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Operator’s Manual
Rear Tine
Tiller
21A-450 Series
IMPORTANT: Read safety rules and instructions carefully before operating equipment.
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting
applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective wo
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TABLE OF CONTENTS Content Page Important Safe Operation Practices................................................................... 3, 4 Loose Parts ...................................................................................................... 5 Assembling Your Tiller.......................................................................................6 Know Your Tiller................................................................................................. 8 Operating Your Til
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SECTION 1: IMPORTANT SAFE OPERATION PRACTICES WARNING: THIS SYMBOL POINTS OUT IMPORTANT SAFETY INSTRUCTIONS WHICH, IF NOT FOLLOWED, COULD ENDANGER THE PERSONAL SAFETY AND/OR PROPERTY OF YOURSELF AND OTHERS. READ AND FOLLOW ALL INSTRUCTIONS IN THIS MANUAL BEFORE ATTEMPTING TO OPERATE YOUR TILLER. FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY. WHEN YOU SEE THIS SYMBOL— HEED ITS WARNING. WARNING: The Engine Exhaust from this product contains chemicals known to the State o
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If situations occur which are not covered by this Never refuel unit indoors because flammable manual, use care and good judgment. Contact your vapors will accumulate in the area. dealer for assistance. Never store the machine or fuel container inside where there is an open flame or spark such as a gas hot water heater, space heater, clothes dryer or CHILDREN furnace. Tragic accidents can occur if the operator is not Never run your machine in an enclosed area as the alert to the p
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SECTION 2: LOOSE PARTS Handle Assembly Depth Stake Control Assembly Rod NOTE: Cable tie not shown. 5
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SECTION 3: ASSEMBLING YOUR TILLER IMPORTANT:This unit is shipped WITHOUT GASOLINE ATTACHING DEPTH STAKE ASSEMBLY or OIL. After assembly, see separate engine manual for Tip the tiller forward so it rests on front proper fuel and engine oil recommendations. counterweight. NOTE: Left and right is determined from the operator’s Raise the tine shield hinge flap assembly. Remove position, standing behind the tiller. "T" knob, flat washer and hex bolt from depth stake. Insert the depth stake
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NOTE: Do not overtighten clutch cable. Too much Slot Head Screw, tension may cause it to break. Nut, Flat Washers WARNING: Be certain to check the Internally Threaded clutch cable adjustment as instructed on Tube this page before operating the tiller. Secure clutch cable to handle using cable tie. Refer to Figure 7. Cut off excess end of cable tie. ATTACHING THE CONTROL ROD Remove hairpin clips from control rod, (rubber washers to remain on control rod). Plastic Fitting Ins
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Now move the shift lever to FORWARD (Wheels NOTE: A secondary cable adjustment is available if you Forward) position. Carefully engage the clutch by lifting reach the point that additional adjustment is needed. the clutch control bail against the handle. The wheels Remove the belt cover and move the hex nuts at the should spin. other end of the cable towards the end of the casing. Then readjust the hex nuts at the handle. If the wheels do not spin with the unit in forward, adjust by unthreading
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CLUTCH CONTROL BAIL DEPTH STAKE The clutch control bail is located below the handle. See The depth bar controls the tilling depth. Refer to Figure 7. Lifting the clutch control bail against the SECTION 5: OPERATING YOUR TILLER on this page. handle engages the wheel and tine drive mechanisms. HANDLE ADJUSTMENT NOTE: Never engage clutch lever while shifting. The handle may be adjusted to be raised or lowered in line with the tiller. To adjust the handle position loosen the handle height adjust
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TO OPERATE THE TILLER: Select the depth stake setting. Transport Start engine as instructed on page 9. Position Move gear selection handle to one of the forward Use This modes or reverse. Position Use the reverse tine drive when tilling virgin First Time ground, sod or hard soil. Use the forward tine Clevis drive when cultivating or tilling soft ground. Pin IMPORTANT: When using the forward tine drive, lower the depth stake (use a shallower tilling depth) to make certain the tines do
