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13

Augers

The augers are secured to the spiral shaft with two 
shear bolts and hex lock nuts. If you hit a hard 
foreign object or ice jam, the snow thrower is 
designed so that the bolts may shear.
Refer to Figure 13.

If the augers will not turn, check to see if the bolts 
have sheared. Replacement shear bolts and hex 
lock nuts have been provided with the snow 
thrower. When replacing bolts, spray an oil 
lubricant into shaft before inserting new bolts.

IMPORTANT:

NEVER replace the auger shear bolts with 

standard hex bolts. Any damage to the auger gearbox 
or other components as a result of doing so will NOT be 
covered by your snow thrower’s warranty.

Shave Plate and Skid Shoes

The shave plate and skid shoes on the bottom of 
the snow thrower are subject to wear. They should 
be checked periodically and replaced when 
necessary.

To remove skid shoes, remove the four carriage 
bolts, cupped washers and hex nuts which attach 
them to the snow thrower. Reassemble new skid 
shoes with the four carriage bolts, cupped washers 
(cupped side goes against skid shoes) and hex 
nuts. See Figure 14.

Figure 14

Belt Removal And Replacement

Auger Belts

NOTE: It is necessary to remove both belts in order to
change either one. If changing just one belt, be certain
to check the condition of the other belt.

Remove the plastic belt cover at the front of the 
engine by removing the two self-tapping screws. 
See Figure 15.

Drain the gasoline from the snow thrower, or place 
a piece of plastic film under the gas cap.

Tip the snow thrower up and forward so that it rests 
on its auger housing.

Figure 15

Remove the six self-tapping screws from the frame 
cover underneath the snow thrower.

Roll the front and rear auger belts off the engine 
pulley. See Figure 16.

Unhook the idler spring from the hex bolt on the 
auger housing. See Figure 17.

Back out the stop bolt until the support bracket 
rests on the auger pulley.

NOTE: Loosening the six nuts that connect the frame to
the auger housing may aid in belt removal.

Figure 16

Lift the auger belt from the auger pulley, and slip 
belt between the support bracket and the auger 
pulley. Repeat this step for the front auger belt.

Replace the auger drive belts by following 
instructions in reverse order.

NOTE: If you placed plastic film under the gas cap, be
certain to remove it before operating the snow thrower.

Carriage

Skid Shoe

Hex Nuts

Shave Plate

Bolts

Skid Shoe

Self-Tapping
Screw

Belt Cover

Auger
Pulley

Drive
Pulley 

Drive
Belt

Idler
Pulley

Idler
Pulley

Auger
Belts

Frame

Summary of Contents for 31BH763G401

Page 1: ...d with a spark arrester meeting applicable local or state laws if any If a spark arrester is used it should be maintained in effective working order by the operator In the State of California the abov...

Page 2: ...py the model number and the serial number of the equipment in the space below ENGINE INFORMATION The engine manufacturer is responsible for all engine related issues with regards to performance power...

Page 3: ...ye shields during operation and while performing an adjustment or repair to protect your eyes Thrown objects which ricochet can cause serious injury to the eyes 3 Do not operate without wearing adequa...

Page 4: ...ed by the manufacturer e g wheel weights tire chains cabs etc 20 If situations occur which are not covered in this manual use care and good judgment Contact your dealer or telephone 1 800 800 7310 for...

Page 5: ...handle See Figure 2 Figure 2 Raise the upper handle assembly until it locks over the lower handle Look at the lower rear of snow thrower frame to be sure both cables are aligned with cable roller guid...

Page 6: ...chute tilt control forward to decrease the distance toward the rear to increase See Figure 5 Skid Shoe The position of the skid shoe is determined by the condition of the ground from where snow has t...

Page 7: ...ORTANT Do NOT attempt to turn the key Headlight The headlight is on whenever the engine is running Track Lock Lever The track lock lever is located on the right side of the snow thrower and is used to...

Page 8: ...engine is warm place choke in OFF position instead of FULL Push primer button two or three times If engine is warm push primer button once only NOTE Always cover vent hole in primer button when pushin...

Page 9: ...adjustment has been achieved Figure 7 Chute Clean out Tool The chute clean out tool is conveniently fastened to the rear of the auger housing with a mounting clip Should snow and ice lodge itself in...

Page 10: ...s follows To check the adjustment of the traction control clutch and shift lever proceed as follows With the engine off move the shift lever all the way forward to the highest speed With the traction...

Page 11: ...od as instructed under Final Adjustments in the Assembly Section before operating the snow thrower Skid Shoes The space between the shave plate and the ground can be adjusted See Figure 12 For close s...

