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MTD LT31S - page 1
Operator’ s Manual L T31S 2-Cycle Petr ol T rimmer IMPORT ANT : READ SAFETY RULES AND INSTRUCTIONS CAREFULL Y P/N 769-01661 (2/05) ...
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MTD LT31S - page 2
2 INTRODUCTION T ABLE OF CONTENTS Service Information . . . . . . . . . . . . . . . . . . . . . . . . .2 Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . .3 Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . .7 Oil and Petrol Information . . . . . ...
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MTD LT31S - page 3
3 RULES FOR SAFE OPERA TION SYMBOL MEANING The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols, and their explanations, deserve your careful attention and understanding. The safety warnings do not by themselves eliminate any danger. The instructions or warnings they give are not substitutes for proper ...
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MTD LT31S - page 4
4 RULES FOR SAFE OPERA TION • Add fuel in a clean, well-ventilated outdoor area where there are no sparks or flames. Remove the fuel cap slowly, and only after the engine stops. Do not smoke while fueling or mixing fuel. Wipe up any spilled fuel from the unit immediately. • Avoid creating a source of ignition for spilled fuel. Do not start the ...
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MTD LT31S - page 5
5 SAFETY AND INTERNA TIONAL SYMBOLS This operator's manual describes safety and international symbols and pictographs that may appear on this product. Read the operator's manual for complete safety, assembly, operating and maintenance and repair information. RULES FOR SAFE OPERA TION SYMBOL MEANING • SAFETY ALERT SYMBOL Indicates danger ...
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MTD LT31S - page 6
6 KNOW YOUR UNIT APPLICA TIONS As a trimmer: • Cutting grass and light weeds • Edging • Decorative trimming around trees, fences, etc. KNOW YOUR UNIT Fuel Cap Throttle Control D-Handle Shaft Grip Primer Bulb Blue Choke Lever Air Filter/Muffler Cover Shaft Tube Starter Rope Grip Line Cutting Blade Muffler On/Off Stop Control Cutting Attachment ...
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MTD LT31S - page 7
7 ASSEMBL Y INSTRUCTIONS Fig. 2 INST ALL AND ADJUST THE D-HANDLE 1. Push the D-handle down onto the shaft housing so that the handle slants towards the shaft grip (Fig. 1). The squared bolt hole in the handle is to the right. 2. Insert the shoulder bolt into the squared hole in the handle and push through. On the left side of the handle, place the ...
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MTD LT31S - page 8
8 OIL AND PETROL INFORMA TION NOTE: Dispose of the old petrol/oil mix in accordance to Federal, State and Local regulations. OIL AND PETROL MIXING INSTRUCTIONS Old and/or improperly mixed fuel are the main reasons for the unit not running properly. Be sure to use fresh, clean unleaded petrol. Follow the instructions carefully for the proper petrol/ ...
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MTD LT31S - page 9
9 ST ARTING/STOPPING INSTRUCTIONS Fig. 6 Starting Position Start/On (I) Stop/Off (O) Starter Rope Throttle Control Fig. 8 Fig. 7 Blue Choke Lever Position 1 Position 3 Position 2 Primer Bulb Operate this unit only in a well- ventilated outdoor area. Carbon monoxide exhaust fumes can be lethal in a confined area. W ARNING: Avoid accidental starting. ...
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MTD LT31S - page 10
10 OPERA TING INSTRUCTIONS NOTE: Do not rest the Bump Head™ on the ground while the unit is running. Some line breakage will occur from: • Entanglement with foreign matter • Normal line fatigue • Attempting to cut thick, stalky weeds • Forcing the line into objects such as walls or fence posts TIPS FOR BEST TRIMMING RESUL TS • Keep the ...
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MTD LT31S - page 11
11 MAINTENANCE AND REP AIR INSTRUCTIONS MAINTENANCE SCHEDULE Perform these required maintenance procedures at the frequency stated in the table. These procedures should also be a part of any seasonal tune-up. NOTE: Some maintenance procedures may require special tools or skills. If you are unsure about these procedures take your unit to any non-roa ...
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MTD LT31S - page 12
12 MAINTENANCE AND REP AIR INSTRUCTIONS Fig. 19 Fig. 15 NOTE: SplitLine™ can only be used with the inner reel with the slotted holes. Single line can be used on either type of inner reel. Use Figure 15 to identify the inner reel you have. NOTE: Always use the correct line length when installing trimming line on the unit. The line may not release ...
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MTD LT31S - page 13
13 MAINTENANCE AND REP AIR INSTRUCTIONS AIR FIL TER MAINTENANCE Removing the Air Filter/Muffler Cover 1. Place the blue choke lever in Position 2 (Fig. 21). NOTE: The blue choke lever must be in Position 2 to remove the air filter/ muffler cover. 2. Remove the four (4) screws securing the air filter/muffler cover (Fig. 21). Use a T-20 Torx bit scre ...
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MTD LT31S - page 14
14 MAINTENANCE AND REP AIR INSTRUCTIONS CARBURETOR ADJUSTMENT The idle speed of the engine is adjustable through the air filter/muffler cover (Fig. 27). NOTE: Careless adjustments can seriously damage your unit. An authorized service dealer should make carburetor adjustments. Check Fuel Mixture Old and/or improperly mixed fuel is usually the reason ...
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MTD LT31S - page 15
15 MAINTENANCE AND REP AIR INSTRUCTIONS Clean Air Filter The condition of the air filter is important to the operation of the unit. A dirty air filter will restrict air flow and change the air/fuel mixture. This is often mistaken for an out of adjustment carburetor. Check the condition of the air filter before adjusting the idle speed screw. Refer ...
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MTD LT31S - page 16
16 MAINTENANCE AND REP AIR INSTRUCTIONS CLEANING Use a small brush to clean off the outside of the unit. Do not use strong detergents. Household cleaners that contain aromatic oils such as pine and lemon, and solvents such as kerosene, can damage plastic housing or handle. Wipe off any moisture with a soft cloth. STORAGE • Never store a fueled un ...
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MTD LT31S - page 17
17 TROUBLESHOOTING If further assistance is requir ed, contact your authorized service dealer . CAUSE ACTION Cutting attachment bound with grass Stop the engine and clean cutting attachment Cutting attachment out of line Refill with new line Inner reel bound up Replace the inner reel Cutting head dirty Clean inner reel and outer spool Line welded D ...
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MTD LT31S - page 18
18 SPECIFICA TIONS ENGINE* DRIVE SHAFT and CUTTING A TT ACHMENT* *All specifications are based on the latest product information available at the time of printing. We reserve the right to make changes at any time without notice. Engine Type.............................................................................................................. ...
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MTD LT31S - page 19
19 NOTES ...
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MTD LT31S - page 20
20 NOTES ...
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