Sola D-903 How to use

D-903
D-903 PLUS
MAQUINARIA AGRÍCOLA
STARTING MANUAL
MAINTENANCE
DOSAGE
SPARE PARTS
Please read and follow this operating manual before putting the machine into operation.

,62
%85($89(5,7$6
&HUWLILFDWLRQ
SOLÀ seed drills and fertilizer spreaders are manufactured in a highly specialized
environment and our factory has a vast network of satised customers.
SOLÀ machines use highly advanced technology and are guaranteed
to work without malfunctions in a large variety of conditions. They SOLÀ machines are provided
with easy-to-use and ecient devices and perform excellently with only minimum operator maintenance.
This manual will help you use your SOLÀ product with the maximum eciency.
Certied quality system
10th Edition - October 2014
Ref.: CN-811025/GB
Created by: INTEGRUM
It is forbidden to copy any part of this manual.
Specications are subject to change or modication without notice.
The pictures included do not necessary show the standard version.

3
TABLE OF CONTENTS
1. INTRODUCTION ....................................................................................................................................................................5
2. TECHNICAL CHARACTERISTICS............................................................................................................................................. 6
2.1 OVERVIEW.................................................................................................................................................................................... 6
2.2 STANDARD EQUIPMENT............................................................................................................................................................ 7
2.3 OPTIONAL EQUIPMENT............................................................................................................................................................. 7
3. SAFETY INSTRUCTIONS ........................................................................................................................................................7
3.1 SAFETY SYMBOLS ....................................................................................................................................................................... 7
3.2 USE ACCORDING TO DESIGN.................................................................................................................................................... 8
3.3 GENERAL SAFETY INSTRUCTIONS .......................................................................................................................................... 8
4. ESSENTIAL SPREADING CONCEPTS ...................................................................................................................................... 9
4.1 FACTORS TO BE TAKEN INTO ACCOUNT FOR A GOOD SPREADING.................................................................................. 9
4.2 FERTILISER SPREADING............................................................................................................................................................. 9
5. STARTING ............................................................................................................................................................................ 10
5.1 COUPLING TO THE TRACTOR.................................................................................................................................................. 10
5.2 PTO SHAFT................................................................................................................................................................................. 10
5.3 COUPLING THE TRAILED FERTILISER SPREADER TO THE TRACTOR ................................................................................11
5.4 H YDRAULIC CONNECTIONS OF THE BOUNDARY SPREADING LIMITER IN FERTILISER SPREADERS D-903 & D-903PLUS .....11
6. COMMON ADJUSTMENTS IN FERTILISER SPREADERS D-903 & D-903 PLUS...................................................................... 12
6.1 SUMMARISED METHOD FOR ADJUSTING............................................................................................................................ 12
6.2 KNOWLEDGE OF THE PHYSICAL CHARACTERISTICS OF THE FERTILISER .................................................................................12
6.3 FLOW ADJUSTMENT................................................................................................................................................................. 13
7. ADJUSTING THE WORKING WIDTH FOR FERTILISER SPREADER D-903 (UP TO 24 MM) ..................................................... 13
7.1 INTERPRETATION OF THE TABLES WHICH ADJUST THE WORKING WIDTH OF THE FERTILISER SPREADER D-903 .......... 14
8. INTERPRETATION OF THE TABLES WHICH ADJUST THE WORKING WIDTH OF THE FERTILISER SPREADER D-903 PLUS .. 14
9. CALIBRATION TEST ............................................................................................................................................................. 16
10. BOUNDARY AND SIDE SPREADING ................................................................................................................................... 17
10.1 BOUNDARY SPREADING BY REDUCING THE FERTILISER’S FLOW IN MODEL D-903.................................................. 17
10.2 HIDRAULIC CONNECTIONS OF THE BOUNDARY SPREADING LIMITER IN FERTILISER SPREADERS D-903 & D-903 PLUS ..................... 17
11. MANTENANCE.................................................................................................................................................................... 18
11.1 LUBRICATION........................................................................................................................................................................... 18
11.2 SCREWS .................................................................................................................................................................................... 18
12. DOSAGE TABLES................................................................................................................................................................ 18
12.1 SYMBOLS USED IN THE TABLES FOR D-903....................................................................................................................... 18
12.2 SYMBOLS USED IN THE TABLES FOR D-903 PLUS ............................................................................................................ 19
13. ASSEMBLING THE CONVERSION KIT FROM 24M TO 30-36 M IN MODEL D-903 ...............................................................22
14. ASSEMBLING THE CONVERSION KIT FROM 30-36 M TO 24 M IN MODEL D-903 PLUS......................................................23
15. SPARE PARTS.....................................................................................................................................................................24
15.1 CHASSIS D-903 : D-903 PLUS................................................................................................................................................ 24
15.2 FRONTAL FRAME D-903/3000 : D-903 PLUS/3000 ........................................................................................................... 26
15.3 FRONTAL FRAME COMPL. D-903/3000 : D-903 PLUS/3000............................................................................................ 28
15.4 FERTILIZER FENDERS D-903/3000....................................................................................................................................... 30
15.5 FERTILIZER HOPPER D-903 Y D-903 PLUS ......................................................................................................................... 32
15.6 REGULATION, DISTRIBUTION AND TRANSMITION D-903 PLUS.................................................................................... 34
15.7 REGULATION, DISTR. AND TRANS. D-903 Y D-903/3000................................................................................................ 36
15.8 CONVERSION KIT 36 TO 24 METERS ................................................................................................................................... 38
15.9 CONVERSION KIT 24 TO 36 METERS................................................................................................................................... 40
15.10 HYDRAULIC CONTROL FERTILIZER D-903 Y D-903 PLUS ............................................................................................. 42
15.11 SHORT LIMITER (MECH.L/HYDRAULIC) D-903 Y D-903 PLUS....................................................................................... 44
15.12 SHORT LIMITER D-903/3000; D-903 PLUS/3000 ............................................................................................................ 46
15.13 TRANSMITION ....................................................................................................................................................................... 47
15.14 FERTILIZER D-903/3000....................................................................................................................................................... 48
TABLE OF CONTENTS

