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using jack stands or blocks, in the full up position and scrape the
build-up from underneath.
Some repairs require the assistance of a trained service
mechanic and should not be attempted by unskilled personnel.
Consult your BigDog™ Mowers service center when assistance
is needed.
Torque values
WARNING:
Particular attention must be given to
tightening the drive wheel lug nuts and blade spindle
bolts. Failure to correctly torque these items may
result in the loss of a wheel or blade, which can cause
serious damage or personal injury.
Torque values are given below:
Ft-lbs.
Nm
Wheel (lug) nuts . . . . . . . . . . . . . . . 65-75 . . . . . 88.14-101.7
Blade spindle bolt top . . . . . . . . . . . 65-75 . . . . . 88.14-101.7
Blade spindle bolt bottom . . . . . . . . . 118 . . . . . . . . .160.01
Wheel motor nut . . . . . . . . . . . . . . 200-210 . . . . 271.2-284.7
Lug nuts only -
It is recommended that these be checked after
the first 2 hours of operation, initially, every 50 hours and
following removal for repair or replacement.
For all other torques refer to the various mower parts manuals
for standard torque chart. See
Product Literature
section for
ordering information.
For engine torque values, see engine owner’s manual.
Tires
It is important for level mowing that the tires have the same
amount of air pressure. The recommended pressure are:
Drive wheels . . . . . . . . . . . . . . . 8-12 psi (55-83 KPa)
Gauge wheels . . . . . . . . . . . . . . . 8-12 psi (55-83 KPa)
Only pneumatic tires are approved
for use on BigDog™
Mowers X Series mowers. Warranty claims will be denied on
any mower equipped with non-pneumatic tires.
Lubrication
Use SAE multi-purpose grease.
Electrical system
The electrical system is a 12 volt, negative ground.
Recommended battery size is a garden tractor BCI group U1R
with 225 or greater cranking AMP rating. A maintenance-free
battery is recommended. Otherwise, follow battery
manufacturer’s maintenance, safety, storing and charging
specifications.
The main circuit is controlled by an in-line 25 amp fuse.
WARNING:
Battery posts, terminals, and related
accessories contain lead and lead compounds, chemi-
cals known to the State of California to cause cancer
and reproductive harm. Wash hands after handling.
WARNING:
Charge batteries in an open well venti-
lated area, away from sparks and flames. Unplug char-
ger before connecting or disconnecting from battery.
Wear protective clothing and use insulated tools.
WARNING:
Avoid skin and clothing contact with
battery acid.
Always wear eye protection when checking the bat-
tery, acid can cause serious injury to skin and eyes. If
contact occurs, flush area with clean water and call
physician immediately. Acid will also damage cloth-
ing.
Do not drink the battery electrolyte.
Do not allow open flame near the battery when charg-
ing.
Hydrogen gas forms inside the battery. This gas is
both toxic and flammable and may cause an explosion
if exposed to flame. Always remove the negative
ground connection first and replace it last.
Do not overfill battery.
Electrolyte may overflow and damage paint, wiring or
structure. When cleaning the battery, use soap and
water. Be careful not to get soap and water into the
battery. Clean the battery terminals with a solution of
four parts water and one part baking soda when they
become corroded.
WARNING:
Shorts caused by battery terminals or
metal tools touching metal components can cause
sparks. Sparks can cause a battery gas explosion
which may result in personal injury.
Prevent the battery terminals from touching any metal
mower parts when removing or installing the battery.
Do not allow metal tools to short between the battery
terminals and metal mower parts.
WARNING:
Incorrect battery cable routing could
cause damage to the mower and battery cables. This
can cause sparks which can cause a battery gas explo-
sion which will result in personal injury.
Always
disconnect
the negative (black) battery
cable(s) before disconnecting the positive (red)
cable(s).
Always
connect
the positive (red) battery cable(s)
before connecting the negative (black) cable(s).
Hydraulic system
IMPORTANT:
Never use hydraulic or automatic transmis-
sion fluid in this system; use only motor oil as specified.
Remember, dirt is the primary enemy of any hydraulic system.
WARNING:
Hydraulic fluid escaping under pressure
may have sufficient force to penetrate skin and cause
serious injury. Foreign fluid injected into the skin must
be surgically removed within a few hours by a doctor,
familiar with this form of injury, or gangrene may
result.
Before applying pressure to hydraulic system, make
sure all connections are tight and all hoses and lines
are in good condition. To find a leak under pressure,
use a piece of cardboard or wood —
never
use your
hands. Relieve all pressure in the system before dis-
connecting or working on hydraulic lines. To relieve
pressure, lower all attachments and shut off engine.
