Repairs JS63C Self Drive Is not Working

[chrisboy68]

Hi,

Been struggling to repair my JS63C self drive. The transmission is engaging fine and the rear drive axel turns. The issue is the pinion gear does not make a connection to the wheel's spur gear. Its slips and makes a grinding noise like the pinion gear is just touching the outside the spur gear. I have replaced both spur gears and rear tires. Greased and cleaned like the manual says, made cable tension adjustments and I still have the problem. I'm going to replace the pinion gears for grins, but the current ones look fine.

Anyone have this mower that experienced similar problems and has some suggestions on a resolution? Thank you!

Chris

 

[Retiredcarguy]

Hi,

Been struggling to repair my JS63C self drive. The transmission is engaging fine and the rear drive axel turns. The issue is the pinion gear does not make a connection to the wheel's spur gear. Its slips and makes a grinding noise like the pinion gear is just touching the outside the spur gear. I have replaced both spur gears and rear tires. Greased and cleaned like the manual says, made cable tension adjustments and I still have the problem. I'm going to replace the pinion gears for grins, but the current ones look fine.

Anyone have this mower that experienced similar problems and has some suggestions on a resolution? Thank you!

Chris

Is there one or more shims on the side of the both gears? Lateral play may cause them to push away only under load. Do the gears have any radial play on the shafts?

Are any other gear or shaft bushings worn?

 

[chrisboy68]

Thanks. There is a little play, I'm not sure what is acceptable. I'll look at the parts list and see what else is around spindle that may need replacing. I'll keep trying.

Thanks
Chris

 

[mechanic mark]

Place a couple pieces of 4x4 lumber etc. under deck to take weight off wheels.

 

[chrisboy68]

Yep, I did that. It moves a bit, I looked at the parts and there was nothing that stood out to me. I'll spend more time tinkering.

Chris

 

[chrisboy68]

Ok, I see the issue. Its the right bushing/baring that drive shaft goes into. Now I have to figure out how to get it off or replace. Its almost like its welded on the mower. More googling....

Chris

 

[mechanic mark]

Ok, I see the issue. Its the right bushing/baring that drive shaft goes into. Now I have to figure out how to get it off or replace. Its almost like its welded on the mower. More googling.... Welcome to the forum Chris.

Chris

Click in word error.


Error Use Liquid Wrench Brand penetrating oil to loosen it up. Let us know if this helps or not.

 

[Retiredcarguy]

Ok, I see the issue. Its the right bushing/baring that drive shaft goes into. Now I have to figure out how to get it off or replace. Its almost like its welded on the mower. More googling....

Chris

Glad to hear that found you the cause. The worn bushing and shaft clearances add up to your problem.
I would cut and grind the old bushing off. Measure the shaft for wear and weld, then on the correct size and material replacement.