4
TABLE OF CONTENTS

5
INTRODUCTION
1. INTRODUCTION
It is essential to read and follow the instructions and recommenda-
tions in this manual before operating the fertiliser spreader D-903
or D-903 PLUS. Careful reading enables maximum operator e-
ciency, prevents accidents and damage, and increases the fertiliser
spreader capacity and life expectancy.
Please ensure that this manual has been read by any person involved
in performing operational tasks, (including preparation, dealing
with mechanical problems and supervising the machine), mainte-
nance (inspection and technical assistance) and transport.
For your safety, please follow these technical safety instructions as
SOLÁ will not be responsible for damages caused by not observ-
ing the information provided.
In the rst chapters you will nd the Technical Characteristics and
Safety Instructions, as well as some essential sowing concepts.
Basic concepts that are required to operate the machine are ex-
plained in the Starting and Maintenance sections.
The last part of this manual consists of Dosage Tables, detailed by
seed type.
SOLÁ RETAINS THE RIGHT TO MODIFY ILLUSTRA
TIONS, TECHNICAL DATA AND WEIGHTS INDICATED
IN THIS OPERATING MANUAL, IF THESE CHANGES
HELP TO IMPROVE THE QUALITY OF THE FERTILISER
SPREADERS.
In this operating manual you will nd three dierent symbols relating to safety:
TO WORK MORE EASILY WITH THE FERTILISER SPREADERS.
TO PREVENT DAMAGE TO THE FERTILISER SPREADER AND OPTIONAL EQUIPMENT.
TO PREVENT PHYSICAL INJURY.

6
TECHNICAL CHARACTERISTICS
2. TECHNICAL CHARACTERISTICS
2.1 OVERVIEW
MODEL CAPACITY WIDTH LENGTH HEIGTH WEIGHT KG
D-903/1000 991 l 2.400 mm 1.342 mm 970 mm 302 Kg
D-903/1200 1.191 l 2.400 mm 1.342 mm 1.070 mm 316 Kg
D-903/1500 1.491 l 2.400 mm 1.342 mm 1.140 mm 334 Kg
D-903/2000 1.928 l 2.400 mm 1.342 mm 1.260 mm 347 Kg
D-903/3000 2.600 l 2.400 mm 3.100 mm 1.870 mm 760 Kg
PTO shaft turning speed 540 r/min
Discs turning speed 675 r/min
Spacing between the discs’s centers 1.140 mm
Working width D-903 15 a 24 m
Working width D-903 PLUS 30 y 36 m
Adjustment of the working width By means of spreading vanes and funnel
Spreading vanes per disc in D-903 3
Spreading vanes per disc in D-903 PLUS
Fig. 1

