MTD 3BA manual Replacing Belts, Servicing Augers, Drive Belt

Replacing Belts

NOTE: There are two belts on this snow thrower: auger belt and drive belt. It is recommended that both belts be replaced at the same time.

•Remove the spark plug wire from the spark plug and ground it against the engine.

•Drain gasoline from the gas tank, or place a piece of plastic sheet underneath the gas cap to prevent gasoline leakage.

•Remove the self-tapping screw shown in Figure 13, and press the plastic tabs to release the belt cover. Pull the belt cover out from around the engine and the chute assembly. Remove it away and save.

Belt Cover

Self-Tapping

Screw

Tab

Figure 13

Auger Belt

•Slip the front auger belt off the engine pulley pushing it down between the idler bracket and the engine pulley. See Figure 14.

•Squeeze the auger control to release tension on the auger belt; remove the belt.

•Replace with new belt after replacing the drive belt. Follow instructions below to replace the drive belt:

	Engine Pulley
Drive Belt	Auger Belt
	Auger Pulley
	Idler Bracket

Figure 14

Drive Belt

NOTE: Replace the drive belt before reassembling the new auger belt.

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

•Remove the spring that connects the transmission to a bolt on the engine frame. See Figure 15.

		Spring
Drive Pulley	Auger Pulley	Drive Belt
NOTE: Transmission shown pushed forward

Figure 15

•Pivot the transmission forward to release pressure on the drive belt. Remove from transmission pulley.

•Remove the drive belt from around the engine pulley, and away from the unit.

•Place the new drive belt into the groove on the engine pulley. See Figure 14.

•Tilt the transmission forward and position the drive belt on the drive pulley.

•Reconnect the spring to the bolt on the engine frame and secure the transmission.

•Reassemble the belt cover on the snow thrower.

Servicing Augers

The augers are secured to the spiral shaft with four shear pins and cotter pins. If you hit a foreign object or ice jam, the snow thrower is designed so that the pins may shear. Refer to Figure 12.

If the augers do not turn, check if the pins have sheared. Replace, if needed, with proper shear pins. refer to item 22 on page 18 for part number.

IMPORTANT: NEVER replace the auger shear pins with standard pins or fasteners. 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.

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