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

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The chain has come off the sprocket.

How do I get it back on?

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The gear/sprocket assembly needs to be replaced with part # 41C4220A. The top bushing is worn out that is why the chain fell off.

Posted on Jan 01, 2009

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Husqvarna 50 chain keeps coming off


Are you adjusting the chain tension correctly?? Make sure the bar in installed correctly with the tension adjustment pin in the appropriate hole. Elevate the tip of the guide bar while adjusting the chain adjustment screw until the chain is snug but not tight. Then tighten the bar bolts without lowering the tip of the bar. Also ensure the drive links are engaging the sprocket correctly.

If the chain is adjusted correctly and the problem still exists, remove the sprocket side cover, bar and chain and inspect the sprocket for extreme wear. Once the sprocket is worn excessively it won't want to engage the drive links of the chain correctly which could be the source of the problem. If so, replace both the sprocket and the chain because the excess wear of the sprocket could have damaged the drive links of the chain and putting an old worn chain back on with a new sprocket will cause the new sprocket to begin wearing prematurely.

Apr 12, 2015 | Husqvarna Garden

1 Answer

Tryed to put on a chain cant get it back togather right


Completely loosen the chain tensioner. When looking at the saw from the sprocket side(bar to the right) the chain WILL travel clockwise. Fit the chain on the bar.(ensure that the chain travels in collation with the sprocket at the end of the bar if equipped). When looking at the saw from the sprocket side(bar to the right) the chain WILL travel clockwise. With the chain still in the bar, fit the 5 or so links in the sprocket on the powerhead, engage the bar with the bar nuts, then lastly engage the chain in the tensioner. Place the sprocket cover and nuts. Tighten nuts then loosen about .5 turn. Adjust chain tensioner. Retighten nuts. See that tightening the nuts made your chain tighter, loosen nuts readjust chain, tighten nuts. With gloves on and the chain brake disengaged please ensure the chain travels around the bar. Put on your chaps and start cutting.

Sep 11, 2011 | Husqvarna , No.455 Rancher, 20" Gas -...

1 Answer

Rear sprocket slips when chain is on the smallest sprockets. when I shift to the two largest sprockets on the back wheel, it peddels or ingages fine


Sprockets are all connected and turn together as a unit. The chain could be skipping over the teeth on individual sprockets.

I suspect severe chain and sprocket wear.

http://sheldonbrown.com/chains.html

Jul 10, 2011 | Cycling

2 Answers

2001 chev cavalier timming chain diagram


Timing Chain and Gears REMOVAL & INSTALLATION 2.2L Engine Fig. 1: The timing marks on the sprockets should be in alignment. If not, turn the crankshaft until the marks are aligned 91113p63.jpg
Fig. 2: The timing chain tensioner is retained by a Torx head bolt (1) and a regular hex head bolt (2) 91113p58.jpg
Fig. 3: Unfasten the camshaft sprocket bolt 91113p59.jpg
Fig. 4: Remove the camshaft sprocket and the timing chain at the same time . . . 91113p60.jpg
Fig. 5: . . . then remove the tensioner assembly 91113p61.jpg
Fig. 6: Compress the tensioner spring and insert a cotter pin or nail in the hole provided to hold the tensioner in position 91113p62.jpg
  1. Disconnect the negative battery cable.
  2. Remove the front cover as previously detailed.
  3. Place the No. 1 piston at TDC of the compression stroke so that the marks on the camshaft and crankshaft sprockets are in alignment (see illustration).
  4. Loosen the timing chain tensioner nut as far as possible without actually removing it.
  5. Remove the camshaft sprocket bolts and remove the sprocket and chain together. If the sprocket does not slide from the camshaft easily, a light blow with a soft mallet at the lower edge of the sprocket will dislodge it.
  6. Using a suitable gear puller, remove the crankshaft sprocket. To install:
  7. Press the crankshaft sprocket back onto the crankshaft.
  8. Install the timing chain over the camshaft sprocket and then around the crankshaft sprocket. Make sure that the marks on the two sprockets are in alignment (see illustration). Lubricate the thrust surface with Molykote® or its equivalent.
  9. Align the dowel in the camshaft with the dowel hole in the sprocket and then install the sprocket onto the camshaft. Use the mounting bolts to draw the sprocket onto the camshaft and then tighten to 66-68 ft. lbs. (91-95 Nm).
  10. Lubricate the timing chain with clean engine oil. Tighten the chain tensioner.
  11. Installation of the remaining components is in the reverse order of removal. Fig. 7: Exploded view of the timing chain and sprockets - 2.2L OHV engine 87953107.gif

Nov 11, 2010 | Chevrolet Cavalier Cars & Trucks

1 Answer

How do you set the timing chain for a 2000 cavalier?


