Insert the spider lockring tool into a vise

Be sure the vise will accommodate the spindle

Insert the spindle and lockring into the tool

Press down on the driveside arm and spindle assembly to ensure that is does not slip in the tool

Turn the crank counter-clockwise (as seen from above) too loosen the lockring

Be careful not to injury yourself on the sharp chainring teeth

I can be helpful to bump the arm loose rather than just applying steady pressure

Once the lockring is loose, unthread it completely

Remove the spider or integrated ring from the splines

The spider or ring will fit snuggly on the crank arm splines, it can be helpful to rock it in order to free it from the arm

Do not use a hammer to remove the spider or integrated ring

Thoroughly clean the splines on both the spider and arm

Clean the lockring

Lightly grease the splines on both the spider and the arm

Install the spider or integrated ring on the arm

Be sure to clock the spider properly such that the rings will line up in the right place

Press firmly to seat the splines

Since you will not be able to use a torque wrench, follow the procedure below to ensure proper torque

Lightly grease lockring threads

Install lockring

Put lockring and crank back into lockring tool in vise

Turn lockring until it begins to tighten on the spider face

Turn crank (or lockring) 90 degrees from touching the spider face to reach proper torque spec (approximately 30Nm)

Turn crank clockwise (as seen from top) to tighten