This is a discussion on Servo Comp Motor (Only) Replacement within the Grizzly Tech Tips forums, part of the Grizzly Forums category; I asked a question a while ago if any one knew what would be the least expensive way to repair or replace a 2005 660 ...
I asked a question a while ago if any one knew what would be the least expensive way to repair or replace a 2005 660 Grizzly servo comp motor unit. I found a seller on Ebay that sells the small DC 3 Volt servo motor that is inside the assembly. Yamaha would only sell me the whole unit for about 300 bucks, I got the motor only for 50 bucks and free shipping.
There are 3-8mm torx head bolts that hold the unit in place. The bottom bolt needs a tamper proof bit to remove it. Once you take the 3 bolts out and remove the 2 connectors, place the assembly on a bench. There are more torx screws to remove to seperate the case. Do not remove the external drive gear. Seperate the case and take out the 2 phillips srews that hold the motor on, now remove the motor and gear. Do not lose the little plastic piece on the end of the gear. Slide gear off motor shaft and install new one in reverse.
All I had was a burnt motor, so the fix was quite cheap. There is also a procedure how to sync the gears and insure 2wd to 4wd works. If anyone wants to know where I got the motor and how to put it in let me know.
Finally a success story
Last edited by knowlimits; 08-24-2009 at 07:36 AM..
The seller on ebay sometimes has them up for sale but not always. Contact him thru ebay to get a 3 volt dc motor for 50 bucks: eBay Member: engineered_products_usa
Go to page 7-13 to see how to install the servo motor comp unit with the new motor inside. Make sure when you swap the motor not to lose the baby plastic guide off the end of the plastic worm gear. Also do not take off the external pinion gear when seperating the motor comp case.
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