Volvo VNL Operator's Manual page 107

102 Instruments and Controls
Engine Mounted PTO
The engine should be running at low idle
and the vehicle should be stopped or run-
ning at very low speed before engaging
power take off. Engage the PTO by press-
ing in the bottom part of the switch. The
PTO is now in operation and hydraulic flow
W3001993
can be regulated by the engine speed.