TESTING SERVICE OF FUNCTIONAL AND SAFETY
CHARACTERISTICS OF AGRICULTURAL MACHINES
TEST REPORT n° 03 - 031a
ROTARY TILLER: MAXI SQUALO 4200
(extensions: 03-31b – Maxi Squalo 4700; 03-031c – Maxi Squalo 5200)
MANUFACTURER: VALENTINI ANTONIO MACCHINE AGRICOLE
Via Visentin, 96 – 35012 Camposampiero (PD) - ITALY
Rome, November 2000
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Valentini - Maxi Squalo 4200
TESTS PERFORMED IN CONFORMITY WITH ENAMA METHODOLOGY N° 03 AT THE ISTITUTO
SPERIMENTALE PER LA MECCANIZZAZIONE AGRICOLA DI MONTEROTONDO - ROME, BY:
Manager
Test technician
Operators
Mr. Giovanni Santoro
Mr. Roberto Fanigliulo
Mr. Gino Brannetti
Mr. Cesare Cervellini
(ISMA - Rome)
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CONTENTS
MACHINE DESCRIPTION
3
ACCESSORIES
3
TECHNICAL DATA
4
TEST CONDITIONS
5
TEST RESULTS
5
REMARCS ON FUNCTIONALITY
7
RECOMMENDATIONS AND INSTRUCTIONS
7
ROAD CIRCULATION
7
SAFETY CHECK
7
MODELS IN THE SAME SERIES
7
THE FOLLOWING RULES WILL HELP UNDERSTANDING THE RESULTS:
♦ 1 MPa = 1000 kPa = 10 bar ≈ 10 kgforce/cm2
♦ 1 daN ≈ 1.02 kgforce
♦ 1 kW = 1.36 CV
♦ 1 m/s = 3.6 km/h
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Valentini - Maxi Squalo 4200
sisting of four models with variable
width from 4.2 m to 5.2 m. The soil is
tilled by 96 curved tines arranged in
groups of 6 per flange rotating on a
horizontal axis; further soil refinement
and levelling is performed by leveller
casings and packer rollers hinged to
the back of the frame.
MACHINE DESCRIPTION
The VALENTINI rotary tiller, mod.
Maxi Squalo 4200, is a hydraulically
folding mounted agricultural machine,
earth refining and seedbed preparation to complete the work of the
plough. The tiller examined, with a
theoretical working width of 4,20 m, is
part of the “Maxi Squalo” series con4
8
9
1
11
2
6
12
10
7
3
5
Figure 1 – Picture of the
tested machine and its
components:
1) three-point tractor linkage
support; 2) upper link connection; 3) lower link connection 4) cross shafts for
transmission of power to the
side transmission assemblies; 5) cardan shaft connecting to the tractor’s PTO;
6) side cardan shaft protection; 7) tiller tools; 8) rear
roller position; 9) hydraulic
cylinders for roller working
height adjustment; 10) front
guard; 11) identification
plate; 12) side slides.
ACCESSORIES
The machine may be fitted with:
♦ front surface subsoiler anchorage
points: adjustable, their purpose is to
remove caked earth from the tractor tyres;
♦ front depth subsoiler anchorage points:
adjustable, their purpose is to break up
any turf-forming plants in the soil and lift
them towards the rotors;
♦ hydraulic jacks for the adjustment of the
working depth of the rear rollers, directly
from the tractor cab;
♦ front pair of wheels: for a finer adjustment of working depth when rear rollers
are not fitted;
♦ left and right front small ploughshares:
placed sideways on the front beam, their
purpose is help the machine to penetrate
unploughed soil;
♦ ISO 2 cat three-point attachment with
hydraulic lifting: the PTO that comes
leaves the back of the gear box makes it
possible to operate a seeding machine
that can be raised above the tiller when it
is being transported or manoeuvred.
