Check Fluid Level - Yard Machines 668 Operator's Manual

Optional Oil Drain Valve
Your lawn tractor may have a valve installed on the
engine for draining oil from the crankcase. See
Figure 24. To drain the oil, insert the 12" hose
(shipped loose with your unit) over the end of the
valve. Place the other end in a suitable container.
Push in black cap, rotate counterclockwise and pull
valve open. When oil is completely drained, push
top of valve in and rotate clockwise to close.
12" Drain
Hose
Drain_
Valve
Figure 24
FUEL FILTER
Your unit is equipped with a replaceable in-line fuel
filter. Replace filter whenever contamination or
discoloration is noticed. Order replacement tilter
through your authorized engine service dealer.
CLEANING ENGINE AND 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 coo_ing
fins of the engine or on any part of the machine.
Clean the underside of the deck after each mowing.
CUTTING BLADES
A. REMOVAL FOR
SHARPENING
REPLACEMENT OR
WARNING:
Be sure to discohnect 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.
1. Remove the hex flange nut which holds the
blade to the blade spindle.
2. Remove the blade from the spindle.
B. SHARPENING
Remove the cutting blades by following the
directions of the preceding section.
When sharpening the blades, tollow 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 screwddver. Remove metal from
the heavy side until it balances evenly.
C. 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 CARE AND MAINTENANCE
(TYPE "A" BATTERY)
Type "A" batteries are sealed and are maintenance
free.
BATTERY CARE AND MAINTENANCE
(TYPE "B" BATTERY)
CHECK FLUID LEVEL
Check fluid level inside each cell of the battery
every two weeks and before and after charging.
Always keep leve_ between maximum and minimum
fill level.
Add only distilled water. Never add additional
acid or any other chemicals to the battery after
initial activation.
NOTE:
After operating the lawn tractor for a long
period of time, check the fluid level in the battery as
it can overheat and lose fluid.
CHARGING THE BATTERY
(ALL BATTERIES)
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."
2O