COCHET DUO User manual

OPERATION AND
MAINTENANCE MANUAL
Lowering motorbike trailer DUO

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LIST OF CONTENTS
INTRODUCTION ........................................................................................................................................................................3
GLOSSARY.................................................................................................................................................................................3
LEGISLATION.............................................................................................................................................................................4
LICENCE.................................................................................................................................................................................4
INSURANCE...........................................................................................................................................................................4
REGISTRATION....................................................................................................................................................................5
GENERAL INFORMATION..........................................................................................................................................................6
DIRECTIONS FOR USE................................................................................................................................................................7
COMPLIANCE WITH THE LOAD CAPACITY ............................................................................................................................7
LOAD POSITIONNING............................................................................................................................................................7
STRAPPING DOWN THE LOAD ..............................................................................................................................................8
ADJUSTEMENT OF FRONT WHEEL STAND ............................................................................................................................9
HITCHING AND UNHITCHING .................................................................................................................................................10
HITCHING............................................................................................................................................................................10
UNHITCHING.......................................................................................................................................................................12
ROAD USE ...........................................................................................................................................................................12
LOWERING THE TRAILER BED .................................................................................................................................................13
RAISING THE TRAILER BED......................................................................................................................................................14
ROAD USE ...............................................................................................................................................................................15
STORING THE TRAILER............................................................................................................................................................16
SERVICING ..............................................................................................................................................................................18
RUNNING GEAR ..................................................................................................................................................................18
BODYWORK ........................................................................................................................................................................19
JOCKEY WHEEL AND HITCH ................................................................................................................................................20
ELECTRICITY (STANDARD CONNECTIONS) ..........................................................................................................................20
WARRANTY.............................................................................................................................................................................22

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INTRODUCTION
We would like to thank you for choosing a lowering trailer DUO, designed and manufactured by
COCHET SA.
This manual contains information and characteristics concerning your new road trailer. Please
read this manual carefully, in order to familiarise yourself with the trailer before using the public
highway.
In order to prolong the working life of your trailer, it is essential that it is used and serviced
correctly. Equally, it is one of the conditions for ensuring that the warranty remains valid.
By following and complying with the advice and instructions given in this manual, you will be
able to benefit from many years of safe use with this trailer.
As progress is a constant preoccupation, the COCHET SA Company reserves the right to modify
its trailers, without the obligation for applying the modifications to any trailers that have already been
sold.
Please pass this document on to the new owner in the event of this trailer being sold.
GLOSSARY
PTAC
Gross laden weight
PV
Unladen weight
CU
Load capacity = PTAC - PV
PTR
Maximum authorized mass
= PTAC of the towing vehicle + PTAC of the trailer
PTRA
Maximum authorised mass

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LEGISLATION
LICENCE
A vehicle towing a trailer forms a combination of vehicles. In order to drive a combination
of vehicles, it is necessary to understand and comply with the relevant legislation in the
Highway Code:
French driving licence for driving a combination of vehicles in France:
- If the PTAC does not exceed 750Kg, the driving licence category B is sufficient
- Since 19/01/2013, if the PTAC exceeds 750Kg, the driving licence category B is
sufficient if the total PTAC of the towing vehicle and the trailer is equal to or inferior to the
3500Kg
If one of these conditions is not met, not only is the driving licence category B required,
but also:
- a 7h training course to drive a combination of vehicles whose PTAC is between
3500Kg and 4250Kg
In any case, the sumof the total laden weightsmust not exceed the PTRA of the towing vehicle.
For more information, contact the official organizations concerned.
INSURANCE
A trailer that has a PTAC that does not exceed 500Kg is generally covered by the towing
vehicle’s insurance. However, it is advisable to contact your insurer.
Above 500Kg of PTAC, it must have its own individual insurance.
(Ask your insurer about that)

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REGISTRATION
A trailer that exceeds 500Kg of PTAC must have its own number plate and registration
document.
Below 500Kg of PTAC, it is sufficient to attach a homologated number plate bearing the
towing vehicles registration number.
Attach your number plate as high as possible, and centred, on the bracket provided.

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GENERAL INFORMATION
Before using the road, you must check the general condition of your trailer.
The advice and instructions are merely informative, and their contents shall under no
circumstances give rise to any liability on the part of the manufacturer.
ATTENTION :
Once your trailer has travelled its first 100 km, it is essential that you check
the tightness of the wheels.
Before starting, always ensure that you have:
· Checked the condition and the pressure of the tyres
· Checked the tightness of all safety equipment and also the wheels
· Checked the condition and the level of wear in the draw bar ball hitch
· Checked that all the lights are working correctly
· Checked that the load carried is correctly attached
· Checked that the trailer locking system and the ball hitch are correctly locked (Page 15 of this
instruction manual)
· Checked that the number plate is visible and correctly positioned (Page 5 of this instruction
manual)