♦ Roller: 1. Cage type with polythene
coated spiral bar (Ø 495 mm): surface
levelling and refinement on all soils except
those that are particularly wet and sticky;
the bars can be partially removed depending on operating conditions;
2. triangular toothed packers (Ø 550 mm):
surface levelling and refinement on all
soils provided they are not particularly wet
and sticky;
3. spiropacker (Ø 500 mm): deep layer
compacting action, also suitable for sticky
ground;
4. spike-type (Ø 570 mm): depth checking
of all soils; it is fitted with long S shaped
pressed teeth, in sets of 4 per working
section;
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Valentini - Maxi Squalo 4200
TECHNICAL DATA
SERIAL NUMBER OF TESTED MACHINE 3024200
OVERALL DIMENSIONS
total width (mm)
total length (mm)
total height (mm)
working pos.
4560
1800
1430
transport pos
(folded section)
2480
1800
2240
FRAME
type
tractor coupling
sheet steel boxed section and steel
plates
three-point linkage ISO 2 cat
TRANSMISSION
from the PTO
main transmission
tools transmission
PTO speed
cardan shaft without torque limiter
final drive box with permanently engaged straight bevel gears
(24-30
teeth), in oil bath;
the cross transmission shafts leaving
the final drive box through cardan
shafts are connected to the tiller blade
rotors by means of side gear-cascade
type transmission assemblies
with
tools rotation speed of 258 rpm for each
section of the tiller;
1000 rpm
STANDARD TOOLS
type
width (mm)
thickness (mm)
total no.
n° per flange
flanges (n°)
centre-to-centre distance (mm)
diameter (mm)
tiller blade rotors
number (mm)
length (mm)
shaft diameter(mm)
diameter including tools (mm)
curved steel blades rotating on a horizontal axis and bolted on circular steel
flanges.
95
8
96
6
16
250
280
2
1970
108
520
RATED DIMENSIONS OF THE WORKED LAYER
maximum width (mm)
maximum depth (mm)
4200
280
BLADE ROTATION SPEED
standard gear couple
(24-30 teeth)
258 rpm;
(with PTO. at 1000 rpm)
AVERAGE POWER OUTPUT AT THE PTO (KW)
139
OVERALL MASS WITHOUT ACCESSORIES (Kg)
2050
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Valentini - Maxi Squalo 4200
TEST CONDITIONS
TRACTOR USED
The tiller was coupled to a four-wheel
drive tractor with the following characteristics:
♦ rated power
176.5 kW
♦ overall mass
9730 kg
♦ linkage
cat.3 ISO
The rotation speed at the power take off
used for the operation of the rotors was
set at 1000 rpm when the drive shaft
turned at 1903 rpm.
TEST GROUND
Tests were performed on slightly undulating ground that had been ploughed
previously at a depth of 0.40 m with a
rise of 0.18 m.
Before tilling was carried out the following
was determined: relative humidity (from 0
to 0.2 m and from 0.2 to 0.4 m in depth),
the average apparent density and the
average resistance to soil penetration
(from 0 to 0.4 m in depth) (tab. 1).
Skeleton (%)
Sand (%)
Silt (%)
Clay (%)
Liquid limit (%)
Plastic limit (%)
Plasticity index
Humidity 0 m ÷ 0.2 m (%)
Humidity 0.2 m ÷ 0.4 m (%)
Average apparent density
(g/cm3)
Average resistance to penetration (kg/cm2)
0
2.3
43.4
54.3
62.2
40.3
21.9
15.0
19.0
1.2
2.4
Table 1 – Physical-mechanical characteristics of the test soil.
TEST RESULTS
During the tests, after establishing the
best gear for the tractor (4th) compatibly
with the conditions for working the test
soil, engaging the double drive and
differential lock, moving the accelerator
lever to the position of maximum delivery, the functional and operational characteristics (referring to the hectare)
were established and are shown in table
2. The results of the analysis of the
breaking up of the soil by the tiller are
shown in figure 2.
