Reely 1:10 RC model car Electric Monster truck FS-53801-6 用户手册

Two ball head screws "B4" are screwed into an axle leg "B3" each. Then they are both fastened using a sliding sleeve
"B5" and a plastic grub screw "B6".

If you carefully look at the grub screw "B6", you will see an opening
on one side into which the sliding sleeve "B5" is pressed.

Use a hex key to fasten the grub screw "B6". Do not apply force.
Screw it in until the ball head screw "B4" is not loose any more but at
the same time is not firmly screwed in either. The ball head screw
"B4" must be easily movable.

Make sure that the alignment of the axle legs on the left and the right
side of the vehicle is correct. The illustration on the right shows the
right axle leg. Note the different shapes at the top and the bottom of
the axle leg as illustrated.

Use a small hex key to screw the ball head screws into the control arms.

Screw the ball head screws into the control arms by about 2/3 to 3/4 of the thread
length.