Section R. 408.41978 - Hydraulic and pneumatic systemsRule 1978.
(1) A hydraulic or pneumatic system shall be designed and constructed to have a safety factor of not less than 4.(2) Hydraulic or pneumatic flexible lines shall be protected from chafing.(3) To provide for the safety of employees working on or about equipment, when hydraulic, air, or steam lines are bled, equipment supported by these systems shall be physically blocked or otherwise secured by means other than components in the circuit.Mich. Admin. Code R. 408.41978