Dulb_D
Active Member
Picked up a 15t pinion for my, now monsterized, Senton 3S. Watched as many videos as I could find that were relevant enough and thought this would be a breeze. As a newbie myself, not a pro, here are the issues I ran into that maybe aren't discussed enough on these YouTube How-To videos:
1.) The 2019 Senton 3S motor mount assembly is reportedly easy to remove, if your experience is like mine you are going to need to pry it out with a flat-tip screwdriver and worry about breaking it as well as sacrifice some knuckle skin. It is dovetailed to the chassis and I suppose if it's perfectly clean it may slide out easy but if you used it once expect it to put up a fight.
2.) Once you get that out, before you remove a single screw or bolt make sure you have an appropriately sized allen driver, do not use the short allen keys they include in the kit, you will strip screws - especially the pinion grub screw. Also before you turn the screws with any force make sure the tip fits snuggly into the screw head. Not all 2mm allen drivers are made to the same level of tolerance and if you're driver wiggles even just a tiny bit, you may strip the screw. These things are locked in there and going to take a little force to loosen which brings me to my biggest issue and gripe...
3.) Arrma seems to have used red threadlock on many of these motor mount screws, even ones that screw into plastic... Red=you don't intend to remove, Blue=you may want to be able to remove some day. I don't think there is any need to use red loctite on these cars at all even though I've seen some recommending that - I don't think that's wise at all, and not sure what Arrma was thinking if they in fact are using it in these "hobby grade" vehicles that are supposed to be repaired, not outright replaced. The screws seam to be overly tight or locked. I know you can use heat to loosed the threadlock but you shouldn't have to.
I eventually got my pinion in and put the motor mount assembly back together and am waiting for the blue loctite to set up before trying out the new pinion.
1.) The 2019 Senton 3S motor mount assembly is reportedly easy to remove, if your experience is like mine you are going to need to pry it out with a flat-tip screwdriver and worry about breaking it as well as sacrifice some knuckle skin. It is dovetailed to the chassis and I suppose if it's perfectly clean it may slide out easy but if you used it once expect it to put up a fight.
2.) Once you get that out, before you remove a single screw or bolt make sure you have an appropriately sized allen driver, do not use the short allen keys they include in the kit, you will strip screws - especially the pinion grub screw. Also before you turn the screws with any force make sure the tip fits snuggly into the screw head. Not all 2mm allen drivers are made to the same level of tolerance and if you're driver wiggles even just a tiny bit, you may strip the screw. These things are locked in there and going to take a little force to loosen which brings me to my biggest issue and gripe...
3.) Arrma seems to have used red threadlock on many of these motor mount screws, even ones that screw into plastic... Red=you don't intend to remove, Blue=you may want to be able to remove some day. I don't think there is any need to use red loctite on these cars at all even though I've seen some recommending that - I don't think that's wise at all, and not sure what Arrma was thinking if they in fact are using it in these "hobby grade" vehicles that are supposed to be repaired, not outright replaced. The screws seam to be overly tight or locked. I know you can use heat to loosed the threadlock but you shouldn't have to.
I eventually got my pinion in and put the motor mount assembly back together and am waiting for the blue loctite to set up before trying out the new pinion.