HL T99A issues

[dai phan]

Hello all,

This is my 10th tank just bought from TH and the inner right rear light does not work. I am requesting Toucan to help me on this. Can you all tell me how to fix the problem? Second issue is these parts came off the tank and others seem to be glued to the chasis. Do I glue these in? W/O glue they keep coming off. Thanks Dai

[Rubicon99]

Hello all,

This is my 10th tank just bought from TH and the inner right rear light does not work. I am requesting Toucan to help me on this. Can you all tell me how to fix the problem? Thanks Dai

It’s most likely a bad LED. It happens from time to time. You can do nothing and just live with it or replace the LED. If memory serves HL sells the entire rear panel that includes the rear lights. Kind or overkill IMO to go the route.

Personally I would replace just the bulb if it bothered me.

[dai phan]

It’s most likely a bad LED. It happens from time to time. You can do nothing and just live with it or replace the LED. If memory serves HL sells the entire rear panel that includes the rear lights. Kind or overkill IMO to go the route.

Personally I would replace just the bulb if it bothered me.

How would I go about replacing the bub? But I think Toucan will take care of me. Still I want to learn how to fix it. Dai

PS: I edit the thread with a second problem. I hope you can help me too. Thanks Dai

[Rubicon99]

How would I go about replacing the bub? But I think Toucan will take care of me. Still I want to learn how to fix it. Dai

PS: I edit the thread with a second problem. I hope you can help me too. Thanks Dai

Those appear to be return rollers. If so just glue them in place.

[dai phan]

Those appear to be return rollers. If so just glue them in place.

with CA?

[dai phan]

TH sent me the replacement lights and I got the problem solved. But after running the tank for 5 minutes, the tank stops making turns or even moving forward. The sprocket shafts now do not move with the motors so the motors need to be replaced. To be honest I am getting tired of this crap. Same thing happened to my HL Panther G. Very typical of Chinese engineering. Dai

[Rubicon99]

TH sent me the replacement lights and I got the problem solved. But after running the tank for 5 minutes, the tank stops making turns or even moving forward. The sprocket shafts now do not move with the motors so the motors need to be replaced. To be honest I am getting tired of this crap. Same thing happened to my HL Panther G. Very typical of Chinese engineering. Dai

Not quite understanding your situation? Are the motors turning and the shaft is not?

[dai phan]

Not quite understanding your situation? Are the motors turning and the shaft is not?

Correct. That is what happened to my Panther G and they sent me a whole new motor. Dai

[Cascabel]

TH sent me the replacement lights and I got the problem solved. But after running the tank for 5 minutes, the tank stops making turns or even moving forward. The sprocket shafts now do not move with the motors so the motors need to be replaced. To be honest I am getting tired of this crap. Same thing happened to my HL Panther G. Very typical of Chinese engineering. Dai

Open up the tank and examine the gearboxes. I had a shaft fall out of a couple of mine (once on each side). Motors still ran, but the shaft and one gear fell out. Toucan sent me a replacement gearbox, but while waiting for it to arrive, I figured out a repair and fixed the problem myself. When it happened with the gearbox on the other side, I used the same procedure to fix it, and it's still working fine.

[Rubicon99]

Correct. That is what happened to my Panther G and they sent me a whole new motor. Dai

Not seeing the gearbox and taking an educated stab in the dark it sounds like you have a blown/damaged gear somewhere in the gearbox. I would remove the gearbox and motor (super easy to do) inspect the gears and disassemble the box (also easy to do). This would provide for a clear understanding of what your issues is. I suspect it will be an easy fix .

[dai phan]

Not seeing the gearbox and taking an educated stab in the dark it sounds like you have a blown/damaged gear somewhere in the gearbox. I would remove the gearbox and motor (super easy to do) inspect the gears and disassemble the box (also easy to do). This would provide for a clear understanding of what your issues is. I suspect it will be an easy fix .

I want to upgrade the gear box to something better. Please suggest. I am opening the tank now. Dai

[Rubicon99]

I want to upgrade the gear box to something better. Please suggest. I am opening the tank now. Dai

Black Taigen bearing gearboxes are about the best balance of durable and price going. I have yet to break one or strip any gears in one and I have been using them for years.

[dai phan]

I open the tank and inspect the gears carefully. No broken gears, no falling out shafts. Everything is snug. Every screw is tight everywhere including road wheels, idlers and sprockets. The sprocket shafts turn when motors are on but on the ground, the tank barely moves and cannot do spin. Looks like the motors simply does not have the strength to do anything except freewheeling. The battery is Admiral 7000 mAh fully charged. My guess is one or both motors are bad. Comments please. Dai

[dai phan]

Not quite understanding your situation? Are the motors turning and the shaft is not?

