Operator’s Manual Snow Boss 550 (H623D) Snow Boss 750 (H633E) 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 forestcovered, 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).
TABLE OF CONTENTS Content Page Important Safe Operation Practices................................................................... 3 Loose Parts........................................................................................................ 5 Assembling Your Snow Thrower........................................................................ 5 Know Your Snow Thrower ................................................................................. 7 Operating Your Snow Thrower....................
SECTION 1: IMPORTANT SAFE OPERATION PRACTICES This Warning 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 snow thrower. Failure to comply with these instructions may result in personal injury. When you see this symbol, heed its warning.
• • • • • • • • • • Use only attachments and accessories approved by the manufacturer of snow thrower (such as wheel weights, counter weights, cabs, etc.). Never operate the snow thrower without good visibility or light. Always be sure of your footing and keep a firm hold on the handles. Walk, never run. Muffler and engine become hot and can cause a burn. Do not touch. MAINTENANCE AND STORAGE • • • • Check shear bolts, engine mounting bolts, etc.
SECTION 2: LOOSE PARTS The snow thrower is shipped with following loose parts in the carton. Please remove all loose parts from the carton before discarding it. See Figure 1 to identify the parts noting that these parts may be referred to again in the following sections of this manual. Part numbers are shown in parentheses. Shear Bolts (710-0890A) Hex Lock Nuts (712-0429) AUGER SHEAR BOLTS The augers are secured to the auger shaft with two shear bolts and hex lock nuts.
NOTE: If the connector is not properly assembled, the shift rod will pivot and you will not be able to change speeds or change directions. • • Recheck the adjustment before retightening the jam nut against the cable. Skid Shoe Adjustment If not already attached, slip the cables that run from the handle panel to the chute into the cable guide located on top of the engine. See Figure 4.
Traction Control and Shift Lever Adjustment in need of adjustment and you should NOT operate the machine before completing the adjustment as follows: To check the adjustment of the traction control and shift lever, proceed as follows: • Loosen the jam nut on the traction control cable and UNTHREAD the cable one full turn. • Recheck the adjustment. • Retighten the jam nut to secure the cable when correct adjustment is reached.
Chute Directional Control The chute directional control is located on left side of the snow thrower. Primer Choke To change the direction in which snow is thrown, turn chute directional control as follows: • • Crank clockwise to discharge to the left. Crank counterclockwise to discharge to the right. Chute Tilt Control The distance snow is thrown can be adjusted by adjusting the angle of the chute assembly. Move the chute tilt control forward to decrease the distance, toward the rear to increase.
• • • • cover in the area of the control levers. Also, move control levers back and forth several times. Leave throttle control lever in the STOP or OFF position. Leave choke control in the FULL choke position. Move throttle control up to FAST position. Insert ignition key into slot. See Figure 8. Be certain it snaps into place. Do not turn the key. Rotate choke knob to FULL choke position (cold engine start). If engine is warm, place choke in OFF position instead of FULL.
• • Slightly overlap each previous cleared path. Follow the precautions found under the heading To Stop Engine to prevent possible freeze-up. • Clean the snow thrower thoroughly after each use. SECTION 6: MAKING ADJUSTMENTS Traction Control Adjustment WARNING: NEVER attempt to clean chute or make any adjustments while engine is running. Refer to the information found under the heading Final Adjustments in Section 3 of this manual to adjust the traction control.
Shift Rod Adjustment IMPORTANT: Make certain to check for correct adjustment of the shift rod as instructed under the heading Final Adjustments in Section 3 of this manual, before operating the snow thrower. To adjust the shift rod, proceed as follows. • Remove the hairpin clip and slide the connector up to separate the upper shift rod from the lower shift rod. See Figure 11. Drive Wheels The wheels may be adjusted for two different methods of operation.
Wheels Chute Directional Control • The spiral on the end of the chute directional control and the base of the discharge chute itself should be lubed with multi-purpose automotive grease once a season. See Figure 15. Oil or spray lubricant into plastic wheel bearings inside the wheel hubs at least once a season. Remove wheels, clean and coat axles with a multipurpose automotive grease. See Figure 13.
• • Reassemble new skid shoes with the six carriage bolts, bell washers (cupped side goes against skid shoes) and hex nuts. Make certain the skid shoes are adjusted to be level. To remove shave plate, remove the carriage bolts, belleville washers and hex nuts which attach it to the snow thrower housing. Reassemble new shave plate, making sure heads of the carriage bolts are to the inside of the housing. Tighten securely. Unhook the idler spring from the hex bolt on the auger housing. See Figure 19.
• • • Back out the stop bolt until the support bracket rests on the auger pulley. See Figure 20. Slip belt between friction wheel and friction wheel disc. See Figure 20. Remove and replace belt. Reassemble following the instructions in reverse order. Screws Friction Wheel Rubber Hub Screws NOTE: The support bracket must rest on the stop bolt after the new belt has been assembled. See Figure 20.
SECTION 9: TROUBLESHOOTING Problem Engine fails to start Cause 1. Fuel tank empty, or stale fuel. 2. 3. 4. 5. 6. 7. 8. Engine runs erratic Remedy 1. Fill tank with clean, fresh gasoline. Fuel becomes stale after thirty days unless a fuel stabilizer is used. Blocked fuel line. 2. Clean the fuel line. Choke not in ON position 3. Move switch to ON position Faulty spark plug. 4. Clean, adjust gap or replace. Safety key not in ignition switch on engine. 5. Insert the key fully into the switch.
