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Replacing the Deck Belt
1.
Set the parking brake. Remove ignition
key and both spark plug caps.
2.
Remove the deck, (refer to
Deck Removal).
3.
Remove the wing knobs (a) securing the
belt covers (b) to the deck. See Figure 4-14.
(a)
Figure 4-14
4.
The speed nut should hold the carriage
screw in place.
5.
Remove the belt from around the
pulleys. On 36" decks, a belt keeper rod
(a) will also need removed. Remove the
two bolts securing the belt keeper rod
(a) to the deck. See Figure 4-14.
(a)
Figure 4-15
WARNING
Avoid pinching injuries. Never place your fingers on
the idler spring or between the belt and a pulley while
removing the belt.
6.
Route the new belt as shown in Figure
4-15 for 36" decks and Figure 4-16 for 48"
and 54" decks. Then reinstall the deck.
Figure 4-16
Replacing the Blades
WARNING
Before performing any maintenance, disengage the
PTO, engage the parking brake lever, turn the ignition
key to the "OFF" position and remove the key from the
switch. Protect your hands by using heavy gloves when
handling the blades. When servicing the mower deck,
be careful not to cut yourself on the sharpened blades.
1.
Remove the deck as instructed in the
Deck Removal section.
(a)
2.
Jack up the front of the mowing deck about
one foot and block it in that position.
3.
Wrap a rag around one end of the blade
(a) and grasp it to prevent it from turning,
or secure the blade (a) by placing a block
of wood (b) between the blade (a) and
the deck housing (c). See Figure 4-17.
Figure 4-17
4.
Remove the flange lock nut (d) and flat
washer (e) at the blade (a) and remove
the blade.
5.
To replace the blade reverse the above
process and tighten nut to 90-110 ft-lbs.
Note: When replacing the blade, be sure
to install the blade with the side of the
blade marked ''Bottom'' or "Grass Side"
(or with a part number stamped in it)
facing the ground when the mower is in
the operating position.
WARNING
Never mow with dull blades. Blades that are bent should
be replaced. The cutting blades are sharp and can cause
severe injury. Wrap the cutting surface of the blade with
a rag to avoid injury.
Sharpening the Blades
1.
2.
3.
(c)
(b)
(d/e)
(a)
If a blade is bent or otherwise damaged, replace the blade
with a new one. Use only original equipment blades.
A poorly balanced blade will cause excessive vibration,
may damage the machine and/or result in personal injury.
4.
Use a torque wrench to tighten the blade spindle hex
flange nut to between 90-110 ft-lbs.
Set the parking brake.
Clean any debris from the blades. Keep
blades sharp and free of build up at
all times.
To properly sharpen the cutting blades,
remove equal amounts of metal from
both ends of the blades along the cutting
edges, parallel to the trailing edge, at a
25°-30° angle. Always grind each cutting
blade edge equally to maintain proper
blade balance. See Figure 4-18.
Figure 4-18
WARNING
WARNING
Test the blade's balance using a blade
balancer. Grind metal from the heavy
side until it balances evenly.
Note: When replacing the blade, be sure
to install the blade with the side of the
blade marked ''Bottom'' or "Grass Side"
(or with a part number stamped in it)
facing the ground when the mower is in
the operating position.
WARNING
S
4 — P
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