DUUN PA20 User manual

PA20 Instruction manual
Duun Industrier as
7630 Åsen, Norway
www.duun.no

2
Congratulations on your Duun PA20.
All Duun tractor operated machines have been engineered and tested in close cooperation with
representative users to produce functionally safe and user-friendly machines.
Please read this instruction manual before using the machine.
Good luck!
Machine identification
Serial number and manufacturer are specified on the metal plate (F)
Always state the serial number in all inquiries regarding service.
The machine is CE marked (G). This confirms that the machine is designed in accordance with
the EU machinery directive.
Serial number
Time of delivery (month/year)

3
CONTENT
MACHINE INDETIFICATION 2
SAFETY 4
WARRANTY TERMS 7
SLURRY MIXER ADAPTER TECHNICAL DATA 8
ASSEMBLY INSTRUCTIONS 9
ROTATING SHAFT 9
SLURRY MIXER ADAPTER WITH MIXER AND TOWER ASSEMBLY 10
SERVICE AND MAINTENANCE 11
SHEAR BOLT COUPLING 11
DISCONNECTION 11
GAS HAZARD 12
DECLARATION OF CONFORMITY 13

4
Safety
All operators, mechanics and the owner must always work carefully with agricultural machinery.
Read and observe safety instructions in this instruction manual.
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.
Safety of the surroundings
Be very careful when other people or animals are near the
machine or tractor. Never start the machine when there are
people or animals close to it, also never stand between the
tractor wheels and the machine!
Be very careful during maneuvering and installing
Ensure that no one is in the pump's operating radius or
"impact area" during installing and maneuvering.
Safe connection and use
Do not allow anyone to stand between the machine and the
tractor when the machine is connected to the tractor. The
same applies when using the machine. Ensure that the
connection is made in a secure manner.

5
Power transmission shaft
The tractor is disengaged and the handbrake is applied
before the shaft is connected to the tractor's PTO. Max.
PTO speed is 540 r.p.m. Make sure that there is the same
angle in both joints (ie the pin on the tractor is parallel to the
pin on the gearbox). Different angles cause imbalance,
vibrations and increased wear. The power transmission
shafts must always have protective covers that were
originally supplied. Damaged and worn covers must be
replaced immediately!
During raising and lowering of the rod pump, the power
transmission shaft is dismantled.
Safety in case of interruptions and maintenance
Always remember to stop the tractor engine and remove the
ignition key before greasing, adjusting, cleaning or carrying
out repairs. This is to ensure that the tractor does not start
before you have finished.
Crushing hazard for hands and fingers with rotating
parts
Protective covers must always be fitted except for necessary
maintenance and always with the engine stopped. Pay
particular attention to the risk of crushing at points marked for
this.
Work noise
The noise level during use of the propeller depends on the
tractor's general noise level and the acoustics at the
workplace itself. In certain cases this can exceed 85db. In
such cases, the operator must use hearing protection.
Gas hazard!
During the stirring of slurry, gas evolution occurs which in
strong concentrations can be fatal for humans and
animals. Follow the following safety regulations to avoid
injury! - Avoid air flushing during stirring as far as
possible!- Never go down into a slurry container without
being absolutely sure that all gas has been removed (can
be checked with a gas meter that is submerged with a
string) - Never work alone in a slurry container - be at least
two people and use a safety harness - lifeline. - Use a
fresh air mask! -open doors that the gas has low outlets in
the farm building itself during slurry processing.
Check the state of health in the farm building continuously
during slurry handling!
Avoid any unnecessary stay near the slurry chute and
propeller during stirring.

6
Contact with live wires etc. during transport
Be aware that the propeller can stick out over the tractor
during transport and there is a risk of contact with live
wires - railway underpasses during movement!
Safe transport
The propeller has a very long turning radius behind the
tractor. This can cause dangerous traffic situations when
exiting and turning on a busy road. Please be aware of this
and avoid situations such as outlined. During
transportation over long and busy distances, the propeller
should be transported on a tractor trailer or similar.
Steep hazard during manoeuvring
The propeller forms a long weight arm behind the tractor.
This means that during removal from storage it can lift up
the tractor at the front. The problem can be remedied with
front weights or other load at the front of the tractor
(loader). Pay particular attention to this and avoid quick
maneuvers during removal from the slurry storage.
Risk of spraining the power transmission shaft
It is important to adapt the length of the power
transmission shaft to each individual tractor. If it is too
long, the shaft can be pressed completely together and
there is a risk that either the pin on the propeller shaft or
the pin on the tractor will be destroyed.

7
Warranty terms
Duun slurry mixer adapter has 12 months guarantee against defects in materials and
workmanship.
Parts that are not originally manufactured by Duun Industrier as, for example, wheels, hydraulic
parts, etc. are subject to these suppliers’ guarantees and terms.
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 based on the guarantee.
In this context, the following information must be recorded:
•Product name
•The product’s serial no. (see the machine identification)
•Date of sale
•The product owner’s address, telephone no.
•The seller with address, tel. 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 as 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.
Duun Industrier as reserves the right to modify the design and specifications and/or make
alterations and improvements without notification.
What is not included in the guarantee:
•The guarantee does not cover economic loss as a consequence of interruptions.
•The guarantee does not cover consequential loss due to defects.
•The warranty does not cover damage to galvanization as a result of mixing in acidic liquids.
•The guarantee does not cover defects or damage caused by misuse and uses that are not
in accordance with the instruction manual’s specifications and guidelines.