The implement was fitted with a completely closed rear levelling casing and
caged rollers in order to prepare the
seedbed first sweep.
The specific average power output was
the same at 1.04 kW/m. cm (per operating width and working depth meter on
the worked terrain), while the average
specific force was 1.82 daN/m.cm (per
meter of effective width and centimetre
of depth on the worked terrain) with very
fast operation. Tractor slip was positive,
and was any way kept with in absolutely
negligible limits.
It can also be seen from table 2 how the
theoretical working width has been used
to 98,8%, while the depth of the worked
level is m 0.17 with soil settling at m
0.16.
From the examination in figure 2 it can
be seen that the passage of the tiller
over ploughed soil has meant outstanding refinement. The relative index
in fact went from 0.48 of the ploughed
soil to 0.82 of the tilled soil with a clod
reduction of 41.7%; furthermore it enabled the elimination of the large clod
classes to be eliminated and the aggregates less than 10 mm to 48% of the
total of the mass of the crashed soil.
The consequent “seedbed quality index”
(ratio between mass of clods with diameters ≤ 10 mm / mass of clods with
diameters > 10 mm) was 0.93 thereby
guaranteeing a good substrata for seeding and subsequent germination.
The joint effect of the rotary implements
and the rear casing levelled the soil well
and considerably reduced the roughness of the surface producing soil levelling of 85,0%.
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Valentini - Maxi Squalo 4200
Elements
Performance
average engine speed
average power take off rotation speed
average rotor speed
theoretical working width
effective working width
operating working width
use of working width
working depth on soil worked
worked layer
settling
worked section
effective work time
operating work time
operating yield
average effective speed
operating working capacity
hourly fuel consumption
unit fuel consumption
average traction force
average torque at the PTO
average power at the PTO
average traction power required by the soil
working *
total average power output required
specific average power output
tractor slip
(rpm)
(rpm)
(rpm)
(m)
(m)
(m)
(%)
(m)
(m)
(m)
2
(m )
(h/ha)
(h/ha)
(%)
(km/h)
(ha/h)
(kg/h)
(kg/ha)
(daN)
(daNm)
(kW)
2130
1119
289
4.20
4.20
4.15
98.8
0.33
0.17
0.16
1.37
0.53
0.64
83.2
4.55
1.57
36.8
23.5
253
118.5
138.9
(kW)
3.2
(kW)
(kW/m.cm)
(%)
142.1
1.04
1.3
Table 2 – average results obtained with the rotary tiller.
(*) Overall power output expended for the traction of the implement, excluding the loss of transmission due to forward
motion empty, sliding and the power output required for the tractor’s hydraulic functions.
>200
100÷200
50÷100
25÷50
10÷25
<10
29%
25%
14%
10%
48%
18%
>200
100÷200
50÷100
25÷50
10÷25
<10
14%
8%
10%
24%
Figure 2 – Clod incidence of the soil before and after the tiller has
passed (the legend shows the size classes of the clods in mm).
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Valentini - Maxi Squalo 4200
Tiller model
Working Operating
Average
Valentini series
width
capacity
Power at
"Maxi Squalo"
4700
5200
(m)
4.7
5.2
(ha/h)
1.76
1.96
PTO (kW)
156
173
Flanges Mass without
accessories
(n°)
18
20
(kg)
2190
2450
Table 3 – Assessment of the operating capacity and the power output required at the tractor
PTO of the other rotary tiller models in the "Maxi Squalo" series manufactured by Valentini.
The values are to be considered valid for working conditions identical to those seen during
the tests carried out on the "Maxi Squalo 4200".
REMARKS ON FUNCTIONALITY
The Valentini Maxi Squalo 4200 rotary
tiller has proved to perform an optimal
working of the soil in a single sweep
while working at the maximum working
depth, on very tough silt-clay soil with
high degree of surface clods. The implement show a high soil refinement
index and an excellent degree of soil
levelling. Therefore good results can be
obtained on difficult soil conditions.
