DUUN VM320 User manual

Fire wood processor VM320
Instruction manual
Duun Industrier as
7630 Åsen, Norway
www.duun.no

2
Congratulations with your Duun VM320 firewood processor.
All Duun tractor operated machines have been engineered and tested in close cooperation with end
users of our products. This in order to develop reliable and user friendly machines
Please read instructions manual before you start using the machine.
Machine identification
Serial number and manufacturer should be indicated at badge (A)
Register serial No and time of delivery as indicated.
Do always specify serial number every time requesting service for the machine.
The machine has a CE-badge (B) this confirms that the machine has been manufactured in
conformity with: Directive 2006/42/EC Machinery.
.
Serial number
Time of delivery (month-year)

3
Contents
MACHINE IDENTIFICATION 2
TIME OF DELIVERY (MONTH-YEAR) 2
SAFETY 4
WARRANTY TERMS 9
DELIVERY FORM FOR DUUN VM320 FIREWOOD PROCESSOR 10
SPECIFICATIONS 11
TRANSPORT AND PREPARATION BEFORE USE 13
HYDRAULIC OIL -QUALITY.14
OIL LEVEL CHECK.14
OIL TEMPERATURE CHECK 14
CONDENSE CHECK 14
PTO SHAFT 15
PRACTICAL USE 16
CONDITION 16
START-UP AND SUITABLE ROTATING SPEED –380 –400 RPM 16
LET THE MACHINE RUN FOR SOME MINUTES BEFORE YOU START THE HYDRAULIC FUNCTIONS 16
MAIN FUNCTIONS –MAIN HANDLE 17
MANUAL KNIFE MOVEMENT 17
FILLING SAW CHAIN OIL 17
SAFETY HAND OPERATED LOG HOLDER 18
WHEN YOU WANT TO CUT TWIGGY OR CROOKED LOGS,IT IS IMPORTANT TO MAKE SURE THAT THESE ARE SECURELY PLACED.USE
THE HAND OPERATED LOG HOLDER AS MUCH AS POSSIBLE DURING CUTTING OF SUCH WOOD MATERIALS TO PREVENT THAT
FINGERS/HANDS ARE SQUEEZED 18
ADJUSTING CUT LENGTH 18
CHAIN SHARPENING AND TIGHTENING 19
SERVICE AND MAINTENANCE 21
EVERYDAY MAINTENANCE AND INSPECTION 21
WEEKLY MAINTENANCE 22
MONTHLY MAINTENANCE 23
YEARLY MAINTENANCE 23
DECLARATION OF CONFORMITY 24

4
SAFETY
All operators, mechanics and the owner must be well acquainted with the instruction in this instruction
manual before the machine is taken into use.
You should always work with care when you employ agricultural machinery. Read and observe the
safety instructions in this binder. Your safety is your responsibility!
Be particularly aware of warning signs with this symbol it marks measures
that must be carried out in order to avoid accidents. The symbol appears in
the instruction manual and on warning signs on the machine.
Instruction manual
All operators, mechanics and the owner
must be well acquainted with the instruction
in this instruction manual before the
machine is taken into use.
The safety of the surroundings
Make sure that no one not concerned are
present in the area of work. We emphasize, as
strongly as possible that only one person is to
handle the machine, i.e. operate the saw chain
sword and the splitter. Nobody is to assist the
main operator in the work area - risk of injury!
Never start the machine when there are people
or animals close to the machine or the tractor.
Never stand between the tractor wheels and the
machine!
If other persons than the operator of the
machine are present in the risk zone, the
operator is to explain the danger the machine
involves!
Personal protection equipment
You should always wear hearing protection and
protective goggles when using the wood
machine. Further, you should use protective
footwear and sturdy work gloves during handling
of the machine and the materials.

