Michigan Administrative Code
Department - Labor and Economic Opportunity
MIOSHA
General Industry and Construction Safety and Occupational Health Standards
General Industry Safety Standards
Part 22 - TRACTORS
Section R. 408.12212 - Modifications

(1) An additional counterweight, excluding wheelweights, or other counterweights supplied by the manufacturer and used as recommended, shall not be installed on a tractor by the employer without written assurance from the manufacturer of the tractor that the stability of the tractor is maintained.

(2) Other modifications affecting the tractor's capacity or safety shall not be made without written approval of the manufacturer, the special equipment manufacturer, or an engineer knowledgeable on the subject. Capacity, operation, and maintenance instruction plates, tags, or decals shall be changed accordingly.