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Factory settings are satisfactory for most applications and conditions. If adjustment is needed, refer to the separate engine manual packed with your vacuum. CLUTCH ROD ADJUSTMENT (Self-Propelled Models Only) To adjust the clutch rod, refer to step numbers 3 and 4 under “Attaching the Clutch Rod” in Assembly Instructions. MAINTENANCE A WARNING: Always stop engine and disconnect spark plug wire before cleaning, lubricating or performing any repairs or maintenance. LUBRICATION Wheels—Rear wheels are provided with lite oil bearings. Place a few drops of SAE 30 oil on each bearing once a season. 7 Gear Box (Self-Propelled Models Only)—Tne gear box is lubricated with 2 ounces of High Temp. (450° F.) grease. Order part number 737-0133. Perodically check lubricant level by removing the two self tapping screws on the gear box cover and lifting off th 3 cover. Do not change grease; simply add if necess ary. ENGINE Refer to the separate engine manual for engine maintenance instructions. Maintain engine oil as instructed in the separate engine manual packed with your unit. Read ar d follow instructions carefully. Service air cleaner every 25 hours under normal conditions. Clean every few hours under extreme ly dusty conditions. Poor engine performance and flooding usually indicates that the air cleaner should be serviced. To service the air cleaner, refer to the £ eparate engine manual packed with your unit. The spark plug should be cleaned and the gip reset once a season. Spark plug replacement is recommended at the start of each season; check engine manual for correct plug type and gap specifications. Clean the engine regularly with a cloth or brus h. Keep the cooling system (blower housing area) clean to permit proper air circulation which is essential to engine performance and life. Be certain to remove all dirt and combustible debris from muffler area. BELT REPLACEMENT (Self-Propelled Models Only) 1. Remove the nozzle or impeller guard fron i front of blower housing. 2. Remove hex bolt and lock washer from c enter of impeller. See figure 18. A 9/16" socket wre nch with extension is needed. 3. Remove hand knob and belleville washer from top of housing. 4. Remove two self-tapping screws which hold the belt guard. See figure 19. A 3/8" wren;h is required. Lift off belt guard. FIGURE 19. \ 5. Slide belt off the impeller pulley. Slide housing and impeller off engine crankshaft. Be careful to not lose square key. See figure 20. FIGURE 20. 6. Slide impeller and blower housing assemblies off crankshaft. 7. Remove belt from P.T.O. pulley and install new belt. See figure 20. NOTE: When reassembling the new belt, the aid of another person will be helpful. 8. Turn the crankshaft until the keyway on shaft is directly on top. While holding housing assembly and impeller assembly, line up the keyway 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 lock washer, removed in step 2. Tighten securely. 10. Slip belt over impeller pulley. Reassemble the belt guard. 11. Secure blower housing with hand knob and washer. 12. Reassemble the nozzle or impeller guard. 8 \ OFF-SEASON STORAGE The following steps should be taken to prepare your vacuum for storage. 1. Clean and lubricate the vacuum thoroughly as described in the lubrication instructions. 2. Refer to engine manual for correct engine storage instructions. 3. If storing in an unventilated or metal storage shed, coat metal parts with a light oil or silicone to prevent rust. 4. Store in a dry, clean area. OPTIONAL EQUIPMENT Hose Attachment Kit Model 290-204-000 is available as optional equipment. See figure 21. Hose Attachment Kit FIGURE 21. TROUBLE SHOOTING PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION Engine fails to start 1. Fuel tank empty, or stale fuel. 2. Spark plug wire disconnected. 3. Faulty spark plug. 1. Fill tank with clean, fresh fuel. 2. Connect wire to spark plug. 3. Clean, adjust gap or replace. Loss of power; operation erratic 1. Spark plug wire loose. 2. Unit running on CHOKE. 3. Blocked fuel line or stale fuel. 4. Water or dirt in fuel system. 5. Carburetor out of adjustment. 6. Dirty air cleaner. 1. Connect and tighten spark plug wire. 2. Move choke lever to OFF position. 3. Clean fuel line; fill tank with clean fresh gasoline. 4. Disconnect fuel line at carburetor to drain fuel tank. Refill with fresh fuel. 5. Adjust carburetor.f Engine overheats 1. Carburetor not adjusted properly. 2. Engine oil level low. 1. Adjust carburetor.f 2. Fill crankcase with proper oil. Too much vibration Loose parts or damaged crankshaft. Stop engine immediately and disconnec...

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