Chain bar brake handle - Husqvarna 450 e-series 18" Chain Saw

First, stop your engine. Check to make sure that the chain brake isn't engaged. The chain brake can activate automatically by a sudden movement or impact. You can disengage the chain brake by pulling the chain brake hand guard back against the front handle and releasing slowly. If the chain brake is disengaged and the chain does not turn; turn off the saw, then check the drive links on the chain, the bar groove and the sprocket nose on the bar. A burr on the drive links will bind the chain in the bar. If the bar has been pinched, the chain will not pass freely through the groove. If a sliver of wood has gotten into the sprocket nose, it will not turn at all. Also, look at the drive sprocket on the saw itself to see if it has a groove worn into it. A drive sprocket with a groove worn into it will damage the chain.

Like this or pretty close.

1. Cock brake while expanding chain brake binder by pulling brake handle towards left-hand (wrap-around) handle grip, hard, until it locks in place.



2. Loosen 2 brake-asssembly-and- bar retaining nuts but do not remove yet.



3. Unscrew (turn CCW) bar adjustment screw on front face of unit in order to shorten bar and slacken saw chain.



4. Slip chain off bar over bar tip and towards inward side of bar.



5. Remove two nuts loosened in step 2 and pull brake assembly and bar straight out and off bar mounting studs.



6. While rotating clutch/brake-drum, maneuver saw chain off sprocket and around drum perimeter to remove from saw.



7. Repeat/reverse steps 6 thru 1 in that order to reassemble.

1. What is the make and model of the saw?
2. Does it make any sound when you push the chainbrake handle towards the front (the bar and chain direction)?
3. The idea, and the way it works is that as the bar and chain get jerked upwards towards your face, your left wrist catches the chainbrake handle and pushes it forward thus engaging the chainbrake.

Have you got chain brake on

Hi, the chain brake has most likely been activated while removing the cover. Place the cover in a vise where the bar nuts tighten up to and pull the chain brake lever backwards towards where the handle bar would be. It should click back and stay back. Hope this helps, regards Phil.

It can be a little tricky!

If you are referring to chain break band

Tools you will need:
1/2 Socket (to remove bar nuts)
T25(torq) or you can use a Flathead screw driver but is a little harder.

Remove 2 bar nuts,Clutch cover,bar,chain, 2 screws on black bar handle right behind clutch cover(this is needed because there is a hidden screw there for the chain break) You will need a new chain brake (my guess is that it is part # 530071893 aprox $15) but you will want to verify that with your model number.

You should see the chain break assembly, 3 - T25 screws are visible after the clutch cover is removed(note sometimes you have to clean saw dust to make screw head visible) the other T25 screw is hidden under the black bar handle. Once you remove all 4 screws on the chain brake you will be able to pull it off.

Installing the new one is the tricky part because if it is set(or break is on) you will have a hard time putting it on.One of the easiest ways is to focus on it near the muffler you will see that a metal 3 pronged gear fits into the plastic part of the chain break handle.and if the band is too tight to fit over the clutch drum you will have to carefully reset it by applying pressure onto the area that has the 3 pronged gear and chain break handle make sure that the handle is pushed forward all the way while you apply pressure then slowly pull chain break handle back till you hear a "snap" this resets the chain brake spring and the band should now fit over the clutch drum.Now, proceed with putting back together 4 chain brake assembly screws,2 handle screws,and bar,chain,clutch cover,and 2 bar nuts.

Please note it is important that you apply quite a bit of pressure onto chain break area where metal (3 pronged) gear fits into handle while resetting or when you reset it the metal part can cut into and damage the plastic piece in the chain break handle.

You can see a breakdown here: http://www.searspartsdirect.com/partsdirect/part-model/Poulan-Parts/Chainsaw-Parts/Model-P4018WT/1324/1503220/P0506041/00002?blt=06&prst=0&shdMod=P4018WT

Hope this helps!

You'll definitely have to unlock the chain brake to get the cover back on. You should be able to unlock it by pushing the chain brake handle forward, toward the bar and chain when mounted on the saw.

Sounds like the blade brake is engaged. You should be able to pull the blade brake handle, located on top of the saw, in front of the top handle, back towards the handle to disengage it. You can find replacement bars, chains & sprockets for your saw at Partsbuggy.com.