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Yard-Man 604G Operator's Manual page 20

Auto drive lawn tractors

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IMPORTANT: Each cutting blade edge has to be ground equally to maintain proper blade balance. A poorly balanced
blade will cause excessive vibration, may damage the tractor and/or result in personal injury.
Hex Flange Nut
/
/
/
<
Worn _paration
Wind Wing
nirnurn
Sharpen edge evenly
Spindle Assembly
Figure 14
5.
Test the blade by balancing it on a round shaft screwdriver. Grind metal from the heavy side until it balances
evenly.
6.
When replacing the blade, be sure to install the blade with the side of the blade marked "Bottom" (or with a part
number stamped in it) facing the ground when the mower is in the operating position.
7.
Use a torque wrench to tighten the blade spindle hex flange nut to between 70 and 90 foot-pounds.
8.
Gently slide the cutting deck (from the right side) out from underneath the tractor.
: a sm:ssb DdveBelt
NOTE: It is recommended that both drive belts be replaced at the same time.
,
2.
Remove the cutting deck as instructed earlier in this section.
After disconnecting the battery cables, remove the battery and battery tray from beneath the seat.
Battery Tray
Drive belt (Lower)
Variable-Speed
Opening
Shift Lever
Pulley
Rear Idler Pulley
[]
Drive belt (Upper)
[J
/
/
I
if
II
II
I(_ II
II
\
\
\
\
Sin
Transmission
i
iBelt Keeper
%
%
Front Idler Pulley
Keeper Pins_ i
-_
I
I
p_l
c
¢- .......
i
Double-Idler Bracket ......
i
Engine Pulley
rq
uJ
Transmission
Pulley
Idler Pulley
Front of Tractor
NOTE: View shown from above tractor.
Figure 15
20

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604h