JF-Fabriken A/S Feed Mixer and Dispenser Wagon JF FEEDER

JF-Fabriken A/S

Feed Mixer and Dispenser Wagon JF FEEDER PA 15 RTest Report 5095

Deutsche Landwirtschafts-Gesellschaft e.V.

Prüfstelle für Landmaschinen

SaleWilhelm Stoll Maschinenfabrik GmbH

Bahnhofstraße 21D-38268 Lengede

Telephone ++49 53 44/20-0Telefax: ++49 53 44/2 01 82

E-mail: [email protected]: http://www.stoll-jf.net

Manufacturer JF-Fabriken A/S

Lindeallé 7DK-6400 Sonderborg

E-mail: [email protected]: http://www.jf.dk

Short Description– towed, one-axle feed mixer and

dispenser wagon– mixing shaft driven by the tractor

PTO via a chain transmission; – mixing shaft equipped with spi-

rally arranged paddles with rub-ber scrapers;

– cylindrical mixing containerwith a hydraulically operated

metering slide and exchangeablestraw knives;

– lateral, fixed unloading chutewith a dispenser roller;

– electronic weighing system withthree weighing sensors.

(Description and technical data cf.Page 7).

1 = level control2 = Hydraulic height adjustment

of the mixing container3 = weighing computer

4 = dispenser roller5 = exchangeable straw knives6 = mixing container

Dec 2002 passed

DLG-Test Report 5095 2

Evaluation – Short Version

Tested Feature Test Result Evaluation

FillingUnloading capacity External filling

MixingMixing accuracy LW-grass/corn Chopped grass/corn Corn/pellets– half mixture 2,4 % 4,1 % 2,2 % +/�/�– full mixture 3,7 % 3,8 % 1,9 % �/�/�Mixing time 3 min after filling, longer mixing time recommended +Comminution effect sufficient; mashing entirely excluded � /++

Weighing +Weighing system can be used during filling +Accuracy (max./min. load) <1 and 4% deviation from the actual filling weight +Display swivellable; illuminated, digits 57 mm large +/++

Feed dispensingDispensing capacity large, though uneven �Swath deposition At some places, the swath is driven over �Emptying Feed residues in the mixing container –

Operation ++Coupling can be carried out quickly +Operation simple; easy to reach +Manoeuvring no view to the rear –Feed unloading easy to control from the driver´s seat +

Power requirements ++Mixing LW-grass/corn Chopped grass/corn Corn/pellets– maximum 41 kW 40 kW 28 kW– specific 7,4 kW/t 6,1 kW/t 4,5 kW/t ++/++/++

Maintenance +Lubrication points 22 (intervals cf. Page 10) +– Accessibility 18 freely accessible ++– Time requirements 29 labour minutes in 100 hours of use +Transmission oil SAE 80W – 90W �Instructions of use/list of spare parts clear/good +/+

Durability +Fatigue test on the test stand no damage after alterations by the manufacturer +Practical use no damage at mixing and dispensing units+

Work safety evaluated by DPLF

Traffic safety EBE report according to § 18 (5) StVZO

Evaluation range ++ / + / o / - / -- (o = standard); during mixing: + / o

The JF FEEDER PA 15 R allowshomogeneous feed mixtures to beproduced and dispensed. Themixing container has a volume of15 m_, of which only 12 m_ canbe utilized. For filling, commonwheel and front loaders or mobilecranes with appropriate unloadingtools can be used. The mixingsystem consists of nine spirallyarranged paddles. The paddles aretilted and were equipped with rub-ber scrapers. In addition, eightexchangeable straw knives are bol-ted to the mixing container. Theunloading chute with a dispensingroller, which is attached laterallyon the left front side of the contai-ner, is a pronounced feature.The tested model PA 15 R is equip-ped with a pneumatic two-circuitbrake. An EBE report according to§ 18 (5) StVZO (German MotorVehicle Safety Regulations) is avai-lable. When driving on publicroads and paths, one must makesure that the permissible maximumspeed of 25 km/h is not exceeded.

