Yard-Man 31AE553F401 Maintenance, Augers, Shave Plate and Skid Shoes, Replacing Belt, Auger Belts

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SECTION 10: MAINTENANCE

WARNING: Disconnect the spark plug wire and ground against the engine before performing any repairs or maintenance.

AUGERS

The augers are secured to the spiral shaft with two shear bolts and hex lock nuts. If you hit a foreign object or ice jam, the snow thrower is designed so that the bolts will shear. Lock nuts cannot be threaded onto a bolt by hand. This type of nut is used where vibration occurs.

If the augers do not turn, check to see if the bolts have sheared. Two replacement shear bolts (shown in inset here) and hex lock nuts have been provided with the snow thrower. When replacing bolts, spray an oil lubricant into shaft before inserting new bolts.

Shear Bolt

Shear Bolt Shave Plate

Figure 14

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.

Carriage

Bolt Skid

Shoe

Figure 15

1.Remove the four carriage bolts, belleville washers and hex nuts which attach skid shoes to the snow thrower on two sides. See Figure 15.

2.Reassemble new skid shoes with the four carriage bolts, belleville washers (cupped side goes against skid shoes) and hex nuts. Make certain the skid shoes are adjusted to be level.

3.To remove shave plate, remove the skid shoe and the rest of hardware including carriage bolts, belleville washers and hex nuts which attach shave plate to the snow thrower housing. For location of shave plate, see Figure 14.

4.Reassemble new shave plate, making sure heads of the carriage bolts are to the inside of the housing. Reinstall skid shoe. Tighten securely.

REPLACING BELT

WARNING: Disconnect the spark plug wire from the spark plug and ground.

Auger Belts

1.Remove the plastic belt cover on the front of the engine by removing the two self-tapping screws. See Figure 16.

Remove belt cover

Figure 16

2.Disconnect chute crank assembly at the discharge chute by removing the hairpin clip and the two flat washers. See Figure 17.

Remove hairpin clip, flat washer

flat washer

Figure 17

3.Remove the six hex nuts and lock washers which attach the auger housing assembly to the frame assembly. See Figure 18.

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Contents MTD Products INC. P.O. BOX 368022 CLEVELAND, Ohio Important Read Safety Rules and Instructions CarefullyTraining Important Safe Operation PracticesPreparation OperationSafety Labels found on your unit Maintenance and StorageCalling Customer Support Finding Snow Thrower Model NumberUnpacking the Snow Thrower SET-UP Instructions Auger Drive Clutch Final AdjustmentsSkid Shoe Traction Drive Clutch and Shift LeverControls GAS and OIL FILL-UP OperationTo Start Engine To Stop EngineTo Steer Snowthrower To Engage DriveTo Engage Augers Tire PressureAdjustments Lubrication Augers MaintenanceShave Plate and Skid Shoes Replacing BeltAuger drive belt from the front auger pulley Drive Belt Changing Friction Wheel RubberOFF-SEASON Storage Trouble Possible Causes Corrective Action Trouble Shooting GuideRepair Parts Ref. No Codes below. Please add the applicable color code Cable Guide Page 151 2732 Yard-Man Green Yard-Man Yellow0674 Powder Black Wheel Assembly Yard-Man Green Yard-Man Yellow 0674 Powder Black 0637 Tire Chain Part Number Optional PartsOther Warranties MANUFACTURER’S Limited Warranty for

31AE553F401, 31AE573H401 specifications

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