The truck manufacturer states that when the forks are parallel to the floor there should be between 10mm & 15mm clearance between the bottom of the fork & the floor.

The speed limiting functions when the mast is reached out / raised in to main lift / travelling forks first are standard equipment on this family of reach trucks - all the different functions just need to be turned ON or OFF by a technician as the customer wishes.

As for lift chain adjustment it depends on the truck, some mast designs wont allow the forks to clear the floor when fully lowered & some other mast designs can actually snap the lift chains if there adjusted incorrectly trying to get the forks clear of the floor.