Filling

The rectangular container openingof the PA 15 R is sufficiently largefor filling. The mixing container iseasily accessible from the sides andfrom the rear of the wagon. Howe-ver, the wagon is filled exclusivelyfrom the left side. At the beginning,the rear part of the containershould be filled first, if possible.Towards the end of the filling pro-cess, the remaining feed quantitiesshould be distributed evenly overthe entire container length. Itdepends on the loading technologyused how large the filling capacityis.Correct operation must be givenparticular attention. In order toachieve a continuous and evenmixing effect in the longitudinaldirection of the container, thewagon must be as level as possible.For this purpose, the mixing contai-ner features level control. On thefront side, a sight glass filled withdark liquid is attached to the upper

right container edge. The containeris level when the liquid is concen-trated in the centre of the glass.Hydraulic height adjustment on thefront side of the mixing container isadvantageous and recommended.However, one must take intoaccount that the mixing containermay only get filled to 80% of itscapacity. The feed gets lifted by thepaddles and must fall down freely.If the container is too full, therequired free space is not available.As a result, the feed only gets tur-ned, not mixed.Special feed and loose bulk materi-als must be put in first. It evenmakes sense not to turn the paddleagitator on until filling with thesematerials is complete. Long materi-al, such as straw, should be addedwhen the container is about halffull. It should be adapted to themixture, and certain quantitiesshould not be exceeded. Entireround and square bales may neverbe put in as a whole. Only smallquantities may be put into themixing container and processedportion-wise.A lockable filler neck (figure 5)situated at the rear of the vehicleallows small or liquid quantities,such as molasses or water, to beadded from the bottom without any

problems. According to our results,the opening must be checked rat-her frequently because feed resi-dues build up there during themixing process.In order to guarantee clean feedloading, clamp silos should featurea foundation plate.

Mixing

In all tested mixing variants, the PA15 R reached the required mixingaccuracy. Depending on the con-tainer volume, full and half-fullmixtures were examined. It isremarkable that during mixing therotational speed of the PTO shouldbe limited to 400 min-1. Our limitfor maximum permissible devia-tions of ±10% for basal feed and±5% for feed concentrate at eachmeasuring point was observed(figures 2 to 4). After the last com-ponent had been added, mixingtime was limited to a standard peri-od of 3 minutes.


Test Results

Figure 1:The nine paddles mix the feed extraordinarily gently. The duration of the


Extraordinarily Gentle Mixing

The very gentle mixing process,which conserves the structure, isimpressive. In comparison withother mixing systems, the mixingtime is irrelevant. In order to achie-ve better mixing accuracy, themixing time should even be exten-ded. Upon the manufacturer´srequest, we prolonged the mixingtime for chopped grass/corn by anadditional four to a total of sevenminutes after the last componenthad been added. As compared withour standard measurement, wefound a significant improvement inmeasuring accuracy in both fulland half mixtures. The peak devia-tions at each measuring point werereduced. Average deviation was3.5 % in full mixtures and 1.6 % inhalf mixtures. Therefore, longermixing times are recommendedand very suitable for practical ope-ration.Due to the system, the comminu-tion effect of the PA 15 R is just suf-ficient. The eight straw knives inthe mixing container comminutelonger feed structures. During thisprocess, the feed is not cut, but rat-her torn apart.Feed treatment by the nine paddlesis extremely gentle. According toour results, very moist and lumpy

feed blocks should even be loose-ned first. Even if moist and structu-rally weak components are present,the feed is mixed very gently. Mas-hing can be excluded even afterlonger mixing times.Long, uncut hay and straw shouldbe added and processed only insmall quantities. We found that anexcessive share of uncut feed hadan unfavourable effect on the mix-

ture. Longer components can wraparound the agitator shaft. Therefore,long material should only be mixedin portion-wise and in the in thecorrect ratio. It is impossible to addentire uncut round bales. Smaller,highly compressed bales, however,can be thrown in as a wholewithout causing any problems.If the components are added in theright order, this helps considerablyto reduce the mixing time and toimprove mixing accuracy. At theend of the filling process, even feeddistribution over the entire lengthof the container also exerts a favou-rable effect on the mixing result.

