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MTD Snow Boss 750 manual

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Table of contents for the manual

  • Page 1

    IMPOR T ANT : Re ad saf ety rules and inst ructions carefu lly bef ore ope rati ng equipm ent. WHITE OUTDOOR PR ODUCTS COMP ANY . P .O . BO X 361 131 CLEVELAND , OH IO 44136-972 2 Sno w Boss 550 (H623D) Sno w Boss 750 (H633E) PRINTED IN U .S.A. Warning: This unit is equi pped with an internal combusti on engine and should not be used on or near any[...]

  • Page 2

    2 TABLE OF CONTENTS Cont ent Page Important Safe Ope ration Prac tices ................. ............. ............. ............. ........... 3 Loose Parts .. ............. ............. ............. .................... ............ ............. .................. 5 Assembl ing Your S now Thrower ................ ............. ............ ....[...]

  • Page 3

    3 SECTION 1: IMPORTANT SAFE OPERATION PRACTICES This Warni ng symbol points out importa nt safety ins tructi ons which, i f not followed , could endan ger the perso nal safety a nd/or prop erty of you rself and o thers. Read a nd follo w all ins tructio ns in this m anual before at temptin g to operate y our snow thr ower. Failure to c omply w ith [...]

  • Page 4

    4 • When cleaning, repairing, or inspecti ng, make certain the auger, impell er and all moving parts have stopped. Disconnect spark plug wire and keep away from plug to prevent accidental starting. • Do not run engine indoors, except when starting engine and transporting snow th r ower in or out of building. Open doo rs. Exhaust fumes are dange[...]

  • Page 5

    5 SECTION 2: LOOSE PARTS The snow thro wer is shippe d with foll owing loos e parts in the ca rton. Plea se remov e all loose p arts from t he carton before dis carding it. S ee Figure 1 to i dentify the pa rts not ing that these p arts may b e referred to ag ain in the following s ections of thi s manua l. Part numb ers are show n in parenthe ses.[...]

  • Page 6

    6 NOTE: If the conn ector i s not prop erly ass embled , the shift rod wi ll pivot a nd you wi ll not be ab le to cha nge speed s or chang e direc tions. • If not al ready att ached, sl ip the ca bles that r un from the handle pa nel to the chute i nto the ca ble guide loca ted on top of the e ngine. See F igure 4. Figure 4 • Unwrap the h eadli[...]

  • Page 7

    7 Traction Control and Shift Lever Adjustment To check the adjus tment of the tracti on control and sh ift leve r, procee d as foll ows: • Move the s hift lev er into si xth (6) po sitio n. a . W i t ht h et r a c t i o nc o n t r o l( r e f e rt oF i g u r e7i n Section 4 o f this manual) rel eased , gently push the sno w thrower forwa rd, then [...]

  • Page 8

    8 Chute Dir ectional Control The chute dir ectional co ntrol is l ocated on lef t side of the snow thrower. To chang e the direct ion in whi ch snow is thrown, turn chute di rectio nal cont rol as fol lows: • Cran k clockwis e to dis charge to th e left. • Crank counterc lockwi se to dis char ge to th e right . Chute T ilt Control The distanc e[...]

  • Page 9

    9 • Move thr ottle control u p to FAST pos ition. Inse rt ignit ion key int o slot. See F igure 8. Be c ertain it snaps int o place . Do not turn th e key. • Rotate c hoke knob t o FULL c hoke posi tion (col d engin e start). If eng ine is wa rm, pla ce choke i n OFF positio n instead of FULL . • Electr ic Start O nly: Con nect powe r cord to[...]

  • Page 10

    10 • Sl ightl y overlap e ach previo us cle ared pat h. • Follo w the precauti ons found unde r the heading To Stop En gine to prev ent possi ble fre eze-up. • Clean t he snow throw er thor oughly aft er each u se. SECTION 6: MAKING ADJUSTMENTS WARNING: N EVER attempt to clean chute or make any adjus tments while engine is running. Chute Asse[...]

  • Page 11

    11 Shift Ro d Adju stment To adjust the s hift rod, pr oceed as follo ws. • Remov e the hai rpin clip and s lide th e conne ctor up to separa te the upper sh ift rod from the lower shift rod. See F igure 11. Fig ure 1 1 • Pla ce shif t lever in six th (6) pos ition . • Rot ate t he shi ft arm co unte rclockwis e (fro m the operator ’s posi [...]

  • Page 12

    12 Wheels • Oil or spr ay lubr icant into pl astic whe el bearin gs inside the w heel hub s at least onc e a season. Remove whee ls, clean a nd coat axle s with a mu lti- pur pos e auto mot ive gr ease . See Fi gure 13. Fig ure 1 3 Auger S haft • At least o nce a sea son, r emove th e shear bolts o n the auger s haft. Oil or spray lubricant ins[...]

  • Page 13

    13 • Reass emble new skid shoes with th e six car riage bolts, bel l washe rs (cupped s ide goes ag ainst s kid shoe s) and hex nut s. Ma ke cer tain the sk id sh oes are adjusted to b e leve l. To remove shave pl ate, remov e the carriage bol ts, bellevi lle was hers and he x nuts wh ich attach i t to the snow throwe r hous ing. Reass emble n ew[...]

  • Page 14

    14 • Back ou t the stop bolt un til the suppo rt bracket rests on th e auger p ulley. Se e Figure 2 0. • Slip bel t between fri ction wheel a nd friction w heel disc. Se e Figure 20. Rem ove and repl ace belt. • Reasse mble follow ing the in structions in reverse order. NOTE: The suppo rt bracket mu st rest on the stop b olt after the new be [...]

