With Double Frame 

K.T.S Timber Trailers with Double Frame 10
.6 - 13.0 ton
Owning forest also means taking care of it in order to maintain and increase the value of the property. What is it worth to you to take care of windfallen or dry trees, wood etc. when it suits you and your forest best? Does that mean freedom to you too?

The K.T.S Crane and the K.T.S Trailer are designed to work together as a hard-wearing complete unit.

Lifting timber with the grapple loads every part of the entire vehicle. Some of these loads are transferred to the ground through the support outriggers, while others load different parts of the crane and trailer, before finally being transferred to the ground through the bogies, axles and wheels.

FEM (Finite Element Method) design ensures that all components of the crane and trailer are carefully matched to each other in terms of strength. This avoids, on the one hand, an excessively heavy trailer and, o the other, a trailer that is light but which will have only a limited life. Which is the cheaper in the long run - a strong trailer with a long life, or one that lasts only a few years?

When you go to the forest with your K.T.S Timber Trailer you are very well-equipped. It has a combination of strength and high quality with a strong frame and generously-sized joints for the steering mechanism. Bogie frames, axles and wheels all work together to provide many years' service in carrying heavy loads. High ground clearance and large wheels reduce the risk of damage to the ground or growing plants. The comfort joint makes it possible to place the grapple close to the gate, in order to have as low a centre of gravity for the crane as possible. A low centre of gravity means that the trailer will not overturn easily.


The K.T.S Crane does not only have great flexibility - it is also extremely strong!

Strong cranes make the forces acting on the slewing house, 3-point hitch and support legs almost incredible when handling large logs. Then, it is safe for you as the owner to know that the equipment will stand the test. 

K.T.S means quality and strength, right down to the smallest detail

The slewing house is the component through which all forces act.
This is why the K.T.S
slewing house is extremely high, at 290 mm, to increase the distance between the load-carrying bushings. The greater the distance, the greater the strength, which is most important when lifting heavy logs or if the crane is to be fitted with a digging unit. The difference can be seen when comparing these features with those of other cranes.

The slewing mechanism, crane post and boom mounts together form a very substantial and strong unit. The design of the slewing house and cylinders enables the crane to slew through 370.

The slewing house is entirely Swedish-manufactured, from quenched and tempered steel.

The entire slewing mechanism, with the slewing shaft, gear racks and slewing pistons, runs in an
oil bath for maximum strength.

Look at the matchbox in the picture above, and you will realize the strength of the slewing house.

All K.T.S Cranes are equipped with the same slewing house. All that differs is the choice of materials for racks and pinions, see specifications.

The K.T.S Comfort Joint on all models greatly simplifies work

The Comfort Joint
is an additional joint that significantly increases the motions available, i.e. the crane can work much more closely inboard. Some manufacturers' cranes have the hydraulic cylinder connected directly to the boom, which restricts the angle through which the boom can move. When loaded with such a crane, the logs are gripped at the middle as usual in order to provide balance, but they cannot be loaded sufficiently far forward on the trailer. The grapple has to be released and moved to a new grapple on the logs, in order to move them forward on the trailer. The K.T.S Comfort Joint makes it possible for you to grapple the logs from the ground for direct loading onto the trailer, without having to re-grip the logs, also making it easier to operate the K.T.S Crane.

The K.T.S Comfort Joint simplifies the work, as it allows timber to be loaded without having to re-grip it. It also means that short 1 m lengths can be loaded against the gate, which can be useful when, for example, logs are very large and have to be cut into 1 m lengths in order to enable the crane to lift them.

The Comfort Joint also provides greater flexibility when loading, for example, brushwood.

It also allows the crane to be folded so that it takes less space.

The Comfort Joint also means the crane can lift timber close to the tractor.

Naturally, the K.T.S Crane can slew through an angle of 370, enabling it to reach timber in front of the tractor.

All functions of the K.T.S Crane are double-acting, which is a prerequisite for digging with the crane. Moreover, it is most useful with double-acting functions, should the trailer overturn, so that it has to be raised by means of the crane.

On full lock, the reach of the crane is increased by about 0.6 m. In other words, longer reach for no additional cost.

