MTD 31AE993I401 manuale d’uso

33-inch Two Stage Snow Thrower Model 31AE993I401 PRINTED IN U.S .A. Oper ator’ s Man ual FORM NO . 770-10278D. fm (6/2003) IMPORT ANT : Read safety rules and instructions ca refully before oper ating equipment. Warning: This unit is equipped with an inter nal combustion engine and should n ot be used on or near any unimproved forest- covered, bru[...]

2 TABLE OF CONTENTS Content Page Important Safe Op eration Practic es .............. ............. ................ ............. ................ ........... 3 Assembling Your Snow Thro wer ................ ............. ................ ............. ................ ............. . 5 Know Your Sn ow Thrower ............... ............. ........[...]

3 SECTION 1: IMPORTANT SAFE OPERATION PRACTICES DANGER: This machine was built to be oper ated according to th e rules for safe operation in this manual. As with any type of power equipment, car elessness or error on the part of the operator can result in serious injury. This machine is capable of amputatin g hands and feet and throwing objects. Fa[...]

4 5. Never run an engine in doors or in a poo rly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas. 6. Do not operate machine while under the influen ce of alcohol or drugs. 7. Muffler and engine become hot and can ca use a burn. Do not touch. 8. Exercise extreme caution wh en operating on or crossing gravel surf[...]

5 SECTION 2: ASSEMBLING YOUR SNOW THROWER Unpacking • Remove staples from the top, sides, and ends of the shipping crate. Set panels aside to avoid ti re damage or personal injur y. • Remove and discard plastic bag th at covers unit. • Roll the unit out of the crate. • Check the crate for loose part s before discarding. Loose P arts • The[...]

6 Figure 3 • If not already a ttached, slip th e cables that ru n from the handle panel to th e discharge chute into the cable guide located on t op of the engine. See Figure 4. Figure 4 • Unwrap the headlight wire which is attach ed to the headlight, ben eath the handle panel. Wind the headlight wire a round the lower right handle unt il exces[...]

7 • Allow the auger to remain engaged for approximately ten secon ds before releasing the auger control. Repeat this several times. • With the engine run ning in the fast position and the auger control lever in the disengage d “up” position, walk to the fr ont of the machin e. • Confirm that th e auger has completely stopped rotating and [...]

8 SECTION 3: KNOWING YOUR SNOW THROWER • Compare the figure below with your equipment and be fam iliar with its controls before starting it. Figure 8 Traction Control / Auger Control Lock The traction control is located on the right hand le. Squeeze the tr action control to engage the wheel drive. Release to stop. This same lever also locks the a[...]

9 Chute Crank The chute crank is located on the left side of the snow throwe r. Use it to change the directio n in which snow is thrown. Avoid ta rgetting persons, animals or c ars and bu ildings. Chute Tilt Control The distance snow is thrown can be changed by adjusting the angle of the chute assembly. Move t he chute tilt control forw ard to d ec[...]

10 • Determine that your ho use wiring is a three-wire grounded system. Ask a licensed elect rician if you are not certain. If y our house wiring system is not a three-wire gr oun ded system, do not use this electric star ter under an y conditions. If y our home electrical syste m is grounde d, but a three-hole rec eptacle is n ot a vai lable, on[...]

11 Chute Clean-Out T ool The chute clean-out tool is conveniently fastened to the rear of the auger ho using with a moun ting clip. Never use your hand to clean a clogge d chute or chute opening; use this clean-out t ool instead. • Release bot h the auger cont rol lever and the traction/auger contro l lock lever. • Stop the engine by removing t[...]

12 • If you placed plastic film under the gas ca p earlier, remove it now. Figure 11 Auger Control Refer to instructio ns on page 6 to adjust the auger control. Ma ke certain to check f or correct a djustmen t as instructed before opera ting the snow thrower. Chute Assembly The distance snow is thrown can be adjusted by adjusting the an gle of th[...]

13 mechanism at least onc e a season . Use engi ne oil or a spray lubrica nt. Refer to Figure 11. IMPORT ANT : Avoid spillage of oil on rubber friction wheel and aluminum drive plate. Gear Shaft • Lubricate the ge ar shaft with 6-in-1 grease (pa rt number 737-01 70) at least once a season, or aft er every 25 hours of ope ration. Refer to Figure 1[...]

14 Friction Wheel Rubber Follow the instructions below to check the condition of the friction wheel ru bber every 25 hours of operation. • Remove the six self-tap ping screws from the frame cover underneath the snow thrower. • Visually inspect the fr iction wheel rubber for excessive wear, cracks, or loose fi t on the friction wheel drive hub. [...]

15 Replacing Belts • Disconnect the chute crank asse mbly at the discharge chut e end by removing the hairpin clip and the tw o flat washer s. • Remove the plastic belt cover, located near the engine, by removing t he three self-tapping screws and flat washer s that secure it. See Figure 17. Figure 17 • Remove the large shoulde r bolt and was[...]

16 Drive Belt • Unhook the exten sion spring from the belt cover plate. See Figure 21. • Remove drive belt from t he engine pulley and bottom driv e pulley. • Replace belt and reassemb le in reverse order. • Reassemble the two ha lves of the unit hooking the lower portion of the auger housing over the stationary shou lder bolts in the fr am[...]

