What size are the large nuts on the crank and the clutch?

A puller on the flwheel after you remove the retaining nut tighten the puller and a table on the pller should loosen the flywheel .

hi there you need to take the clutch cover off after draining the oil ,remove the bolts going into the clutch basket take the springs out as well if you have the cash put in new springs when installing the clutch ,after you take the outer off then take out the plates and have acheck on size and wear ,then there should be a large nut and lock washer tap down the tab that stops the nut spinning loose then put your foot on the back brake and undo the nut this will be very tight if you have a air rattle gun this makes life a lot easier .then replacing the clutch basket it would be good sense to put a new bearing in the clutch houseing then put it back together in the oposite direction cheers hopes this helps cheers

John,
If this is a one-piece crank (both crank arms and the axle are all one piece) then you would need to tighten the bearing. This has an adjusting nut and a large locknut. There are special tools for this, but you can get by with a pipe wrench for the lock nut.
However, if this is a three-piece crank, then you probably have a loose crank arm (or two). The axle (which you cannot see) has square ends (about 1/2 inch) that are tapered toward the end (just a little smaller). The cranks have correspondingly tapered square holes. You simply have to tighten the nut or bold on the end of the axle to draw the tapered parts together tightly. There is probably a little cap covering the nut or bolt. The cap usually unscrews with a straight screwdriver. Common size for the nut or bolt is 14 mm. You will need a thin-wall socket for this, or a special crank-arm wrench. Park Tools is a great source for the special tool and lots of how-to info and videos. Good luck.

the clutch attaches to the crank like a large nut but it has left hand threads so turn it like you would tighten a normal bolt

to remove clutch fan you need to remove upper fan shroud, you need large wrench to remove the fan clutch retaining nut to remove fan and clutch away from the engine drive belt should keep pulley from turning while loosen fan clutch retaining nut.if pulley belt turns while loosen fan clutch bolt remove drive belt use strap wrench hold pulley while you remove fan clutch bolt this procedure for checvrolet if you working on volkswagon you need spanner wrench hold the idler pulley while you use large wrench to loosen the large drive nut to fan clutch. you have to remove fan with clutch from engine then you can remove clutch from fan you can go to auto parts stores rent a spanner wrench try auto zone they rent out tools.

YOU NEED TO HOLD FAN CLUTCH WITH A CLUTCH TOOL THEN LOOSEN THE LARGE NUT RETAINING THE FAN AND CLUTCH ASSEMBLY REMOVE FAN TO CLUTCH BOLTS AND NUTS COUNTERCLOCK WISE.

Ok, start by removing the side cover, there will be a large plastic nut with a flip up lever, undo the nut anti clockwise, now remove the guide bar and chain which are now free, there will be a c clip and washer holding the clutch drum on, remove the clip witha suitable screw driver, remove the large washer, the clutch drum will now just pull off, there is now a small washer to remove, you will now see the clutch, there is a special tool required to remove the clutch, it fits into the two half circle cut a ways in the clutch centre, the clutch is threaded onto the crank with a left hand thread, once the tool is fitted you put a 19mm spanner on the tool and jar it off against compression. The special tool is part no. 530031112.

after remove the 4 nuts in water pump need to remove a large nut in front of the fan.
on the back of the fan right in front of the pulley is your large nut.. grab the right sized wrench and hold the fan so it doesnt turn and crank on it. it should come off..
**** have a reverse thread**** loose to right

The big nut on the clutch unscrews from the pump. You'll need to get a chain strap wrench to hold the pulley or someway to hold the pulley, and a large wrench to loosen the nut.

You would be best getting an impact driver. Just put the right size metric socket on it then strike the end with a hammer to remove or to tighten the nut. Use it also to loosen and tighten the case screws. It is the most used tool in my shop. Sears has them as does any tool store. Just get a 3/8" drive (not the 1/2" drive) and you will make stuck screws, nuts and bolts a thing of the past.