5
Clothing and the drive shaft
Do not work in clothing that may be caught by
the moving parts of the machine (for example
scarf, wide coats).
The tractor must be disconnected and the hand
brake activated before the shaft is connected to
the tractor’s power take-off. The drive shafts are
always to be equipped with original protection
covers.
Damaged and worn covers are to be replaced
immediately!
Make sure that all covers for the shaft are in
good condition and correctly fitted. Never start
the machine when this is not in order. The
locking chains for the plastic covers are always
to be fixed to the appropriate brackets in order to
prevent the covers to rotate.
Safe connection and use.
Allow nobody to stay between the machine and
tractor when the machine is connected to the
tractor. The same applies during use of the
machine. Make sure that the connection is
carried out in a safe manner.
Safety in case of interruptions and
maintenance.
Remember always to stop the tractor’s engine
and remove the ignition key before you lubricate,
adjust, clean or carry out repairs. This is to
secure that the tractor does not start before you
have completed the operation.
Hydraulic high fluid pressure.
Be careful when you work with hydraulics. Wear
eye protection and gloves. Hydraulic oil under
great pressure may penetrate the skin and cause
serious infections. Visit a doctor if you have had
an injury. Ensure that no-one is standing close
by when hydraulic functions are performed

6
Rotating parts –risk of crushing
The machine’s rotating parts may cause severe
injuries. The same applies to risk of crushing
during operation.
All covers and protective equipment is to be fitted
on the machine during use. The user is
responsible if an accident occurs because of
defective protection.
Avoid all unnecessary stay in the working area
when the machine is in operation.
Never put your hand in behind the protective
screen even if the saw chain is in back position
Zero alcohol tolerance
Persons who are under the influence of drink or
drugs must not operate the machine. The same
applies to tired people who do not have full
control over their movements.
Contact with electric wires and similar during
transport.
Be aware that the processor may be taller than
the tractor during transport and there is a risk of
contact with electric wires, railroad underpasses
etc.!
Conveyor –conveyor belt
Avoid staying under the conveyor when this is
under tension in order to avoid injuries in case of
any uncontrolled downfall during use. Also, avoid
contact with the conveyor’s moving parts during
use.
.

7
Horizontal positioning and tidiness on the
workplace
Always place the machine as horizontally and
steady as possible to secure stable working
conditions.
Keep the workplace as tidy as possible. This
contributes to generally better safety against
unwanted events.
Area of application
The machines are only intended for production of
firewood from “pure” wood material without any
contaminants. It is not allowed to employ the
machine for other material such as construction
waste and similar with metal parts such as nails,
screws and similar. The same applies for
materials that are polluted with plaster and
similar coatings. The saw chain is only designed
for wood materials without contaminants.
Good lighting –a necessity.
The machine must only be used in daylight that
secures a good overview of the operations –or
with artificial lighting, which provides good
overview of the work area.
Good lighting is very important with reference to
safety.
Safe transport
Before moving the machine both feeding belt and
the conveyor should be in upright position as
illustrated
The feed belt to be secured by a lash pin.
The conveyor to be secured by a locking bracket
close to the winch, ensuring that the conveyor do
not fold out during transportation.

8
Safe cutting
Avoid placing your hands close to the saw chain.
This is obtained by consequently using the log
holder A and the handle B to operate it.
For cutting the last log of wood, it is important to
retain a “suitable” length and cut a shorter piece
as the next to last..
You are advised to use the “count-down ruler” for
the last three lengths so that these may be cut to
a somewhat shorter even length than the desired
length.
When you want to cut twiggy or crooked logs, it is
important to make sure that these are securely
placed.
Before start-up after maintenance, you should check that all tools have been removed and brought
back into place.
Before the machine is elevated or lowered, you should check that no one is close to or touch the
machine.
If any warning signs are removed during repair or service, new signs must be fitted

