Gravely 988100 - GR1336FX 사용자 설명서

GB - 24

NOTE: If mower is used under sandy soil conditions, 
replace blades when air lifts become eroded through at 
ends (Figure 18).

1. Turn the engine off. Remove the ignition key. 

Remove the ignition wire from the spark plugs.

2. Remove the bolts, lock washer, flat washers, and 

blades from the spindle shafts.

1. Put the blades, flat washers, lock washers, and 

the bolts back on the spindle shafts.

2. Tighten the bolts to a torque of 115-125 lbf-ft 

(156-169.5 N•m).

3. Replace ignition wire on spark plugs.

1. Remove mower blade from unit.

Discard mower blade if:

•

More than 1/2 in. (1.27 cm) of metal is removed.

•

Air lifts become eroded.

•

Blade is bent or broken.

2. Sharpen mower blade by removing an equal 

amount of material from each end of mower 
blade. DO NOT change angle of cutting edge or 
round the corner of the mower blade.

3. Check mower blade balance.

Slide mower blade on an unthreaded bolt. A 
balanced blade should remain in a horizontal 
position. If either end of mower blade moves 
downward, sharpen the heavy end until blade is 
balanced.

4. Install mower blade(s) on unit (See Mower Blades 

CAUTION: Use sturdy gloves or padding to 
protect hands when working with mower 
blades.

1. Cutting Edge
2. Air Lift Erosion

1

2

OT0792

Figure 18

DO NOT sharpen to this pattern

Sharpen to this pattern

DISCARD if more 
than 1/2 in. (1.27 cm)

CAUTION: DO NOT sharpen mower blades 
while on unit. An unbalanced mower blade 
will cause excessive vibration and eventual 
damage to unit. Check mower blade balance 
before reinstalling blades.

NEVER weld or straighten bent blades.