THE IRON HORSE WITH GRAPPLE TRUCK

How does it work in practice?

We are currently being asked many questions about the use of järnhästen with a grapple loader trailer and several satisfied customers have also bought this concept and we believe there are many, many more who would benefit from this combination, but who hesitate a little about the decision. We therefore want to try to tell you a little more about what to think about and convey some of the knowledge and tips we have received and receive on the subject.

The concept of a lighter grapple loader trailer has long been used together with quad bikes or ATVs, but nowadays there are also opportunities for Iron Horse users to take advantage of the great advantages of the grapple loader function.
Together with the Iron Horse's track drive, you get a hard-to-beat combination in the forest.

Introduction

Newer Iron Horses are now almost always supplied with hydraulic functions both for functions of the machine itself but also for external hydraulics such as a grapple loader trailer. These grapple loader wagons, or ATVs as they are also sometimes called, are initially equipped with their own hydraulic unit with a small internal combustion engine and intended to be mounted on an ATV.

PICTURE OF ATV AND GRAPPLE TRUCK

It is basically possible to switch on any wagon that fits in size, but if you order an Iron Horse with grapple loader trailer today from Lennartsfors AB you get the following:

  •  Flex iron horse with 13Hk engine and hydraulic package
  •  Gripping strength (lever operation controls, valve package holders, etc.)
  •  Kranmans Gripper trailer with or without operation
  •  (Extra hydraulic package)

Link to product sheet Iron horse with Grapple loader trailer

Iron horse and Kranman's 1650 grapple loader trailer

Using Iron Horse with Grapple Truck

In forestry, needs and situations arise that require the right equipment. The iron horse was originally developed as a skidder to pull out timber and since then several accessories such as wagons, winch cranes, etc. have been developed. Especially when thinning and to pick up single logs, we believe the need for versatile equipment is especially important.

The wagon can also be parked in the woods to perhaps pick up those extra fine furrows on the other side of the wetlands where only a "naked" Iron Horse can take you. Once back on firmer ground, the logs can be unloaded and loaded onto the wagon for further transport. We call this the Flex method - you can find a specific description of this method here. Product sheet Flex method

Which carriage to choose?

In the development of the combination Iron Horse and Gripper Trailer, a few different models have been tested. The model we currently sell and recommend is Kranman's T1710 AWD with 30-40/50 Crane. (Without operation T1650).

Other make/models that may be up to date are avestavagnen's MS48 and Bonnet's Logtrailer 3200 QE.

If you want to choose another wagon, keep in mind that the iron horse's hydraulic capacity is a pressure of 140 Bar and a flow of about 18l/min and that you should not choose load weights above 1.6-1.7 tons. 

Should you have operation on the wagon or not?

With regard to the question of operation of the wagon, it should be borne in mind that the operation is carried out via a so-called Robson drive, with a steel wheel pressed between the bogie wheels of the wagon and that this is only intended to be used temporarily when driving downhill (up for access and downwards to brake). Activation of the operation takes place in Lennartsfors solutions via switches in the joystick. 

In order to understand the characteristics of the whole combination of Iron Horse and Griplasstar trailer, it should be taken into account that the Iron Horse itself is not driven by hydraulics but from the engine via a variable clutch or variator to a mechanical gearbox. The hydraulic unit is mounted directly on the engine shaft which means that the hydraulic flow follows the engine speed and not the actual speed from the gearbox. There may be situations where the carriage can be experienced to "drag" and sometimes "push" but in practice this is not a problem as it is more a matter of habit than a real limitation.

With easier driving you can do without operation, but it is still more important to load and adjust the movable tool mount so that maximum pressure ends up in the middle of the Iron Horse and we recommend choosing the possibilities for operation because then you also have the opportunity to brake downhill.

Special situations

When driving downhill and especially with heavy loads, you should be a little careful if you turn the Iron Horse too sharply as it risks setting itself 90 degrees relative to the direction of travel.

Reversing can also feel a bit unfamiliar but compared to an ATV you can basically turn the place around with the Iron Horse and the need to back up is minimized.

Voices from users

Our production manager Thomas Persson has himself bought an Iron Horse which he then supplemented with a wagon from Kranman and has used this combination during the winter mainly for thinning but also for driving out wind traps

Production manager Thomas Persson with his Iron Horse and Kranman's 1710 AWD

"Now I can easily use the Iron Horse both as a skinner and as a forwarder.
You have to think about having the tool mount in the right position for the different working moments, e.g. when you have to turn sharply uphill, it is best to have the tool mount as far forward as possible, other times you want to do the opposite, but it is easy with the hydraulics"
 

Some other tips:

  •  Contact Lennartsfors AB if you are about to supplement your Iron Horse with a trailer for discussion
  •  Do not refrain from purchasing the separate hydraulic unit normally included. Then you can use the cart on an ATV as well and the secondary value increases.
  •  Use the grapple loader as a ditch cleaner in hard-to-reach places.

Next step 

Lennartsfors AB
Mikael Swartz, CEO

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