Coupling to a 176 kW tractor appeared
to be correct for the difficult test conditions, considering the constant power
requirement at the tractor’s power take
off and the low power output necessary
for the traction of the implement, given
the pushing action of the rotor. Nonetheless a tractor with a lower power
output, as indicated by the manufacturer may be more suitable particularly
when the soil is lighter.
RECOMMENDATIONS
AND
INSTRUCTIONS
The rotary tiller is provided with a multilingual user and maintenance manual in
compliance with current regulations.
ROAD CIRCULATION
For the purposes of the Italian Highway
Code the machine is classed as a
mounted agricultural machine and is
therefore an integral part of the tractor
(art. 57, Law Decree n. 285 dated
30/04/1992), registration is not required
and it may circulate according to the
tractor’s mass and pivot ratios and the
necessary signs.
SAFETY CHECK
The machine is fitted with the CE mark,
an identification plate and safety pictograms as required by ISO standard
11684:1995 and is provided with an
user and maintenance manual and
declaration of conformity.
The manufacturer declares that the
machine conforms with the technical
standard: UNI EN 708:1998; EN
708/A1:1999; EN 1553:1999.
From the examinations effected and no
discrepancies were found with what the
manufacturer had declared.
The relevant documentation is deposited in the papers.
MODELS IN THE SAME SERIES
From tests carried out on the Valentini
“Maxi Squalo 4200” tiller and on the
basis of the results in table 2, it can be
assumed that under same test conditions and for a different number of
flanges, the values shown in table three
can be obtained. Table 4 shows the
other tiller models for which an extension to this test report has been issued.
.
Cert N°
Model
Serial N°
324
03-031b
MS 4700
325
03-031c
MS 5200
Table 4 – Other tiller models for which an
extension of this test report has been issued.
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THIS TEST REPORT IS VALID FOR FIVE YEARS FOR ALL MAXI SQUALO
4200 MODEL ROTARY TILLERS AND RELATIVE EXTENSIONS AND IS
OFFICIALLY RECOGNISED BY ALL THE MEMBERS OF ENAMA:
ASSOCAP (Associazione Nazionale dei Consorzi Agrari)
CIA (Confederazione Italiana Agricoltori)
COLDIRETTI (Confederazione Nazionale Coltivatori Diretti)
CONFAGRICOLTURA (Confederazione Generale Agricoltura)
UNACMA (Unione Nazionale Commercianti Macchine Agricole)
UNACOMA (Unione Nazionale Costruttori Macchine Agricole)
UNIMA (Unione Nazionale Imprese Meccanizzazione Agricola)
AS WELL AS BY BOARD OF GOVERNORS OF ENAMA IN WITCH ARE
REPRESENTED TOO:
MIPAF (Ministero per le Politiche Agricole e Forestali)
Regioni e Province Autonome
ISMA (Istituto Sperimentale per la Meccanizzazione Agricola)
THE TEST RESULTS ARE RECOGNIZED BY THE FOLLOWING TESTING
STATIONS BELONGING TO ENTAM, WITH THE FOLLOWING NUMBERS:
BLT - Bundesanstalt für Landtechnik
(Rottenhauserstraβe 1, A-3250 Wieselburg, AUSTRIA)
DLG - Deutsche Landwirtschafts-Gesellschaft e. V.
(Eschborner Landstraβe 122, D-60489 Frankfurt am
Main, GERMANY)
n° I - 050/00
n° I - 4904
is the European Network for Testing of Agricultural Machines and its purpose is to promote a cooperation among testing stations in order to optimize
activities and give a better service to farmers, dealers and manufacturers.
E
ENAMA - ENTE NAZIONALE PER LA MECCANIZZAZIONE
AGRICOLA
VIA LAZZARO SPALLANZANI, 22/A - 00161 ROMA
PH. 06/4403137-4403872 FAX 06/4403712
email: [email protected]
http://www.enama.it
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