Weighing

Three weighing sensors connectthe container of the PA 15 R to thevehicle frame. Even when thewagon is parked, weighing is possi-ble if the wagon is equipped withadditional electricity supply (bat-tery). During the filling process, thewagon should be as level as possi-ble. While the agitator shaft wasrotating, the weight displayedduring filling fluctuated by up to 30kg. The accuracy of weight measu-rement is dependent on the fillingweight. At the minimum quantity of100 kg and maximum load, we

Bild 2: Deviations during the mixing of loader wagon grass/corn-full/half;

mean deviation: 3,7/2,4 %.mixture: 2980/1940 kg; dM 35.8/33,6 %Grass silage: 1720/1200 kg; dM 41.9/36,7 %Corn silage 1260/740 kg; dM 27.7/28,7 %

Bild 2: Deviations during the mixing of chopped grass/corn -full/half;

mean deviation: 3.8/4.1 %.mixture: 3020/1,400 kg; dM 33.6/33.2 %Grass silage: 1700/830 kg; dM 37.9/36.8 %Corn silage 1320/570 kg; dM 28.0/28.0 %

full mixture: mean deviation: 3,8 %half mixture: mean deviation: 4,1%

measuring point

devi

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devi

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measuring point



measured deviations of 4 % and<1 %, respectively.The weighing computer is attachedto the front side of the container onthe left side of the wagon and canbe swivelled. The casing can beswivelled to the front and the leftside. Thus, the weight display isvisible from the driver´s seat andthe left side. The electronic remotecontrol of the ProFeed weighingcomputer has proved very advanta-geous because it enables the diffe-rent programs to be set from thedriver´s seat. The display is illumi-nated, and the red, 57 mm largeLED digits can be discerned verywell even from larger distances.

Feed Dispensing

At times, feed is dispensed inbouts. After a certain familiariza-tion time, however, it is possible todispense feed quite satisfactorilyover the entire dispensing distance.In contrast to mixing, this requiresthe faster PTO speed of 540 min-1.The spirally arranged paddles forci-bly convey the feed in a longitudi-nal direction towards the dispen-sing unit. A frontward inclination ofthe container has a positive effect.Therefore, the hydraulic cylinderwhich allows the mixing containerto be lifted and lowered is a useful

feature. According to our ownexperience, it is disadvantageous ifthe mixing container is inclinedtowards the rear, in particular at theend of the dispensing process. Thedispensed quantity must be adap-ted mainly by adjusting the posi-

tion of the metering slide, the dri-ving speed, and the rotationalspeed. A full wagon mixture can bedispensed within three minutes.We found that the feed flow decre-ases significantly towards the end.It was possible that the last 500 kgrequired as much time as the con-siderably larger quantity dispensedbefore. Even a higher PTO speeddoes not enable the container to beemptied completely.If large feed quantities are dispen-sed (feed dispensing once a day),feed is driven over at some places.Under these conditions, the adju-stable dispensing chute provesadvantageous because the feed isdeposited in a very loose swath.The mixing container features afinely stepped scale for the mete-ring slide, which ranges from 0 to6. It is attached to the left front sideof the container in the visual fieldof the driver so that it is well visi-ble. In practical operation, thequantities dispensed at differentslide settings were controlled byadjusting the engine speed and thedriving speed.

Figure 4: Deviations during the mixing of corn/pellets -full/half;

mean deviation: 1,9/2,2 %mixture: 4730/2440 kg; TM 49,0/52,8 %Corn silage: 4160/2030 kg; TM 43,5/45,5 %Pellets: 570/410 kg; TM 89,0/88,7 %

Overview 1: Operation

coupling – can be carried out quickly� trailer coupling, coupling of the drive shaft� connection of the electric and brake connections� connection of the hydraulic lines� installation of the control block in the tractor cab� retraction of the hydraulic sustainer

operation of all functions – simple; easily accessible� with the aid of a mechanical Bowden cable in the tractor cab� electronic remote control of the weighing computer� when the drive shaft is turned on, the agitator shaft is started� when the hydraulic system of the tractor is turned on, the hydraulic elements

are started

filling of the PA 15 R – possible without hindrance� no view of the rear of the wagon� container opening sufficiently large� filling only from the left side� addition of liquids from the bottom is possible

feed dispensing – easy to monitor� at the front on the left side of the container, easily visible from the driver´s seat� position of the metering slide easy to control from the driver´s seat due to a

scale on the front side of the wagon� finely stepped scale from 0 to 6; pointer well visible� complete emptying impossible


