Drive belt started smoking

[Rusty Tinsnips 477]

I had started the 1970 Raider 10 HH100 to warm it up for a few minutes while I loaded construction debris in the cart from building the new "horse barn". Had the parking brake on and throttle a little over halfway up. Suddenly the belt started smoking at the engine pully after sitting there running for about 3 or 4 minutes. What could cause this? The belt has only 10 or so hours on it, not frayed anywhere, looks like new still.

[Maxwell-8 4,290]

strange? 

In neutral or in gear has little influence on the belt. So does it also smoke the belt when you are driving for that amount of time? 

[wallfish 17,079]

Something locked the belt up

Idler pulley would be the first suspect, like the bearings are bad.

[Rusty Tinsnips 477]

Belt shouldn't be moving with the parking brake on?

 

[Rusty Tinsnips 477]

That is the only time it has done it. Works fine when moving.

 

[Maxwell-8 4,290]

7 minutes ago, Rusty Tinsnips said:

Belt shouldn't be moving with the parking brake on?

 

The park brake only locks the brake pedal not the clutch.

[Rusty Tinsnips 477]

Mine locks the clutch peddle all the way down also.

[Maxwell-8 4,290]

1 minute ago, Rusty Tinsnips said:

Mine locks the clutch peddle all the way down also.

That would be bad, since the belt will be slipping over a pulley. I guess their is your problem.

[Rusty Tinsnips 477]

2 hours ago, Maxwell-8 said:

belt will be slipping over a pulley

Belt doesn't move when the clutch is depressed. The belt is pushed off the pulley by the belt guard tabs. Doesn't touch the pulley until something happened and it touched it hard enough to smoke it after sitting there running for a few minutes.

 

[Maxwell-8 4,290]

8 hours ago, Rusty Tinsnips said:

Belt doesn't move when the clutch is depressed. The belt is pushed off the pulley by the belt guard tabs. Doesn't touch the pulley until something happened and it touched it hard enough to smoke it after sitting there running for a few minutes.

 

It pushes the belt partially away from the trans or engine pulley that is correct. And that contributes to some wear. That's way I have never heard a machine were you can lock the clutch like that.( that have clutch and brakes on a seperate pedal). I bet you some linkage is wearing or coming loose. slightly tensioning the belt. But when you are in neutral that shouln't be that of a high load to burn and smoke a belt...