Kohler — Arc Chute Replacement (100-400 Amp 3-Phase)
Repair & overhaul
From a Kohler service manual — check it applies to your exact model before use.
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Before you start
- Hazardous voltage. Disconnect all power sources before opening the enclosure.
Procedure
- Prevent all connected generator sets from starting (master switch OFF, disconnect battery charger, disconnect starting battery negative lead first).
- Disconnect power to the transfer switch, open the enclosure, and verify zero volts across each phase.
- Remove the arc chute hold down screws.
- Remove the arc chute and inspect the movable contact for damage; order a replacement contactor if damage is found.
- Install the new arc chute and holding screws with washers, and torque screws to 2.8 Nm (25 in. lb.).
- Manually operate the switch several times to ensure it does not stick.
- Close the enclosure, reconnect power, enable the generator set, move master switch to AUTO, and test operation.
Tools required
- Basic electrician's hand tools
- Rubber insulating gloves class 0 Amazon
- Safety glasses Amazon
- Electrical hazard safety shoes Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Arc chute holding screws torque 2.8 Nm (25 in. lb.)
Source: Kohler 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.