RG6135HF485 engine
Before you start
- NEVER ATTEMPT TO CHANGE THE VOLTAGE WHILE THE ENGINE IS RUNNING. LETHAL VOLTAGE MAY BE PRESENT AT THE CONNECTION LUGS ON THE SHORTING (LINK) BOARD.
Procedure
- Shut the generator down and set main circuit breaker and control power switch to OFF.
- Remove all 1/2 in. nuts holding the shorting (link) board.
- Move the board to the lower position for 480/277V 3Ø or the upper position for 208/120V 3Ø.
- Replace all hardware and tighten to 25 ft-lbs of torque.
- Reinstall the reconnect box door and start the generator per the Pre-Start Check List.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 25 ft-lbs torque
Full service-parts list: Magnum MMG320 →
Source: Magnum 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.