Mtd Snow Boss 550 User Manual download pdf (Page 14)

• 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.

NOTE:

The support bracket must rest on the stop bolt

after the new belt has been assembled. See Figure 20.

Servicing Friction Wheel Rubber

The rubber on the friction wheel is subject to wear and

should be checked after 25 hours of operation, and

periodically thereafter. Replace the friction wheel

rubber if any signs of wear or cracking are found.

• Drain the gasoline from the snow thrower.

• Tip the snow thrower up and forward, so that it rests

on the housing.

• Remove six self-tapping screws from the frame

cover 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 nut and bell

washer on the left end of gear shaft. See Figure 21.

Figure 21

• Lightly tap the hex nut to dislodge the ball bearing

from the right side of frame before removing the hex

nut and bell washer from left end of shaft.

• Move the gear shaft to the right and slide the friction

wheel assembly from the shaft.

• Remove the six screws from the friction wheel

assembly (three from each side). Remove the

friction wheel rubber from between the friction

wheel plates. See Figure 22.

Figure 22

• Reassemble new friction wheel rubber to the

friction wheel plates and hub, tightening the six

screws in rotation and with equal force.

• Position the friction wheel assembly up onto the pin

of the shift rod assembly, and slide the shaft

through the assembly. Reassemble in reverse

order.

Augers

Theaugersaresecuredtothespiralshaftwithtwo

shear bolts and hex lock nuts. Refer to Figure 14. If you

hit a foreign object or ice jam, the snow thrower is

designed so that the bolts mayshear. If the augers will

not turn, check to see if the bolts have sheared.

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

coved by your snow throwers warranty.

Off-season Storage

WARNING: Never store engine with fuel in

tank indoors or in poorly ventilated areas,

where fuel fumes may reach an open

flame, spark or pilot light as on a furnace,

water heater, clothes dryer or other gas

appliance.

• Ifunitistobestoredover30days,prepareengine

for storage as instructed in the separate engine

manual packed with your unit.

• Remove all debris from the exterior of the engine

and equipment.

• Follow the lubrication recommendations found in

Section 7 of this manual.

• Always store the snow thrower in a clean, dry area.

NOTE:

When storing any type of power equipment in

an unventilated or metal storage shed, care should be

taken to rust proof the equipment. Using a light oil or

silicone, coat the equipment, especially any chains,

springs, bearings and cables.

Hex Nut /

Bell Washer

NOTE:

Snow thrower shown resting on its

auger housing. Wheels not shown for clarity.

Friction Wheel Rubber

Screws

Friction Wheel Plates

Hub

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 27 28

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Mtd Snow Boss 550 User Manual Page 14

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