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Cox 4000. How can I remove the drive chain sprocket nut?

I’ve tried stillsons and spanner but wants to strip the thread

Posted by Jaab McDonald on


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  • Garden Master
  • 50,653 Answers

It may be a left hand thread. In normal motion, the drive should tighten the nut. This sometimes results in having a left hand thread. Bicycle pedals are a prime example, one is right hand and one is left hand. Give it a sharp tap CLOCKWISE.

Maintenance Manual if it is any use?


Posted on May 04, 2021


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SOURCE: I want to replace the drive sprocket on my Jonsered 451E chainsaw. I found a replacement sprocket, but don't have a manual to guide me through the process of removal. How do I keep the driveshaft from

the threads are left hand.i my self use a small butterfly air rachet to remove the nut. it spins fast enough to remove the nut.

Posted on May 12, 2009



  • 4565 Answers

SOURCE: Iam trying to replace the drive belt on my

The compensating sprocket nut is indeed right hand threads. It is torqued to 150-165 foot pounds of torque and usually has Locktite 271 (red) in it. A lot of mechanics go overboard with the Loctite. I've seen the entire inside of the nut "painted" with this stuff. The book calls for "two lines" of the stuff when putting the nut back on.

The easiest way to get the nut off is with a GOOD air wrench. I bought one of those Ingersol-Rand Titanium air wrenches. I've seen nuts on so tight that I've had to use a 3/4" air wrench to get them off. If you don't want to purchase an air wrench, load the bike on a trailer and take it to a tire store. Ask them to take the nut off for you. Usually they'll do it free but they may charge you a couple of dollars. It is worth a couple of dollars to get the nut off.

When putting the bike back together, the compensator sprocket torques to 150-165 ft lbs. of torque with two lines of 271 Loctite in it. The clutch hub nut torques 60-80 ft. lbs. left handed with one line of 271 Locktite. Make sure your torque wrench will torque in the left handed direction. Not all wrenches will.
Good Luck.

Posted on Sep 27, 2009

Testimonial: "Thank you very much i had already geussed that a rattle gun may do the job and sure enough it did i borrowed a 3/4 gun, and you were right it had a lo"


  • 3567 Answers

SOURCE: how do i remove the cam chain off the sprocket?

Remove the spark plug then put the piston at Top Dead Center compression. Look at the position of the timing marks on one side of the cam, parallel with the gasket surface. Remove the cam as you described.

Posted on Sep 30, 2009


  • 58 Answers

SOURCE: cant undo nut

No they are not left hand thead,normal r/h thread.
make sure chain is still on bike and front sproket and then try good rattle gun. if this does not work,put bike in gear and hold on rear brake and use long breaker bar, if still no good will need to heat front sproket nut with oxy set very carefully and rattle off with rattle gun while nut is hot

Posted on Jun 24, 2010


  • 4565 Answers

SOURCE: New Drive Sprockets for the late model FLHX

No, But they do offer a real nice chrome cover for them. Much less expensive than chrome plate. You can get one at your local Harley dealer or most any cycle shop can order you one from aftermarket supplies like Custom Chrome or Drag Specialties.

Posted on Jul 14, 2010

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Disconnect the battery. Drain the primary and remove the outer primay cover. Take the engine sprocket nut off, take the clutch adjuster out of the center of the clutch assembly and remove the mainshaft nut. This nut has LEFT HANDED THREADS. Remove the nut that holds the primary chain adjuster. Take the engine sprocket, clutch assembly, and primary chain off all together. Then, pull the rotor off the engine sprocket. It can be difficult to get off due to the strong magnets in it. Once off, there are four small bolts holding the stator on and two small screws holding the plug into the case. Installation is the reverse of disassembly. Torque the small Torx bolts that hold the stator on to 40 inch pounds. The engine sprocket nut torques to 150-165 foot pounds with one line of Loctite 271 heavy hold thread locker in it. The LEFT HANDED threaded mainshaft nut torques to 60-80 foot pounds with a single line of Loctite in it. You'll need a primary locking bar to keep the engine from turning while applying torque to the engine sprocket nut and the mainshaft nut.

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Mar 27, 2011 • Garden

Removal motorsprocket

I'm going to assume that you are talking about how to remove the engine sprocket from the sprocket shaft in the primary cover.

First, disconnect the battery and drain the primary. Look underneath the primary and loosen the locknut for the primary chain adjuster and loosen the primary chain by turning the screw outwards a few turns.

Then take the derby cover off the primary and remove the spring and locknut for the clutch adjustment. Remove the screws from around the primary and break it loose from the engine. Turn the clutch adjustment screw clockwise while removing the primary cover. Lay the primary cover aside.

Now, there is a plate in the center of the clutch assembly held in with a circlip. Remove the circlip. Now you'll need either an air wrench or a locking bar to lock the primary to prevent it from turning so you can get the clutch hub nut and the engine sprocket nut off. The engine nut has right hand threads and comes off normally. The clutch hub nut has LEFT HANDED THREADS and you must turn it in reverse. Once you get the two nuts off, you can usually grab the engine sprocket and the clutch assembly and lift those two units and the chain off at once. Sometimes you may need a puller to get the engine sprocket off but usually it just comes right off.

Installation is the reverse with the engine nut being torques to 150 foot pounds and the clutch hub nut torqued to 60 foot pounds left handed.

Good Luck


Sounds like the shifter pawl is broken. This is common in Sportsters. You'll have to pull your primary drive to repair it.

Disconnect your battery, drain the primary, loosen the primary chain adjuster and remove the outer primary cover. Take the engine sprocket nut loose. Remove the snap ring in the clutch assemble and remove the throwout bearing. Remove the mainshaft nut that holds the clutch assembly on. This nut has LEFT HANDED threads. Lift the engine sprocket, primary chain, and the clutch assembly out of the primary case.

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Good luck
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