7
SAFETY INSTRUCTIONS
2.2 STANDARD EQUIPMENT
- Hopper’s bases, agitators, discs, funnels and spreading vanes,
all of them made of inox steel.
- Non-agressive slow-turning agitator.
- Ability to close the right outlet at the eld boundaries and
sides.
- Mechanically actuated boundary spreading limiter.
- Easy performance calibration test with both supplied calibra-
tion channel and calibration cup.
- Granulometer.
- Position lamps, indicators and brake lights.
- Protective tube at rear and at side to prevent contact with the
turning PTO shaft.
- PTO shaft with friction clutch and protection.
- Ability of spreading at medium height (only D-903).
- Three-point linkage of attachment category II.
2.3 OPTIONAL EQUIPMENT
- Hidraulically actuated boundary spreading limiter.
- Conversion kit 24-36 m for D-903.
- Conversion kit 36-24 m for D-903 PLUS.
- Mechanical remote for opening and closing the fertiliser outlets.
- Hopper cover.
3. SAFETY INSTRUCTIONS
3.1 SAFETY SYMBOLS
On the machine you will nd the following warning pictograms:
READ THE INSTRUCTIONS CAREFULLY AND OB
SERVE THE SAFETY ADVICE GIVEN IN THE OPERAT
ING MANUAL.
DURING THE COUPLING MANOEUVRE, STAY AWAY
FROM THE REAR PART OF THE TRACTOR.
RISK OF SERIOUS PHYSICAL INJURY.
DANGER OF INFECTION FROM ESCAPING HYDRAU
LIC FL UID AT HIGH PRESSURE! THIS CAN INFL ICT
SERIOUS INJURIES WITH POTENTIALLY FATAL CON
SEQUENCES IF IT PASSES THROUGH THE SKIN AND
INTO THE BODY.
KEEP THE HOSE LINES IN GOOD CONDITION.
RISK OF SERIOUS PHYSICAL INJURY.
RISK OF SERIOUS PHYSICAL INJURY.
WHILE MAINTAINING OR REPAIRING THE FERTIL
ISER SPREADER, STOP THE TRACTOR’S ENGINE
AND PREVENT IT FROM STARTING. THE IGNITION
KEY MUST BE REMOVED.
RISK OF BEING CRUSHED WHEN WORKING UNDER
THE MACHINE, PLEASE SECURE THE MACHINE TO
PREVENT THIS RISK.
RISK OF SERIOUS PHYSICAL INJURY.
THE DIRECTION AND SPEED THAT THE PTO SHAFT
TURNS ONLY IN MACHINES EQUIPPED WITH ME
CHANICAL FAN.
DO NOT EXCEED MAXIMUM LOAD.
COUPLING POINT FOR TRANSPORTATION BY CRANE.
540 rpm
1000 rpm
WARNING!
Max. weight: 1,490 kg

8
TECHNICAL CHARACTERISTICS
3.2 USE ACCORDING TO DESIGN
- Fertiliser spreaders D-903 & D-903 PLUS have been de-
signed for normal use in agricultural work, especially for
spreading with mineral products.
- If the machine is used in circumstances other than the above,
SOLÁ will not be held responsible for any damage caused.
- The user must observe all regulations concerning safety, traf-
c and hygiene.
- If the machine is modied by the user, the manufacturer’s
warranty is cancelled.
- SOLÁ will not be held responsible for any damage caused.
3.3 GENERAL SAFETY INSTRUCTIONS
BEFORE STARTING THE MACHINE, PLEASE CHECK
THE MACHINE IS IN GOOD CONDITION FOR WORK
AND IS SAFE FOR ROAD USE.
CHECK THAT VISIBILITY IS CLEAR AROUND THE MA
CHINE AND THERE IS NO PERSON IN THE WORKING
AREA.
IN THOROUGHFARE, PLEASE OBSERVE TRAFFIC
SIGNS AND REGULATIONS.
IT IS FORBIDDEN TO RIDE ON THE MACHINE OR
CLIMB INTO THE MACHINE WHEN IT IS RUNNING.
BEFORE USING THE MACHINE, THE USER MUST BE FA
MILIAR WITH ALL OPERATING ELEMENTS.
PLEASE BE EXTREMELY CAREFUL WHEN COUPLING
AND UNCOUPLING THE MACHINE TO THE TRACTOR.
PLEASE CHECK THAT THE PTO SHAFT IS IN GOOD
CONDITION AND WELL PROTECTED. PREVENT THE
PROTECTIVE TUBE FROM TURNING BY HOLDING
BOTH THE TUBE AND CHAIN PROVIDED FOR THIS
PURPOSE.
MOUNT THE PTO SHAFT’S TRANSMISSION ONLY
WHEN THE TRACTOR’S ENGINE IS OFF.
BEFORE CONNECTING THE PTO SHAFT, BE SURE THAT
THE DANGER ZONE SURROUNDING THE MACHINE IS
CLEAR.
NEVER LEAVE THE TRACTOR’S DRIVER’S SEAT WHILE
THE MACHINE IS IN OPERATION.
DO NOT DEPOSIT EXTERNAL ELEMENTS INSIDE THE
HOPPER.
WHEN MANTAINING THE HYDRAULIC SYSTEM OF
THE FERTILISER SPREADER, MAKE SURE THAT IT IS
DEPRESSURISED AND THE TRACTOR’S ENGINE IS OFF.
PLEASE REGULARLY CHECK THE CONDITION OF THE
TUBES AND HOSEPIPES IN THE HYDRAULIC SYS
TEM. THESE PARTS AGE NATURALLY AND THEIR LIFE
SHOULD NOT SURPASS 6 YEARS. PLEASE REPLACE
WHEN NECESSARY.
WHEN RAISING THE FERTILISER SPREADER, THE
FRONT AXLE IS UNLOADED. ENSURE THAT THE MA
CHINE HAS ENOUGH LOAD TO PREVENT IT OVER
TURNING. AT THIS TIME YOU MUST ENSURE THAT
THE CONDITION OF BOTH THE STEERING AND THE
BRAKES IS OPTIMAL.
DURING TRANSIT WITH THE RAISED FERTILISER
SPREADER, BLOCK THE LOWERING SWITCH. BEFORE
LEAVING THE TRACTOR, LOWER THE FERTILISER
SPREADER ONTO THE GROUND AND REMOVE THE
TRACTOR’S STARTING KEY.
ALWAYS USE ENOUGH SUPPORTING ELEMENTS
WHEN MAINTAINING THE MACHINE IN A RAISED PO
SITION TO PREVENT THE MACHINE FROM LOWERING
OR FALLING.
FILL THE FERTILISER SPREADER WHEN IT IS IN ON THE
GROUND, ENSURE THE TRACTOR ENGINE IS OFF AND
THE FERTILISER OUTLET OPENINGS ARE CLOSED.
ALWAYS CONNECT GENTLY THE PTO SHAFT’S CLUTCH
IN ORDER TO PROTECT THE FERTILISER SPREADER.
OTHERWISE THE MACHINE COULD BE SERIOUSLY
DAMAGED.
BE CAREFUL WHEN FILLING THE FERTILISER SPREAD
ER AND TAKING INTO A FIELD WHICH IS FAR AWAY. IT
IS POSSIBLE THAT THE FERTILISER COMPACTS AT THE
BOTTOM OF THE HOPPER AND THE OUTLET OPEN
INGS ARE OBSTRUCTED. IN THIS CASE IT WILL BE NEC
ESSARY TO COMPLETELY OPEN THE OUTLETS, LET THE
PTO SHAFT’S CLUTCH SLOWLY IN AND SPREAD SOME
FERTILISER. AFTER THIS OPERATION, PLACE THE AD
JUSTING LEVERS IN THE POSITION CORRESPONDING
TO THE CHOSEN FLOW AND SPREAD NORMALLY.
NEVER DELIBERATELY CAUSE THE EXIT OF THE FERTIL
ISER FROM THE UPPER PART OF THE HOPPER. THERE
IS A SERIOUS RISK OF OBSTRUCTING THE AGITATOR.
AFTER EACH WORKING DAY, THE SPREADING VANES
AND THEIR TIGHTING SCREWS SHOULD BE CHECKED.
THEY SHOULD BE REPLACED WHEN THEY ARE VISI
BLY WORN OUT, SINCE THE WEAR IS CAUSED BY THE
CONTACT WITH THE FERTILISER AND IT IS BECOMES
WORSE WHEN THE FERTILISER IS MORE ABRASIVE.
CONSEQUENCES OF WORN OUT SPREADING VANES
ARE A BAD IRREGULAR SPREADING AND, ESPECIALLY,
THE RISK CAUSED BY FRAGMENTS DETACHED FROM
THE SPREADING VANES.

