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MAINTENANCE
A
WARNING: Disconnect the spark plug
wire(s) and ground against the engine
before
performing
any
adjustments,
repairs or maintenance.
TROUBLE SHOOTING
Refer to the chart on page 24 for trouble shooting
information.
ENGINE
Refer to the separate engine manual for engine
maintenance instructions.
Maintain
engine oil
as instructed in the separate
engine manual packed with your unit.
Read and
follow instructions carefully.
Service
air cleaner
every 25 hours under normal con¬
ditions. Clean every few hours under extremely dusty
condition. To service the air cleaner, refer to the sepa¬
rate engine manual packed with your unit.
The
spark plugs
should be cleaned and the gap reset
cnce a season. Spark plug replacement is recom-
nended at the start of each mowing season; check
angine manual for correct plug type and gap specifica-
ions.
CLEANING ENGINE AND DECK
^ny fuel or oil spilled on the machine should be wiped
)ff promptly. Grass, leaves, and other dirt must not be
illowed to accumulate around the cooling fins of the
ingine or on any part of the machine.
'lean the underside of the deck after each mowing.
JUTTING BLADES
WARNING: Protect hands by using heavy
gloves or a rag to grasp the cutting
blades.
he blades may be removed for sharpening or
splacement as follows:
6" Deck
lemove the hex flange nut that holds the blade to the
lade spindle. See figure 22A.
50" Deck
1. Remove the 3/8" bolt and lock washer holding the
blade and adapter to the blade spindle.
2. Remove the blade and adapter from the blade
spindle.
3. Remove the two 5/16" bolts, lock washers and
nuts holding the blade to the adapter. See figure
22B.
Both Decks
When sharpening the blades, follow the original 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 vibration when rotating at high speeds, may
cause damage to the mower and could break, causing
personal injury.
The blade can be tested for balance by balancing it on
a round shaft screwdriver. Remove metal from the
heavy side until it balances evenly.
When replacing the blade, be sure to install the blade
with the side of the blade marked "Bottom" (or with
part number) facing the ground when the mower is in
the operating position.
TORQUE SPECIFICATIONS
46" Deck:
Blade
Hex Flange Nut: 70 ft.-lbs., 90 ft.-lbs.
Blade Spindle Screws
If disassembled for any reason, tighten the blade spin¬
dle screws between 200 and 275 inch pounds.
50" Deck:
Blade
3/8" Dia. Bolt: 450 in. lb. min., 600 in. lb. max.
5/16" Dia. Bolt: 200 in. lb. min., 350 in. lb. max.
Blade Spindle Nuts
If disassembled for any reason, tighten the blade spin¬
dle nuts between 200 and 350 in. lbs.
To ensure safe operation of your unit,
all
nuts and
bolts must be checked periodically for correct tight¬
ness.
19
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