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10

SECTION 6:  MAINTAINING YOUR SNOW THROWER

Replacing Belt

Remove the belt cover by removing five hex 
screws. See Figure 12.

Figure 12

Pull up on the idler pulley and slip the belt off the  
engine pulley. 

Push down on the idler pulley and slip the belt off 
the auger pulley. 

Reassemble new belt. See Figure 13.

Reinstall the belt cover.

Figure 13

Replacing Shave Plate 

The shave plate is attached to the bottom of the auger 
housing and is subject to wear. It should be checked 
periodically. There are two wearing edges and the 
shave plate can be reversed. See Figure 14.

Remove the four carriage bolts and hex lock nuts 
which attach it to the snow thrower housing.

Install new shave plate, making sure the heads of 
the carriage bolts are on the inside of the housing.

Adjust the shave plate according to instructions on 
page 9. Tighten securely.

Figure 14

Engine 

Refer to the separate engine manual for all engine 
maintenance procedures.

Check engine and snow thrower frequently for 
loose hardware, and tighten as needed.

Lubrication 

Lubricate pivot points on the control handle and the 
extension spring at the end of the clutch cable  with 
a light oil once every season and before storage of 
the snow thrower at the end of the season.

Lubricate the flange keepers on the chute crank 
once a season with a light oil making sure the crank 
rod moves freely. Remove bolts holding the shroud 
to the housing, and lift shroud to access the chute 
crank bracket.

WARNING: 

Before servicing, repairing, or 

inspecting, disengage all clutch levers and stop 
engine. Wait until all moving parts have come 
to a complete stop. Disconnect spark plug wire 
and ground it against the engine to prevent 
unintended starting.

Hex 
Screw

Hex Screw

Belt Cover

Auger

Pulley

Idler Pulley

Engine

Pulley

Drive
Belt

Remove these hardware

Shave
Plate

Summary of Contents for Snow Boss 721

Page 1: ...ster 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 above is required by la...

Page 2: ...te is explained below For future reference please copy the model number and the serial number of the equipment in the space below ENGINE INFORMATION The engine manufacturer is responsible for all engi...

Page 3: ...ector housing height to clear gravel or crushed rock surfaces 6 Disengage all clutch levers before starting the engine 7 Never attempt to make any adjustments while engine is running except where spec...

Page 4: ...Disengage all clutch levers and stop engine Wait until the auger impeller come to a complete stop Disconnect the spark plug wire and ground against the engine to prevent unintended starting before cle...

Page 5: ...the lower chute crank Insert the upper chute crank into the lower chute crank and align the holes Re insert the hairpin clip into the hole to secure the two chute cranks See Figure 2 Figure 2 Attachin...

Page 6: ...per handle the auger control handle is used to engage and disengage the auger The snow thrower is designed to propell by the rotation of the auger Pull the control handle back against the upper handle...

Page 7: ...rate engine manual packed with your snow thrower To Start Engine Insert ignition key into slot Turn key to ON position Now follow the instructions below as it pertains to your unit Electric Starter Fi...

Page 8: ...for several seconds The unusual sound made by spinning the starter will not harm engine or starter Disconnect the power cord from receptacle first and then from switch box Recoil Starter With engine...

Page 9: ...handle provides adjustment for belt tension To adjust disconnect the Z end of control cable from the bottom hole in the control handle See Figure 10 Hook the cable into the upper hole in control hand...

Page 10: ...ructions on page 9 Tighten securely Figure 14 Engine Refer to the separate engine manual for all engine maintenance procedures Check engine and snow thrower frequently for loose hardware and tighten a...

Page 11: ...spark plug 5 Clean spark plug readjust gap or replace 6 Prime engine four times 7 Wait at least ten minutes before starting Engine runs erratic 1 Unit running on choke 2 Fuel line blocked or stale fue...

Page 12: ...MODEL SNOW BOSS 721 15 9 21 6 6 21 6 21 4 20 16 24 14 17 23 3 8 22 10 13 2 1 25 60 7 18 11 11 19 12 5 5 5 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 33 41 42 43 44 45 46 47 48 49 50 42 49 51 52 53...

Page 13: ...riage Bolt 32 710 0642 TT Screw 1 4 20 x 0 75 33 710 0773 TT Screw 3 8 16 x 0 5 34 710 0896 AB Screw 1 4 14 x 0 625 35 710 1005 B Screw 1 4 14 x 0 5 36 711 0848A Axle Tube 37 712 0116 Jam Lock Nut 38...

Page 14: ...s Tank 19 751 0603 Fuel Cap 20 754 0101A V Belt 21 756 0416B V Pulley Half 22 756 0475 Pulley 23 784 0322 Engine Mount 24 784 0323 Support Bracket 25 784 0374 Support Plate Engine Mount Ref No Part No...

Page 15: ...0451 Carr Bolt 5 16 18 x 0 750 3 710 3015 Hex Screw 1 4 20 x 0 75 4 712 3027 Lock Nut 5 712 3068 Hex Lock Nut 6 720 0284 Hand Knob 7 731 0851A Flange Keeper Chute 8 731 0915B Lower Chute 9 731 0921 Up...

Page 16: ...these items b Routine maintenance items such as lubricants filters blade sharpening and tune ups or adjustments such as brake adjustments clutch adjustments or deck adjustments and normal deteriorati...

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