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| Vehicle recovery
off-road |
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| How
to pull yourself free |
| What
to do with one vehicle |
| It's
easier with two |
| Recovery
strap tips and techniques |
| Winching
you way free |
| Winching
tips and techniques |
| Anchoring
and operation |
| Rewinding |
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| How
to pull yourself free |
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Sooner or later, every 4x4
driver gets stuck. When it happens, survey the situation,
stay calm and be patient. It takes time to recover your vehicle
safely.
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In mud, snow and sand, the
first thing to do is try to reverse out of the problem. Remember
that there are two reverse gears in some 4x4s High
and Low. Sometimes using reverse in High Range will free a
stuck vehicle, while using reverse in Low Range may just spin
the wheels.
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If this doesnt work,
try gently rocking the vehicle backward and forward by using
a reverse and then a forward gear. Your passengers can help
by pushing, but co-ordinate this effort so that you are not
reversing when your help is pushing forward! Always be aware
of your helpers whereabouts when they are near the vehicle.
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The important thing to remember
is, do not keep spinning the wheels when you are truly stuck.
Spinning wheels will only dig the vehicle in deeper and make
recovery more difficult.
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| What
to do with one vehicle |
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When the vehicle is
really stuck, the hard work begins, especially if you are
travelling with only one vehicle. The first thing to do is
to shovel away mud, earth, snow or sand from under the vehicle
and clear a path in the direction of travel, so the tyres
can get enough traction.
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Carpet strips, floor
mats, brush, rocks or, if you are desperate, clothing or sleeping
bags, can be placed as traction aids under the tyres in the
direction of travel. Tyre chains will help in snow and some
types of mud.
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If you still cant
get out, jack up the vehicle and fill the area under the tyres
with sand, rocks, logs, brush, packed snow or a combination
of these. If the jack sinks into the ground, use your 60cm
square plywood section as a base. Do not crawl under a vehicle
that is supported by a jack, as this can be very dangerous.
If you get stuck on a rock, stump or log, the first thing
to do is to survey the situation and figure out the best way
to free the vehicle without damaging it. Take your time. If
you are stuck on an object that can be moved, jack up the
vehicle and clear away the obstacle. If the obstacle cant
be moved, jack up the vehicle and fill under the tyres so
that you can drive over the obstacle.
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| It's
easier with two |
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If you are travelling
with another vehicle, a recovery strap can be used to pull
you out once a path has been cleared.
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A recovery strap is made
of heavy-duty nylon with an eye sewn into each end. Unlike
a cable or chain, a recovery strap stretches like a rubber
band. This cushions the initial force applied to the stuck
vehicle. It also stores energy that is released when the
stretched strap returns to its normal length. This extra
stored energy allows a small vehicle to free a much larger
vehicle.
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| Recovery
strap tips and techniques |
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The strap must be in good
condition no cuts, frays or broken stitching.
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Attaching points and their
associated hardware on both vehicles must be strong enough
to withstand the force applied to them. Attaching points must
be secured to the vehicles frame.
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Bystanders must stay clear.
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The recovery vehicle should
use an attaching point at its rear. This placement gives the
driver more protection than would a windscreen if anything
should come loose.
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Remove obstacles such as
rocks and logs that are in the recovery path.
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Do not attach a strap in
a way that allows it to become cut or chafed.
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Use a strap with enough
strength and one that is designed for this type of use. An
8cm x 9m strap is recommended.
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Start out with a small amount
of slack in the strap and a modest amount of acceleration
when tugging on a stuck vehicle. Forces increase dramatically
when the amount of slack in the strap and the tow vehicles
acceleration increase.
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Store nylon straps away
from sunlight in a clean, dry condition.
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| Winching
you way free |
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The best way to get
unstuck is with a winch. A winch takes the hard work out of
vehicle recovery, it allows a lone vehicle a means of freeing
itself, and in some situations, a winch is the only tool that
can be used to recover a vehicle.