9
Warranty terms
Fire wood processor VM320 has a 12-month guarantee against defects in materials and
workmanship.
Parts that are not originally manufactured by Duun Industrier AS, for example shafts, bearings etc.
are subject to these suppliers’ guarantees and terms.
Parts that are considered to be wear parts are not part of the basis of the guarantee - these have
been specified in a separate survey on the bottom part of this page.
In cases where a repair is considered to be covered by the guarantee, the representative must inform
the supplier’s representatives that the repair is intended executed on the basis of the guarantee.
In this context, the following information must be recorded:
Product name
The products serial no. (see the machine identification pp. 6 and 7]
Date of sale
The product owner’s telephone no.
Dealer with address, telephone no.
In case of such a repair, the supplier is presented with a claim within 3 weeks after the repair date.
Replaced parts are to be kept until a decision has been made with reference to the claim and the
replaced parts are to be forwarded to Duun Industrier for assessment if so required.
As the employment of the product is beyond our control, we may only guarantee the quality and do
not accept liability for the product's general performance.
The guarantee liability assumes that the prescribed maintenance has been carried out.
Duun Industrier reserves the right to modify the design and specifications and/or make alterations
and improvements without notification.
What is not included by the guarantee
The guarantee does not cover economic loss because of interruptions.
The guarantee does not cover consequential loss due to defects.
The guarantee does not cover defects or damage caused by misuse and use that is not in
accordance with the instruction manuals specifications and guidelines.
The following parts and material are considered as wearing parts and are not covered by the
guarantee:
.
The chain saw bar
The saw chain
The wood splitter knives
The feeding belt
Oil filter
Hydraulic oil
Filter cartridge for hydraulic oil
Wear parts in splitting mechanism

10
Delivery form for Duun VM320 firewood processor
Machine specifications
Model _ _ _ _ _ _ _ _ _ _ _
Serial No.. _ _ _ _ _ _ _ _ _ _ _
Customer details
Machine owner _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Address _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Aip code. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Town _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Hand over of machine
Sales representative and customer have controlled that the machine do not have any transportation damages and that
specified equipment is delivered..
The customer has been instructed how to use the machine:
General safety (page 4-8)
-How to prepare machine for use from transport position. (page 13)
-Height adjustment of machine and correct length of pto to reduce strain
-from too steep angle between tractor and processor (page 15)
-How to control temperature and oil level. (page 14)
-How to control eventual condensation level in oil tank (page 14)
-What is correct pto speed . (page 16)
-The machine functions.
Feed belt: Speed adjustment . (page 17)
Cutting : Adjustment of saw movement speed and power (page 17)
Sharpening and tightening of chain. (page 19)
Adjustment of chain lubrication (page 20)
How to use log clamp. (page 18)
Splitting: Main functions (page 17)
Elevation of splitting knives and change and splitting knives (page 17)
Sales representative and customer have read about service and maintenance (page 21-23).
The customer has been introduced to warranty terms (page 9)
The customer has been introduced to conditions for practical use (page 16)
Part list is available at sale representative.
Place _ _ _ _ _ _ _
Date _ _ _ _ _ _ _
Customers signature Sales representatives signature
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

11
Specifications
Feature
VM320
Cutting diameter max
32cm
Splitting force
5600 kg
Chain drive
Hydraulic
Log cut length
20-50 cm stepless
Saw chain type
1,6 mm
Chain speed
23 sekundmeter
Size saw chain
0,325"
Saw chain links total
73 links
Weight
Ca 600 kg
Mowing log stop
Yes
Height of work table F
880-960 mm
Splitting knife
4-part
Rinsing conveyor
Yes
Saw chain lubrication
Separate pump
Knife adjustment
Manual
Number og hydraulic
pumps
1
Feeding belt
Hydraulic
Conveyor length
4000 mm
Conveyor sidewards
movement
Firm position
Maximum height E
2315 mm
Maximum width C
2394 mm
Depth transport position
1260 mm
Saw chain oil container
2,5 liter
PTO-speed
400 rpm
Hydraulic oil volume
40 liter
Accessories
Item No.
Triangel quick connect
1252637
HMV quick connect
1252638
Log rack manual
141409001
Log rack hydraulic
141409002
Connection kit for
hydraulic log rack
141329050

