MTD Series 660 Operator's Manual page 20

12" Drain
Hose
bil Drain
Valve
Figure 21
Fuel Filter
Your unit is equipped with a replaceable in-line fuel
filter. Replace filter whenever contamination or
discoloration is noticed. Order replacement filter
through your authorized engine service dealer.
CleaningEngineAnd Deck
Any fuel or oil spilled on the machine should be wiped
off promptly. Grass, leaves, and other dirt must not be
left to accumulate around the cooling fins of the engine
or on any part of the machine.
Clean the underside of the deck after each mowing.
We do not recommend the use of pressure washers or
garden hose to clean your unit. They may cause
damage to electric components, spindles, pulleys,
bearings or the engine. The use of water will result in
shortened life and reduce serviceability.
Cutting Blades
REMOVALFORREPLACEMENTORSHARPENING
WARNING:
Be sure to disconnect and
ground the spark plug wire(s) and remove
ignition key before working on the cutting
blade to prevent accidental engine starting.
Protect hands by using heavy gloves or a rag
to grasp the cutting blades.
Remove the hex flange nut which holds the blade to
the blade spindle.
Remove the blade from the spindle.
Sharpening
Remove the cutting blades by following the directions
of the preceding section.
When sharpening the blades, follow the original angle
of grind as a guide. It is extremely important that each
cutting edge receives an equal amount of grinding 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.
Reassembly
When replacing blades, 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. Carefully align "star" on blade
with "star" on spindle. Secure with hex flange nut.
Blade Mounting Torque
Hex Flange Nut: 840 in. lb. min., 1080 in. lb. max.
To ensure safe operation of your unit, all nuts and
bolts must be checked periodically for correct
tightness.
Battery CareAndMaintenance
Batteries are sealed and are maintenance free.
ChargingThe Battery
The engine is equipped with an alternator which
charges battery when tractor is operated. Under normal
conditions, the battery only needs to be charged before,
during and after off-season storage. Follow the
instructions under "Off-Season Storage."
To charge the battery: Battery P/N 725-1705D--
Charge at 2-3 amps for one hour. Battery P/N 725-
1707D, 725-0453G, and 725-1750_Charge at 6 amps
for one hour.
Removing/ Installing / Jump Starting
WARNING:
When removing or installing
the battery, follow these instructions to
prevent the screwdriver from shorting against
the frame.
Removing the Battery: Disconnect negative cable
first, then positive cable.
Installing the Battery: Connect positive cable first,
then negative cable.
Jump Starting
First, connect end of one jumper cable to the
positive terminal of the good battery, then the other
end to the positive terminal of the dead battery.
Connect the other jumper cable to the negative
terminal of the good battery, then to the FRAME OF
THE UNIT WITH THE DEAD BATTERY.
WARNING:
Failure to use this procedure
could cause sparking, and the gas in either
battery could explode.
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