  • Page 15

    15 SECTION 9: TROUBLESHOOTING Problem Cause Remedy Engine f ails to start 1. Fuel tank emp ty, or stale f uel. 2. Blocke d fuel li ne. 3. C hok e not i n ON posi tion 4. Faulty spark plug. 5. Safety ke y not in ign ition switch on e ngine. 6. Spark pl ug wire disconnec ted. 7. Primer butt on not b eing used pr oper ly. 8. Fu el shut -off val ve clo[...]

  • Page 16

    16 SECTION 10: PARTS LIST Models 550 & 750[...]

  • Page 17

    17 Ref. No. P ar t No. P art De scription 1. 618-0123 RH Housin g 2. 618-0418 LH Housing w/ Fitting 3. 710-0642 Self T apping Scre w , 1/4-20 x .75 4. 711-1020 711-0908 Spir al Axle, 22 ” (550) Spira l Axle , 24” (750) 5. 714-0161 Hi-Pro K ey , 3/16 x 5 /8 6. 715-0143 Spring Spirol P in, .2 5 x 1.25 7. 717-0528 Wo rm Gear , 20-tooth 8. 717-0526[...]

  • Page 18

    18 Models 550 & 750 1 1 2 3 4 4 5 5 6 4 7 7 8 9 10 10 11 11 12 1 5 13 14 15 16 17 18 1 19 20 21 22 23 24 25 25 26 28 29 26 1 1 30 31 32 33 34 8 35 Drive Clutch Cable Au ger Clu tch Cable Auger Clu tch Cable Blow er Housin g 36 20 20 37 37 38 39 40 27 41 42 42 43 44[...]

  • Page 19

    19 Models 550 & 750 Ref. No. P ar t No. P ar t Description 1. 710-1652 Hex Screw 2. 784-5688 Drive Cabl e Guide Bracket 3. 784-5687 Auger Clutch Cabl e Bracket 4. 756- 062 5 Roller C able 5. 738-0924 Hex Screw 1/4- 28 6. 684- 003 0 Frame A ssem bly 7. 741-0563 Ball Bearing 8. 736-0105 Bell Washe r 9. 712-0116 Lock Jam N ut 10. 741-0598 Hex Flan[...]

  • Page 20

    20 Models 550 & 750 1 2 3 4 5 6 7 8 9 10 11 12 14 15 13 16 10 9 18 19 20 21 22 23 13 25 23 22 26 18 27 28 13 30 30 31 32 31 32 33 16 18 35 34 36 37 38 39 41 40 42 17 40 39 29 24 43 31 18 31 43[...]

  • Page 21

    21 Models 550 & 750 Ref. No. P ar t No. P ar t Description 1. 712-0116 Lock Jam Nut 3/8 -24 2. 756-0178 Flat Idler 3. 784-5632 A Auger Idler Arm 4. 710-0459 A Hex Cap Screw 3 /8-24 x 1.50 5. 738-0281 Shoulder Scre w 6. 736-0174 Wave Wash er 7. 732-0611 Extension S pring 8. 712-3068 Hex Nut 5/16-1 8 9. 712-3010 Hex Nut 5/16-1 8 10. 736-0119 Lock[...]

  • Page 22

    22 Models 550 & 750 1 2 3 4 5 6 7 4 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28[...]

  • Page 23

    23 Models 550 & 750 Ref. No. P a r t N o.  P a r t Description 1.  71 0 -1652  He x Wash e r Scre w 1 /4- 2 0 x .625 2.  73 1 -13 2 4  Bel t Co v er 3.  73 2 -03 3 9  Ext e nsio n Spr i ng 4.  71 0 -06 2 7  He x Scr e w 5 / 16- 2 4 x . 7 5 5.  71 0 -30 0 5  He x Ca p Scr e w 3/ 8 -1 6 x 1. 2 5 6.  05 8 96A ?[...]

  • Page 24

    24 Models 550 & 750 9 23 29 24 1 26 28 18 7 12 20 6 21 15 A A 5 4 18 11 27 12 20 44 35 32 48 45 35 32 33 44 45 46 49 32 72 36 38 51 32 11 41 42 43 43 42 41 11 69 47 31 40 34 37 B B 54 62 55 66 59 53 63 64 59 55 65 60 4 54 52 61 55 56 57 8 68 13 10 73 67 19 70 39 39 12 17 2 15 20 11 25 3 14 16 (for gr ound wire 71 of light ass’ y) 58 30 74 74[...]

  • Page 25

    25 Model 550 & 750 Ref. No. P art No. Part Description 1. 684-0008A Shift Arm Assemb ly 2. 684-0022 Chute Crank As s’y 3. 715-0138 Rolled Pin 4. 710-0262 Carriage Bolt, 5/16 -18 x 1.5 5. 710-0449 Carriage Bolt, 5/16 -18 x 2.25 6. 710-0788 Self Tappi ng Scr ew, 1/4-2 0 x 1 7. 710-3008 Hex Cap Screw, 5/16 -18 x .75 8. 710-3015 Hex Cap Screw, 1/[...]

  • Page 26

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  • Page 28

    MANUF A CTUR ER’S LIMITED W ARRAN TY FOR: The l imit ed war ranty se t for t h bel ow is given by Wh ite O ut- door Produ cts Co . with respec t to new merch andis e pur- chas ed and use d in the Uni ted Stat es, its po sses sions an d territories. White Outd oor Produc ts Co . warr ants thi s product against def ects in material and w orkmanshi [...]