9
ESSENTIAL SPREADING CONCEPTS
4. ESSENTIAL SPREADING CONCEPTS
4.1 FACTORS TO BE TAKEN INTO
ACCOUNT FOR A GOOD SPREADING
1- Fertiliser’s granulometry: Reject fertilisers with grains of ir-
regular size or with grains that break easily. This makes uniform
spreading di cult.
2- PTO shaft speed: PTO shaft’s speed determines the turning
speed of the spreading discs and, consequently, the working
width. Speed should be 540 rpm.
3- Forward speed: Variations in forward speed modify the
amount of fertiliser spread onto the ground.
4- Hopper’s position: The hopper should stay horizontal since
lateral or longitudinal lean modify the fertiliser’s distribution
onto the ground.
5- Working height: The working height should stay constant at
75 cm mesured from the disc to the ground. This height should
be checked at the  eld. It should not be checked when coupling
the machine in the warehouse.
6- Do not fertilise if the weather is windy: Wind modi es the
spreading direction of the fertiliser grains as well as distribution.
The wider the working width, the lower the dose and the more
irregular the grain size, result in highly uneven spreading in
windy conditions.
7- Wear and tear of the spreading discs and spreading vanes:
Spreading discs and spreading vanes are essential in the spread-
ing of the fertiliser, and their wear can have great in uence
when spreading the fertiliser onto the ground. Keep them in
optimal condition.
8- Check fertiliser’s ow: Perform a previous calibration test in
the warehouse in order to know exactly the amount of fertiliser
going to be spread. Dosage is going to be very dierent when
using di erent kinds of fertiliser, as it depends on factors such
as density, moisture content, etc...
9- Distance between tramlines: Keeping the distance between
tramlines is essential to get optimal spreading. To know this
distance, follow the adjusting instructions. To increase the pre-
cision, a test at the  eld could be performed by checking the
amount of spread fertiliser using boxes placed on the ground.
4.2 FERTILISER SPREADING
It is well known that the amount of fertiliser spread onto the eld
directly aects in the output of the harvest.
Nevertheless, what is even more important than the amount of fer-
tiliser is the uniformity in which it is distributed along the terrain.
Fertiliser spreaders D-903 and D-903 PLUS distribute the fertil-
iser as shown in the followingdiagram:
To get a uniform distribution, the fertiliser should be spread over-
lapping the tramlines so the  nal result is a  at diagram like the
one below:
Uniformity in fertiliser distribution is measured by means of the co-
eciency of variation (CV). The CV is calculated using a statistical for-
mula based on the data obtained from the overlapping technique.
Fertiliser’s manufacturers agree on the fact that CV is very good if it
stays below 10%, it is medium if it stays between 10% and 15%, and it
is bad if it exceeds 15%. The last case should be avoided.

