Heavy 10 Bad squeal in back gear - cone pulley stuck to bull gear Please advise

[Siliconbronze]

Hello,

My 1959 Heavy 10 just started making a horrible squealing noise in back gear and the spindle doesnt want to turn. I am not able to move the bull gear independently of the cone pulley. The pin in the bull gear is in the out position and I cant line up the bull gear with the cone pulley to press the pin in.

Note that the lathe seems to run fine with back gear disengaged.

Any help would be greatly appreciated!

 

[BDRetz]

Is the pin partially sheared and locked between pushed in and pulled out?
Other thought is the cone pulley is seized to the spindle. Forcing oil into the cone pulley might free it up.

Good luck freeing everything up.

Ben

 

[Siliconbronze]

Is the pin partially sheared and locked between pushed in and pulled out?
Other thought is the cone pulley is seized to the spindle. Forcing oil into the cone pulley might free it up.

Good luck freeing everything up.

Ben

Do you mean forcing oil into the oil hole? or between the cone pulley and the bull gear? Thank you for your help...

 

[SLK001]

Do you mean forcing oil into the oil hole? or between the cone pulley and the bull gear? Thank you for your help...

He means forcing oil into the "OIL" hole on the cone pulley. It sounds like your cone pulley is frozen to the spindle. If it is frozen by dried up lubricant, a light solvent like diesel, or kerosene might just dissolve the dried up gunk. If it is frozen by rust, it might be time to pull the spindle and clean things up.

 

[Siliconbronze]

He means forcing oil into the "OIL" hole on the cone pulley. It sounds like your cone pulley is frozen to the spindle. If it is frozen by dried up lubricant, a light solvent like diesel, or kerosene might just dissolve the dried up gunk. If it is frozen by rust, it might be time to pull the spindle and clean things up.

It "seized" while it was running... could the bull gear be "welded" to the cone pulley?

 

[BDRetz]

Not likely the bull gear “welding” to the cone pulley. There is usually quite a bit of clearance between them. I can slip a .020” feeler gauge between them on mine. The clearance between the cone pulley and spindle is probably .002” though. If it ran dry and got hot bad things could have happened.

I hope this helps.

Ben

 

[SLK001]

It "seized" while it was running... could the bull gear be "welded" to the cone pulley?

Running in back gear? The only time that oil is needed in the cone pulley is when it is in back gear, because it spins on the spindle. Were you using oil, or grease in the "OIL" port? If grease, there is a chance that the cone pulley welded itself (really) to the spindle, or scored itself so bad that it will no longer turn on the spindle. Regardless what is stamped on the cone pulley, if you used grease, you have identified your problem.

 

[Siliconbronze]

Running in back gear? The only time that oil is needed in the cone pulley is when it is in back gear, because it spins on the spindle. Were you using oil, or grease in the "OIL" port? If grease, there is a chance that the cone pulley welded itself (really) to the spindle, or scored itself so bad that it will no longer turn on the spindle. Regardless what is stamped on the cone pulley, if you used grease, you have identified your problem.

Luckily, I didnt use grease there... It was running in back gear when it seized, that's why I'm concerned about the "welding"... I appreciate the help.

 

[Siliconbronze]

Not likely the bull gear “welding” to the cone pulley. There is usually quite a bit of clearance between them. I can slip a .020” feeler gauge between them on mine. The clearance between the cone pulley and spindle is probably .002” though. If it ran dry and got hot bad things could have happened.

I hope this helps.

Ben

Thanks for the info...