DROP THROUGH LONGBOARD

To adjust how a truck turns, you need to find your skateboard's kingpin. Tightening the kingpin with a T-tool will make your skateboard more rigid. On the other hand, loosening it will make it more manoeuvrable.
But be careful not to overtighten the hanger as this could damage the surrounding bands.
If you loosen the kingpin too much, you may experience wheel bite. This is when the wheel touches the board while turning, causing it to instantly lock up.

As with the trucks, use your T-tool to loosen the nut around the axle (at the end of the truck axle) to free the wheel from its nut. Be careful to only loosen it slightly so that the wheel can turn without coming off the truck.

"Drop through" trucks are mounted to the top of the deck and pass through a pre-cut hole .
You cannot mount your trucks without disassembling them.

Start by loosening and removing the kingpin nut, then remove the top bushing washer (cone/roadside), the hanger, the bottom bushing (barrel/boardside) and its washer.
Be careful not to lose your pivot cup.

Put the base plate on top of your board so that the kingpin faces the mounting hole on the deck. Keep in mind: the kingpin goes outwards!

After attaching the two baseplates and bushings, you can reassemble your trucks. The order (from the base of the kingpin) should be as follows:

1 - baseplate
Screw the baseplate onto the deck as this will make everything else easier.
2 - cup
3 - boardside bushing
4 - hanger
5 - roadside bushing
6 - washer
7 - kingpin nut (pivot) to hold everything together.

Be sure to properly situate the hanger's pivot in the baseplate pivot cup.

Only tighten the lower bushing nut until there is no play in the hanger.You can gauge by leaving one or two screw threads visible.

Finally, use the T-tool to tighten your bolts until the nut can't go any tighter.