Maaboo the Witch Posted April 18, 2021 Posted April 18, 2021 18 hours ago, Bartybum said: Damn that looks great. Thoughts on a knuckle crane on the back like this one? Which would've been great on the actual set... Quote
Bartybum Posted April 18, 2021 Posted April 18, 2021 26 minutes ago, Maaboo35 said: Which would've been great on the actual set... Hence why I asked ;) Quote
Maaboo the Witch Posted April 18, 2021 Posted April 18, 2021 13 minutes ago, Bartybum said: Hence why I asked ;) Hell yeah, ask away. Hopefully TLG are paying attention to this topic (yeah, no). Quote
efferman Posted April 19, 2021 Author Posted April 19, 2021 23 hours ago, Maaboo35 said: Hopefully TLG are paying attention to this topic 4 XL only for driving? never! btw... Quote
efferman Posted April 20, 2021 Author Posted April 20, 2021 It seems the new diffs have a bevel gear problem too. Quote
Gray Gear Posted April 20, 2021 Posted April 20, 2021 Wow, that is powerful! Can you tell in which way the diff failed? Did the 2 halves of the diff split apart, or did the gear slip inside with the housing intact? "Des isch zuviel" Quote
efferman Posted April 20, 2021 Author Posted April 20, 2021 11 minutes ago, Milan said: One of the bevel gears, or the big red gear? The inner Bevel gears. The diff spins, but the Crossaxles are jumping. If it is not the inner bevel gear, then the planetary hub. Quote
Milan Posted April 20, 2021 Posted April 20, 2021 For a "quick" test, perhaps you could remove the diff and power the axle directly. Quote
Andman Posted April 20, 2021 Posted April 20, 2021 1 hour ago, efferman said: It seems the new diffs have a bevel gear problem too. Do you see any damage on the inner 12z bevel gears? Quote
Touc4nx Posted April 20, 2021 Posted April 20, 2021 I had a similar problem on a project, under high load, the differential split in two parts, just enough to allow the bevels gear to skip. As the differential splits, it's a bit wider, and therefore, it disconnect the axles. Sadly I haven't found a workaround… Quote
efferman Posted April 20, 2021 Author Posted April 20, 2021 @Andman, no, they seem to be in perfect condition. @Milan, after reassembling it doesnt happen. The drivetrain stops and after a few seconds the hubs are switching the motors of. i guess after 8minutes of permanent high load it pushes the diff and the 5x7 frame wide enough to slip. Should i be satisfied or using my axlesupports to avoid this? Quote
Andman Posted April 20, 2021 Posted April 20, 2021 50 minutes ago, efferman said: Should i be satisfied or using my axlesupports to avoid this? I think you should be satisfied. That test was kind of extreme. Quote
efferman Posted April 20, 2021 Author Posted April 20, 2021 (edited) Found the error. Second gear from the left. Against this the axlesupport wouldnt help Edited April 20, 2021 by efferman Quote
Milan Posted April 20, 2021 Posted April 20, 2021 1 minute ago, efferman said: Found the error. Second gear from the left. Yeah. No way to know was it like that before you put it in the diff? Quote
efferman Posted April 20, 2021 Author Posted April 20, 2021 (edited) 3 minutes ago, Milan said: Yeah. No way to know was it like that before you put it in the diff? I have no idea when i dismantled this diff the last time. Edited April 20, 2021 by efferman Quote
nerdsforprez Posted April 20, 2021 Posted April 20, 2021 Take a pic with the axle through it. Wondering if there would be gap seen (red background through hole with an axle through it.... Quote
efferman Posted April 20, 2021 Author Posted April 20, 2021 10 minutes ago, nerdsforprez said: Take a pic with the axle through it. Wondering if there would be gap seen (red background through hole with an axle through it.... There is no gap. I guess there is enough flex in the complete axle to make it possible for the crossaxle to move outwards. Quote
allanp Posted April 20, 2021 Posted April 20, 2021 Yup, the new diffs are much better but the way the 12t single bevel grips the very end of an axle (that's also rounded on the corners) is still a weak point. Maybe TLG needs to remove most of the indentation on the back of the bevel gear? Quote
nerdsforprez Posted April 20, 2021 Posted April 20, 2021 12 minutes ago, efferman said: There is no gap. I guess there is enough flex in the complete axle to make it possible for the crossaxle to move outwards. No.... I meant this picture. 42 minutes ago, efferman said: Found the error. Second gear from the left. Against this the axlesupport wouldnt help It seems to me that the second from the left (the problematic gear you identified) the four inside corners are much more worn and atrophied compared to the other gears. If you put an axle through this gear I am wondering if we will see any daylight on the other side. If you take it with this red background that should make it easy. If you really want to be high speed, take a pic with the second to the let gear with an axle through it, then one of the other ones, and we can see the differences..... Quote
Ullum Zurt Posted April 20, 2021 Posted April 20, 2021 Long time lurker, 1st time poster. I'm not sure how the new differentials are, but I've noticed skipping under high loads if the differential isn't braced on the other side. Quote
efferman Posted April 20, 2021 Author Posted April 20, 2021 24 minutes ago, Ullum Zurt said: Long time lurker, 1st time poster. I'm not sure how the new differentials are, but I've noticed skipping under high loads if the differential isn't braced on the other side. with the new diffs this issue does not longer exist. Quote
SUPER Max Black Posted May 6, 2021 Posted May 6, 2021 (edited) As I see it, the timber truck project has failed. Last I saw: This is bad. Edited May 7, 2021 by SUPER Max Black Quote
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