Craftsman 107.27768 User Manual download pdf (Page 20)

CLEAN DECK &

CHECK ! REPLACE MOWER BLADES

Service Interval: 25 hours or as required.

A 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.

A WARNING

For your personal safety, blade mounting

capscrews must each be installed with two spring

washers or a hex washer and spring washer, then

securely tightened. Torque blade mounting nut to

80 - 90 ft. lbs. (108 - 122 Nm).

1. Remove mower deck (see “Mower Deck Removal” in

the OPERATION section).

2. See Figure 18. Remove blade to inspect it or to safe

ly access the underside of the mower deck. Use a

block of wood to prevent blade rotation while loosen

ing the capscrew by turning it counterclockwise.

3. Remove the capscrew (D, Figure 20), spring washer

(C), hex washer (B), and blade.

4. 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.

6. Balance the blade as shown in Figure 19. Center the

blade’s hole 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.

7. Reinstall the blade with the lift wings (D, Figure 20)

pointing up toward the mower deck as shown.

8. Reinstall the spring washers (B, Figure 20) and nut

(C). Use a wooden block (A) to prevent blade rotation

while tightening the nut (C) to 80-90 ft. lbs. (108-122

Nm).

Figure 19. Balancing The Blade

A. 4x4 Wood Block

B. Spring Wshers

C. Blade Nut

D. Lift Wings

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Craftsman 107.27768 User Manual Page 20