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• Remove the belt cover as described in the belt CARBURETOR ADJUSTMENT replacement section on page 12. Remove the hairpin clip and spring washer from the WARNING: If any adjustments are made idler pulley rod. See Figure 11. to the engine while the engine is running, Move the idler pulley rod to the lower hole in the (e.g. carburetor), disengage all clutches idler bracket. See Figure 11. and tines. Keep clear of all moving parts. Replace the spring washer and hairpin clip. Be careful of
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CLEANING THE TINE AREA Clean the underside of the tine shield after each use. Torx Screws Belt Cover The dirt washes off the tines easier if washed off immediately instead of after it dries. We do not recommend the use of pressure washers to clean your unit. They may cause damage to electric Hex Cap Nut components, spindles, pulleys, bearings, or the engine. Flat Washer The use of pressure washers will result in shortened life and reduce serviceability. BELT REPLACEMENT Self Tap CAUTION: Do
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SECTION 9: OFF-SEASON STORAGE If the tiller will not be used for a period longer than 30 Refer to the engine manual for correct engine days, the following steps should be taken to prepare the storage instructions. tiller for storage. Wipe tines with oiled rag to prevent rust. Store tiller in a clean, dry area. Do not store next to Clean the exterior of engine and the entire tiller corrosive materials, such as fertilizer. thoroughly. Lubricate the tiller as described in the lubricati
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SECTION 11: PARTS LIST FOR MODEL 450 SERIES 14
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MODEL 450 SERIES REF. REF. NO. PART NO. DESCRIPTION NO. PART NO. DESCRIPTION 1 611-0020 Wheel Shaft Ass’y: 33T 28 721-0378 Seal 1.0 Shaft 2 611-0021 Tine Shaft Ass’y: 18T 29 721-0379 Seal .75 Shaft 3 611-0128 Jack Shaft Ass’y 31 726-0277 Taper Cap Ring 4 611-0129 Input Shaft Ass’y 32 732-0496 Compression Spring .50" Lg. 5 617-0058 Rev. Idler Gear Ass’y: 30T 33 736-0163 Thrust Wash. 1.03" I.D. x 1.62" O.D. 6 617-0059 Ftine Idler Gear Ass’y: 30T 34 736-0351 Fl-Wash .76" I.D. x 1.5" O.D. 7 617-006
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MODEL 450 SERIES 12 15 67 70 2 12 22 70 69 60 61 68 12 5 17 10 23 18 19 7 20 1 8 3 14 11 6 60 16 61 4 62 9 37 34 27 25 64 21 30 39 38 63 27 26 36 32 33 31 46 29 42 66 26 30 49 44 41 30 24 44 26 40 28 35 50 59 51 65 58 53 55 56 54 57 16
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MODEL 450 SERIES REF. REF. NO. PART NO. DESCRIPTION NO. PART NO. DESCRIPTION 1 747-1152 Shift Rod 34 750-0885 Spacer .435 O.D. x .322 I.D. 2 649-0041 Upper Handle Ass’y 35 786-0090 Shoulder 3 649-0034 Lower Handle Ass’y 36 786-0113 Tine Shield Hinge Flap 4 710-3005 Hex Screw 3/8-16 x 1.25 37 786-0176 R.H. Handle Brkt. 5 710-3056 Hex Screw 5/16-18 x 3.25 38 786-0177 L.H. Handle Brkt. 6 711-0415 Clevis Pin 3/8-1.62 39 786-0178 Tine Shield 7 712-0379 Flange Lock Nut 3/8-24 40 786-0179 Tine Shield B
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MODEL 450 SERIES 18 27 46 45 12 9 19 26 24 6 17 18 10 25 14 2 28 11 13 20 15 44 7 3 40 21 22 4 23 5 43 42 16 41 39 35 38 37 36 33 37 32 34 31 30 29 18
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MODEL 450 SERIES REF. REF. NO. PART NO. DESCRIPTION NO. PART NO. DESCRIPTION 1 686-0111 Belt Cover Brkt. Ass’y 25 786-0064A Idler Bracket 2 710-0237 Hex Bolt 5/16-24 x .62" Lg. 26 786-0186 Belt Keeper Brkt. 3 710-0412 Hex Bolt 1/4-28 x .75" Lg. 27 786-0187 Shift Cover Brkt. 4 710-0502A Hex Wash.TT-Sems Screw 3/8-16 x 28 786-0193 Idler Belt Keeper 1.250" Lg. 29 634-0110 RH Wheel Ass’y Comp. 16.0 x 4.0 5 710-0591 Hex Bolt 3/8-24 x 1.00 634-0111 LH Wheel Ass’y Comp. 16.0 x 4.0 6 710-0599 Hex W
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MANUFACTURER’S LIMITED WARRANTY c. Routine maintenance items such as lubricants, filters, The limited warranty set forth below is given by MTD blade sharpening and tune-ups, or adjustments such PRODUCTS INC (“MTD”) with respect to new merchan- as brake adjustments, clutch adjustments or deck dise purchased and used in the United States, its posses- adjustments; and normal deterioration of the exterior sions and territories. finish due to use or exposure. d.MTD does not extend any warranty for pr
