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Subchapter 7. General Industry Safety Orders
Group 13. Cranes and Other Hoisting Equipment
Article 94. Hydraulic Cranes and Excavators

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§4955. Hydraulic Relief Valves.

Hydraulic relief valves shall have pressure settings of sufficient magnitude to provide the capabilities of operations under 110% of rated loading conditions. Relief valve settings shall be specified and no change in relief valve setting shall be made without the consent of the certified agent. Gauge ports shall be provided in each hydraulic circuit for checking certified agent's specified pressure settings.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.


1. Amendment filed 8-29-86; effective thirtieth day thereafter (Register 86, No. 39).

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