10
STARTING
5. STARTING
5.1 COUPLING TO THE TRACTOR
The fertiliser spreaders D-903 and D-903 PLUS are provided with
bolts of category II for their coupling to the tractor’s three-point link-
age.
To the make the coupling easier, the fertiliser spreader is equipped
with two supports which, when lowered to a vertical position (Fig. 2),
increase the height of the coupling point.
Fig. 2
In working position, the fertiliser spreader should stay horizontally
and its disc shoud be at 75 cm from the ground (Fig. 3).
Fig. 3
5.2 PTO SHAFT
PTO shaft’s turning speed should be 540 rpm and it is important to
keep this constant while working.
Fig. 4
Once the fertiliser spreader is coupled with the tractor, THE PTO
SHAFT SHOULD BE ADAPTED:
1- Dismount and insert one end into the tractor’s universal joint
shaft and the other end into the fertiliser spreader. Look for the
minimal movement length “L” (Fig. 5) by raising and lowering the
hydraulic lift.
2- Cut the spare plastic and metal into parts of the same length and
remount the PTO shaft.
3- Operate the hydraulic lift and check that the PTO shaft’s move-
ment is correct.
4- Secure the PTO shaft using the chain.
Fig. 5
Fig. 6
Fig. 7

11
STARTING
WHEN OPERATING THE PTO SHAFT CHECK THAT
THE ENGINE IS OFF. ALWAYS WORK WITH THE
PTO SHAFT PROTECTED AND IN GOOD CONDI
TION. PREVENT THE PTO SHAFT’S TUBE FROM
TURNING BY SECURING IT WITH THE CHAIN PRO
VIDED.
WHEN LOWERING THE FERTILISER SPREADER TO
THE GROUND, UNPLUG THE TRACTOR’S UNIVER
SAL JOINT SHAFT SO THAT THE PTO SHAFT DOES
NOT HAVE AN EXCESSIVE INCLINATION MAX. 35º.
WHEN HOLDING THE TRACTOR UNIVERSAL JOINT
SHAFT’S CLUTCH IN, PERFORM IT GENTLY. START
ING SUDDENLY COULD SERIOUSLY DAMAGE THE
FERTILISER SPREADERS.
5.3 COUPLING THE TRAILED FERTILISER
SPREADER TO THE TRACTOR
Fertiliser spreaders D-903 and D-903 PLUS Trailed are equipped
with a type of coupling (axle-swivelling ring) which can be easily
adjusted to dierent heights.
Fig. 8
Once coupled to the tractor, the fertiliser spreader should stay
horizontal. To make it easier, the height of the coupling ring can be
adjusted in two dierent positions.
To switch between heights, simply invert the ring’s position. In
some cases it is possible that none of the two positions is the cor-
rect one to level the fertiliser spreader horizontally. If this is the
case, the platina which holds the ring in the right position should
be soldered and correctly secured.
Check that the ends of the PTO shaft’s telescopic axle (Fig. 9) do not
touch when the fertiliser spreader is raised to its working position.
Cut these ends, if necessary, leaving a section long enough to en-
sure a connection of at least 15 cm with the shaft fully extended.
BEFORE CONNECT THE PTO SHAFT CHECK THE
MINIMUM MEASURE
Fig. 9
Mount the PTO shaft with the clutch on the fertiliser spreader side.
Mounting on the trailed fertiliser spreader.
5.4 HYDRAULIC CONNECTIONS OF THE
BOUNDARY SPREADING LIMITER
IN FERTILISER SPREADERS D903 &
D903PLUS
STARTING:
The plugs in the pilot-operated non-return valve should be con-
nected to the same double-acting connection. From now on, we
will name it Connection No. 1. The third plug should be connected
to a dierent connection which will be named Connection No. 2
from now on.
Connection No. 1 determines the working mode, unfolding or fold-
ing the boundary spreading limiter.
Connection No. 2 is in charge of opening the fertiliser outlets.
When the limiter is unfolded, only the left outlet (in the driving di-
rection) can be opened or closed. On the other hand, when the
limiter is folded, both outlets can be opened or closed.
Fig. 10
THEREFORE:
For normal spreading at the center of the  eld, we should work
only with Connection No. 2, making previously sure that the limiter
is folded.
For boundary spreading at  eld edges,  rst of all the limiter should
be unfolded using Connection No. 1 and next, keeping always the
 eld edge at the right side at about 3 metres from fertiliser spread-
er’s centre, the left outlet in the drive direction can be opened and
closed using Connection No. 2.
THESE TWO PLUGS ARE USED TO ADJUST THE OPENING AND CLOSING OF
THE BOUNDARY SPREADING LIMITER
PILOTOPERATED
NONRETURN VALVE
PLUGS CONNECTED TO
THE SAME DOUBLEACTING
CONNECTION.