8
Slurry mixer adapter technical data
Features
Slurry mixer adapter
Net weight
Approx.170 kg
Width
994 mm
Height
723 mm
Length
2070 mm
PTO shaft input speed
1000rpm

9
Assembly instructions
Rotating shaft
Before connecting the power transmission shaft, ensure the following points.
Make sure that the shaft's protective tubes are intact and the two halves of the shaft fit freely into
each other.
The length of the power transmission shafts must be adjusted thoroughly, if it is too long it can
damage the bearing in the tractor's PTO or the propeller's bearings. Also ensure good lubrication
of the profile pipes. Read the instruction manual for the power transmission shaft.
Check if the PTO shaft can be rotated by hand to ensure it is not buckling anywhere.
Ensure that all shaft covers are in good condition and correctly fitted. Never start the machine
without this being in order! Pay particular attention to the plastic covers on the power transmission
shaft. If these are damaged, they must be replaced immediately! The locking chains for the plastic
covers must always be attached to suitable fasteners on the mixer to prevent the covers from
rotating. The covers are lubricated according to the specified interval.
Mount the PTO shaft on the tractor's PTO with the shear bolt coupling against the propeller
agitator. The wide-angle joint on the shaft must face the tractor. Safety chain is attached to the
propeller to prevent rotation of protective covers.
The power transmission shaft must always have a shear bolt coupling max. 4180 nm.
Check that the power transmission shaft will not sit in tension when the machine is lifted to the
max. or min. height. Also, note, the angle of the shaft can be too large when using very short
shafts - contact the supplier - importer.

10
Slurry mixer adapter with mixer and tower assembling
The slurry mixer adapter can be used between tractor and slurry mixer or between slurry mixer
tower and slurry mixer.
Connection between tractor and slurry mixer is made by connecting the slurry mixer adapter to the
tractor before it is assembled with the slurry mixer.
Using slurry mixer adapter between a slurry mixer tower and a slurry mixer, the slurry mixer
adapter and slurry mixer are assembled first. This is then mounted together with the slurry mixer
tower by lifting the mixer and adapter with a crane or other lifting equipment, that the adapter can
be connected to the tower.

11
Service and maintenance
First of all
Before cleaning, lubricating, repairing or
adjusting the machine, stop the engine and
activate the handbrake and remove the key
during work. Pay special attention to safety
during maintenance work, park the machine
in accordance with specified safety rules.
Subsequent inspection of screw
connections. Screws - nuts - nipples and
bolts on the machine must be tightened after
two hours of operation.
Clean after use
The slurry mixer adapter is cleaned with
a high pressure washer after use.
Lubrication of bearings
The adapter has two bearings marked (A).
Interval: Every 100 operating hours.
Recommended amount 7-8 grams per time.
It is very important the bearings
have a new supply of lubricating grease when
the stirrer is "set aside" after stirring to
prevent fertilizer damage in the bearings.
Power transmission shaft
When the wide-angle shaft works with fixed
angle, the lubrication interval should be 2-4
hours to ensure that the shaft has
sufficient supply of lubricating grease.
Interval: Every 2-4. operating hours.
Maintained in accordance with the attached
instruction manual.
Please contact supplier if this is missing.
Grease quality: Universal grease of good
quality.
Shear bolt coupling
Remember to lower the machine, stop the tractor's engine and disconnect the PTO before fitting a
new shear bolt. Bolts in the form of hexagons are used here. Screw M12x65 qual.8.8.
Disconnection
This happens in the opposite order of connection.
Working on the machine and the PTO shaft, the power supply to the tractor must be disconnected.
The machine must be placed on a level surface.
The power transmission shaft must be disconnected and hung on a hook attachment.
Locking bolts for drawbars released.
The machine is now disconnected and can be left.

12
Gas hazard
1. Measures and points in connection with slurry gas.
2. Extraction fan in the basement contributes to negative pressure and extracts the gas.
3. If there is an open connection between the cellar and the animals housing, the grates can
be covered with plastic to contribute to negative pressure when an extraction fan is used. A
gas-tight connection between the animals housing and the basement provides greater
security, especially when combined with an extraction fan in the basement.
4. Stir under wind - if possible with open windows and doors and closed gate.
5. If the discharge from stirring flows into the surface of the slurry storage, strong gas
development occurs - especially in the starting phase. This is due to mixing of air and
slurry mass.
6. Open doors in the barn and the gas will have a low outlet in the farm building itself.
7. Use a gas meter at all times in the animal rooms during slurry pumping. We believe this is
absolutely necessary regardless of the type of pump and whether or not you have a tight
connection.
8. Avoid unnecessary stay near the shaft and propeller during slurry release/stirring.
We therefore recommend the IBT article (Department of Technical Sciences ÅS/NLH) no.
33/87 "measures against slurry gas poisoning" for more details.
9. Never stir in calm and windless weather!
10.Ensure proper ventilation in animals housing. Let all fans run at full blast, remember, all
doors and windows must also be opened.
11.Make sure that ventilation fans do not draw air from the pump inside. If there are openings
in the gate or pump sump and the wind direction blows against these, slurry gas can be
forced from the basement up into the barn.
12.Do not stand near the filling opening of the transport tank during filling, or in the pump pit
during stirring.
13.Never enter animals housing where there may be suspicion of slurry gas without a gas
mask with gray filter B. Remember that there must be enough air present even when you
use a mask!
14.Never go down into a slurry cellar or tanker without fresh air equipment.
15.If possible, agitation should be carried out when there are no animals inside.
16.Stir gently. Remember that new equipment can cause the effect to increase so that the
stirring becomes more powerful and the risk of a gas accident increases.
Points 9-16 ref. Agriculture's HSE service.
www.lhms.no

13