[HELP] Struggling Functions in Crawler Crane

[Max The Ace]

Hello everyone 

I am a brand new member to the Euro Bricks community having been a long time browser of the site. I decided to become a member recently due to the failure of one of my sets improperly functioning. I own the Technic Crawler Crane (42042) and have thoroughly enjoyed that set. Just recently it has developed a problem no one can resolve. For some unknown reason, the functions involving moving forwards and back, as well as lowering and raising the boom have started to struggle drastically. New batteries solved nothing, no gears appear broken, and the motor has good torque still. Yet when I try the functions it is clear something is wrong. The turning of the body and the lowering of the claw appear to be fine. I am hoping that someone can help my problem as this set is one of my favorites and it is now discontinued. If anyone can help it would be much appreciated!! Thank you for your time. 

 

Here is the link to a video showing the problem: 

 

Regards

Max

 

[msk6003]

In my oppinon, you put clutch 24t gear(white one) on drive axle.

Most greatest soluction is disassemble and rebuilding.

I'm coming back after reading 42042's instruction

Ah, I was wrong. But one thing is sure. You are assemble to stiff.

Edit second

After reading 42042 instruction, I found motor is direct connect to firct clutch gear. I think this clutch gear is slipping. It cause all gear is assemble to stiff. Give little gap between gear/bush and beam.

 

Edited July 24, 2017 by msk6003

[syclone]

It may be that the clutch gear (24z white gear) got worn out and slips at much lower torque than it should. As said above, rebuilding it is the best way to find out 

[Aventador2004]

A clutch gear has failed, it seems. This can be replaced by removing it, and putting a regular gear, or replacing it. 

Edit, lxf was too quick.

[nerdsforprez]

Replacing clutch gear is easy.  Don't disassemble the whole build. 5 minute fix, tops:

 

Edited July 24, 2017 by nerdsforprez

[aminnich]

Could a wire be getting stuck? 

[mocbuild101]

I would make sure all the gears and axles have a slight wobble to them, and check the clutch gear.

But if all else fails, the best thing is to rebuild it.

Also, welcome to Eurobricks @Max The Ace 

Edited July 25, 2017 by mocbuild101

[Max The Ace]

Hey Guys

Thank you all for the responses back! I have taken most of the gearbox assembly apart and have accessed the clutch gears. Everything else appeared in order so I will be ordering up a new clutch gear and hope that's the problem. I tested the gear and it was slipping quite easily when I inserted a shaft into the center. Seriously though you guys are awesome, thank you for all the help! I love Eurobricks already, haha!

[Aventador2004]

42 minutes ago, Max The Ace said:

Hey Guys

Thank you all for the responses back! I have taken most of the gearbox assembly apart and have accessed the clutch gears. Everything else appeared in order so I will be ordering up a new clutch gear and hope that's the problem. I tested the gear and it was slipping quite easily when I inserted a shaft into the center. Seriously though you guys are awesome, thank you for all the help! I love Eurobricks already, haha!

Just to make sure, order 2 or 3, to have extras, and not buy one every few times.

And try with a regular gear.

[nerdsforprez]

12 hours ago, Max The Ace said:

Hey Guys

Thank you all for the responses back! I have taken most of the gearbox assembly apart and have accessed the clutch gears. Everything else appeared in order so I will be ordering up a new clutch gear and hope that's the problem. I tested the gear and it was slipping quite easily.....

Problem solved!