BLADE MOUNTING TORQUE

Center Bolt: 450 in. lbs. min., 600 in. lbs. max.;

Blade Adapter Bolts (if applicable): 200 in. lbs. min., 350 in. lbs. max.

To ensure safe operation of your unit, all nuts and bolts must be checked periodically for correct tightness.

DECK

Belt Replacement

Disconnect the spark plug wire and ground it against the engine.

1.Drain the fuel tank or place a piece of plastic beneath the cap to prevent gasoline leakage.

2.Remove the transmission belt cover by removing the three bolts. See Figure 16.

3.Tip the mower back on its side. Block securely.

The underside of the mower deck should be cleaned after each use to prevent a buildup of grass clippings, leaves, dirt or other matter. If this debris is allowed to accumulate, it will invite rust and corrosion, and may cause an uneven discharge of grass clippings at the next cutting.

The deck may be cleaned by tilting the mower and scraping clean with a suitable tool (make certain the spark plug wire is disconnected).

ENGINE

Refer to the separate engine manual for engine maintenance instructions.

Maintain engine oil as instructed in the separate engine manual packed with your unit. Read and follow instructions carefully.

Hex Bolt

Transmission Belt Cover

Hex Bolts

Transmission

Service air cleaner every 25 hours under normal conditions. Clean every few hours under extremely dusty conditions. Poor engine performance and flooding usually indicates that the air cleaner should be serviced. To service the air cleaner, refer to the separate engine manual packed with your unit.

The spark plug should be cleaned and the gap reset once a season. Spark plug replacement is recom- mended at the start of each mowing season; check engine manual for correct plug type and gap specifi- cations.

Clean the engine regularly with a cloth or brush. Keep the cooling system (blower housing area) clean to permit proper air circulation which is essential to engine performance and life. Be certain to remove all grass, dirt and combustible debris from muffler area.

REAR FLAP REPLACEMENT

The rear flap is attached to the back of the mower deck, and is designed to minimize the possibility that objects will be thrown from the rear of the mower toward the operator. If the rear flap becomes dam- aged, replace as follows.

To remove the old rear flap, remove the three hex screws and the retaining plate. Attach the new rear flap with the retaining plate hex screws previously removed.

Self-Tapping

Screws

Figure 16

4.Remove the center bolt which secures the blade to the crankshaft. See Figure 17.

Remove Bolt

Inside

Belt

Guard

Remove

Center

Bolt

Remove Bolt

Figure 17

5.Remove the blade, the blade adaptor, and the pulley half. Remove the belt.

6.Using a 3/8” wrench, remove the two self- tapping screws which hold the inside belt cover, and remove the cover. See Figure 17.

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Yard Machines 520, 330, 230 manual Blade Mounting Torque, Deck, Engine, Rear Flap Replacement