Hose routing is most important in avoiding abrasion damage or leaks. Apart from the risk of breakdowns, we know that leaking oil can harm the ground and pollute groundwater.

The hoses are run inside the booms.

The joint between the boom and the telescopic arm is an exposed area, with risk of hose damage. The hoses have therefore been run inside the comfort joint, in order to protect them by the links.

More well-designed and smart solutions 

Which is the proper location of the support for the trailer steering? Behind the gate or in front of the gate and 3-point hitch attachment?

What happens when you lift a heavy log perpendicularly from the trailer and turn the crane for loading onto the trailer?

The load passes through the crane and slewing house, and down to the ground through the support legs.

What will happen when the crane is turned back for loading onto the trailer? the forces are transferred from the support leg to the frame, where they are to be transferred to the wheels. This means that the crane, slewing house, 3-point hitch, and 3-point attachment to the frame and further down to the wheels have to be as strong as possible.

It all adds up to a simple choice for us at K.T.S!
Support in front of the 3-point, since it is much easier to build everything under item B above as a complete unit without regard to the fact that there should be a drawbar underneath, where the loads are the greatest.

What about the trailer tracking when using trailer steering? it does not matter - K.T.S has compensated for this by increasing the trailer steering angle by a few degrees. Anyway, with both types of construction the location of the swivelling point is not the decisive factor for the turning motion, but in both cases the turning radius is determined by the point where the rear wheels of the tractor touches the drawbar. The fact is that a long obtuse-angled drawbar (swivelling point far towards the rear) hits the rear wheels of the tractor long before a short acute-angled drawbar does!

Kindly also note the practical chain-saw box in front of the gate. the box is large enough to comprise chain saw, oil canister, crow bar, chains etc.

Easy to transfer the crane from the trailer to the tractor's 3-point hitch

K.T.S believes that it should be simple to transfer the crane from the trailer to the tractor's 3-point hitch. Just imagine how useful it is to be able to use the crane for other purposes, which would not be possible if it was permanently mounted on the trailer. This means that the crane can also be used for:

  • General lifting duties at building sites.
  • Lifting fertiliser or seed bags for spring planting.
  • Using the crane to dig with.
  • Loading bulk powders etc. after fitting liner plates in the grapple.




The high ground clearance beneath the 3-point adaptor enables it to straddle the tow hook on e.g. a log trailer. The outrigger support legs will also pass far outside the tractor, for maximum crane stability and less pressure on the hydraulic arms of the tractor. This is very important if the crane is to be fitted with a digging device.

K.T.S Double Frame Trailer 13.0 t with 7.5 m Crane.

All hydraulic cylinders are mounted above the booms, and all hoses are run inside the booms, thus protecting them from damage by logs. Protecting the cylinders reduces breakages and lowers costs.

 Outriggers or telescopic support legs - which are most suitable for you?

The picture shows both telescopic support legs and outriggers to demonstrate that both alternatives are possible, but in practice you choose only one of these.
  • K.T.S provides a choice between outrigger legs and telescopic support legs.
  • Both types have their advantages and drawbacks. With both available, you can choose which is the best for you.
  • Both have excellent ground clearance when raised/retracted, thus minimizing the risk of catching in stumps, boulders or shrub growth.
  • Both types can be extended to some distance below the nominal ground level, which means that the trailer can be levelled even if a leg happens to be over a hollow.
  • The support legs are secured to the 3-point adaptor by very substantial bolts in order to withstand heavy use.
  • Please note the heavy-duty 3-point adaptor and its attachment to the trailer by means of eight M20 bolts.

  • The outrigger support legs come as standard with our K.T.S Trailers and Cranes, and can be extended further than telescopic support legs, thus improving the stability of the trailer/crane when loading.

  • The support legs of both types are secured to the 3-point adaptor in the same manner. 


K.T.S Crane mounted on a tractor/forwarder or 3-point mounted on an existing trailer

The K.T.S Crane is very adjustable for different purposes and fittings, as shown in the picture, mounted on a Valmet 805. If you want to you can fit it on a forwarder.

You can also mount a small harvesting device on the K.T.S Crane.

One of the reasons the K.T.S Crane is so versatile is that you can order it with different crane pillar lengths, as you can see in the specifications.


Choose between different types of control lever systems 

For the controls there are also a variety of models to choose from. Order our brochure and read more about it!