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DIRECTIONS FOR USE
It is essential that the trailer is loaded correctly in order for it to be towed and used on the public
highway safely. 3 critical factors must be respected: The laden weight, the position of the load,
the way in which the load is secured.
You are entirely responsible for securing the load that you are transporting.
Reminder:
1m3of sand weighs approximately ±1800Kg.
1m3of wood weighs approximately 450/650Kg (depending on the level of dryness).
COMPLIANCE WITH THE LOAD CAPACITY
The load capacity of the trailer is the difference between it’s unladen weight shown on the plate
as the tare and its PTAC. Remember to take the weight of any accessories into account as
they will reduce the load capacity.
LOAD POSITIONNING
Every precaution must be taken to ensure that the load transported bya vehicle or trailer cannot
cause damage or danger (Article R312-19 Highway Code)
The load must be positioned in such a way that the weight at the ball hitch is equal to
approximately 5 to 10% of the total mass of the trailer and its load, without, however,
exceeding the maximum weight indicated on the manufacturer’s plate shown opposite the
figure 0, which is a legal requirement. (Refer to the image shown below).

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The position of the load on the trailer is extremely important. If it is too far forwards, there will
be too much weight on the ball hitch and there is a risk that the draw bar will break. Too
much at the back, there is a risk of the trailer having uncontrollable yaw, and therefore a very
high accident risk.
The trailers made by COCHET SA. Comply with the legislation n°55 and are designed to have
a hitch height of between 395mm and 465mm.
STRAPPING DOWN THE LOAD
The load to be transported must be strapped down tightly to avoid any movement in the event
of an emergency stop. Correct strapping will also prevent the load from moving and as a result,
any movement away from the centre of the trailer, therefore eliminating the risk of trailer yaw.
In order to strap the load correctly, use the rings provided. You can also use the bars on the
trailer sides if the trailer is fitted with them, or you can hook the straps directly onto the trailer’s
chassis.
Load too far forwards
NON-COMPLIANT
Load spread between the axle
and the front of the trailer
COMPLIANT
Load at the back
NON-COMPLIANT

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ADJUSTEMENT OF FRONT WHEEL STAND
Warning ! Your front wheel stands are not adjusted at the factory for yours
motorcycles, be sure to adjust them before traffic.
Warning ! There must be space between the ground and support for proper
use of Front Wheel stand, there also must be a space between the wheel and
the ground, if there is no space, advance the support a notch and control
again.
Support
(Long side backwards)
Support
(Long side up)
Space between ground and support
Space between ground and wheel

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HITCHING AND UNHITCHING
When using the trailer for the first time, ask your dealer to show you how to
hitch the trailer correctly.
Warning ! Before coupling and
uncoupling, make sure that the
wheel is in the stowed position.
HITCHING
1) This manoeuvre is extremely important. Check that your
ball hitch has the handle in the locked position (raised), and
that the red guide is visible.
2) Move the ball hitch to within a few centimetres of the
towing ball. Use the jockey wheel to simplify this manoeuvre.

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3) Loop the safety chain for unbraked trailers around the
towing ball in such a way that it doesn’t affect the way in which
the hitch works. For braked trailers, attach the anti-rupture
cable after the trailer has been hitched.
4) Using the jockey wheel, lower the ball hitch until the handle drops down and clicks into place.
5) Insert the trailer light plug into the car’s trailer lighting socket.
6) Raise the jockey wheel completely until the wheel swings round towards the trailer.

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UNHITCHING
Ensure that the trailer cannot run away when it is unhitched, if there is the slightest doubt, put
blocks on either side of the wheels if it is an unbraked trailer, or use the parking brake if it is a
braked trailer.
Disconnect the trailer lighting plug from the towing vehicle. Lower the jockey wheel whilst
ensuring that the wheel is correctly positioned. Press on the safety catch and raise the handle
on the ball hitch (refer to the image shown below), use the jockey wheel to raise the ball hitch
clear of the vehicles towing ball.
Once the trailer is unhitched, lift the safety chain from the towing ball.
Ensure that the trailer cannot move by putting blocks on either side of the wheels.
ROAD USE
Driving a vehicle towing a trailer is not particularly difficult. However, some precautions must
be taken, such as anticipating braking and also taking the overall size of the vehicle and trailer
into account.
When going around bends, take them a little wider, depending on the length of the trailer being
towed.
A trailer with its own registration document is limited to 130Km/h and cannot be used in the
third lane of a motorway.

