Angle grinder's 4" disc saw facing clockwise or anti clockwise/

The button does not disengage the blade, it only locks the blade/motor from spinning so you can remove the locking nut. Lock the spindle/motor/ blade, from moving and then remove the locking nut or disk. Should be counter-clockwise.

PLACE THE PAPER ON THE DISC EITHER WAY UP OR DOWN THE DISC IS NOT DIRECTIONAL UNLESS STATED ON THE LABLE

as its a grinder...there are not many attachments available....just your common grinding and cutting discs.

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You need the 4" rubber pad, Makita Part #743009-6. It can be found on websites like www.ereplacementparts.com.

check your arbor size. (hole in middle of disc's) they must match up

You turn counter clockwise to loosen it. It might be pretty tight.

Yes you need an angle grinder spanner/wrench. It is like a tool with two pins that fit in the holes of the grinder disc securing nut. You can see a picture of one here: http://images.toolspot.co.uk/Angle%20Grinder%20Accessories/Angle%20Grinder%20Spanner%20For%20412in.jpg

They do come in different sizes, but you can also buy adjustable ones. Your best bet is to take the grinder to the local hardware store, big box outlet or anywhere power tools are sold and they should have a grinder spanner to suit your grinder.

Do you have the securing nut on the correct way? Basically the inner surface of the nut needs to be flat against the blade for it to work correctly and hold the cutting disc in place Usually the nuts are reversible to fit either flat discs or rounded disc heads. It's either that or you do not have the right size bore on the diamond disc for your grinder.

You can download a manual for a 9" unit (9069S) from
http://www.materielsektionen.dk/skabelon/pdf/359.pdf

I know it's a Danish site, but the manual itself is multi-lingual and includes English.

What sort of disc do you have on there at the mo? If its just an abrasive disc the easiest way to remove it is to use a hacksaw to cut the disc sideways so that you are actually sawing it out between the lock nut and rear flange. This will release the pressure on the nut. If it is a diamond blade and you have already snapped a pin spanner then I would suggest securing the blade in a vice and using a set of stiltsons/pipe wrench. While in the vice you could also try using a punch in the pin holes to shock it round a bit, then the pin spanner (and leverage if needed).