Troy-Bilt TB-38 Benutzerhandbuch

The blades may be removed as follows.
1. 

Remove the deck from beneath the tractor, (refer to Cutting 

Deck Removal earlier in this section) then gently flip the deck 

over to expose its underside.

2. 

Place a block of wood between the center deck housing baffle 

and the cutting blade to act as a stabilizer. See Figure 7-5.

3. 

Remove the hex flange nut that secures the blade to the 

spindle assembly. See Figure 7-5.

4. 

To properly sharpen the cutting blades, remove equal amounts 

of metal from both ends of the blades along the cutting edges, 

parallel to the trailing edge, at a 25° to 30° angle.

If the cutting edge of the blade has already been 

sharpened to within 1 5⁄8” from the edge, or if any metal separation is 

present, replace the blades with new ones. See Figure 7-6.

1-5/8 in

ch

 

(min.)

If the cutting edge of the blade has 

previously been sharpened, or if any metal 

separation is present, replace the blades with new 

ones.

A poorly balanced blade will cause 

excessive vibration, may cause damage to the 

tractor and/or result in personal injury.

5. 

Test the blade’s balance using a blade balancer. Grind 

metal from the heavy side until it balances evenly.

NOTE: When replacing the blade, be sure to install the blade with 

the side of the blade marked ‘‘Bottom’’ (or with a part number 

stamped in it) facing the ground when the mower is in the 

operating position.

Use a torque wrench to tighten the 

blade spindle hex flange nut to between 70 lbs-ft 

and 90 lbs-ft.