A great advantage with the double frame is the possibility of loading shorter logs transversally. The trailer could then also be equipped with other stakes.

 For those who want to build their own long platforms for e.g. round bales, this is readily done on a K.T.S Trailer with double frame. The stability of the platform will be very good with clamps around both frame tubes.

 On a double-frame trailer the stake mounts are fixed and the bogie cannot be moved. As standard the trailer is equipped with four pairs of stakes, but, of course, it can be provided with attachments for more.

 The trailer can also be equipped with wider stakes for transportation of branches.


Make further use of your trailer - equip it with a tipper body!

Our philosophy here at K.T.S has always been that it should be possible to make optimum use of investments. Thus, we have developed the double-frame trailer, which is most suitable for a tipper body. You can equip it with a dumper body for transport of gravel and stones. The dumper body can also be equipped with a hydraulic or mechanical rear wall.

Dumper body for transport of gravel, stone and heavy material. It can also be equipped with a hydraulic or mechanical back wall.


The K.T.S Timber Trailer and K.T.S Hydraulic Crane are designed and intended to work together as a unit.

 Investing in, owning and using such a strong, carefully designed and long-life trailer is a guarantee of reliability and economy.

 All steel parts of the trailer are shot-blasted for maximum protection and finish quality. This is followed by priming and undercoating, before finishing with a high-quality top coat.

 This first-class surface treatment ensures that your investment will retain its finish, despite years of use and outdoor storage.

In order to make K.T.S Timber Trailer and K.T.S Crane as safe as possible, we also had it 3rd party CE-certified. The operating manual has also been reviewed for easy understanding.


Now it is up to you! We here at K.T.S look forward to having you as yet another satisfied customer of ours!


K.T.S Timber Trailer
Equipment Trailer 10.6 ton Trailer 13.0 ton
Maximum load 10.6 ton 13.0 ton
Standard crane 6.4 m 7.5 m
Other cranes possible to install  5.3 - 6.7 and 7.5 m  5.3 - 6.4 and 6.7 m
Effective load area   2.35 m2 2.80 m2
Chain-saw box   Yes/standard
Gate Yes/standard
Gate height 1 400 mm 1 550 mm
Stake height 1 400 mm 1 550 mm
Dimensions of stakes with internal reinforcement in foot 89 x 6 mm
Extension stakes No, stakes made as one unit
Divider stakes, for timber sorting Extra equipment
No. of stakes 4 pairs
More bolsters can be fitted Yes
Hydraulic support legs Yes/standard folding legs
Telescopic support legs Extra equipment
Trailer steering Yes/standard
No. of steering cylinders 2
Max steering angle 40 to both left and right
Towing eye to tractor Forged towing eye for hitch connector
Fork coupler when tractor has no towing hitch No
Lubricatable bushings or link bearings in all joints Yes/standard
Diameter of steering pivot 70 mm
Bogies Yes/standard
Tip angle of bogies +/- 30
Axle separation 995 mm
Distance on bogie from centre of front axle to centre of pivot 530 mm
Track width 1 622 mm
Tyre size, standard; other sizes available to order 400/60 x 15.5
520/50 x 17
12-ply, traction
Brakes, drum or disc Standard in some countries
Brake hoses run well protected in steel tubes between brakes and central frame Yes / standard when trailer is fitted with brakes
Required no. of SCV's 2 double-acting or 1 single-acting with separate return
Dimension of steel tubes for double frame of special steel 80 x 80 mm
Weight, complete timber trailer 2 609 kg 3 100 kg
Weight complete, without crane and 3-point adaptor 1 495 kg 2 040 kg
Extra equipment, see separate leaflet
Valve to run the crane with the pump for the hydraulic drive Extra equipment

