Volvo D11F Operator's Manual And Maintenance Instructions page 35

Safety Information 31
DO NOT expose the engine to flames, driving over burning ground.
DO NOT weld or flame cut on or around pipes or tubes that contain
flammable fluids.
Exhaust heat shields may be installed to protect oil or fuel carrying lines and
pipes from hot exhaust parts. To protect from pipe or seal failure, install heat
shields correctly.
Provide adequate and proper waste oil disposal. Always dispose of waste
liquids according to Federal and local regulations. Oil and fuel filters should
be properly installed and housing covers tightened to the proper torque when
being changed.
Starting Aids
DO NOT use ether or other combustible starting aids on any engine
equipped with a preheater. If the engine is equipped with a preheater,
introduction of ether or similar starting aids could cause a fire or explosion
resulting in severe property damage, serious personal injury or death.
DO NOT use ether or other combustible starting aids on engines that
have a heater element or other heating devices installed in the intake
manifold for heating the intake air during cold-starts.