8. With the clutch disengaged, check that there is more than 1/32 in. (0.8 mm) clearance between friction disc and drive plate assembly. IMPORTANT: If spring length cannot be adjusted within specified range, see your Dealer for repairs. ATTACHMENT DRIVE BELT REPLACEMENT Remove old attachment drive belt: 1. Shut off engine and allow to cool completely. 2. Remove belt cover (Figure 33). 3. Remove hair pin under the control panel connecting the discharge chute rod from the chute rotation lever and slide the discharge chute rod forward. IMPORTANT: Disconnect chute lock cable and deflector cable, if equipped. 4. Remove belt finger (Figure 34). IMPORTANT: Use care when rotating the belt fingers. DO NOT bend belt fingers out of shape. 5. Remove attachment drive belt from engine sheave (it may be necessary to turn engine sheave using recoil starter handle). IMPORTANT: To avoid bending bottom cover when tipping unit apart, support handlebars firmly or tip unit up on housing and remove bottom cover by removing six cap screws before separating unit. 6. Support Sno-Thro frame and housing. 7. Remove hex bolts securing housing to frame (three on each side). Tip housing and frame apart on pivot pins (Figure 33). 8. Remove attachment drive belt from attachment pulley (hold brake away from belt). CAUTION: Always support Sno-Thro frame and blower housing when loosening the cap screws holding them together. Never loosen cap screws while unit is in service position. Figure 33 1. Pivot Pin 2.Housing Cap Screws 3. Belt Cover 2 3 1 OS7215 Figure 34 1.Traction Drive Belt 2.Engine Sheave 3. Attachment Drive Belt 4.Belt Finger 5. Attachment Belt Idler 6. Attachment Pulley 7. Attachment Idler Adjustment Nut 8.Traction Belt Idler 9.Traction Drive Pulley OS7220 1 2 3 4 5 8 9 6 7 GB - 28 Install new attachment drive belt: 1. Place new attachment belt onto attachment pulley. NOTE: Holding down the attachment clutch lever will make it easier to reconnect the housing and frame. 2. Tip housing and frame back together and secure with hex bolts. 3. Place belt onto engine sheave. 4. Reposition and secure belt fingers. IMPORTANT: With clutch lever engaged, belt finger on the side opposite the belt idler should be less than 1/8 in. (3 mm) from belt, but not touching the belt. Adjust belt finger as necessary. 5. Check adjustment. See Attachment Clutch/Brake Adjustment on page 25. 6. Reconnect chute crank and secure with spring clip. Reconnect chute lock cable and deflector cable. 7. Replace belt cover. TRACTION DRIVE BELT REPLACEMENT NOTE: Replacement will be easier with housing and frame tipped apart and bottom cover off. 1. Remove attachment drive belt (see Attachment Clutch/Brake Adjustment on page 25). 2. To gain belt clearance, back out the stop bolt from the frame until the drive plate assembly can swing past it (Figure 35). 3. Pull idler away from traction drive belt and remove belt from idler pulley, engine sheave and driven pulley (it may be necessary to turn engine pulley using recoil handle). 4. Install new traction drive belt onto attachment pulley and engine sheaves. 5. Pull the drive plate assembly toward the friction disc and tighten the stop bolt. NOTE: Make sure the drive plate assembly return spring remains connected to the frame. 6. Replace attachment drive belt (See Replace Attachment Drive Belt). FRICTION DISC REPLACEMENT 1. Place unit into service position. 2. Remove bottom cover by removing six hex bolts. 3. With axle locked, hold one wheel so friction disc will not rotate and remove three cap screws holding friction disc to carrier. 4. Remove both wheels. 5. Remove right and left bearing flanges from frame. 6. Slide hex shaft to the left enough to remove pinion sprocket from hex shaft. 7. Slide hex shaft to the right enough to remove friction disc. 8. Slide new friction disc onto hex shaft. 9. Install pinion sprocket and chain on hex shaft, then replace bearing flanges. 10. Hold wheel so friction disc will not rotate and secure new friction disc to carrier with three hex screws removed in step 3. 11. Replace wheels. 12. Replace bottom cover. 13. Adjust traction drive clutch (see Traction Drive Clutch Adjustment on page 26). WARNING: AUGER / IMPELLER MUST STOP within 5 seconds when attachment clutch lever is released or unit damage or serious injury may result. Figure 35 OS7225 1.Cap Screw 2.Hex Screw 3.Friction Disc 4.Pinion Sprocket 5.Bearing Cap 6. Idler Hex Shaft 7.Drive Plate Assembly 8.Stop Bolt 1 2 3 1 5 1 6 1 8 7 4 BATTERY (926500, 501) Charging 1. Place unit on a level surface and shut off engine. 2. Disconnect negative (-) cable first, then positive (+) cable. 3. Loosen wing nut and remove battery. Place battery on bench or other well ventilated place. 4. Connect positive (+) lead of charger to positive (+) terminal, and negative (–) lead to negative (–) terminal. 5. Charge the battery at two and a half amps for ten hours. 6. Reinstall battery into unit and connect positive (+) cable first, then negative (-) cable...

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