12

13
Transport and preparation before use
1Pull the carrier (A) so that none of these
touches the covering lid at the bottom inside the
conveyor.
2 Bend the conveyor at the middle and fold it.
3 Pull the chain from the lower side of the bent
conveyor (B) and fasten the chain with the yellow
hook (C)
4 Pull the chain from the upper side(D) and put
all slack into the middle of the bent conveyor (E )
5 Tighten the conveyor with the winch (F)
6 Lock the conveyor with the bracket (G)
ensuring that the conveyor do not fold out during
transport
7 Lift the feed belt to upright position and secure
position with a latch pin.
The VM320 body is equipped with a fork pocket
for handling with forklift truck or pallet trucks. Be
aware that one individual machine weighs about
600 kg. Use lifting equipment designed for such
total weight
The conveyor should be prepared for use by
following the instructions in opposite direction
The feed belt to be placed in working position by
removing the latch pin.
The feed belt is correctly tightened when feeding
logs and not spinning.
If the tightening is to tight wear will increase and
reduce life time significantly.
The belt to be adjusted by screws placed at the
end of the belt.

14
Hydraulic oil - quality.
The machine’s performance will, to a high degree, depend on
keeping the hydraulic oil intact. The greatest elements of risk for the
quality of the oil are
Excessively high temperature which entails poor lubrication
performance and risk of faults and break-down of expensive
components such as valves, pumps and motors.
Condensation which is formed during conditions including
humid air combined with temperature fluctuations. (the oil
tank breathes through the filter and sucks in humid air)
Condensation water in the oil has the same effect as
excessively high oil temperature. Condensation appears
mainly during use in conditions involving humid air and
temperature around 0°C. The oil tank is equipped with a
draining plug for changing oil and checks for condensation
Oil level check.
The machines are filled with 40 litres hydraulic oil from the factory.
Recommended oil quality is ISO VG46 (viscosity group 46).
Examples of such oils are Ambra Hydrosystem 46 HV, Mobil
DTE15m, Statoil Hydraway HVXA46.
The oil level must be checked by observing the sight glass which is
fitted directly to the tank.
Oil temperature check
It is very important to keep track of the oil temperature and avoiding
situations exceeding 70°C. This can occur during unfavorable
conditions among other too high pto speed during operation. Do
never exceed 400 rpm pto speed.
Condense check
The oil tank is equipped with a drainage plug in the bottom Grey oil
is an indication of water in the oil. (watch page 20)
Hydraulic oil to be changed every year or after 500 working hours
(what first occurs) in order to ensure maximum oil quality.

15
PTO shaft
The pto shaft must be maintained and used according to the manual.
In order to obtain better operating angle, you may let the machine stand by itself and place the tractor
at a distance and employ a longer drive shaft during operation.
The size and length and the pto shaft depends on the size of tractor and length of the linkage arms.
If there are great angles, it might be advantageous either to lower the tractor or elevating the machine.
Ensure that the pto shaft has sufficient length. The profile tubes in the shaft are, after any cutting, to
have overlap by half the tube length. Any cutting of the shaft must be executed in accordance with the
instructions for such operations –the cut must be trimmed for burrs both on the inside as well on the
outside and the profile tubes should be well greased. Too short telescope length of the shaft entails a
risk of overload of the tractor’s power take-off and the gearbox of the VM320.
Please lubricate the PTO drive shaft before use.
The locking chains for the plastic covers are always to be fixed to the appropriate brackets in order to
prevent the covers to rotate.

16
Practical use
Condition
The machine may not be used before the
operator has done the following:
Has read the instruction manual and
knows how the machine works and how to
operate it.
Has made himself acquainted with and
observed the information regarding safety
described on pages 8 to 12 in the
instruction manual.
Employs suitable clothing; i.e. hearing
protection –protective goggles –
protective footwear –work gloves.
Does not use clothing that may be caught
by the moving parts of the machine (for
example scarf, wide coats).
If any faults occur in the functions of the
machine during employment, the machines is
to not to be used before the defects have
been repaired.
Start-up and suitable rotating speed –380
–400 rpm
The power take-off of the tractor is connected at
low rotating speed and increased slowly to 400
rpm which is the max rotating speed of the pto.
In order that the machine is to work at its
optimum, the rotating speed must be between
380 and 400 rpm.
At lower speed, some functions will receive too
low oil pressure.
Let the machine run for some minutes before
you start the hydraulic functions

