Don't know where to start

rctrucker

Active Member
Messages
33
Location
New England
I bought this FG truck with mostly stock parts from someone on eBay. I ran it the second time on the field today and while driving, I the truck slowed down and then completely stopped. The engine was still running and I could increase the throttle and heard the engine rev louder, but the truck couldn't move.

Where do I start troubleshooting? I noticed that when I used my finger to stop the big gear inside of the rear chassis (not the 16/48 pinions outside of the chassis,) the rear wheels were moving with little resistance. Is this normal?

Thanks.
 

Timmahh

Bajastafarian Madnes
PLUS member
Messages
3,376
Location
Michigan
spur gear/pinion mesh. clutch shoes, alot of times the grub screws (set screws) will loosen in the axels, check all the gears, make sure bearings are good and not binding.
 

fgbasher

Well-Known Member
Messages
200
Location
USA
Check the following:

1-Spur gear carrier- if plastic it probably rounded out- upgrade to the alloy one (#6439)
2-check the wheel squares on the rear wheels- the grub screws may have loosened causing the tires not to turn under throttle.
3- check the ring gear on the diff, sometimes the screws come loose
4- check the layshaft gear or the clutchbell gear.

If it is not one of these, it may be your clutch but it is probably one of the three above.
 

rctrucker

Active Member
Messages
33
Location
New England
Thank you all for the quick replies.

I found these 2 things before attempting taking the truck apart to check the itemized possible issues listed by rcnutshobbies.

. The throttle servo (not sure that's the right name to call it) that drives two long metal sticks...looking from the back, the stick on the right is still in tact with the rest of the movement. The stick on the left is not. It's running loose. As in, when the servo moves, only the stick on the right is being effective. What's the one on the left for?

. I found a steel 14-tooth pinion fallen out from the chassis. What is this? It appears to be part #6067 in the picture from the manual, but I'm not sure.

Thanks to the community for the help.
 

allanach

Well-Known Member
Messages
388
Location
Brisbane
Thank you all for the quick replies.

I found these 2 things before attempting taking the truck apart to check the itemized possible issues listed by rcnutshobbies.

. The throttle servo (not sure that's the right name to call it) that drives two long metal sticks...looking from the back, the stick on the right is still in tact with the rest of the movement. The stick on the left is not. It's running loose. As in, when the servo moves, only the stick on the right is being effective. What's the one on the left for?

. I found a steel 14-tooth pinion fallen out from the chassis. What is this? It appears to be part #6067 in the picture from the manual, but I'm not sure.

Thanks to the community for the help.

The two long metal sticks..... one of them should be hooked to you carb for throttle and the other should float through an eyelet for the brake function.
FYI, substitute metal sticks for: Throttle / brake linkage or push rods.

That gear that you found is off the layshaft, that's why the car wont move forward.
 

rctrucker

Active Member
Messages
33
Location
New England
Allanach:

Thank you so much. I wish the manual has the terms there for me. Do you know the part number for the layshaft and the 14-tooth steel gear on the layshaft?

Thanks.
 
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