Master Cylinder made by LUCAS

SOURCE: how to Remove rear brake drum to replace pads.

hi! the pads will be rutted into the drum, you need to release them first with the cables backed off and the cams wound down, then just tap off the drums!

SOURCE: Rear brake drums won't come off

Try penetrating oil around center hole and 8mm holes if rust is present. Then, pound hard on the radius edge between face of drum and top/bottom braking surface.

If no luck, you might need to back off the shoe adjustment rod located behind an oblong hole on the bottom of the backing plate.

Youll see small teeth if you view through the oblong hole(might have a rubber plug in it)
Put a screwdriver in the hole and try to ratchet the teeth in one direction or another (it will only go in one direction) once you see which way it moves, usually with a corresponding "click", Stop........you need to turn it the other way.

To do this, you must take a small thin screwdriver or ice pick and poke it in past the small toothed gear until it hits a surface. Put more pressure and you should feel it move.
This is the ratcheting arm that kept you from moving the gear in the other direction.

Now you should be able to turn the toothed wheel in the opposite direction to loosen the brake shoes from the braking surface of the drum.

The 8mm bolt holes are there to help pull the drum, but, if the shoes have worn into the drum a lot, it leaves an edge on the inner edge of the drum which wont let the drum slide past the shoes, which is why you need to back off the adjustment rod to pull the shoes away from the drum to allow it to be removed.

If all else fails, the shoes are held against the backing plate by two pins, held in place by small coil springs and keeper plates.

If you look at the backing plate, you should see two small circular discs at the roughly 3 oclock and 9 oclock positions. These are the heads of the keeper pins which hold the shoes on to the backing plate. Take a small and preferably sharp chisel, and shear these small discs off the backing plate. Now, you should be able to pry off the drum and survey the damage. You will need to replace these parts. Ask your parts dealer for a "spring kit" for the rear drum brakes of your particular vehicle.

Hope this helps

SOURCE: problems with clutch master cylinder on a suzuki

I too am having problems with my 2006 GV clutch master cylinder. I noticed gradually over several weeks the gears and clutch pedal were degenerating and then the cluth gave completely. My mechanic took a look around and said the cylinder is the cheapest one he has ever seen, it's just a piece of plastic apparently! Is going to hopefully get the part this week or next, though he said as it's such a cheap and nasty part its likely it will happen again in the future. Not happy!

SOURCE: change rear brake pads on Suzuki Grand Vitara 2001

you will see a hole which is theaded on drum, slacken hand break cable, then screw a bolt into the hole, this will push off drum, dont no what size bolt is, you can buy a selection cheap at b.q