Page 12: ...the seals could result Be sure the vent plug is free of grease in order to relieve pressure Auger Shaft At least once a season remove the shear bolts on the auger shaft Spray lubricant inside the sha...

Page 13: ...cessary to remove both belts in order to change either one If changing just one belt be certain to check the condition of the other belt Remove the plastic belt cover at the front of the engine by rem...

Page 14: ...underneath the snow thrower Remove the click pins which secure the wheels and remove the wheels from the axle Using a 7 8 wrench to hold the shaft loosen but do not completely remove the hex bolt and...

Page 15: ...carburetor by pressing upward on bowl drain located below the carburetor cover NOTE Fuel stabilizer is an acceptable alternative in minimizing the formation of fuel gum deposits during storage Do not...

Page 16: ...Stop the engine immediately and disconnect the spark plug wire Tighten all bolts and nuts If vibration continues have the unit serviced by an authorized service dealer Unit fails to propel itself 1 T...

Page 17: ...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 11 721 0327 Grease Seal 12 736 0351 Flat Washer 76 x 1 5 x 030 13 736 0369 Flat Wash...

Page 18: ...67 65 57 58 55 54 8 17 11 22 21 18 4 1 11 15 19 7 14 24 37 31 45 9 51 40 46 47 53 59 29 68 69 69 27 82 70 72 72 73 27 68 71 74 27 56 64 76 77 78 79 11 15 75 81 27 83 80 13 13 57 58 58 66 62 5 5 38 35...

Page 19: ...1 1313C Cable Guide Chute Tilt 41 731 1320 Upper Chute 43 736 0159 5 16 Washer 45 736 0506 Special Washer 46 746 0896 Control Cable 47 746 0901 Control Cable 48 741 0475 Plastic Bushing 49 736 0159 5...

Page 20: ...20 Model 31BH763G401 1 2 3 4 5 6 7 8 9 10 11 12 14 15 13 16 10 26 18 27 28 13 30 31 32 33 16 18 35 34 36 37 38 39 41 40 42 17 40 39 29 24 9 19 43 44 45 46 47 48 49 30 50 31 21 22...

Page 21: ...0451 Carriage Bolt 5 16 18 x 1 00 35 684 0065 Impeller Assembly 36 715 0114 Pin 37 618 0122A Gear Assembly Complete 28 38 605 5196A Spiral Assembly RH 28 39 736 0188 Flat Washer 40 741 0493A Flange B...

Page 22: ...22 Model 31BH763G401 1 1 2 3 4 5 6 7 4 8 9 10 11 12 13 14 15 16 17 18 19 19 16 16 16 20 21 22 23 24 25 26 27 28 29 30 31...

Page 23: ...Lock Jam Nut 3 8 16 16 756 0569 Pulley Half 17 736 0242 Bell Washer 18 736 0505 Flat Washer 19 754 0430B Belt 20 756 0967 Auger Pulley 21 736 0247 Flat Washer 3 8 x 1 25 OD 22 736 0331 Bell Washer 23...

Page 24: ...24 25 19 26 27 24 23 22 21 16 17 18 19 20 29 30 31 2 32 32 34 30 2 27 26 19 25 36 21 24 23 22 12 2 30 10 18 19 20 2 1 13 11 14 15 9 3 7 6 5 4 32 40 39 38 Models 31BH763G401 28 8 35 41 41...

Page 25: ...er 1 4 ID x 93 OD 24 741 1111 Hex Flange Bearing 25 710 0643 Hex Cap Screw 5 16 18 x 1 26 748 0234 Shoulder Spacer 27 710 0604A Tap Screw 5 16 18 x 625 28 684 0031 Frame Assembly 29 738 0924 Hex Screw...

Page 26: ...G401 1 2 6 3 10 12 7 8 5 4 9 13 15 14 17 16 19 20 22 22 20 19 28 21 18 21 18 15 13 14 29 31 32 30 30 32 34 37 38 36 23 35 27 39 11 40 41 42 44 43 45 51 46 47 48 52 46 53 51 54 55 54 50 16 17 49 37 56...

Page 27: ...Dogg Assembly 24 684 0024 Idler Axle Assembly 25 710 1231 Eye Bolt 5 16 18 x 3 26 784 5639 Track Side Plate 27 711 0911 Actuator Shaft 28 713 0233 Chain 29 618 0169A Track Steering Shaft Assy 30 683 0...

Page 28: ...such as lubricants filters blade sharpening tune ups brake adjustments clutch adjustments deck adjustments and normal deterioration of the exterior finish due to use or exposure d MTD LLC does not ex...

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