Hi All,

First post here, but ive been reading the forums for awhile...

I'm currently building the b model of 42043 and I have an issue with the gearbox....im at the stage where ive done the trailer but before the crane....

the issue is that the outrigger / turntable side works fine.....but there seems to be no power going to the air pump / trailer stand part.....ive read and reread the instructions and cant figure it out.....

i cant quite figure out how it works...as it looks like the red gear behind the clutch gear is supposed to drive that side...but it doesnt grip the axle.....if that makes sense....

ive built a few gear boxes before (including the 42042 blue crawler, the porsche, and a few others...) and didnt have any issues...so im a bit frustrated.....

anyone have any insight?

Thanks

 

Paul

 

I have been looking at the manual and from what i see, it is 16t gear from step 12 on page 305 that drives the red gear behind the white clutch gear. The axle it is on also has the 8t gear which drives the white clutch gear. That same axle, is connected with the axle that comes from the electric motor and drives both the red gear and the clutch gear. This means that the red gear must not grip the axle that it is on, but transmit its rotation to the 16t gear that you have placed on step 15 on page 293. This then drives the gear selector axle via 2 16t gears. 

I hope this helps you enough, or else I have to rebuild it myself and see what happens then

 

I have a built 42043 B, so I think I can help. Can you include some photos of your assembly?

2 hours ago, Epicentre said:

I have been looking at the manual and from what i see, it is 16t gear from step 12 on page 305 that drives the red gear behind the white clutch gear. The axle it is on also has the 8t gear which drives the white clutch gear. That same axle, is connected with the axle that comes from the electric motor and drives both the red gear and the clutch gear. This means that the red gear must not grip the axle that it is on, but transmit its rotation to the 16t gear that you have placed on step 15 on page 293. This then drives the gear selector axle via 2 16t gears. 

I hope this helps you enough, or else I have to rebuild it myself and see what happens then

 

sigh.......lol, maybe if i hadn't actually failed to do step 12, i would of had more success.....but thanks, i looked at that over and over and failed to notice what i missed.....

now, for the fun part of trying to figure out the path of least resistance to fix it:)

thanks again to you both....

Edited March 7, 20195 yr by Vohaul

I'm happy that you found the problem. I wish you good luck with fixing it without having to rebuild the complete thing.

The transmission from the motor goes to two separate gearbox.

One gearbox controls the crane rotation and the outriggers. These two functions need movement limters, so the transmission has to go through the small 8z gear and the 24z clutch gear.  

The other gearbox controls the compressor and the outriggers. Since the compressor doesn't need movement limiters, and the LA has internal clutch, this gearbox doesn't need the white 24z clutch gear. The missing gear in front of the 8z gear in your picture is the one links to this gearbox.

 

Edited March 7, 20195 yr by Ngoc Nguyen