K.T.S Hydraulic Crane
Equipment Crane 5.3 m Crane 6.4 m Crane 6.7 m Crane 7.5 m
Reach 5.3 m 6.4 m 6.7 m 7.5 m
Comfort joint to simplify work Yes / standard
Hydraulic extension No Yes / 1.2 m Yes / 2.0 m
Lifting capacity of grapple at maximum reach See separate table
Gross lifting force of crane 3.5 tonmeter 5.0 tonmeter
Grapple area of standard grapple 0.18 m2 0.21 m2
Fully rotating rotator Yes / standard
Rotator torque 750 Nm (75 kpm)
Slewing attenuator on rotator link Yes/standard
Hydraulic support legs on the trailer when sold with crane Yes/standard
Telescopic support legs instead of folding support legs Extra equipment
Hydraulic support legs when the crane is sold with a 3-point adaptor Yes/standard
No. of slewing cylinders on slewing house 4
Slewing angle 370 (360 is a complete revolution)
Slewing torque 10.4 kNm (1 060 kpm) 13.0 kNm (1 326 kpm)
Height of slewing house 290 mm
Hydraulic valve 7 slides 8 slides
Control levers 7 lever 1+1 levers with 2 functions each + 4 levers
(known as 2-lever arrangement)
Other control lever systems available Yes/extra equipment
Float position on hydraulic valve On 2 functions: boom and slewing of crane
Hydraulic valve suitable for open or closed hydraulic systems 
(Closed hydraulic system for e.g. John Deere)
Yes/extra equipment
Recommended pump capacity 
(Lower or higher flows can be used; the crane will simply perform more slowly or faster.)
15-50 l/min 20-60 l/min
System pressure 
(Lower pressure: lifting capacity will be reduced. Higher pressure: no increase in lifting capacity, as the hydraulic system is fitted with a pressure relief safety valve.)
175 bar (175 kg/cm2)
Maximum pressure 220 bar (220 kg/cm2)
Lubricatable bushings or link bearings in all joints Yes/standard
3-point adaptor for 3-point hitch 28 mm category 2: 825 mm between attachment points of hydraulic arms
Weight, including grapple, rotator and 3-point adaptor 751 kg 834 kg 1 005 kg 1 059 kg
Weight, 3-point adaptor 280 kg
Weight, grapple 79 kg 83 kg

Grapple lifting capacities as functions of outreach, horizontal crane arm, kg

Crane model

1.0 m 2.0 m 3.0 m 4.0 m 5.0 m 5.3 m 6.0 m 6.3 m 6.7 m 7.0 m 7.5 m
5.3 m  2 520 1 840 1 100 844 524 481 - - - - -
6.4 m 2 500 1 820 1 112 824 504 461 360 330 - - -
6.7 m 3 575 2 603 1 590 1 178 721 669 505 472 426 - -
7.5 m 3 565 2 593 1 580 1 168 711 659 495 462 416 351 243

Crane model

1.0 m 2.0 m 3.0 m 4.0 m 5.0 m 5.3 m 6.0 m 6.3 m 6.7 m 7.0 m 7.4 m
5.3 m 2 720 1 520 1 132 761 432 370 - - - - -
6.4 m 2 700 1 500 1 112 741 412 350 319 309 - - -
6.7 m 3 861 2 174 1 590 1 060 589 501 456 442 406 - -
7.5 m 3 851 2 164 1 580 1 050 579 491 446 432 396 331 223

All lifting capacities have been stated as useful grapple load, i.e. load in the grapple.



Why should I buy a K.T.S Timber Trailer when so many others are available?

  • Large load area: 2.35/2.80 m2. The load area is an actual measured value.

  • You can choose between telescopic and folding support legs. The customer decides how the trailer is to be fitted.

  • Modest width requirements - 2.20/2.40 m maximum width.

  • Rigid double frame suitable for platform mounting.

  • Can be equipped with a dumper platform.

  • Fold-down support legs made from 100 x 100 mm square-section tubes. Fastening points reinforced in order to withstand high loads.

  • The positions of the hydraulic steering cylinders are well protected, in order to prevent damage by impact.

  • The hydraulic cylinders on the fold-down legs are positioned for maximum protection, while allowing maximum freedom of movement for the legs.

  • The fold-down support legs retract to a position completely inside the profile of the gate.

  • Both the crane and the trailer have been designed by FEM analysis for maximum strength, economy of materials and low weight.

  • Hub motor operation is an option, which enables the trailer to move forward more easily under difficult working conditions. You may also use snow chains on the driving wheel or even put caterpillars onto the bogie. This is shown in a separate brochure.

