Section 4 - REPAIR & ADJUSTMENTS
4.1.7.AUGER SHEAR BOLT REPLACEMENT IMPORTANT: If engine is operating correctly and auger/impeller drive belt is not damaged or severed, but the auger/impeller does not rotate it is possibly the auger/impeller shaft shear bolt.
1.Remove shear bolt and nut from auger. Discard old shear bolt and nut. DO NOT reuse bolt or nut under any circumstances. Always replace existing hardware with genuine Snapper new replacement shear bolts and nuts. DO NOT substitute these shear bolts and nuts as auger/impeller and engine damage can result.
2.Install new shear bolts and nuts. Tighten to 5 to
10ft. lb. of torque. See Figure 4.10.
SHEAR
BOLT
GREASE
WORM GEAR
RING GEAR
CHUTE
CRANK
ROD
ADJUSTMENT
BOLT
WORM BRACKET
MOUNTING BOLT
FIGURE 4.11
FITTING
BEARING GREASE FITTING
RUBBER
DRIVE DISC
DRIVE HUB 
FIGURE 4.10
4.1.8. CHUTE CRANK ADJUSTMENT
1.Loosen adjustment bolt. Move crank worm bracket away from ring gear slightly. NOTE: The worm gear should always maintain full contact with ring gear after adjustment. Retighten adjustment bolt. If crank still does not operate satisfactorily, lubricate worm gear and ring gear with grease. See Figure 4.13.
4.1.9. RUBBER DRIVE TIRE REPLACEMENT
1.Tilt machine forward to gain access to drive system area. Secure machine in the tilted position to prevent tipping over. Remove drive system cover plate. See Figure 4.5.
2.Remove the three nuts that secure rubber drive tire to the chain case. Remove drive tire. See Figure
3.Install new rubber drive tire. Reinstall the three nuts. Torque to 15 to 25 ft. lbs. See Figure 4.12.
NOTE: DO NOT remove Drive
Hub from Chain Case Assembly to replace Drive
CHAIN CASE ASSEMBLY
FIGURE 4.12
20