Craftsman 28986 Operation Manual - Page 24

Clean, Check/replace

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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. WARNING LOOSEN 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). Figure 23. Blade Removal 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 23). Use a block of wood to prevent blade rotation while loosening the capscrew by turning it counterclockwise. 3. Remove the nut (C, Figure 24), spring washers (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 damaged, it must be replaced. . Balance the blade as shown in Figure 25. 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. . Reinstall the blade with the lift wings (D, Figure 24) pointing up toward the mower deck as shown. . Reinstall the spring washers (B, Figure 24) 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 24. Blade Installation A. 4x4 Wood Block C. Blade Nut B. Spring Washers D. Lift Wings Workbench Nail Figure 25. Balancing The Blade 24

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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.
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.
Remove blade to inspect it or to safely access the
underside of the mower deck (see Figure 23).
Use a
block of wood to prevent blade rotation while
loosen-
ing the capscrew
by turning it counterclockwise.
3.
Remove the nut (C, Figure 24), spring washers
(B),
and blade.
.
5.
.
.
.
Clean
the
underside
of
the
mower deck.
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 25. 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.
Reinstall the blade with the lift wings (D, Figure 24)
pointing up toward the mower deck as shown.
Reinstall the spring washers
(B, Figure 24) 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).
LOOSEN
Figure
23.
Blade Removal
Figure 24.
Blade Installation
A. 4x4
Wood
Block
C. Blade Nut
B. Spring Washers
D. Lift Wings
Workbench
Figure 25. Balancing The Blade
Nail
24