measuring point

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Operation

For an externally filled wagon, theoperation of the PA 15 R is simple,as usual. The control of the wagonwith the aid of a Bowden cable is astriking feature. The control ele-ments in the tractor cab are easy toreach from the driver´s seat andcomfortable to operate. However,the control block must be firmlyinstalled at an appropriate place inthe cab. At times, mounting anddemounting are awkward becausethe stiff Bowden cables with thecontrol valves are not easy to hand-le. In addition, the relatively smallopenings in the common tractorcabs are generally not largeenough for this purpose. The elec-tronic remote control for the weig-hing computer deserves praise.From the loading vehicle, one cancomfortably request the differentcomponents at the touch of a but-ton. In addition, the operator is notbound to a fixed order and canchoose freely among up to 40feeds.

Power Requirements

The power requirements of the PA15 R are very low. According to theoperating instructions, mixing andfeed dispensing require a rotationalspeed of 400 min-1 and 540 min-1,respectively. The power require-ments are mainly dependent uponfeed structure and the transmissionratio of the paddle agitator drive. Ata tractor PTO speed of 400 min-1

and 540 min-1, the paddles rotate6.3 times and 8.6 times, respective-ly. The measurement results areshown in Table 1.

Maintenance

The maintenance requirements ofthe PA 15 R are very low. The servi-ce intervals for the different lubri-cation- and maintenance pointsrequired by the operating instruc-tions are 10 to 40 hours. Table 2lists the necessary maintenancework for lubrication.The operating instructions are cle-arly structured and provide anextensive description of work with

the wagon. The German translationshould be revised at some places.The list of spare parts is clearlystructured and good.

Biodegradable oils can be used after consultation with themanufacturer.

Figure 6: The levers of the Bowdencable control are easy to reach fromthe driver´s seat and comfortable tooperate. However, this requires thatthey are firmly and stably installedat an appropriate place.

Table 2; Maintenance work Number/quantity

Lubrication points 22freely accessible 18can be reached while maintaining an upright posture 9need care after ca. 10 hours 16time required for lubrication per 100 hours of use 29 labour min

Table 3: Durability Requirements

– of the chassis during the fatigue test on the vehicle test stand fulfilled1)

– of the mixing- and dispensing elements during practical operation fulfilled2)

1) After alteration by the manufacturer, the chassis was enhanced.2) After a current total of 510 mixtures in practical operation.

Annotation: Chassis test according to the DLG test programme with aload of 4,000 kg and a total weight of 9,300 kg.

Feed components Mixture DM cont. max. power requirements specific power requirements

Loader wagon grass/corn 3400 kg 33,8 % 41 kW 7,4 kW/tChopped grass/corn 4940 kg 29,1 % 40 kW 6,1 kW/tCorn/pellets 5085 kg 46,8 % 28 kW 4,5 kW/t

Table 1: Power requirements at a rotational speed of the PTO of 400 min-1

Figure 5: The filler neck at the rearof the mixing container allowssmall or liquid components to beadded.


Description and Technical Data (measured values)

Design:Towed feeder mixer and dispenser wagonRated PTO speed during mixing: 400 min-1 / during feeding: 540 min-1

required hydraulic control valves on the tractor 1 single-acting, 1 free reflux, or 1 double-acting Operation mechanical (Bowden cable)Service brake pneumatic two-circuit brakePermissible maximum speed 25 km/hSustainer hydraulic

ContainerContainer volume 15 m3

Capacity 12 m3

Opening on top, length x width 4110 mm x 1870 mmThickness and kind of material Side wall: 6 mm, S 500 MC / Tub: 6 mm, St 37

Mixing systemPaddle agitator 9, with exchangeable rubber scrapers, chain drive, clockwise rotationrotational speed (at 400/540 min-1) 6,3/8,6 min-1

chain transmission 63:1straw knives 8

Weighing systemProFeed; Display swivellable; illuminateddigit height 57 mmstorable mixing programmes 10mögl. Komponenten beim Beladen/possible components during loading/portions during dispensing 20set quantity display nonenumber of weighing sensors 3weighing during filling yes

Dispensing technologylateral, fixed chute with a dispenser rollerroad clearance 250 mm, adjustabledispensing opening, width x height 915 mm x 700 mmmetering slide hydraulically operated

Lubrication oil, capacitieschain transmission, SAE 80W – 90W 4,5 litres

Special equipment (tested)wide-angle drive shaft, Bowden cable operation, hydraulic sustainer, pneumatic brake system, rubber scrapers, ProFeed weig-hing computer, approved according to StVZO.

