I've seen an operator argue with a manager before over picking up a load.

Manager insisted the 4 ton counter balance truck could pick the load up, the operator said NO it can't as the truck capacity is de-rated due to the double handling attachment fitted to it.

Operator logged of the truck & refused to pick the load up so the manager had a go.

Operator was proved completely correct as the manager attempted to lift the load & the back wheels started to lift of the floor.

Linde H40 - 394 de rated from factory to 2803kg @ 600mm load centre due to double handling attachment fitted.