Bearing, Chain, and sprocket replacement































Top chain case covers and floor plate removed to show what's inside. The drive chain from the left side of the machine (right side of photo) has already been removed.


 Tightening bolts on the Idler arm assembly. New front Axle Sprocket Weldment & axle have already been installed.


Cluster Sprocket Weldment







Both axles & idler arm assembly removed. Left side of machine.






Old chain being removed. It is standard 80H chain 10 feet long.











Video of trying to install the rear inner bearing race with a slide hammer. It didn't work, couldn't get the race started straight. 













Old chain, race, bearings, and seals. Pretty poor condition.






Bearing race driver set. Used to install the new races.

New idler am assembly in place (left side of machine).
Don't forget to put the shims in. It must be in perfect line with the other sprockets or chain wear will occur. 

28 comments:

  1. Wow what a great, informative site. I have searched high & low for something like this! I really like the detail in the pictures, it helps knowing what things are supposed look like.

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  2. thanks great info and pics really helpful

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  3. That was helpful seeing the actual parts and procedure, but I was curious if you had to get all your main parts from the MUSTANG dealer or is there another source for CHAIN, sprocket, bearings,etc. Dealer loves to charge full price, ,just wandering if there was alternative choice as it can get expensive when you gotta change everything.
    thanks
    Philip

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    Replies
    1. I think the only part I had to get from the Mustang dealer was the chain tightener.

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  4. Where can one get some of the larger expensive parts other than dealer? Chain, Sprocket, main bearings,etc. Can you give me part number and place to order large chain? about how much is that?
    thanks

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  5. Where can one get some of the expensive parts other than the dealer, for example, chain, sprockets. Is there a generic part number for large chain? that can be used to order thru a chain dealer?
    thanks
    Phillip

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  6. I have a older 442 mustang , I'm adjusting my drive chains and cannot find any info on how much deflection you should. any clue??

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  7. What size driver did u use for the race

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    Replies
    1. I had to have a local machine shop make a custom one. I took a race there so they would make the proper size.

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  8. Hi I know this is a old post but I can not find any info on how to remove the cluster sprocket I’m working on a mustang 2040 Do you just drive the shaft out and hitting on this thing pretty good and I can not get my hands in the side covers to see if there are clips holding it in but if there are clips on the shaft I see know way of trying to remove them because there is no access please help in explaining how you removed yours this is the only post I found online

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  9. Can you explain how you removed the cluster gear. I’m working on a mustang 2040 and there is just no access to see what I’m doing I can barely get my hand in there to see if clips are holding the sharft in and I have been hitting this thing pretty good to try and drive it out but something is holding me up please help

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    Replies
    1. Did you ever figure out how to remove the Cluster Sprocket on your 940? I am not having any luck.

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  10. Did you change the bearing in the drive motor sproket?

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  11. Did you replace the bearing in the drive motor soroket? How dis you disassemble?

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  12. Thank you for all of the great pictures. I am working on the left side of my 940 at the moment. Idler bearing went bad and it let things become misaligned and inner chain came off front sprocket.

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  13. Hi great project.

    I'm currently restoring my 940e due to an engine fire, and are also replacing the bearings as you. Messy project.

    BTW can you help to take a picture of the engine oli stick with a measurement tape next to it. In the rebuild I lost mine and need to replace it.
    Br db

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  14. Great pictures,really shows the inner workings and how to disassemble. Did you count the number of links of the 80hk chain you will need to re-install?

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  15. Can anyone tell me what the pin on the right hand side of the machine that’s just forwarded of the oil level hole in the chain case ?

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  16. Can you tell me the dimensions of the axle seal? I'm thinking of 2.375 on the ID and 3.35 on the OD. Also, do you know if the race is supposed to be 3.22 (JLM104910) on the OD, or 3.25 (LM104911)?

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  17. Anybody know where to get replacement front sprocket, 13 spline .bed inner bearing destroyed ours !

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  18. Our mustang had 80HK chain

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  19. Just finished replacing the left rear bearings , very hard to reach ! Was thinking of making some access ports on the outside , one above the axle and one larger between the axles . changed the gasket on the round access port at the back , liked to never get the forward bottom nut started , arms to large from hay , farm work and logging i guess .

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  20. Great detail! Very helpful!

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  21. I have a rear out axle bearing that has disintegrated from one of the photos there looks to be a round access / inspection cover on the inside of the chassis ?
    Can anyone confirm this .
    Looking in from the top I can only "just see" the axle nut & sproket I need to remove let alone try get my hand in there .........

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  22. what is the seal dimensionsfor the hubs

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  23. We're do I buy the hole left hand drive chain and Sprockets

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