MTD Garden Tractors User Manual page 229

For Parts Call 606-678-9623 or 606-561-4983
c. Remove the two 5/16 inch bolts, lock washers
and nuts holding the blade to the adapter. See
Figure 8-35.
2. When sharpening the blades, follow the origi-
nal angle of grind as a guide. It is extremely
important that each cutting edge be ground
equally to prevent an unbalanced blade. An
unbalanced blade will cause excessive vibra-
tion when rotating at high speeds, may cause
damage to the mower and could break, caus-
ing personal injury.
8-23
www.mymowerparts.com
3. The blade can be tested for balance by balanc-
ing it on a round shaft screwdriver. Removal
metal from the heavy side until it balances
evenly.
4. When replacing the blade, be sure to install the
blade with the side of the blade marked "Bot-
tom" (or with part number) facing the ground
when the mower is in the operating position.
Blade Mounting Torque
3/8 Dia. Bolt 375 in-lb min., 450 in-lb max.
5/16 inch Dia. Bolt 150 in-lb min., 250 in-lb
max.
Blade Spindle Nuts
If disassembled for any reason, tighten the
blade spindle nuts between 80 and 100 foot
pounds.
To insure safe operation of your unit, all nuts
and bolts must be checked periodically for cor-
rect tightness.
8