Ballasting And Tyres; Front Axle Suspension; Factors Affecting Tyre Performance; Selecting Ballast - New Holland T7030 Operator's Manual

BALLASTING AND TYRES

GENERAL
Maximum tractor performance is dependent upon
proper ballasting and tyre selection. Maximum
efficiency will be achieved when tractor weight is
correct for the application.
The tyres selected for your tractor must be able to
support the weight of the tractor and equipment and
must also be able to provide adequate traction to
utilize the tractor horsepower and turn it into useful
drawbar horsepower.
Always maintain the correct air pressure in the tyre
to carry the load. Do not over inflate tyres.
NOTE: Radial tyres will work with lower air pressures
and will show up to 20% sidewall deflection or bulge
when correctly inflated.

FRONT AXLE SUSPENSION

IMPORTANT: On tractors fitted with front axle
suspension, correct ballasting is essential to
optimise suspension operation, particularly when
using heavy rear mounted equipment. For this
application, sufficient front ballast must be added by
the use of wafer weights in preference to liquid
ballast in the tyres
In certain conditions, with insufficient front weight
added, suspension operation may become disabled
and error code L7 displayed. Stop the tractor, switch
off the engine and restart again to clear the error
code and re- -enable the suspension. If the error code
re- -occurs, then further front weight should be added
ensuring maximum axle and vehicle weights are not
exceeded.
3--144
SECTION 3 - - FIELD OPERATIONS

Factors Affecting Tyre Performance

Correct air pressure for the load
•
Correct wheel slip
•
Correct tyre size for expected load
•
Correct fill of liquid ballast
•
Maintaining equal tyre pressure in both tyres on
•
a given axle.

Selecting Ballast

When tractor horsepower loads vary, the optimum
weight of the tractor will change. This means that
ballast may have to be added or removed to maintain
the best tractor performance. Proper ballast will
greatly improve tractor operation and ride.
The amount of ballast required is affected by:
Weight of tractor
•
Soil and traction conditions
•
Type of implement:
•
mounted or trailed
Working speed
•
Tractor horsepower load
•
Type and size of tyres
•
Tyre pressures
•
Do not use more ballast than needed. Excess ballast
should be removed when it is not required.
fully-mounted, semi-