4-2
602469_1009
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:
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 mower’s parts manual for
standard torque chart. See the
Product Literature
section of this
manual 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:
Only pneumatic tires are approved
for use on BigDog™
Mowers consumer mowers. Warranty claims will be denied on
any mower equipped with non-pneumatic tires.
Lubrication
Use SAE multi-purpose grease.
Electrical system
This mower is a 12 volt, negative ground (through the engine
block) electrical system. The mower’s frame does
not
serve as
the grounding point on this machine.
The recommended battery size is a garden tractor BCI group
U1R with 225 or greater cold ranking AMP rating. A
maintenance-free battery is recommended. Otherwise, follow
battery manufacturer’s maintenance, safety, storing and
charging specifications.
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 spark and flames. Unplug char-
ger before connecting or disconnecting from the
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 will 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
The BigDog™ Mowers C Series mowers are equipped with
two integrated hydrostatic transmissions. Fig. 4-1
The transmissions are sealed for life and do not require any
scheduled service.
WARNING:
When washing the mower, direct the
spray away (especially if using a power washer) from
the transmission’s seals to prevent water intrusion and
to ensure component performance.
Ft-lbs.
Nm
Wheel (lug) nuts............................. 65-75.......88.14-101.7
Blade spindle bolt top .......................75 .............. 101.7
Blade spindle bolt bottom ................118 ............ 160.01
Drive wheels ......................8-12 psi (55-83 KPa)
Gauge wheels .....................8-12 psi (55-83 KPa)