Timing Chain and Gears REMOVAL & INSTALLATION 2.2L Engine Fig. 1: The timing marks on the sprockets should be in alignment. If not, turn the crankshaft until the marks are aligned 91113p63.jpg
Fig. 2: The timing chain tensioner is retained by a Torx head bolt (1) and a regular hex head bolt (2) 91113p58.jpg
Fig. 3: Unfasten the camshaft sprocket bolt 91113p59.jpg
Fig. 4: Remove the camshaft sprocket and the timing chain at the same time . . . 91113p60.jpg
Fig. 5: . . . then remove the tensioner assembly 91113p61.jpg
Fig. 6: Compress the tensioner spring and insert a cotter pin or nail in the hole provided to hold the tensioner in position 91113p62.jpg
  1. Disconnect the negative battery cable.
  2. Remove the front cover as previously detailed.
  3. Place the No. 1 piston at TDC of the compression stroke so that the marks on the camshaft and crankshaft sprockets are in alignment (see illustration).
  4. Loosen the timing chain tensioner nut as far as possible without actually removing it.
  5. Remove the camshaft sprocket bolts and remove the sprocket and chain together. If the sprocket does not slide from the camshaft easily, a light blow with a soft mallet at the lower edge of the sprocket will dislodge it.
  6. Using a suitable gear puller, remove the crankshaft sprocket. To install:
  7. Press the crankshaft sprocket back onto the crankshaft.
  8. Install the timing chain over the camshaft sprocket and then around the crankshaft sprocket. Make sure that the marks on the two sprockets are in alignment (see illustration). Lubricate the thrust surface with Molykote® or its equivalent.
  9. Align the dowel in the camshaft with the dowel hole in the sprocket and then install the sprocket onto the camshaft. Use the mounting bolts to draw the sprocket onto the camshaft and then tighten to 66-68 ft. lbs. (91-95 Nm).
  10. Lubricate the timing chain with clean engine oil. Tighten the chain tensioner.
  11. Installation of the remaining components is in the reverse order of removal. Fig. 7: Exploded view of the timing chain and sprockets - 2.2L OHV engine 87953107.gif
prev.gif next.gif

Oct 03, 2010 | Mr Gasket Timing Cover Chevrolet El Camino...