SECTION 10: PARTS LIST Models 550 & 750 16
Models 550 & 750 4 17 11 9 16 13 8 15 1 10 14 5 18 6 3 7 12 2 Ref. No. Part No. 3 Part Description 1. 618-0123 2. 618-0418 LH Housing w/Fitting 3. 710-0642 Self Tapping Screw, 1/4-20 x .75 4. 711-1020 711-0908 Spiral Axle, 22” (550) Spiral Axle, 24” (750) 5. 714-0161 Hi-Pro Key, 3/16 x 5/8 6. 715-0143 Spring Spirol Pin, .25 x 1.25 7. 717-0528 Worm Gear, 20-tooth 8. 717-0526 Worm Shaft 9. 718-0186 Thrust Collar 10. 721-0325 Grease Plug 11.
Models 550 & 750 20 27 37 Drive Clutch Cable 39 20 5 13 7 38 37 Auger Clutch Cable 4 1 11 6 10 3 40 4 1 2 14 26 36 15 5 16 25 9 10 11 7 31 25 28 23 17 21 18 32 12 24 8 4 1 22 33 1 20 29 8 5 34 19 Auger Clutch Cable 26 35 Blower Housing 30 1 1 44 42 42 41 43 18
Models 550 & 750 Ref. No. Part No. Ref. No. Part Description Part No. Part Description 1. 710-1652 Hex Screw 24. 717-1444 7-Tooth Shaft 2. 784-5688 Drive Cable Guide Bracket 25. 715-0249 Roll Pin 3. 784-5687 Auger Clutch Cable Bracket 26. 714-0143 Clik Pin 4. 756-0625 Roller Cable 27. 684-0042B Friction Wheel Assembly 5. 738-0924 Hex Screw 1/4-28 28. 656-0012A Friction Disc Wheel 6. 684-0030 Frame Assembly 29. 684-0013B Wheel Shift Rod Assembly 7.
Models 550 & 750 2 3 1 4 5 11 10 9 15 18 14 12 7 8 13 32 6 31 9 18 19 20 16 22 31 43 23 27 21 10 13 30 34 28 25 23 18 13 38 26 43 35 31 22 30 18 32 31 16 41 37 33 36 17 39 40 24 40 42 39 29 20
Models 550 & 750 Ref. No. Part No. Ref. No. Part Description Part No. Part Description 1. 712-0116 Lock Jam Nut 3/8-24 24. 784-5618 Bearing Housing 2. 756-0178 Flat Idler 25. 710-0703 Carriage Screw 1/4-20 x .75 3. 784-5632A Auger Idler Arm 26. 710-0604 Hex Washer Screw 5/16-18 4. 710-0459A Hex Cap Screw 3/8-24 x 1.50 27. 736-0169 Lock Washer 3/8 5. 738-0281 Shoulder Screw 28. 712-0798 Hex Nut 3/8-16 6. 736-0174 Wave Washer 29. 741-0245 Hex Flange Bearing 7.
Models 550 & 750 1 2 28 3 8 9 11 13 5 4 27 10 12 15 16 4 22 7 6 20 23 14 24 18 17 26 19 25 21 22
Models 550 & 750 Ref. No. Part No. Part Description 1. 710-1652 Hex Washer Screw 1/4-20 x.625 2. 731-1324 Belt Cover 3. 732-0339 Extension Spring 4. 710-0627 Hex Screw 5/16-24 x .75 5. 710-3005 Hex Cap Screw 3/8-16 x 1.25 6. 05896A Drive Clutch Bracket 7. 748-0234 Shoulder Spacer 8. 756-0985 Pulley Half 9. 754-0343 V-Belt 10. 756-0984 Pulley Half 11. 736-0270 Bell Washer 12. 710-0230 Hex Cap Screw 1/4-28 x .50 13. 756-0313 Flat Idler 14.
Models 550 & 750 67 70 73 10 35 13 44 32 32 38 68 33 49 11 74 45 32 72 51 41 42 19 45 46 35 32 39 36 48 43 4 30 ground wire 71 (for of light ass’y) 18 34 41 54 44 69 62 47 27 55 37 43 11 11 23 29 A B 53 66 9 55 64 42 59 20 31 12 5 74 39 40 B A 15 63 65 28 21 60 24 59 6 16 25 1 26 52 4 20 12 54 18 58 61 15 7 20 11 56 55 2 17 12 57 8 24 3 14
Model 550 & 750 Ref. No. Part No. Ref. No. Part Description Part No. Part Description 1. 684-0008A Shift Arm Assembly 38. 732-0746 Torsion Spring, .44 x .8 2. 684-0022 Chute Crank Ass’y 39. 735-0199A Rubber Bumper 3. 715-0138 Rolled Pin 40. 736-0105 Bell Washer, .401 x .87 x .063 4. 710-0262 Carriage Bolt, 5/16-18 x 1.5 41. 736-0119 Lock Washer, 5/16 5. 710-0449 Carriage Bolt, 5/16-18 x 2.25 42. 736-0509 Special Washer, .35 x .72 x .13 6.
MANUFACTURER’S LIMITED WARRANTY FOR: The limited warranty set forth below is given by White Outdoor Products Co. with respect to new merchandise purchased and used in the United States, its possessions and territories. White Outdoor Products Co. warrants this product against defects in material and workmanship for a period of two (2) years commencing on the date of original purchase and will, at its option, repair or replace, free of charge, any part found to be defective in material or workmanship.
