Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Can the chain sproket on top of the opener be replaced and what would have caused it break?

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Yes it can be replaced. The part number is 41C4220A. The common reason for this to break is a heavy door that wears away the bearing. Might be time for new door springs also.

Posted on Jul 18, 2009

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Posted on Jan 02, 2017

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Greenfield mower chain tension


take chain off -- lay on floor --pull taught end to end push together --if it flexes more that one quarter of a inch --chain is worn --replace chain--also see how deep chain sits on sproket--- if sits too deep sprokets are wore and need replacing

Dec 27, 2013 | Garden

2 Answers

Chain is sticking to back sprocket and making my bike **** when i accelerate


Sounds like the chain is worn out and needs replacing if there is no more adjustment!

A good idea is to replace the sprockets at the same time, as they wear along with the chain, and will cause a new chain to wear out sooner.

Nov 19, 2013 | Suzuki RF 600 R Motorcycles

2 Answers

Knocking noise of chain in honda dream yuga bike when accelerating after shifting the gears. i have tightened the chain but still it happens.


That knocking noise could be that the teeth on your main drive are worn out and chain is jumping them on acceleration.Pull th primary cover and check the drive gear for chain on motor sprocket.Replace it if worn to that point.

Oct 02, 2013 | Honda Motorcycles

1 Answer

I have an old snowblower (ca. 1980's?) that runs like a top - the only problem is that the auger drive chain pops off the rear (smaller) sprocket in heavy snow, no matter how tightly (or loosely)


First remove the chain--- lay it flat on the floor --streched lengthwaze . grab either end and pull out and push back--- if chains length moves more than a quarter of a inch ---replace the chain. Next inspect the sprokets, if they are worn inward on the side they will let the chain drop on too far making the chain jump and rattel as it runs and this will throw the chain. Next inspect allignment of each spoket to the next sprokets with belt drive the belt will flex and this is not critical with chain drive this will load one side of each spoket causing the chain to jump off.

Apr 21, 2013 | Garden

1 Answer

Popping noise coming from front sprocket when wheel is turned on 01 suzuki gsxr 600


hi it sounds like your front sproket is really worn and hooked when you turn the chain its not releasing the links smoothly ,replace it with a new one and check the condition of your chain it may be worth replacing a complete chain and sproket set as running a bike with a worn front sproket could lead to a back wheel locking up at speed if the chain jams

Feb 22, 2011 | 2001 Suzuki GSX-R 600

1 Answer

Having problems getting the door to close.....The door starts to close then then it stops like it hit something. i can hold the button on the wall down and i can get it to close. It doesnt seem to have a...


Check sproket for broken tooth on sproket Happens during winter in midwest garage door cheapos use a plastic sproket for wind up and down Mine in particlar sears cheapo broke a tooth and chugged gort slack and sometimes stopped but down ok wieght of door kept slack out UP sometimes chugged and caused slack then stopped

you can slightly adjust the chain to be tighter with the adjustment screws built into chain See them? solid bullet like links with adjustment screw built in

Jun 11, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Cant find sproket number 76695


Super Deluxe ? Do you mean a Poulan chain saw. Check here they handle all brands of chain saw parts.
By the way Poulan is owned by Husquvana, which is owned by Electrolux.
sales@mfgsupply.com

Feb 04, 2010 | Garden

1 Answer

I need to replace the chain sproket on my Hsuqvarna 345e chain sa


It has an out board clutch, please view this it is essentially the same.
R² Drive Link Outboard Clutch by Drivelink.blogspot.com
http://www.youtube.com/watch?v=cdqkIuVNUQc
  1. Check the IPL for your saw to see if any special tools are needed.
  2. There are metal piston stops available, when square (almost never) with the piston top these work well, if not square they have been known to punch through the piston. I suggest a length of starter cord or nylon rope be used instead of the piston stop (retain 6" ± so you can remove it). Make sure the piston is near the top of the cylinder before feeding the cord or it can fall through the exhaust port and damage the piston as it rises.
  3. Everyone I have ever removed had a left handed thread (tighten it to loosen it).
    Let us know how it worked for you.
IPL and operator's manual download
HusqvarnaUSA.com
http://www.husqvarna.com/us/homeowner/support/download-manuals/
Enter the 3 digit model number (no XPs, Es, just the numbers)
Serial number decode – useful when downloading IPLs and Manuals
06 1500198
06 = year produced – 2006 (single digit before 2000)
15 = week produced - March
00198 = 198th unit Husky produced that week

You may find detail B beneficial. HTH
Lou

Dec 17, 2009 | Husqvarna Forest & Garden No.967012396 345...