1 Answer

1999 Ford Expedition 5.4L Timing chain setup


.
  1. Remove the engine front cover. For additional information, refer to Engine Front Cover in this section.
  1. Remove the crankshaft sensor ring from the crankshaft.
    a0044041.gif
  1. Rotate the crankshaft until the timing mark on the RH camshaft sprocket is approximately at the 11 o'clock position and the timing mark on the LH camshaft sprocket is approximately at the 12 o'clock position.
    a0049532.gif
  1. Using the special tool, position the crankshaft as shown.
    a0041102.gif
  1. Install the special tool.
    aa5423a.gif
  1. NOTE: LH shown; RH similar.
    Remove the two bolts, the timing chain tensioner and tensioner arm.
    aa5952a.gif
  1. Remove the LH and RH timing chains and the crankshaft sprockets.
    • Remove the special tool from the crankshaft.
    • Remove the timing chains from the camshaft sprockets.
    • Remove the right and left timing chains and the crankshaft sprocket from the crankshaft.
    a0029151.gif
  1. ani_caut.gif CAUTION: The bolts are different lengths and must be returned to their original location.
    NOTE: LH shown; RH similar.
    Remove the bolts and the timing chain guides.
    a0044040.gif
Installation
  1. ani_caut.gif CAUTION: Timing chain procedures must be followed exactly or damage to valves and pistons will result.
    ani_caut.gif CAUTION: Do not compress the ratchet assembly. This will damage the ratchet assembly.
    Compress the tensioner plunger, using an edge of a vise.
    da0605a.gif
  1. Using a small screwdriver or pick, push back and hold the ratchet mechanism.
    da0606a.gif
  1. While holding the ratchet mechanism, push the ratchet arm back into the tensioner housing.
    da0607a.gif
  1. Install a paper clip into the hole in the tensioner housing to hold the ratchet assembly and plunger in during installation.
    a26917a.gif
  1. Remove the tensioner from the vise.
  1. NOTE: There are 61 links in the timing chain.
    If the copper links are not visible, mark two links on one end and one link on the other end, and use as timing marks.
    a0038720.gif
  1. Install the timing chain guides.
    a0044063.gif
  1. Using the special tool, verify correct crankshaft position.
    • Remove the special tool.
    a0041102.gif
  1. NOTE: Crankshaft sprockets are identical. They can only be installed one way. Refer to the following illustration for correct crankshaft sprocket installation.
    If removed, install LH and RH crankshaft sprockets.
    a14824b.gif
  1. Install the LH timing chain onto the crankshaft sprocket, aligning the one copper (marked) link on the timing chain with the slot on the crankshaft sprocket.
    a0041197.gif
  1. Position the LH timing chain on the camshaft sprocket with the two copper (marked) chain links and the camshaft sprocket timing mark aligned.
    a0049191.gif
  1. Position the RH (outer) timing chain on the crankshaft sprocket, aligning the copper (marked) link with the timing mark on the sprocket.
    a0041196.gif
  1. Position the RH timing chain on the camshaft sprocket. Make sure the two copper (marked) links align with the camshaft sprocket timing mark.
    a0041104.gif
  1. NOTE: LH shown; RH similar.
    Position the tensioner arms and tensioners, and install the bolts.
    aa5952a.gif
  1. Remove the tensioner retaining clip.
    a26273a.gif
  1. As a post-check, verify correct alignment of all timing marks.
    a0041106.gif
  1. Remove the special tool.
    aa5423a.gif
  1. Position the crankshaft sensor ring on the crankshaft.
    a0044041.gif
  1. Install the engine front cover. For additional information, refer to Engine Front Cover in this section.


2010&c18=modelyear&c20=n310677&c35=wsm%2ctiming%20drive%20components%2csxj%2c303-01b%2cin-vehicle%20repair&s=1600x900&c=32&j=1.3&v=y&k=y&bw=1171&bh=582&ct=lan&hp=n&[aqe]

Apr 03, 2010 | 1999 Ford Expedition

1 Answer

Yamaha r125


Just remove the chain cover then bend the tab on the lockwasher away from the nut so you can then remove the nut. Install the new sprocket and put the assembly back together. Stock gearing is a 13 tooth front sprocket and 48 tooth rear sprocket. The stock chain is 112 links plus master link. The chain is DID 520D 112L. Please rate my answer. Thanks.
1c4e226.gif

Feb 15, 2010 | 2008 Yamaha YZF-R125

1 Answer

2008 wr 450 how do i split the chain do i need 2 gring a link down so i can push it out ?


Yes you do need to split the chain but I would have a real good look at the condition of your sprockets 1st.Obviously you have run out of adjustment on the chain but taking a link out might not be the answer.With the rear wheel lifted,spin the wheel back and forwards a few times.Now, at the rear of the rear sprocket,pull on one of the chain links.Pull it away from the sprocket.If you can lift it away from the sprocket about 1/2 a sprocket tooth,both chain and sprockets need replacing.Just keep this in mind because a broken chain on 450's can do a lot of damage.Hope this helps

Jan 04, 2010 | 2005 Yamaha WR 450 F

2 Answers

Husqvarna chainsa;starts but chain sprocket doesnt


1) Chain brake is on. Pull the handle back towards the operator
2) Chain is too tight on bar
3) Debris caught inbetween bar and chain
4) Sprocket teeth are worn out

Nov 26, 2009 | Husqvarna Garden

1 Answer

Drive chain goes loose and tight on back wheel turn


No.That was the problem.The chain and the sprockets needed to be renewed.
When you will take, the rear sprocket's base, off the axle check it's bearing.Just put your finger in and turn it slowly to see if it "locks" instantly.It will be nice if you renew it now that you disassembling the chain drive system.

Jun 07, 2009 | 2002 Honda CBR 600 F(4)i

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