17
Main functions –main handle
The main functions are
→ Make the feed belt run forwards
↓Activating the saw upwards - downwards
↑ Activating splitter. Step 1-Fast movement
Step 2-Power mode
The splitter returns when the handle is back in
neutral position.
It is important that the feeding of logs is moderate in
order to prevent the logs from bouncing back from the
log stopper.
Split stop
If the splitter do not manage to split the wood –press
the handle from you to step two activating power mode
increasing power and decreasing speed.
If the splitter still does not manage to split the wood, let
go the handle grip and the splitter returns automatically.
Open the safety shielding, release the wood piece, and
try again.
A tip is to place the cutting knife in the lowest position
reducing the demand for splitting power.
Manual knife movement
The splitting knife A is up- and downwards adjusted by
pushing the handle Bto the left or right.
How to change knife
Release the locking pin keeping the knife in position and
lift out. Insert a new knife and lock with bolt
Filling saw chain oil
The processor has a separate container Afor chain oil.
The chain is greased at every cut movement and it is
very important to supply oil before the container is
empty. Regular saw chain oil for chainsaw is
recommended.

18
Safety hand operated log holder
Avoid placing your hands close to the saw chain. This is
obtained by using the log holder B and the handle A to
operate it.
For cutting the last wood piece, it is important to retain a
“suitable” length and cut a shorter piece as the second
latest. During this operation, it is especially important to
use the hand operated log holder B by means of the
handle A so that the user does not receive an
unexpected backlash from the final piece.
When you want to cut twiggy or crooked logs, it
is important to make sure that these are
securely placed. Use the hand operated log
holder as much as possible during cutting of
such wood materials to prevent that
fingers/hands are squeezed
Adjusting cut length
Adjust the cut length by loosening the screws in position
A and adjusting log stop Bto correct cut length.

19
Chain sharpening and tightening
General
Blunt chains and “slant-sharpened” chains entail great wear on the chain bar and risk of extra costs
and complications.
In order to avoid this, Duun VM320 is designed so that the saw chain always must be dismantled
from the machine for any sharpening or replacement.
As a starting point, we recommend replacement of the chain or sharpening in equipment designed for
this purpose.
Alternatively, the saw chain may be sharpened in accordance with the standard procedure with a file
with file gauge for 4,8mm chain and rider gauge. This is to safeguard against faulty sharpening and
complications.
Before any sharpening work is initiated –stop the
machine and tractor and remove the key to
ensure unintentional start during the work
Always use work gloves during work with the
chain!
The covers over the chain bar and the cover over
the splitting cradle can be opened as illustrated

20
To replace the chain both screws Bare loosened
The screw Ato be release so far that the saw
chain can be hitched off for maintenance or
replacement.
In order to tighten the chain the loosened screws
B are still loose and screw Atightened.
Then screws Bto be tightened.
Inspect the tightening by pulling the chain
upwards at the middle of the saw bar. If you can
stretch the chain 4-5mm upwards, the tightening
is correct.
A new saw chain enlongs rapidly and must be
frequently inspected
File dimension 4,8 mm
The chain is now available for sharpening with a
round file from both sides. It is very important to
maintain the correct shape of the teeth as
illustrated. The main concern is to employ the
correct file dimension and make sure you
maintain the correct angle of the cutting edge –
i.e. 30 –35 degrees. Figure F shows the correct
shape of a sharpened tooth.
Also, remove damages from the saw bar and turn
the saw bar regularly. This in order to achieve
even wear on both sides.
.
Adjustment of the chain lubrication
The need for chain lubrication may vary with the average thickness of the wood material.
The lubrication is adjusted by releasing the connection (D) and turning the eccentric disk clockwise
(+) to increase the lubrication quantity per blow or the opposite (-) to reduce the flow.