  • Large wheels provide excellent load-carrying capacity, reducing the rolling resistance of the trailer and therefore reducing the load on the tractor.

  • Large, practical box for chain-saw and oil container.

  • Steerable front joint as standard, increases accessibility in the forest and reduces damage to growing trees.

  • Hinged stakes protect trees from impact by unloaded trailer.

  • Larger loading space with wider supports and frame extension for a better economy when transporting brushwood.

  • Very substantial climbing box-section bogies, with single through axles carried in lubricatable bushings to ensure many years of problem-free operation.

  • Generous ground clearance increases accessibility and reduces the risk of becoming trapped.

  • First-class surface treatment ensures that your investment retains its finish, despite years of hard use and outdoor storage.

  • Well-established company - K.T.S dates back to 1951 - means safety for you as a customer.

  • K.T.S Timber Trailers, Hydraulic Cranes and instruction manuals are CE-certified.

  • Considering the above there is really no choice: K.T.S Timber Trailers.


Order a very detailed colour brochure and price list free of charge! Click below!



Contact K.T.S Maskiner

Phone:      +46 19 58 50 10
Fax:  +46 19 57 42 33
E-mail:  info@kts.se

our attempts to continuously improve our products, K.T.S Maskiner and the manufacturer reserve the right to change the design and specifications of the products whenever they consider it appropriate, and without prior notification.

Reprinting of the text and pictures in this website in its entirety or parts thereof is forbidden, and offenders will be prosecuted.



Why should I buy a K.T.S Hydraulic Crane when so many others are available?

  • The K.T.S transferable 3-point adaptor makes it easy to transfer the crane between the trailer and the tractor. This enables the crane to be used for other purposes, e.g. for lifting bulk-bags, loading fertilisers or for use as a building crane.

  • Equip the K.T.S Crane with additional digging equipment and you get a very useful digging device at a low cost, to perform less advanced tasks and supplementary work.

  • The crane may also be equipped with a cutting head with up to 5.95 m reach.

  • K.T.S creates an additional value to your timber trailer investment by offering you the possibility of using it for a variety of tasks.

  • All K.T.S cranes are fitted as standard with a K.T.S Comfort Joint, which considerably simplifies use of the crane and makes work easier.

  • Excellent accessibility - the crane can reach timber in front of the tractor, close to the gate or close to the support legs.

  • Cast steel slewing house, 290 mm high. This increases the distance between the bushings, thus increasing the strength of the crane for use when lifting heavy logs, hard use or when the crane is fitted with a digging head.

  • Choose the height of the crane pillar in order to make the K.T.S Crane suitable for mounting on tractors, forwarders and trailers currently on the market.

  • Both the boom and the crane arm are made from high-strength structural steel, for high strength and consistent quality.

  • All hydraulic cylinders are mounted on the top of the crane, with all hydraulic hoses run internally. This avoids the risk of damage and resulting expensive repairs.

  • On the cranes with extensions - the 6.4, 6.7 and 7.5 m cranes - the inner section moves on adjustable bearings in order to minimise play and increase strength.

  • All pins are over-sized in order to withstand high loads. All joints have either bushings or spherical bearings.

  • High lifting capacity of the grapple, suitable for heavy logs. Note that the K.T.S specification is for the net load in the grapple, while many other manufacturers indicate the lifting capacity without a grapple or rotator.

  • The very substantial box-section 3-point adaptor is also very important when the crane is fitted to the tractor's 3-point hitch. This means that the loading on the tractor's hydraulic arms and link arms is reduced.

  • The fixing point for the support legs is naturally on the centre line of the crane post, in order to ensure maximum stability of the crane while loading.

  • Full rotation of the rotator.

  • Can be fitted with a hydraulic winch, which can also be radio-controlled.

  • The grapple is made from Swedish Domex steel in order to last longer.

  • It is possible to fit plates in the grapple to make it a very useful grapple bucket.

  • Also suitable for use with tractors with limited hydraulic capacity.

  • All joints have lubricatable and replaceable bushings or link bearings.

  • Well-established company - K.T.S dates back to 1951 - means safety for you as a customer.

  • K.T.S Timber Trailers, Hydraulic Cranes and instruction manuals are CE certified.

  • Considering the above there is really no choice: K.T.S Hydraulic Cranes.