Special equipment (not tested)feed dispensing on both sides, different elevator models, wireless data transmission from the ProFeed weighing computer

Main measurements and weightsLength: 6500 mm; Width: 2365 mm; Height, in transport-/work position: 2790 mmMounting: type, clearance: trailer hitch, 850 mmTyres Continental 385/65 R 22.5Track width 1740 mmOverall track measurements at the indicated tyre size 2125 mmGround clearance 195 mmPermissible total weight 9840 kgEmpty weight 5220 kgPayload 4600 kgPermissible tongue load 1570 kg


Deutsche Landwirtschafts-Gesellschaft e.V.Prüfstelle für LandmaschinenMax-Eyth-Weg 1, D-64823 Groß-UmstadtTelefon: 0 6078/96 35-0, Fax 0 6078/96 35-90E-Mail: [email protected]: www.dlg-test.de

Deutsche Landwirtschafts-Gesellschaft e.V.Prüfstelle für LandmaschinenLerchensteig 42, D-14469 PotsdamTelefon: 0 31/5 6702-0, Fax: 0 31/5 6702-90E-Mail: [email protected]: www.dlg-test.de

12/2002© DLG

www.dlg-test.de

Test

The test was carried out accordingto the DLG Test Frame for feedmixer and dispenser wagons.For the test, a feeder mixer wagonwas available during the 2001 fee-ding season.

During the test, a total of 510 loadswith altogether approximately1,670 t of feed were mixed anddispensed. Under our test condi-tions, the maximum load was5,085 kg, which meant that theindicated payload was exceededby 8 %.

Testing

DLG Test Station for AgriculturalMachinery, Max-Eyth-Weg 1, 64823 Groß-Umstadt

Measuring operation

W. Emig, Wald-Michelbach

Betriebsgemeinschaft Unter-Mossau, Mossautal

Birkenhof, Großostheim

Practical operation

Milchhof Weinheim, Weinheim-Hemsbach

Reporter

Dipl.- Ing. W. Sturmfels, Groß-Umstadt

DLG test committee

Dipl.-Ing. agr. W. Beck, Hammersbach

Dipl.-Ing. agr. Ch. Gers-Grapperhaus, Oldenburg

Dipl.-Ing. P. Kamps, Michelstadt

K. Scior-Walther, Mossautal

Published

with the support of the FederalMinistry of Consumer Protection,Food, and Agriculture.

Survey Result

In a survey, eight farms were askedabout their experiences duringpractical operation. The oldestwagon had been used for threeyears.All our results were confirmed bythe farmers. They primarily proces-sed chopped material and, in somecases, loader wagon grass and evenround bales. The very low powerrequirements were given the bestpossible rating. Complete mixinggenerally required approximately15 to 20 min. All farmers weresatisfied with the mixing result.Feed dispensing was criticized byeveryone. After a certain habitua-

tion time, however, all farmerswere able to cope with it. In somecases, those surveyed complainedabout incomplete emptying of thecontainer. However, this did notbother the majority of the farmers.Two farms criticized that the rubberplates of the paddles were brokenoff.All farmers questioned were satis-fied with the wagon and wouldbuy it again.

Work Safety

The feed mixer and dispenserwagon PA 15 R was evaluated bythe German Test Station for Agricul-

tural and Forestry Machinery(DPLF). Under the aspect of worksafety technology, there are noobjections to the use of this wagon.

Traffic Safety

The tested version of the PA 15 Rwas equipped with a pneumatictwo-circuit braking system. Typeapproval according to § 18 (5)StVZO (German Motor VehicleSafety Regulations) has been gran-ted. During road rides, one mustmake sure that the maximum speedof 25 km/h and the permissibletotal weight of 9,840 kg are notexceeded.

Documents

JF-Fabriken A/S Feed Mixer and Dispenser Wagon JF FEEDER