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Another vehicle can
be used as an anchor, but natural anchors, such as trees,
stumps and rocks, are the handiest. When no natural anchors
are available, a spare tyre, log or any other similar object
that can be partially buried can form an anchor.
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Always select your
anchor carefully to be sure it is strong enough to withstand
the load. It may be wise to use several items and group them
as a single anchor.
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A chain or strap must
always be used around the anchor to which the winch cable
is attached. The winch cable should never be wrapped around
the anchor and hooked back onto itself since this will damage
the cable.
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In most situations,
assistance from the vehicle being recovered will be necessary.
This will place less load on the winch and cause less drain
on the battery in the case of an electric winch. This must
be done very carefully. When driving and winching, you must
not overtake the winch cable and allow the cable to become
slack and feed loosely onto the drum or run over the cable
with your wheels. In a vehicle equipped with a manual transmission,
be careful not to slip and overheat the vehicles clutch.
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| Winching
tips and techniques |
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Use your winch before you
actually need it to become familiar with its operation.
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Never attempt to operate
a winch without wearing heavy leather gloves.
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Never step over the cable,
even when it is not under load.
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Always stand clear of the
cable and load during the winching operation.
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While a remote-control lead
is plugged into the winch, always keep clear of the drum,
cable and rigging.
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Keep helpers and spectators
at a safe distance. If the cable pulls loose or breaks under
load, it can suddenly lash back with tremendous force.
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Never use the winch cable
as a tow rope. A winch is not designed for this and a sudden
jerk can snap the cable or damage the drum.
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| Anchoring
and operation |
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Always use a tree strap
when anchoring to a tree. Cables and chains can severely damage
a tree. Never use a nylon strap to anchor around rocks.
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When anchoring the pulling
vehicle, apply the parking brake and blocks to the wheels.
The foot brake will also provide additional holding ability
over the parking brake.
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Always unspool as much cable
as possible when rigging. Double the line with a snatch block
or pick an anchor as far away as practical. This will minimize
cable damage, such as mashing and kinking, caused from top
layers pulling down into the bottom layers when short pulls
are made. The greatest pulling power is available at the first
layer on the drum, decreasing with each successive layer.
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Never winch with fewer than
five turns of cable around the winch drum. With fewer turns,
the cable may break loose from the drum under heavy load.
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Always pull as straight
as possible to minimise the build-up of cable on only one
end of the drum.
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Put a blanket or coat on
the middle of the cable when winching. This will help slow
the cable down if it breaks and prevent injury or damage.
You can also raise the bonnet on the winch vehicle to protect
the winch operation from a broken cable or attaching hardware.
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| Rewinding |
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Always inspect and carefully
rewind the cable after use. Mashed, pinched or frayed areas
severely reduce the original tensile strength. For safetys
sake, replace the cable when damaged.
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Do not let the cable slide
through your hands, even when wearing gloves.
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At times, it may be necessary
to temporarily respool the cable under no load after use.
Hold the remote-control lead in one hand and the cable in
the other. Start as far from the vehicle as the remote control
will allow, activate the switch, walk in a metre of cable
and release the switch. Repeat the process. Always release
the switch when you are at least one metre from the winch.
And always wear heavy gloves when handling the cable.
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Always release the switch
when the hook is a minimum of one metre from the winch. Place
the hook on a suitable spot on the mounting kit. Then, keeping
your hands completely clear of the hook, cable and winch,
"jog" the switch intermittently to take up the slack.
Do not over-tighten the cable or damage may occur.
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When spooling the cable,
be sure to distribute it evenly and tightly on the drum. This
prevents the top layers of the cable from being drawn into
the bottom layers and creating a bind.
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| All of this may sound
tedious, but careful planning and slow, careful attention to detail
will make vehicle recovery safe and relatively easy. But dont
wait until youre in dire straights to try this out. Practise
vehicle recovery with a friend so when an emergency comes, you're
prepared. |
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