WM25, Ok to turn key on without starting, to watch fuel gage?

[SmallChange]

When I first insert the key and turn it to on, there's an immediate rapid ticking sound coming from near the fuel filter. I'm guessing that's a fuel pump? And the glow plugs start heating in preparation for starting.

But is it OK to leave the tractor in this state for a few minutes, so I can fill my fuel tank while watching the fuel gage? Or is it hard on anything because the tractor thinks it's going to be started momentarily?

Or should I start it and fill with the engine running? The tank's quite distant from the engine....

 

[Agvg]

No problem

 

[LouNY]

Either way, no problem.

 

[RalphVa]

Do it many times. Same on my car if I need the key on for something.

Ralph