warranty, operator must maintain the snow thrower as instructed in this manual.

Some adjustments will have to be made periodically to maintain your unit properly.

All adjustments in the service and adjustments sections of this manual should be checked at least once each season.

Follow the maintenance schedule given below.

Periodically check all fasteners and hardware to make sure these are tight.

Carburetor

WARNING: If any adjustments are made to the engine while the engine is running (e.g. carburetor), keep clear of all moving parts. Be careful of heated surfaces and mufflers.

Minor carburetor adjustments may be required to compensate for differences in fuel temperature, altitude and load. Refer to the engine manual for instructions.

Lubrication

Gear Shaft

Lubricate the gear shaft with 6-in-1 grease (part number 737-0170) at least once a season, or after every 25 hours of operation. Refer to Figure 10.

IMPORTANT: Keep all grease and oil off the rubber friction wheel and drive plate.

Engine

Refer to the separate engine manual packed with your unit for all engine lubrication instructions.

Auger Shaft

At least once a season, remove the shear bolts from the auger shaft and spray lubricant inside the shaft. See Figure 12.

Vent Plug

Shear Bolts

Bearings

Figure 12

Discharge Chute

The base of the discharge chute and the spirals on the chute crank should be lubricated at least every 25 hours of use. Apply the lubricant under the base of the chute and where the spirals contact the discharge chute. See Figure 13.

Lube Under Chute Base

Chute Crank Spirals

 

Figure 13

Drive and Shifting Mechanism

At least once a season or after every 25 hours of operation, remove rear cover. Lubricate any chains, sprockets, gears, bearings, shafts, and the shifting mechanism at least once a season. Use engine oil or a spray lubricant. Avoid getting oil on rubber friction wheel and aluminum drive plate. Refer to Figure 10.

Gear Case

The gear case is lubricated with grease at the factory and it does not require checking. If disassembled for any reason, lubricate with 2 ounces of Shell Alvania grease EPR00, part number 737-0168. Before reassembling, remove old sealant and apply new sealant. See Figure 12.

IMPORTANT: Do not overfill the gear case, since damage to the seals could result. Be sure the vent plug is free of grease in order to relieve pressure.

Auger Bearings and Shaft

Every season lubricate the auger bearings and the bearings on the side of the frame with light oil. See to Figure 12.

Use oil or spray lubricant into the bearings at the wheels at least once a season. Remove the wheels, one side at a time, and clean and coat axles with multi- purpose automotive grease.

Lubricate the auger shaft at least once a season. To do this:

Remove the shear bolts on the auger shaft.

Oil or spray lubricant inside shaft.

Carefully spin the auger around by hand to disperse the lubricant.

Reinstall the shear bolts.

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Yard-Man 31AE993J401 manual Carburetor, Lubrication