This International Standard lays down the dimensions of clear-ance envelopes for regular and heavy duty type truck transmission power take-offs. It is applicable to clearance envelopes required immediately adjacent to the PTO openings or drives on truck transmissions.
SIS SS-ISO 7706:1986 history
1986SIS SS-ISO 7706:1986 Road vehicles - Commercial vehicles - Clearance envelope for power take-offs (PTO)