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LOWERING THE TRAILER BED
Warning :
Ensure that nobody is too close when lowering the trailer bed
The trailer must only be loaded or unloaded when it is attached to a vehicle
Lowering the trailer bed is only possible with the back of the trailer in the
unfolded position ! Under penality of damage to the trailer.
Operate the winch as though the trailer was being raised in order to free the locking pin.
Remove the safety lynchpin and then the locking pin.
Operate the winch in the opposite direction for lowering until the trailer bed is fully lowered.
Direction for lowering
Direction for raising
Back of the trailer unfolded

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RAISING THE TRAILER BED
ATTENTION :
Ensure that nobody is close by when the trailer bed is being raised.
ATTENTION :
It is essential that the trailer bed is locked when using the public highway.
The trailer must only be loaded or unloaded when it is attached to a vehicle.
Operate the winch in the direction for raising in order to insert the locking pin.
Insert the locking pin and then the safety lynchpin.
Operate the winch in the direction for lowering until the locking pin is under pressure.
Turn the winch handle one complete turn in order to release any tension in the winch cable.
Direction for raising
Lowering direction

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ROAD USE
ATTENTION :
It is imperative that the ball hitch is correctly lockend when using the public
highway
The parts shown below in a red are key SAFETY features. It is essential that the draw bar
locking pin’s position is checked systematically before taking the trailer onto the public highway.
The locking pin (1) locks the draw bar (3) to
the chassis. Check that it is correctly
positioned on either side of the draw bar.
Check that the safety lynchpin is in place.
The locking shackle (2) eliminates any play
between the draw bar and the chassis. Always
ensure that the lock nut is tight before using
the public highway with the trailer.
ATTENTION :
When using the trailer on the road it is essential that the back is unfolded
When the trailer is being used on the road the back of it serves as an underrun protection bar.
When the trailer is empty, it is obligatory to have the back in the lowered position.
When using the road: tighten the two wing nuts (shown below in red) to protect the back of the
trailer from any vibration linked to road use.
Rear of the trailer
1 –Locking
pin
3 –Draw bar
2 –Locking shackle

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STORING THE TRAILER
When the trailer is in the raised position, fold the rear part of the bed forwards and use straps
to hold it in place against the front part of the trailer.
Lower the bed to the ground as shown on page 13 of this manual
Lock the axle by activating the locks on the right and left.
Strap
Strap

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Release the drawbar by removing the locking pin and the locking shackle.
Tilt the clevis and lock it in position with the locking shackle.
Tilt the wheel under the coupling head
Locking pin
Locking shackle

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Pull the handle slightly upwards, while operating the winch, to put your trailer in the stowed
position.
SERVICING
Your COCHET SA lowering trailer should be serviced regularly as it will play a large part in the
way in which the trailer ages. As with any vehicle, it should be serviced regularly by an official
dealer. It should be serviced every 5000Km or once per year.
RUNNING GEAR
Check the condition of the tyres regularly, especially before the trailer is about to be used.
Check the condition of the tyre treads, as well as the side walls in order to ensure that there is
no deformation or abnormal wear. Check the tyre pressures using the recommendations shown
below:
The rubber torsion bar suspension does not require any special maintenance.
The condition of the wheel bearings should be checked regularly by an official dealer. In order
to check their condition quickly, raise the trailer wheel using a jack and then spin it. If you hear
a rumbling noise, get the bearing replaced by your dealer. Equally, if there seems to be
excessive play, have it checked over by your dealer.
Dimension
Pressure (Bar)
155/80R13
2,5
165/R14
4,5

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Check that the wheel bolts are tight. This check should be carried out before and after the first
journey with the trailer, and then after the first 50 kilometres. If necessary, tighten the wheel
bolts (using the torque table shown below). Check that the wheel rims are not cracked or
damaged.
BODYWORK
Your trailer’s bodywork should be looked after carefully with regular maintenance in order to
ensure that your trailer ages well.
Galvanized parts do not form a protective film against rust, until the galvanization has been
subject to oxidization. Once the oxidizing process has taken place, the galvanized parts will
have a matt appearance. Galvanization can be attacked by acids and salt.
It is imperative that the trailer is rinsed with cold water if it has been used on snowy
roads (road salt applications) or if it has been used by the sea.
It is possible that traces of white rust will appear on your trailer, this is normal and unimportant;
they do not alter the protective coating of your trailer that is provided by galvanization, and their
appearance is not a valid reason for making a warranty claim.
Avoid letting any stagnant water collect on your trailer.
Thread
Tightening torque (daN)
Marked on the bolt head
8,8
10,9
M5
0,6
0,9
M6
1
1,5
M8
2,5
3,5
M10
5
7,5
M12
8,5
13
M16
21,5
31,5

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JOCKEY WHEEL AND HITCH
Check that the jockey wheel functions correctly, by turning the wheel regularly. If necessary,
apply grease to the shaft.
Do not maneuver the trailer when it is fully laden using the jockey wheel as this can cause its
premature deterioration
The hitch should be cleaned and greased at regular intervals.
ELECTRICITY (STANDARD CONNECTIONS)
It is a legal requirement to have road lights that are in good working order. You must always
check that the road lighting system is working correctly before using the trailer.
All work on the electrical circuit must be carried out by qualified personnel.
Insert the trailer light plug into the towing vehicle’s socket, whilst ensuring that the grooves are
correctly aligned. Your trailer is fitted with a 7/13 plug adapter (13 pins on the trailer/ 7 pins on
the vehicle).