12
COMMON ADJUSTMENTS IN FERTILISER SPREADERS D-903 & D-903 PLUS
Fig. 11
CONNECTIONS IN TRACTORS SHOW OFTEN LEAKS
DUE TO INTERNAL WEAR. FOR THIS REASON, DUR
ING TRANSIT OR IN WORK BREAKS IT IS BETTER
KEEPING THE LIMITER FOLDED AND THE THIRD
PLUG’S TAP CLOSED TO PREVENT THE FERTILISER
OUTLETS FROM OPENING.
BE SURE THERE IS NOBODY CLOSE TO THE MA
CHINE WHEN OPERATING THE HYDRAULIC CON
TROLS OR WHEN THE MACHINE IS WORKING.
6. COMMON ADJUSTMENTS IN FERTILISER SPREADERS D-903
& D-903 PLUS
6.1 SUMMARISED METHOD FOR AD
JUSTING
The essential workow steps to adjust the fertiliser spreader are as
follows:
1. Knowing the kind of fertiliser, its granulometry, its density, its
state (fragments or whole), etc..., to be able to compare it to a
similar one found in the tables of chapter 12 of this manual.
2. Knowing the spreading dose in Kg/Ha to be spread, established
depending on the kind of both crop, earth and fertiliser.
3. Choosing a working width.
4. Checking the corresponding dosage table and search the de-
sired ow in the squares of Kg/Ha column which depend on the
forward speed. Adjust the spreading vanes and the dosing slider
as indicated in the table.
Fig. 12 Fig. 13
5. Perform a calibration test to check that the dosage is correct.
Fig. 14
6. Spread a well kwown and small eld to be able to check the in-
structions explained in the previous points.
6.2 KNOWLEDGE OF THE PHYSICAL CHAR
ACTERISTICS OF THE FERTILISER
Using the same fertiliser spreader adjustments for dierent fertilisers
is not a good way of working, since the spreading of the fertiliser will
dier greatly if the fertiliser’s physical characteristics are dierent.
Therefore, for each type of fertiliser, a dierent adjustment needs to
be set in the machine.
Physical characteristics which dene a particular type of fertiliser are,
basically, density and granulometry.
DENSITY:
It is the weight per unit volume. It is measured in Kg/dm3. It can dier
depending on the moisture content of the fertiliser.
Density of the fertiliser to be used should be compared to the densi-
ties found in the dosage tables in chapter 12 of this manual.
GRANULOMETRY:
It shows the ratio between the dierent grain sizes found in the fer-
tiliser. The granulometry of each fertiliser can be found in the dosage
tables. In them, the grain diameter is presented in four groups:
Ø 4,75 % of grains which diameter exceed 4,75 mm
Ø 3,3 % of grains with diameters from 3,3 mm up to 4,75 mm
Ø 2 % of grains with diameters from 2 mm up to 3 mm
Ø <2 % of grains which diameter is smaller than 2 mm
By convention, the group to which more than 50% of the fertiliser
grains belong, determines the type of fertiliser.
A fertiliser is considered accepable when 90% of its granulometric
sizes can be found in a maximum of three contiguous groups.
To check the fertiliser granulometry, there is a special box with sieves.
Thus the fertiliser to be spread can be compared to the ones in the
dosage tables in a very easy way.
KNOWLEDGE OF THE PHYSICAL CHARACTERISTICS OF THE
FERTILISER:
Fertiliser showing excessive moisture content and dust do not ow
correctly and they form vertical walls inside the hopper instead of
sliding. Additionally, grains with high moisture content are fragile,

13
COMMON ADJUSTMENTS IN FERTILISER SPREADERS D-903 & D-903 PLUS
7. ADJUSTING THE WORKING WIDTH FOR FERTILISER
SPREADER D-903 (UP TO 24 M)
The working width in the fertiliser spreader D-903 can be adjusted by
means of the position of the spreading vanes. The optimal working
width depends on the kind of fertiliser to be used as well as the dose
to be spread.
The next table shows the approximate values for the working widths
that provide a coecient of variation (CV) lower than 10 – good –
or 15 – mediumfor three kinds of fertiliser and dierent doses to be
spread. It is recommended to spread at the working widths of the
column whose CV is lower (than 10% in order to get optimal results).
FER
TIL
ISER
FLOW
KG/MIN
DOSE TO BE
SPREAD
A 8 KG/HA
KG/HA
WORKING
WIDTHS
C.V. LOWER
THAN 10% MTS
WORKING
WIDTHS C.V.
LOWER THAN
15%MTS
NAC
50
100
265
from 150 to 300
from 300 to 600
from 800 to 1.600
24-21-18-15
24-21-18-15
24-21-18-15
NPK
50
100
265
from 150 to 300
from 300 to 600
from 800 to 1.600
24-21-18-15
24-21-18-15
18-15
24-21
UREA
37
75
199
from 150 to 300
from 300 to 600
from 800 to 1.600
18-9-15
18-12-9
18-12-9
12
15
15
Once the optimal working width is determined, the spreading
vanes need to be placed at the position indicated in the dosage
tables. Note that, for the same working width but using dierent
doses, the spreading vanes are in dierent positions.
Position of each spreading vane is indicated by means of a letter
(A-B-C) and a number (1-2-3).
Letters A, B and C indicate the position of the xing screw in the
hole of each spreading vane’s.
Fig. 16 Left spreading vane view (it should be assembled in the
left side disc in the drive direction).
Numbers 1,2 and 3 indicate the position of the spreading vane on
the discs’s holes.
Fig. 17
break more easily and their fragments will not reach the same dis-
tance than dry and whole grains and therefore the distribution will
be worse. For this reason, using this kind oertiliser needs to be
avoided.
6.3 FLOW ADJUSTMENT
In order to adjust the ow, the fertiliser characteristics needs to be
determined as indicated in point 6.2 of this manual. Once this is
done, the dosage tables need to be consulted to nd the most sim-
ilar fertiliser to the one which is going to be used.
For a chosen dose and working width, search in the tables the
square corresponding to this dose (Kg/Ha) in the column that
matches the right working width and forward speed.
Once the square corresponding to the chosen dose is located, fol-
low the same row towards the left until the end of the table, where
the position of the adjusting lever is indicated. The stop for the
lever needs to be placed in that number in the graduated sector.
Fig. 15
DRIVE DIRECTION
LEFT
SPREADING
DISC
RIGHT
SPREADING
DISC

