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Install spring on 345 guard - Saws

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As you are looking at the blade side of the saw, the spring hooks through a hole at about three o'clock on the lower guard. It then wraps around the bottom of the guard clockwise and attaches to the upper guard. The hole on the upperguard should be somewhere around ten to twelve o'clock. Move the lower guard to check for binding and full return to the safe position.

Posted on Feb 21, 2012

Testimonial: "Do you have a picture...How do you get spring around bottom of guard? "

  • Repair Ahjoshe Feb 22, 2012

    It doesn't go around the very bottom of the guard, it just wraps around the bottom of the hub flange in the center of the guard. The center hole of the guard should turn freely on the saw so it doesn't need much for the spring to pull it back around the saw.

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Posted on Jan 02, 2017

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B & D #3051 worm drive saw: How do I access the return spring for blade guard?


Link,
Usually you will have to remove the blade guard to get access to that. There is usually a rubber stop with a screw going through it that you will have to remove, and a spiral spring clip on the inside of the hub of the blade guard that will also have to be removed and then you should be able to lift the blade guard off the saw. The spring will hook around the blade guard and the other end will hook to the saw housing. Hope this helps!

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Replacing brake band on Husqvarna 357/359/340/345/350/346/445 and many others


Before attempting to repair any chain brake, eye protection should always be worn, these machines all have an out board chain brake, known as a knee link brake due to its actuating mechanism, start by makeing sure the brake is off, by pulling the brake handle fully back to the top handle, now remove the bar securing nuts, remove the brake/side cover, the hand guard stays with the saw, so the cover is quite difficult to hold when removing the spring, so take two 8 mm bolts, clamp the hex heads in a vice, spacing them out the same as the fixing holes in the brake, now fit the brake /cover band up onto the up standing bolts, use the two bar nuts to secure the brake to the bolts, now insert special tool part no. 502522202 into the actuating quadrant and turn to activate the brake ( this will remove much of the spring tention ) if you do not have the tool you can remove the hand guard from the saw and use that, or a sturdy pair of long nose pliers, now remove the cross head screws from the spring cover, edge the back of the spring up enough to insert a suitable screw driver into the end, lever the spring up and onto the screw driver shaft ( this will stop it flying out ) remove the c clip securing the actuating quadrant to the brake cover, gently lever out the roll pin in the anchor end of the band, the band will now lift out of the cover, remove the single cross head screw securing the knee link mechanism to the band. Refit the new band into the knee link and re fit the screw, re fit the quadrant onto the post in the cover and re fit the e clip, press the anchor end of the band back into the cover, insert the spring back onto the knee link spigot, compress the spring and push it back into the cover, the best way to compress the spring is to use a good pair of long nose pliers, push the closed jaws into the end of the spring ( this will stop the spring flying out ) now push the pliers in to compress the spring against the knee link, and back into the cover, refit the spring cover screws, you now need to load the brake before it can be put back onto the saw, use the special tool, or the removed hand guard to do this, it will take a fair amount of force to re load the brake, once loaded re fit to the saw.

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1 Answer

Toro LX468- Was replacing belt and a small (2") spring came loose from I think the PTO ? Also the PTO clutch should be in what position to permit belt guard installation? Does the guard go into the gr


Yess it goes into the groove to prevent clutch housing from turning and the position of the housing when install the retaining bolts.

The spring into the hole on the clutch housing and other end goes somewhere on the frame. It is being used as a damper spring.

The below should be correct.

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1 Answer

50s 1


Remove the blade, and you will normally see a hole in a lug on the inner ring of the guard and a slot with a bar across it on the upper inside of the fixed guard. Either end of the spring will hook through these. Sometimes (normally on DeWalt) the springs will be attached with a small self tapping screw with a washer at either end.

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1 Answer

Makita


I don't have this particular model in my shop right now but almost all circular saws work like this. From the blade side of the saw, the spring attaches to a hole in the blade guard usually around the two to three o'clock position. With the blade guard correctly positioned on the saw, wrap the spring clockwise around the bottom of the hub and back up the nine o'clock side. There is another hole or tab inside the top of the upper blade guard somewhere around the twelve to two o'clock position. Hook the end of the spring there and test the guard for free movement throughout it's range of motion.

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1 Answer

Chain saw brake on husquvarna model 41


To replace the brake band do as follows, remove the bar nuts and take the brake away from the saw, engae the brake to remove as much tention off the internall spring by pushing the hand guard fully forward, remove the allen screw securing the hand guard, do not remove the e clip and pin from the hand guard, tap out the pivot collers and remove the hand guard, remove the cross head screws securing the spring cover, carefully remove the spring from under neath, tap out the silver pivot pin from the knee link activating arm, use a puch from the other side of the brake to remove the roll pin securing the other end of the band, with the band out remove the screw securing the band to the knee link, install the knee link to a new brake band, re fit the roll pin in the band and re fit into the cover, insert the spring, this will have to be compressed to get it back in, re fit the spring cover, you need now to load the brake, fit the hand guard onto the cover, insert a conical puch through the hand guard and cover to enable you to pivot the hand guard back and load the brake, now fit the hand guard properly onto the cover and re fit the collors and screws.

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1 Answer

Repair spring to lower guard to spring back on dewalt 18v dc390 saw


You may be able to salvage the torsion spring that is there. Sometimes the end will break off and you can bend yourself a new end and just stick it back into the retaining hole in the housing or guard. There may be damage to the guard which will not allow you to just bend the spring to make a new joint. Either way, you need to know what you are dealing with. First remove the blade if you haven't done so already. Then remove the bumper (rubber piece) that stops the guard from returning too far. Next you will need a pick or a small flat head screwdriver. Look around the hub and you will notice a retaining ring. You will have to use the pick or screwdriver to get the ring started. Look for a little tab around the perimeter of the hub. You will have to work that tab out and make sure you keep your pick or screwdriver under it. Then work it around and off the hub. Then you can remove the guard from the hub. The spring is located under the guard and is a torsion spring. Look for damage to the guard and the housing as well as the spring. If there is any question to the integrity of the guard you should replace it. The part number for the torsion spring is 612517-00 ($1.50), the retaining ring is 150383-00 ($1.50) just in case you break it, and the guard number is 611925-00 ($6). If you have any questions please post back.

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1 Answer

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1 Answer

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