Operator`s manual

15
SECTION 4
DRIVING PROCEDURES
4.5 OPERATING INSTRUCTIONS - 750 HDi, 700 HD
and 650 HD
The 750 HDi and HD models are equipped with the ADMI-
RAL steering transmission. The ADMIRAL is a triple differen-
tial transmission with unique steering characteristics not found
in prior Argo models or traditional skid steer vehicles. The
ADMIRAL features two distinct modes of operation, HIGH
range for typical trail riding and LOW range when tight turns
are required. This transmission allows the ARGO to tackle a
wider range of terrains and operating conditions.
When operating in HIGH range, a full lock right steering
input will cause the right side wheels to turn forward at a
lower rate (approximately 1/3 the speed) compared to the left
side wheels and vice versa when full lock left steering input
is applied. While this does not allow for zero radius turns, as
found on Avenger and Frontier models, it does greatly increase
efciency, reduces engine, transmission & brake temperatures
and reduces driver steering effort.
When operating in LOW range, a full lock right steering input
will cause the right side wheels to turn backwards slightly.
This will result in a tighter turn compared to transmissions
found on the Avenger and Frontier. This mode of operation
should only be used for slow speed operation when tight
turning is required.
NOTE: Extended use of Low range at higher speeds may
result in increased engine, transmission and brake tempera-
tures. This mode of operation should be avoided unless the
terrain or obstacles warrants its use.
4.5.1 Selecting Forward, Neutral, Reverse, High or Low - HDi
and HD
The ADMIRAL transmission uses dog clutches to engage
internal gears. The dog clutch is not synchronized to allow
for shifting-on-the-y. To avoid personal injury, transmis-
sion, vehicle or property damage, always bring the vehicle to
a complete stop, allow the engine to return to idle, compress
and hold the hydraulic hand brake, then select the appropriate
gear function. Once selected, release the hydraulic hand brake
and accelerate to desired speed.
NOTE: When selecting from HI to LOW or LOW to HI, the
dog clutch may not automatically engage its mating gear.
This is normal and expected. The HI and LOW selector is
spring-loaded and will lock into place once engine RPM rises
and clutches begin to engage. A slight, but normal, “clunk”
noise may be heard during this procedure.
4.5.2 HDi and HD Recommended Gear Selections
Trails and higher speed driving: Recommended gear
selection HIGH range: In High range, the 750HDi and HD
models will turn as tight as most ATV’s and UTV’s, which
is ideal for trail riding. Compared to previous braked skid
steer vehicles, these models will corner with minimal loss
of speed or engine power. The increased efciency results in
cooler running temperatures for the engine, transmission and
steering system.
Towing: Recommended gear selection HIGH range: With
increased efciency and positive all-wheel drive in high range,
the operator is able to maintain momentum, traction and con-
trol while under load. Engine power and smooth steering is
maintained, point-turn operation is eliminated, allowing for
smooth operation and towing. The elimination of point-turn
while in high range reduces the likelihood of a “jackknife”
situation.
Climbing hills: Recommended gear selection HIGH
range: Similar to a towing situation, climbing hills success-
fully means maintaining traction and momentum. It is usually
unwise (and unsafe) to perform sharp turns while climbing
hills, so Low range, if required, should be used with caution
in these situations.
Mud and Snow (including track use): Recommended gear
selection HIGH or LOW range: Low traction situations
are usually handled best in high range due to the fact that
any turning inputs will “lock the differential” and force all 8
wheels to drive. If tightly spaced obstacles are present, low
range will provide added maneuverability, albeit at a cost in
both traction and efciency.
Water / Amphibious use: Recommended gear selection
HIGH or LOW range: While operating the vehicle in deep
water, either range selection may be appropriate. In High
range, the operator may notice a lack of maneuverability, es-
pecially at full throttle. In Low range, the inside, or steered,
tires can counter rotate thereby providing greater maneuver-
ability and control when turning the vehicle. There is a slight
reduction of top speed when selecting Low range for water /
amphibious use.
Low speed (with obstacles): Recommended gear selection
Low range: While traversing a rock eld or a wooded area,
increased maneuverability available in Low range is a valuable
asset. Switching back to High is highly recommended when
the terrain clears and tight / sharp turning is not required.