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January 1, 2024 Service bulletin

Some Mack MMD trucks could experience an issue with the ignition lock cylinder sticking

Mack technical service bulletin M-834-001 202401 for 2020-2024 Mack MD.

Bulletin number
M-834-001 202401
Component
Electrical system
Summary
TSB: Some Mack MMD trucks could experience an issue with the ignition lock cylinder sticking. Trucks that experience a sticking lock cylinder could have a lock cylinder that becomes tight or sticks in the start position. If the above condition is found replace the ignition lock cylinder.

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