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#1
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Shredded rear crown gear in B44!
Hello Chaps
Had a great days racing today. Unfortunately after the final, I noticed that that the teeth on the rear crown gear and pinion (within the rear gearbox) had shredded. This has happened once before. The slipper wasn't too tight, and the gears were shimmed as per manual. Anybody else had similar issues? Also on a side note for those using Lipo, have you benefitted from extra weight? If so, where about on the chassis have you placed it? Thanks.
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Losi Comp Crawler
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#2
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Had the same problem as you, it happened to me almos every two races. Tried everything, loose slipper, reshiming etc. At the end it was the gearbox, wich was default. Change it, maybe it is the same for you.
Cheers, |
#3
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I had the same problem on my car on both ends. I changed the gearbox housings but no luck, the problem was still there.
It appears that my car needs more shims than stock. I had to add 2 or 3 shims on the diff to stop lateral play and I don't have any breakage since. So shimmage is the way to go
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Schumacher KF | K1 Aero | RWS RZ6R |MiniZ MR-03 | Orion R10 esc | LRP motors | Orion 90c lipos Rusti Design - Awesome custom stickers and cool stuff My trader feedback |
#4
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Manuals are only an indication, you should always make sure your gears are shimmed properly, with minimum amount of play and no tight spots. This is true for any shaft car.
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#5
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Same here 1 pair of rear gears per 2 races today!!!
WHY!!!!
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Gareth Hill Schumacher - Sanwa - LRP - Mb models |
#6
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I did some rear gears today. They had done around 5 or 6 hours of running so wasnt too bothered. Make sure that you mesh them tightish! I think ive got 7 shims on the long outdrive side and 4 on the other. Also make sure that when you change the gears you clean the gearbox casing out of any dirt!
BJ
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Schumacher Racing - Reedy - Schelle - TKR - Bandicoot Bodies - MIP - Nextlevelrc - Trishbits - Moss Models |
#7
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Quote:
Yeah well the first pair today that went had been in ages!!!!!!!!!!!!!!!! Ive got just factory so i think its 3 (short) and 4 (long) When you say tight how are you checking the tightness etc. Thanks bud
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Gareth Hill Schumacher - Sanwa - LRP - Mb models |
#8
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I would say that the mesh will be too loose with 3 and 4 shims. Try what im running and see what the backlash is like.
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Schumacher Racing - Reedy - Schelle - TKR - Bandicoot Bodies - MIP - Nextlevelrc - Trishbits - Moss Models |
#9
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A rough guide to setting all shaft drive gearboxes is
keep adding shims until all lateral movement of the diff is eliminated starting with all shims on long outdrive put diff in gearbox and check backlash move shims onto short outdrive checking backlash each time once all backlash is removed transfer thinest shim available back onto long outdrive it is also worth checking the movement of the pinion gear as this might also require shims |
#10
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What is backlash?
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#11
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Slight movement between the gears, you should have some between motor pinion and spur as well!
HTH
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:: AE B5MCE - SP 7.5 v3.0 Brushless Motor - Reedy Shorty Lipo - Savox Servo - Spektrum Rx :: :: Paint By Turnip Paint :: |
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