When NOT on the ground the shafts turn with the motors. On the ground almost no movements. Battery is fully charged. Every screw is tight. Dai

[Rubicon99]

I open the tank and inspect the gears carefully. No broken gears, no falling out shafts. Everything is snug. Every screw is tight everywhere including road wheels, idlers and sprockets. The sprocket shafts turn when motors are on but on the ground, the tank barely moves and cannot do spin. Looks like the motors simply does not have the strength to do anything except freewheeling. The battery is Admiral 7000 mAh fully charged. My guess is one or both motors are bad. Comments please. Dai

Sounds like you “spun out” your drive shaft gear which does happen. This means it is slipping on the shaft and not providing power to the sprocket while under a load.

Are your gears steel or zinc? Easy to tell with the simple magnet test. It is more common for the zinc gear on the drive shaft to slip, but steel ones can too though usually after a bit of hard outdoor use which your tank does not appear to have.

[dai phan]

Sounds like you “spun out” your drive shaft gear which does happen. This means it is slipping on the shaft and not providing power to the sprocket while under a load.

Are your gears steel or zinc? Easy to tell with the simple magnet test. It is more common for the zinc gear on the drive shaft to slip, but steel ones can too though usually after a bit of hard outdoor use which your tank does not appear to have.

I worked on the tank until 3 am this morning. This is the update. I have a set of brand new 5.3 steel gear boxes and I replaced both of the boxes. While doing it, I saw a suspension arm not screwed down well enough that caused it to brush hard against the idler. So I remove the road wheel and tightened the hex screw ( very stripped) on the arm and place the road wheel back to the proper location. Maybe this caused friction not allowing the tank to move forward or spin. But I am glad I replaced the gear boxes because the 5.3 version seems to run smoother. Then the control got all messed up. After an hour of switching motor wires, rebind, wildly play around with the control sticks/buttons I ALMOST have it corrected. Now the forward is reverse meaning forward stick puts the tank in reverse ! Please tell me how to correct the problem. Thank YOU !!! Dai

[dai phan]

Sounds like you “spun out” your drive shaft gear which does happen. This means it is slipping on the shaft and not providing power to the sprocket while under a load.

Are your gears steel or zinc? Easy to tell with the simple magnet test. It is more common for the zinc gear on the drive shaft to slip, but steel ones can too though usually after a bit of hard outdoor use which your tank does not appear to have.

Steel gears and confirmed with magnet test. Dai

[Rubicon99]

I worked on the tank until 3 am this morning. This is the update. I have a set of brand new 5.3 steel gear boxes and I replaced both of the boxes. While doing it, I saw a suspension arm not screwed down well enough that caused it to brush hard against the idler. So I remove the road wheel and tightened the hex screw ( very stripped) on the arm and place the road wheel back to the proper location. Maybe this caused friction not allowing the tank to move forward or spin. But I am glad I replaced the gear boxes because the 5.3 version seems to run smoother. Then the control got all messed up. After an hour of switching motor wires, rebind, wildly play around with the control sticks/buttons I ALMOST have it corrected. Now the forward is reverse meaning forward stick puts the tank in reverse ! Please tell me how to correct the problem. Thank YOU !!! Dai

Yes the older steel “black gears” do run smoother. Has to do with the way the gear “teeth” are cut. I prefer them over the new steel “silver gears”.

So forward is reverse and reverse is now forward? If so, I would simply swap the motor power lines around from red/red, blk/blk to red/blk on each motor. This is a common practice and most often done with the red 390 motors. I have never had it hurt anything.

If reversing the wires does not work then there is another issues.

[dai phan]

Yes the older steel “black gears” do run smoother. Has to do with the way the gear “teeth” are cut. I prefer them over the new steel “silver gears”.

So forward is reverse and reverse is now forward? If so, I would simply swap the motor power lines around from red/red, blk/blk to red/blk on each motor. This is a common practice and most often done with the red 390 motors. I have never had it hurt anything.

If reversing the wires does not work then there is another issues.

Anything I did with the TX that can cause this issue? Dai

[Rubicon99]

Anything I did with the TX that can cause this issue? Dai

Not that would cause the forward to now be reverse. Some of the new 6.0 tanks have the option to switch to left stick driving but forward is still forward.