Troy-Bilt TB280ES Manuel D’Utilisation

An unbalanced blade will cause 

excessive vibration when rotating at high speeds. It 

may cause damage to mower and could break 

causing personal injury.

5. 

Lubricate the engine crankshaft and the inner surface of the 

blade adapter with light oil. Slide the blade adapter onto 

the engine crankshaft. Place the blade on the adapter 

such that the side of the blade marked “Bottom” (or with 

part number) faces the ground when the mower is in the 

operating position. Make sure that the blade is aligned and 

seated on the blade adapter flanges. See Fig. 7-1 inset.

6. 

Place blade bell support on the blade. Align notches on the blade 

bell support with small holes in blade.

7. 

Replace hex bolt and tighten hex bolt to torque: 450 in. lbs. min., 

600 in. lbs. max.

To ensure safe operation of your mower, periodically check the 

blade bolt for correct torque.

NOTE: Several components must be removed in order to change 

the mower’s belt. See an authorized Service Dealer to have your 

belt replaced.

When removing the cutting blade for 

sharpening or replacement, protect your hands with 

a pair of heavy gloves or use a heavy rag to hold the 

blade. 

Periodically inspect the blade adapter for cracks, especially if you 

strike a foreign object. Replace when necessary. Follow the steps 

below for blade service.
1. 

Disconnect spark plug boot from spark plug. Turn mower on its 

side making sure that the air filter and the carburetor are 

facing up.

2. 

Remove the bolt and the blade bell support which hold the 

blade and the blade adapter to the engine crankshaft. See 

Fig. 7-1.

3. 

Remove blade and adapter from the crankshaft. See Fig. 7-1.

4. 

Remove blade from the adapter for testing balance. Balance 

the blade on a round shaft screwdriver to check. Remove 

metal from the heavy side until it balances evenly. When 

sharpening the blade, follow the original angle of grind. 

Grind each cutting edge equally to keep the blade 

balanced.