14
INTERPRETATION OF THE TABLES WHICH ADJUST THE WORKING WIDTH OF THE FERTILISER SPREADER D-903 PLUS
7.1 INTERPRETATION OF THE TABLES
WHICH ADJUST THE WORKING
WIDTH OF THE FERTILISER
SPREADER D903
In order to explain how to use the tables which adjust the dosage
and the working width, an example is going to be shown.
Let’s suppose that we want to spread about 330 Kg/Ha of NAC 27%
working at 8 Km/h of forward speed and working at 15 metres be-
tween tramlines.
First of all, we need to consult the table corresponding to NAC 27%
or, if we are using a dierent fertiliser with no specic table, we need
to chose the table of the fertiliser most similar in granulometry and
density.
Once the correct table has been determined, we need to consult the
column corresponding to 15 metres and, inside this one, we need to
nd the 8 km/h column. We will follow the column downwards until
we nd the closest value to 330 Hg/Ha. In this case it turns out to be
334 Kg/Ha.
At the left of this dosing value, in the column corresponding to the
graduated sector’s lever position, we are going to nd the position
for the lever.
At the right of the dosing value we will nd the position for the fun-
nels and the position of the spreading vanes on the discs.
The doses that can be found in the tables are approximative, they
can dier in fertilisers of the same type due to moisture, granulom-
etry, density, etc.
To know exactly the needed dose (in Kg/Ha) of the fertiliser we are
going to use, for a determined position of the lever in the graduat-
ed sector, it is recommended to perform calibration tests with the
calibration channel which is supplied with the machine, following
the instructions detailed in this manual.
Fig. 18
8. INTERPRETATION OF THE TABLES WHICH ADJUST THE WORK-
ING WIDTH OF THE FERTILISER SPREADER D-903 PLUS
The fertiliser spreader D-903 PLUS allows working widths of 30 and
36 metres with fertilisers of the right physical characteristics.
For a chosen fertiliser dose (Kg/Ha), the machine can be adjusted in
any of the two working widths by means of the dosage tables. They
show the positions for the spreading vanes and their extensions, the
funnels and the ow regulator.
Fig. 19
Due to the trapezoidal shape of the spread, it is very important to
keep the distance between tramlines to correctly spread the fertiliser
along the eld.
We are going to use an example in order to explain how to use the
tables to adjust the dose and the machine’s working width.
Let’s supose we want to spread about 170 Kg/Ha of NPK 10-10-15,
working at 8 Km/h and 30 metres between tramlines.
First of all, we need to consult the table corresponding to NKP 10-10-
15 or, if we are using a dierent fertiliser with no specic table, we
need to chose the table of the fertiliser most similar in granulometry
and density.
Once the correct table has been determined, we need to consult the
column corresponding to 30 metres and, inside this one, we need to
nd the 8 km/h column. We will follow the column downwards until
we nd the closest value to 170 Hg/Ha. In this case it turns out to be
171 Kg/Ha.
On the left hand side of this dosing value, in the column correspond-
ing to the graduated sector’s lever position, we are going to nd the
position for the lever.
On the right of the dosing value we will nd the position for the fun-
nels as well as the position and extensions of the short spreading
vane and the long spreading vane (in this order). This positions are
the same for both discs.
INPUT
GRADUATED SECTOR.
We will place the stop
for the lever at No. 8
FUNNELS We will place
the funnels in the
position No. 1
POSITION OF THE
SPREADING VANES
We will place the hole
C of only two of the
spreading vanes in the
hole No. 2 of the disc,
and the hole B of the
third spreading vane
in the hole No. 2 of the
disc.
Fertiliser spreader’s parts involved in adjusting the working width
EXTENSION OF
THE RIGHT SHORT
SPREADING VANE
RIGHT SHORT
SPREADING VANE
RIGHT LONG
SPREADING VANE
EXTENSION OF THE
RIGHT LONG
SPREADING VANE
GRADUATED
SECTOR’S LEVEL
GRADUATED
SECTOR’S STOP
FUNNEL

