How to replace saw blade and re assemble the blade guard

Ask them direct for a parts schematic

Mitre Saws

GMC Tools https://www.gmctools.com > en-GB > Saws > Mitre Saws
Metal fixed guard, arm assembly, mitre table and fence. Bench mountable base. Folds down for compact storage. Includes clamp, dust bag, 2 hex keys, ...

Global Machinery Company Saw Product Support

Manuals Online http://www.manualsonline.com > support > gmc-1 > saw
I need a blade guard for a GMC compound miter saw. Global Machinery Company Saw MS 1015 AUL ... I need parts list for Global machinery Company mit.

Parts

Global Machinery https://www.globalmachinery.com > parts
We offer a full line of replacement parts to repair and service all of the equipment that we sell and rent. Not only are we able to supply you with the specific ....

1. Unplug saw
2. Remove the blade
3. Lower mechanism all the way to the bottom
4. Flip over saw and lay on it's top
5. Remove the blade guard panel opposite the motor
6. Unbolt the motor assembly and remove the belt cover
7. Replace the broken belts
8. Re-assemble (be careful not to cross-thread the bolts in the aluminum housings!)

http://bt3000.com/Manuals/BT3000-Parts-Manual.pdf

Sound like a piece of wood may have driven the arm up which operates the guard, if you remove the screws holding the guard support plate to the saw you should be able to remove the guard assembly, the arm can then be re-bent down on the end so that it meets the angled plate on the back of the guard and pushes the guard through the entire stroke, the other reason could be a damaged guard, when the centre screw is removed the plates can be removed from the guard, note how the spring and plates are assembled prior to dismantling, check the inside centre of the perspex guard and ensure the 4 protrusions which engage with the drive plate haven't broken off, if sow the guard will need to be replaced, this may now be an obsolete part , if so purchase a Makita guard as they are the same

http://www.ereplacementparts.com/guard-you-will-need-order-48887000-center-plate-p-89251.html?osCsid=n1f7mnemsda5as6odhsr04m1i3

As long as your model number was good..... You don't need the entire assembly right? Just the guard. $14+ +shipping.

Removing the Blade
1. Unplug the saw.
2. Raise the arm to the upper position and raise the lower guard as far as possible.
3. Loosen, but do not remove guard bracket screw until the bracket can be raised far
enough to access the blade screw. Lower guard will remain raised due to the position
of the guard bracket screw.
4. Depress the spindle lock button (Fig. 3) while carefully rotating the saw blade by hand
until the lock engages
5. Keeping the button depressed, use the other hand and
the wrench provided to loosen the blade screw. (Turn
clockwise, left-hand threads.)
6. Remove the blade screw, outer blade clamp, and
blade. The inner blade clamp may be left on the
spindle.
Installing a Blade
1. Unplug the saw.
2. With the arm raised, the lower guard held open and the
guard bracket, place the blade on the spindle against
the inner blade clamp with the teeth at the bottom of
the blade pointing toward the back of the saw.
3. Assemble the outer blade clamp onto the spindle.
4. Install the blade screw and, engaging the spindle lock,
tighten the screw firmly with wrench provided. (Turn
counterclockwise, left-hand threads.)
5. Return the guard bracket to its original position and
firmly tighten the guard bracket screw to hold bracket
in place.
WARNING:
• The guard bracket must be returned
to its original position and the
screw tightened before activating
the saw.
• Failure to do so may allow the guard
to contact the spinning saw blade
resulting in damage to the saw and
severe personal injury
you can download a manual at: http://www.dewalt.com/tools/machinery-miter-saws-dw713.aspx

You can order them at www.dewaltservicenet.com.
The DW746 and DW744 use the same guard assembly, if you're talking about the hinged guard over the blade.

there is a hold in the lower guard for the loop and the other end wraps around the guard slightly and there is a hole in the back of the upper guard. You can go to Milwaukeetool.com and download a breakdown for the tool Also when you have the blade off I would try using compressed air to clean the area and spray some lubricant on the hub to lubricate. The guard should "snap" back when done sawing. Let me know if you need more help

I am assuming that you have some type circular saw?
Most popular saws use a spring to return the guard,with the saw unplugged raise the guard and see if the spring is there(you may need to take off the blade) if it is not there,replace with proper spring.one end of the spring will hook onto the fixed 1/2 of the guard the other to the front of the moving guard(consult manual if possible).once this is done insure that the guard mover freely and is not in the way of the blade.Replace the blade in proper direction check guard again for proper travel,make sure everything has been re-tightened .
If the spring is there check for material build-up or debris that is causing
guard not to move,remove blade clean debris or obstruction,replace blade and check for proper operation.Also visually inspect where the moving guard is attached to the saw for any unusual marks or wear this could be a sign that some type of unsafe situation exists,if this happens refer to a pro to fix or buy new never use a saw without a properly working guard,it took 141 stitches to repair my friends leg.

OK first raise the cutting head. Loosen the screw that holds the guard in place and move out of the way. Find the spindle lock on the right hand side of the gearcase and turn blade by hand (UNPLUG SAW FIRST) until it locks. With the wrench supplied with saw put it on the blade bolt and turn it clockwise to loosen, it has left hand threads, remove outer flange and blade. Let me know it you need any more help

here ya go Bob hope it helps
http://www.ereplacementparts.com/makita-ls1030n-miter-saw-parts-c-97_98_99_321.html