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Safety notes
2
P/N 6525032M1 - X6
Further notes
The following notes are designed to complete the Opera-
tion and Maintenance Manual to ensure that your tractor
always works safely, reliably and efficiently.
Tractors are mainly designed for hitching implements
that are held by a three-point linkage, for towing them by
the tow-hooks or for driving implements using the PTO.
To obtain the greatest possible towing force, particularly
when using a tractor with dual rear wheels, you should
observe the following rules concerning axle loads and
wheel slip.
If an extra implement is attached, the extra loads must
conform to the specifications given in the Manual or by
your Argo Tractors Dealer.
1. Load on front axle: four-wheel drive tractors.
A front axle carries normally about 40% of the tractor
on road without implements. Therefore an additional
weight on the front and could be required to give the
front axle proper drive.
If an implement is mounted on the front end of the
tractor, check the weight of the fully loaded implement
by placing the front axle on a scale: the maximum
axle load must be less than the capacity of the front
axle.
Consult this manual or your Argo Tractors Dealer
to know maximum load capacity of front axle (max.
weight on front axle) according to tyres mounted on
your tractor.
2. Rear axle payload.
The maximum permissible payload for the rear axle
depends on whether or not the tractor is carrying a
weight or towing a load.
When the tractor is only carrying a load, without tow-
ing, the wheels must have sufficient capacity that is
ensured if the tyres are of the exact size and have
the specified number of warps (plies).
In certain conditions, extra weight may be applied to
the rear axle but it is not normally necessary unless
the ground offers very little grip.
Consult this manual or your Argo Tractors Dealer
to know maximum load capacity of rear axle (max.
weight on rear axle) according to tyres mounted on
your tractor.
When fully loaded, the weight of the tractor must be
less than the maximum permissible ballasted weight
since the tractor cannot be loaded right up to the
maximum static payload for each of the axles, front
and rear, at the same time.
3. Ballast and wheel slip.
Wheel slip must be measured for the tractor to oper-
ate efficiently during tillage.
On normal terrain in good operating conditions, wheel
slip should be between 4 and 10%.
On wet soil, wheel slip can exceed 12%.
If wheel slip is found to be greater than this amount,
proceed with care as operating conditions might
quickly become unstable and cause early tyre wear.
In certain conditions, it might be better to add ballast
in order to reduce wheel slip, but this increases the
workload of the transmission and thus reduces the
working life of the tractor.
This manual or your Argo Tractors Dealer will help
you ascertain the maximum ballast weight that you
can use in your normal working conditions.
Using dual wheels (if allowed) or wider tyres, the
tractor will have greater grip but the workload on the
transmission will also be greater, thus reducing the
working life of the tractor.
The only torque limiter in transmission is wheel slip.
4. Front axle lead when four-wheel drive is en-
gaged.
In a 4WD tractor, the ground speed of the front wheels
must be slightly faster than the rear wheels, in order
to ensure traction in any condition.
Therefore the front wheel lead should be between
1% and 4%, but not over 5%
The tyres supplied with your tractor have been checked
for the correct lead of the front wheels, but when you
change them, make sure you use tyres of the same
make and size in order to maintain the same speed
ratio between front and rear wheels.
If tyres of different makes are used, their size and
internal pressure may modify this ground speed ratio,
or advance. This could increase the load on the front
axle and lead to unacceptable operating conditions,
excessive tyre wear and, in extreme conditions, dam-
age to the front axle or transmission.
Always use the correct tyre pressures based on
tractor loading and ground conditions. This ensures
optimum performance greater operator comfort and
overall safety and reduces wear and tear to the drive
train components
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