17 . Figure 24 • Secure with the bell washer an d hex bolt removed earlier. • Secure the fra me cover with six self-tapping screws. Put the snow thro wer down to its normal operating posit ion. NOTE: If you placed plast ic film under the gas cap, be certain to remove it. SECTION 8: OFF-SEASON STORAGE • If unit is to be stored over 30 days, pr[...]

18 SECTION 9: TROUBLESHOOTING NOTE: For repairs beyond minor adjust ments listed above, contact the local dealer. Prob lem Cause Remedy Engine fails to start. 1. Fuel tank empty, or stale fuel . 2. Blocked fuel line. 3. Choke not in ON position 4. Faulty spark plug. 5. Safety key no t in ignition switch on en gine. 6. Spark plug wire disconnected. [...]

19 SECTION 10: PARTS LIST FOR MODEL 993I Ref. No. P ar t No. Description 1. 710-0276 Carriage Screw 2. 710-0458 Carriage Bolt 5/16-18 x 1.75” 3. 710-0805 Hex Bolt 5/16-18 x 1.5” 4. 710-0895 Hi-Lo Screw 1/4-14 x .75 ” 5. 710-3015 Hex Screw 1/4-20 x .75” 6. 712-0429 Hex Lock Nut 7. 712-3027 Hex Flange Lock Nut 8. 731-0846C Upper Chute 9. 731-[...]

20 Model 993I 1 1 2 3 4 5 4 5 19 19 19 19 6 6 7 7 8 9 9 10 21 13 29 11 22 24 31 17 27 23 15 26 21 15 14 25 16 18 22 11 20 15 12 28 30 15 23 13 21 33 32 32 A A A A 33 34 34 35 35 36 37 38 39 40 41 42 43 44[...]

21 Model 993I Ref. No. P ar t No. P ar t Description 1. 646-0012 Cable Assembly: Auger/Drive 2. 684-0053B Chute Crank Assembly 3. 705-5266 Chute Crank Bracket 4. 710-1879 Hex Screw 3/8-16 x .880” 5. 710-1878 Hex Screw3/8-16 x 1.75” 6. 710-0458 Carriage Bolt 5/16-18 x 1.75” 7. 710-0572 Carriage Bolt 5/16-18 x 2.5” 8. 710-0891 Shear Bolt 5/16[...]

22 24 29 29 30 20 39 1 3 2 4 5 5 5 7 6 59 25 25 40 42 8 18 31 59 25 43 27 13 17 13 9 14 25 26 34 34 26 32 14 14 21 21 16 10 23 12 13 35 11 37 25 13 19 13 33 25 14 41 28 15 36 38 44 45 46 47 14 25 49 52 50 53 54 55 56 51 48 58 57 60 NOTE: For painted parts , pl ease refer to the list of color codes below. Please add the applicable color code, whe re[...]

23 Model 993I Ref. No. P ar t No. P ar t Description 1. 05244A Bearing Housing 2. 618-0281A Bracket Assembly: Auger Break 3. 684-0090A Impeller Assembly: 16” 4. 710-0371 Hex Lock Bolt 5/16-18 x .875” 5. 710-0451 Carriage Bolt 5/16-18 x .750” 6. 710-0459A Hex Screw, Special 3/8-24 x 1.5” 7. 710-0528 Hex Screw 5/16-18 x 1.25” 8. 710-0726 AB[...]

24 Model 993I 81 83 82 65 10 16 17 80 17 64 76 14 64 6 17 17 7 46 36 14 77 26 50 63 68 43 36 8 46 37 43 68 25 2 33 73 4 14 77 26 50 63 30 42 3 13 54 23 40 5 35 69 12 75 27 51 72 58 22 34 62 22 21 34 47 29 31 48 67 78 19 41 48 31 79 62 13 29 47 53 56 21 66 30 13 49 62 44 32 61 1 15 31 48 18 51 27 38 52 60 55 17 74 39 57 20 11 59 32 44 71 45 28 38 52[...]

25 Model 993I Ref. No. Par t N o . Pa r t D e s c r i p t i o n 1. 05244A Bearing Housing 2. 618-0279 Dogg Assembly LH 3. 618-0280 Dogg Assembly RH 4. 618-0282D Shift Assembly 5. 618-0296A Friction Wheel Assembly* 6. 684-0117 Shift Rod Assembly 7. 684-0118 Actr. Bracket Assembly: Auger 8. 684-0119 Actr. Bracket Assembly: Drive 9. 684-0122 Sprocket [...]

26 Model 993I 6 15 10 6 15 5 2 11 13 17 4 14 16 12 8 1 3 3 13 7 9 20 19 18 14 22 21 23 24 26 25[...]

27 Model 993I Ref. No. P ar t No. Description 1. 07386 W asher 2. 684-0123A Belt Cover Brac k et Assembly 3. 710-0191 Hex Scre w 3/8-24 x 1.25” 4. 710-0237 Hex Scre w 5/16-24 x .625” 5. 710-0502A TT Sems Screw 6. 710-0607 TT Screw 5/16-18 x 0.5” 7. 710-1245 Hex Loc k Screw 5/16-24 x .875” 8. 712-01 16 Jam Nut 9. 714-0118 K ey 10. 731-2531 B[...]

MANUF A CTURER’S LIMITED W ARRANTY FOR: The limited warranty set forth below is given by MTD LLC with respect to new merchandise purchased and used in the United States, its poss essions and territo ries. MTD LLC warrants this product against defects for a period of two (2) years commencing on the date of original purchase and will, at its option[...]