1 Answer

I hear a cluttering noise coming from my sprocket. I believe the front is worn pretty badly. Does anyone know how to get the front sprocket cover off? I think the clutch cable may be the problem but I...


The front sproket normally last for a very long time so I am pretty sure it is not the cause of this problem.Try to adjust the chain tension and this may solve this problem.Also if the rear sproket are worn out or it could well be the chain that needs replacing.Hope this gives you an idea.

Nov 13, 2009 | 1991 Suzuki GSF 400 Bandit

3 Answers

Need to replace timing chain on 2005 cavalier


I'm doing this myself, and there are some annoyances. Yes, a service manual is good, however, I consulted 2 manuals and got two different answers. Here is the real deal for the 1996 2.2 vin 4 cavalier.

Remove the right tire and platic sheilds. Remove the tensioner pully, (2 bolts).

Remove the harmonic balencer on the crank shaft, 3 bolts first then the center.

Use a pull hammer with correct thread to pull off the "crankshaft thing" on the end of the crank shaft. Be sure to pull it off evenly. I had to find a bolt with the same threads, cut that off, and tap a fitting for my **** hammer. It's on there good.

Remove 7 (8mm) bolts from around the chain cover. Remove the 2 (10mm) bolts from under the cover. Those two studs also have to come out with a small inner tourqe socket. These are very very easy to strip, be careful. The cover is now free.

It is sealed on tight. There are a couple good places to get a bite on the rear facing edge. You will also have to work from the top and bottom to get it free. It pulls strait out, it is positioned by pins. Be patient, that cover will break.

There is silicon that seals the bottom of the cover. Clean that all off with a scraper and wire brush. Pull off and clean where the gasket seats all around the cover. Clean the cover. Replace the gasket and the outer oil seal that goes around the crank shaft. The only way to get that seal out is to break it. Press the new one in with a vice, do it evenly and slowly.

I've found a good method to get the cam shaft sproket off.... There are 3 slots and a hole. Rotate the cam sproket clockwise till you get the hole to about 9o'clock. Put drill bit or short piece of hard metal (something that won't bend) in that hole and apply some pressure while you rotate another 10 degrees or so. The bit will drop into a hole. Now rotate counter-clockwise and the bit will bind the sproket so you can remove the bolt. Nice huh? I get it unbound by putting a screwdriver between teeth and prying against the crank shaft. Use your imagination.

The timing **** is retarded. And I still havn't found a deffinate answer for everything. The crank shaft makes two rotations for every one that the cam makes. The first crank shaft rotation is the compression stroke, the second is the power stroke. I don't know how to tell the difference.

To get the sprokets aligned, re-install the cam sproket, don't worry about getting it tight. Rotate it clockwise until the hole in the sproket lines up with the ear on the chain tensioner. Now, bind the gear right in that spot and remove it. Now, take that "crankshaft thingy" and push it on by hand as far as you can. Notice the key, and dot on one of teeth. Put the bolts partially in the thingy and rotate it by using a bar or screwdriver between the bolts. Move that sproket until the dot on the tooth lines up with the ear on the chain adjustor. The key will point directly up. Good job. Tap that thingy off the shaft now.

Compress the chain adjustor and put a pin through it. With the cam sproket removed, put the chain on it. Work the chain onto the crankshaft sproket. Slide the cam sproket onto the camshaft. Easier said than done, but it is possible. If you are having a hell of time, use a mirror and check that you are lining it up properly with the pin/key in the crankshaft. I found that leaving a little slack at the top, as opposed to the bottom helps. FYI, when i say little, i mean it. There is very very little slack, but the chain does buckle slightly.

Remember me saying that I have no idea how to tell between power and compression stroke. Now you will hate me. To get mine right, I had to tighten the cam sproket then replace my spark plugs and attempt to start to start the car. I guessed mine right the first time and it ran fine. However, if it ran rough or not at all. I would have had to remove the cam sproket again, remove the chain and rotate the crankshaft sproket one full turn.

When you put this all back together, use plenty of slicon on the bottom of the chain cover. Re-assembly is a snap, or at least is was for me.


Jul 28, 2008 | 1998 Chevrolet Cavalier

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