Yo Joe,
"Since it broke, the gears dropped out of location and are not riding on the side gears=will not transmit power. One of a couple things: Someone dumped the clutch and sheared the pin because all the power is transmitted through it. Or, someone was spinning one wheel real fast, then it caught and the reaction of the two small gears from instantaneous change in speed caused it to snap." By Freightrain
See 9" Rebuild & Gear Setup GREAT ARTICLE!
@
http://www.fnc.ch/index.php?page=279&printview=1
Excerpts:
9. INSTALL DIAL INDICATOR AS SHOWN. MAKE SURE DIAL INDICATOR IS EXTREMELY RIGID, OR RESULTS WILL BE SKEWED. ENSURE DIAL POINTER IS SET SO IT TOUCHES THE TOP OF ONE GEAR TOOTH AND IS TANGENT TO THE OUTER ARC OF RING GEAR TEETH. HOLD PINION ****** SOLID AND ROTATE RING GEAR BACK AND FORTH, ENSURING PINION/****** DOES NOT MOVE. PLAY SHOULD BE EVIDENT AND THE AMOUNT OF BACK AND FORTH PLAY IS CALLED BACKLASH. IT SHOULD BE AROUND .008 TO .012 INCHES.
10. PAINT ALL RING GEAR TEETH, BOTH SIDES, WITH GEAR MARKING COMPOUND (USUALLY A WHITE TYPE OF GREASE). PUT FORCE ON RING GEAR IN EITHER DIRECTION (SMALL RUBBER PAD PRESSED AGAINST RING GEAR TEETH WORKS WELL FOR THIS). SPIN PINION/****** BACK AND FORTH, 10 OR 20 TIMES, ENSURING 5 OR 6 RING GEAR TEETH MESH WITH PINION GEAR TEETH. RELEASE FORCE ON RING GEAR AND ROTATE IT TO A POINT WHERE PREVIOUSLY MESHED TEETH (PATTERN IN GREASE) CAN BE SEEN. PATTERN SHOULD LOOK LIKE CORRECT MESH PATTERN IN DIAGRAM BELOW.
13. USING LARGE ADJUSTABLE WRENCH, HOLD PINION ****** AND REMOVE PINION NUT. REMOVE 5 BOLTS HOLDING PINION, PINION BEARINGS AND RETAINER TO MAIN CASING.
●14. REMOVE PINION ASSEMBLY. CARE SHOULD BE EXERCISED TO PREVENT DAMAGE TO RUBBER O-RING ON PINION ASSEMBLY. ENSURE METAL SHIM(S) BETWEEN MAIN CASING AND PINION RETAINER ARE ACCOUNTED FOR AND NOT DAMAGED. SLIDE PINION OUT OF RETAINER (MAY NEED TO BE PRESSED OUT) AND PRY OFF PINION SEAL ON END OF RETAINER."