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Manafacture: MTD File size: 2.11 mb File name: 906810e3-a308-39d4-c1be-c089e02771d5.pdf Language of manual:

Do not allow rope and handle to snap back into place. 3. After two or three full firm pulls on recoil (or as soon as engine fires), move speed control to run position. 4. Self Propelled Models Only - To engage the drive mechanism, squeeze the clutch grip against the upper handle. Release the clutch grip to stop the forward motion. FIGURE 16 CARBURETOR ADJUSTMENT TO STOP ENGINE 1. To stop engine, move throttle control lever to STOP position. 2. Disconnect spark plug wire and ground to prevent ^ accidental starting while-equipment is unattended. If any adjustments are made to the engine while the engine is running (e.g. carburetor), disengage all clutches. Keep clear of all moving parts. Be careful of heated surfaces and muffler. Operate a new engine at intermediate speeds and light load for the first few hours as you would a new automotive engine. If carburetor needs adjustment to start or for operation, see "Carburetor Adjustment" section of engine manual. 9 I CLUTCH ROD ADJUSTMENT (Self Propelled Models Only) To adjust the clutch rod, refer to step number 8 under assembly instructions. LUBRICATION Wheels - Rear wheels are provided with oil lite bearings. Place a few drops of SAE 30 oil on each bearing once a season. Gear Box (Self Propelled Models Only) - The gear box lubricated with 2 ounces of High Temp. (450° F.) grease. Order part number 727-0120. Periodically check lubricant level by removing the two self-tapping screws on the gear box cover and lifting off the cover. Do not change grease; simply add if necessary. MAINTENANCE Disconnect sparkplug wire and ground it against the engine before performing any repairs or maintenance. BELT REPLACEMENT (Self Propelled Models Only) 1. Remove the nozzle or impeller guard from front of air duct housing. Remove hex bolt and lock washer from center of impeller. See figure 17. A 9/16" socket wrench with extension is needed. Remove hand knob and belleville washer from top of housing. Remove two self-tapping screws which hold the belt guard. See figure 18. A 3/8" wrench is required. Lift off belt guard. 2. 3. 4. IMI’b-LLtH ASShMKLY FIGURE 17 »ELI liU FIGURE 18 5. Slide belt off the impeller pulley. Slide housing and impeller off engine crankshaft. Be careful to not lose square key. See figure 19. ENGINE CRANK S P.T.O. PULLEY FIGURE 19 10 5. Slide belt off crank shaft. 7. Remove belt from P.T.O. pulley and install new belt. See figure 19. NOTE When reassembling the new belt, the aid of another person will be helpful. 8. Turn the crankshaft until the key way on shaft is directly on top. While holding housing assemlby and impeller assemlby, line up the key way on the pulley with the key on the crankshaft, and slide housing and impeller assemblies onto crankshaft. 9. Secure impeller to crankshaft with hex bolt and lockwasher, removed in step 2. Tighten securely. 10. Slip belt over impeller pulley and reassemble the belt guard. 11. Reassemble the nozzle or impeller guard. OFF-SEASON STORAGE *Yhe following steps should be taken to prepare the unit for storage. 1. Clean the engine and the entire unit thoroughly. 2. Refer to engine manual for correct engine storage instructions. 3. Store unit in a clean, dry area. 11 Models 675, 685 and 689 IF YOU WRITE TO US ABOUT THIS ARTICLE OR IF YOU ORDER REPLACEMENT PARTS ALWAYS MENTION THIS MODEL & SERIAL NO MODEL 12 675/ 685/689 PARTS LIST FOR MODELS 675, 685, 689, 24677 and 24687 POWER VACUUMS ief- 0. Part No. Color Code DESCRIPTION New Part Ref. No. Part No. Color Code DESCRIPTION New Part 1 05778 Clutch Grip Ass'y.t 40 748-0135 Bevel Gear.62" I.D. x 28 2 711-0679 Clevis Pin .375" Dia. x 1.88" Teetht Lg.t 41 715-0246 Spring Pin Spiral 3/16" Dia. 3 747-0154 Clutch Rod 32" Lg.t x 1.25" Lg.t 4 749-0482 Handle Brace (5 H.P.) 42 710-0726 Hex Wash. Hd. "AB” Tap Scr. 749-0484 Handle Brace (8 H.P.) 5/16" x .75" Lg. 5 Part of Engine 43 712-0267 Hex Nut 5/16-18 Thd.* 6 710-0776 Hex Wash. Hd. "AB" 44 736-0119 L-Wash. 5/16" I.D.* 1/4" x .62" Lg.t 45 736-0119 L-Wash. 5/16'' I.D.* 7 14558 Belt Guard t 46 748-0201 Spacer .63 I.D. x .88" O.D. 8 714-0114 Square Key 1/4" x 1/4" x x .56" Lg.t 2.00" Lg.* 47 14530 - 488 Side Plate 9 14536 - 488 Air Vane Plate Ass'y. (675 and 48 715-0139 Spring Pin Spiral 3/16" Dia. 677) x .81" Lg.t 14557 - 488 Air Vane Plate Ass y. w/pulley t 49 748-0288 Drive Pinion t 10 710-0442 Hex Bolt 5/16-18 x 1.50" 50 710-0170 Hex Locking Bolt 5/16-24 Lg.* x .62" Lg. 11 754-0219 "V"-Belt MT x 26" Lg.t 51 736-0159 FI.-Wash. .34" I.D. x 87" 12 736-0119 L-Wash. 5/16" I.D.* O.D. 13 712-0267 Hex Nut 5/16-18 Thd.* 52 Ball Bearings - Part of Wheel 14 14527 - 488 Engine Mounting Frame Ass'y. (Ref. 53) Ass'y. 53 734-1035 Wheel Ass'y. - Comp. 12" x 3" 15 1544-019 Cotter Pin 5/32" Dia. x 1.25" 54 750-0194 Spacer .63" I.D. x 1.00" O.D. Lg...

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