Section R. 408.12235 - Mechanical condition and maintenanceRule 2235.
(1) Repair or service work shall not be performed on tractors or attachments while the engine is running, except to make those adjustments that cannot otherwise be made.(2) A ROPS structure shall not be welded, machined, or otherwise modified unless an engineer qualified in this field, a recognized testing laboratory, or the original manufacturer certifies that the welding, machining, or modification will not alter the original strength rating.(3) An employer shall not permit a tractor to be used if any of the following conditions exist: (a) The service or parking brakes do not perform their intended function.(b) The fuel system leaks.(c) A lift cylinder of a load-engaging means allows a downward drift of the load-engaging means, loaded or unloaded, in excess of 5 inches in 5 minutes.(d) A hydraulic system leaks and creates a hazard for an employee or equipment in the area.(e) The tractor runs in excess of normal operating temperature thereby creating a hazardous condition.(4) Repairs to a tractor shall not be made in a location made hazardous by the following conditions: (a) Flammable gases or vapors.(5) A replacement part that affects the safety of the operation of the tractor shall provide not less than the equivalent safety of the original part.(6) All repairs and modifications shall be made by authorized and qualified personnel.(7) Before servicing or repairing a hydraulic system of a tractor the pressure of the system shall be relieved.Mich. Admin. Code R. 408.12235