20
Cutting Blades
Periodically inspect the blade adapter and/or spindle for cracks or damage, especially if you strike a foreign object.
Replace immediately if damaged
.
Remove the blades following instructions below:
1.
Remove the deck from beneath the tractor, (refer to
Cutting
Deck Removal
on page 19) then gently flip the deck over to
expose its underside.
2.
Place a block of wood between the center deck housing
baffle and cutting blade to act as a stabilizer. See Figure 13.
3.
Use a 15/16" wrench, remove the hex flange nut that secures
the blade to the spindle assembly. See Figure 13.
4.
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° to 30°
angle. See Figure 13.
If cutting edge of the blade has already been sharpened to within
5/8" of the wind wing radius, or if any metal separation is present,
replace the blades with new ones. See Figure 13.
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.
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.
Changing the Deck Belt & PTO Belt
IMPORTANT:
The V-belts on your tractor are specially
designed to engage and disengage safely. A substitute (non-
OEM) V-belt can be dangerous by not disengaging
completely. For a proper working machine, use factory
approved belts.
All belts on the tractor are subject to wear and should be
replaced if cracking, shredding or rotting occurs. To change or
replace the deck belts on your tractor, proceed as follows:
•
Lower the deck by moving the deck lift lever into the
bottom notch on the right fender.
•
Remove the belt guards by removing the self-tapping
screws that fasten them to the deck.
42” Deck
•
Remove belt keeper rod from around the engine pulley.
•
Insert a 3/8”-drive ratchet wrench (set to
loosen
) into the
square hole found in the idler bracket on the left side of the deck’s surface. See Figure 14.
WARNING:
Shut tractor engine off, remove ignition key, disconnect the spark plug wire(s) and ground
against the engine before proceeding with job. Protect your hands by using heavy gloves or a rag to grasp
the cutting blade.
WARNING:
Shut tractor engine off, remove ignition key, disconnect the spark plug wire(s) and ground
against the engine before proceeding with job.
Spindle Assembly
Hex Flange Nut
Wood Block
Figure 13
Blade separation
Worn blade edge
Wind Wing
Sharpen edge evenly
5/8" minim
um
Belt Guard
Idler Bracket
3/
8
” S
q
uare
Hole
Figure 14
Summary of Contents for 13A4616G790
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