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Old 02-25-2008, 10:51 AM   #1
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Default Problem with my rear belt

I run an XRAY T1FK05 with a MM7700,front solid axe & rear ball differential & brakes on 80%.The rear belt wear out after 5-6 batteries but the front one is like new.What's going on? Any ideas or suggestions?
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Old 02-25-2008, 11:34 AM   #2
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I run an XRAY T1FK05 with a MM7700,front solid axe & rear ball differential & brakes on 80%.The rear belt wear out after 5-6 batteries but the front one is like new.What's going on? Any ideas or suggestions?
MM esc brake system not have good feel !
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Old 02-25-2008, 11:40 AM   #3
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So you think i have to decrease the brake amount? I can do this but i don't understand why the brake amount affects only the rear belt only and not the front one too.
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Old 02-25-2008, 11:44 AM   #4
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So you think i have to decrease the brake amount? I can do this but i don't understand why the brake amount effects only the rear belt only and not the front one too.
I'm have tested LTP TC , NOVAK , Mamba Max & Tekin R1 Pro
MM ESC have try many brake setup , not so good !
other ESC have easy to find your setup !
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Old 02-27-2008, 12:08 PM   #5
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Check the rear belt tension. It may be too loose and slipping under a load. I run a FK05 and the rear belt should be tight.
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Old 02-28-2008, 03:12 AM   #6
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Check the rear belt tension. It may be too loose and slipping under a load. I run a FK05 and the rear belt should be tight.
It's not too loose not too tight.I decreased the brake amount from 80% to 60% to see if it's going better and i increased the punch control from 10% to 30% to "calm" the acceleration from a dead stop.I hope i'll have better luck.
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Old 04-23-2008, 06:56 AM   #7
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The problem persists.I don't know what to do anymore.I can't change the rear belt every day.Any other ideas?
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Old 04-23-2008, 07:26 AM   #8
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Ok, lets take a logical step back from whats been said so far.

Belts wear, period. But this process can be increased to a few things.

1) Binding transmission. With a binding transmission it can stretch the belts with the increased loading put on them.

2) Foreign objects wearing the belt out. This could be internal to the car, such as a loose screw/bolt etc and fraying/scrubbing the belt, or external (such as a stone/whatever) getting into the drivetrain and rubbing the belt up.

3) Worn bearings. With worn bearings, the belt may have more load placed on it every time the motor is spooled up, as there is more movement in the whole belt/drivetrain setup. Replace the bearings and the loading to the belt will then be smoother on spool up.

4) belt tension, already covered, but one which isnt set at the right tension will a) wear prematurely and b) possibly put an increased load on the surrounding drivetrain bearings.

5) To a certain degree, the motor and chosen gearing may play a part into how quickly the belts will wear, but not as quickly as you are describing.

hth
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Old 04-23-2008, 07:30 AM   #9
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My last thought is that the belt you used as a replacement is not the correct type for your car or is of poor quality (I guess this can happen even when brand new out of the packet, and is not manufactured properly)
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Old 04-23-2008, 11:56 AM   #10
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My last thought is that the belt you used as a replacement is not the correct type for your car or is of poor quality (I guess this can happen even when brand new out of the packet, and is not manufactured properly)
Im closer to your last thought about the poor quality belts as i don't use the XRAY kevlar belts but MBL belts (Hotbodies Cyclone wear this brand belts).The strange thing is that i have the problem only on the rear belt and not on the front one.Unless the rear belt is not manufactured properly.I think its time to wear again the XRAY Kevlar belts ,at least the rear, to see how is going on.
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Old 04-23-2008, 03:42 PM   #11
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Do you snap the belt? or does it wear out the cogs?? Asphalt or carpet? How much tension on the belt??
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Old 04-23-2008, 09:00 PM   #12
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Put on an Xray belt and change both pulleys. If your belt tension is correct, your problem will be solved.
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Old 04-24-2008, 02:19 AM   #13
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Put on an Xray belt and change both pulleys. If your belt tension is correct, your problem will be solved.
+1, id stick with whats known as good. Mixing and matching parts to suit your own preference might not suit the car. Tight tolerances of belt length, tooth profile and material type can achieve the undesirable, as described...

You should see the problem go away with the right parts on the car
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Old 04-24-2008, 06:07 AM   #14
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please check your gear pulley....pulley wear out/sharpen will make d belt easily wear out too...
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Old 04-24-2008, 01:56 PM   #15
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Thanks for the info guys.I'll replace the belts with the XRAY original and the pulleys .I think this is the only way to resolve my problem.Thanks again.
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