Posted January 09, 2012 - 09:06 AM
Posted January 09, 2012 - 09:50 AM
A few thoughts, Trent:
1) The new PTO belt, or its adjustment, should not cause the roll pin to shear inside the gearbox.
2) Are the needle bearings on the input shaft of the gearbox good? ......Is the input shaft worn where it passes through the bearings? ......What about the other needle bearings and shaft?
3) Are there burrs, roughness, or deformed teeth on either gear? .....It's okay to file any rough spots or sharp edges that should not be present. .....Is there a piece of broken roll pin in the gearbox or wedged into a gear tooth?
4) If the holes through the input shaft and bevel gear are elongated from repeated pin shearing, the pin is more likely to shear again.
5) On earlier model snowblowers, there should be a shear bolt through the small (drive) sprocket. .....This is supposed to protect the rest of the drive parts when gravel or something jams the auger. .....If this has been replaced with the incorrect bolt, the stress is transferred to the next weakest connection. .....Later model blowers used roll pins in the drive coupling.
6) Are you using the correct size roll pin? ......I think (CRS) it should be 1/4" x 1-1/4" for the small gear, and 1/4" x 2" for the large gear. .....Does the roll pin fit tightly in the gear and the shaft?
7) Is one of the universal joints on the PTO binding?
8) Does the U-joint that is attached to the gearbox fit snugly on the input shaft?
- Bolens 1000 said thank you
Posted January 10, 2012 - 09:46 AM
Posted January 10, 2012 - 10:00 AM
Thanks Bruce. I tore it apart again . Totally cleaned it up. I may be in for a new shaft and bearings. I have a spare gear box off a deck that i thought i could make work, but when I got it open it had different gears. They were all slanted instead of beveled, if that makes sense. Could they be used if I had to swap out eveything and just change the shafts?
You could swap the gears.
The Old "straight" style gears were replaced by the newer style that were slanted.
- Trent Thomson said thank you