Craftsman 107.289920 manual Blade Removal, Balancing the Blade

CLEAN DECK &

CHECK/REPLACE MOWER BLADES

Service Interval: 25 hours or as required.

WARNING

For your personal safety, do not handle the sharp mower blades with bare hands. Careless or

improper handling of blades may result in serious injury.

LOOSEN

WARNING

For your personal safety,	blade mounting	Figure 24. Blade Removal
capscrews must each be	installed with a	spring

washer, then securely tightened. Torque blade mounting capscrew to 45-55 ft-lbs(61-75 Nm).

1.Remove mower deck (see "Mower Deck Removal" in the OPERATION section).

2.Remove blade to inspect it or to safely access the underside of the mower deck (see Figure 24). Use a block of wood to prevent blade rotation while loosen- ing the capscrew by turning it counterclockwise.

3.Remove the capscrew (A, Figure 25), spring washer (B), and blade.

. Clean the underside of the mower deck.

5.Inspect the blades for nicks or dull edges. Use a file to sharpen blade to a fine edge. If the blade is dam- aged, it must be replaced.

. Balance the blade as shown in Figure 26. Center the blade'shole on a nail lubricated with a drop of oil. A balanced blade will remain level. If the blade is not balanced, continue to sharpen the heavy side until it balances.

. Reinstall the blade with the lift wings (C, Figure 25) pointing up toward the mower deck as shown.

. Reinstall the spring washer (B) and capscrew (A). Use a wooden block (B) to prevent blade rotation while tightening the capscrew (A) to 45-55 ft-lbs (61- 75 Nm). Turn capscrew clockwise to tighten.

Figure 25. Blade Installation

A. Blade Capscrew

B.Spring Washer

C.Lift Wings

D.4x4Wood Block

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7___ Workbench _ _................

Nail

Figure 26. Balancing the Blade

25