15
INTERPRETATION OF THE TABLES WHICH ADJUST THE WORKING WIDTH OF THE FERTILISER SPREADER D-903 PLUS
The doses that can be found in the tables are approximative, they can
dier in fertilisers of the same type due to moisture, granulometry,
density, etc.
To know exactly the dose needed (in Kg/Ha) of the fertiliser we are
going to use, for a determined position of the lever in the graduat-
ed sector, it is recommended to perform calibration tests with the
calibration channel which is supplied with the machine, following
the instructions detailed in this manual.
Fig. 20
NAMES OF THE DIFFERENT HOLES IN SPREADING DISCS AND
SPREADING VANES IN THE FERTILISER SPREADER D-903 PLUS
HOLES IN THE LEFT SHORT SPREADING VANE
(THE RIGHT ONE HAS THE SAME NAMES)
HOLES IN THE LEFT LONG SPREADING VANE
(THE RIGHT ONE HAS THE SAME NAMES)
Fig. 23
Fig. 24
INPUT
GRADUATED SECTOR
We will place the stop
for the graduated
sector’s lever at position
No. 8
EXTENSION OF THE SHORT
SPREADING VANE
We will place the hole E of
the short spreading vane
in the hole No. 4 of the
extension.
EXTENSION OF THE LONG
SPREADING VANE We will
place the hole E of the long
spreading vane in the hole-
No. 3 of the extension.
POSITION OF THE LONG
SPREADING VANE
We will place the hole B of
the long spreading vane in
the hole No. 3 of the disc.
POSITION OF THE SHORT
SPREADING VANE We will
place the hole B of the short
spreading vane in the hole
No. 1 of the disc.
EXTENSION OF THE LEFT SHORT
SPREADING VANE
EXTENSION OF THE LEFT LONG
SPREADING VANE
LEFT SHORT SPREADING VANE
LEFT LONG SPREADING VANE
FUNNELS
We will place the funnels
at position No. 4
DRIVE DIRECTION
HOLES IN THE LEFT
SPREADING DISC
HOLES IN THE RIGHT
SPREADING DISC

16
CALIBRATION TEST
9. CALIBRATION TEST
In order to know the fertiliser ow to be spread by the fertiliser
spreader, the amount of fertiliser that comes out from one of the out-
let opening in one minute needs to be measured. Using the result of
this measurement, the amount in Kg/Ha to be spread will depend
only on the forward speed and the space between tramlines.
Fertiliser spreaders D-903 and D-903 PLUS allow calibration tests
to be performed in the following way:
Fig. 25
1. Remove the left spreading disc (in the drive direction) by freeing
the ring pin (1, Fig. 26) which is at the lower part. Remove the left
spreading disc (in the drive direction) by freeing the ring pin (1,
Fig. 25) which is at the lower part.
2. Place the funnel’s position indicator (2, Fig. 27) in No. 7 and place
the calibration channel as indicated in the upper gure.
3. Fill the left side of the hopper with fertiliser.
Fig. 26
Fig. 28
Fig. 27
4. Place the calibration cup under the calibration channel.
5. Place the stop of graduated sector’s lever at the desired position.
6. Start the machine at 540 rpm and open the outlet for a minute
(take as a guidance the doses shown in the tables, because one
minute in position No. 12 will allow about 50 Kg of a fertiliser to
come out, with an specic weight around 1 Kg/L).
Fig. 29
Fig. 31
Fig. 30
7. WeighT the fertiliser that is in the calibration cup (so to directly
obtain the value of the ow in Kg/min). To know the dose in Kg/
Ha, apply the following formula:
1200 x FLOW (kg/min)
DOSE (kg/ha)=
SPEED (km/h) x
WORKING WIDTH (m)
If the ow rate is very high, reduce the time during which the outlet
is opened to ½ min or to ¼ min, taking then into account that the
dose will need to be multiplied by 2 or 4 respectively.
SECURING SCREW FUNNEL LEVER
SET AT POSITION
NO. 7
LEFT SPREADING
DISC’S LOCKING
PIN
CALIBRATION CUP FOR
CALIBRATION TESTS
CALIBRATION CHANNEL FOR
CALIBRATION TESTS

17
BOUNDARY AND SIDE SPREADING
10. BOUNDARY AND SIDE SPREADING
10.1 BOUNDARY SPREADING BY RE
DUCING THE FERTILISER’S FLOW IN
MODEL D903
TO PREVENT ACCIDENTS, WHEN OPERATING THE
FUNNEL IN THE TURNING DISCS ZONE, IT IS ESSEN
TIAL THAT THE ENGINE IN THE TRACTOR IS OFF.
When starting to work at half of the working width, it is necessary
to work with both spreading discs together but the funnel’s lever
(P) needs to be in position 7. Thus, the side in which the funnel’s po-
sition has been changed, will have its fertilizer’s spreading reduced
to half the working width.
Fig. 32
10.2 HIDRAULIC CONNECTIONS OF THE
BOUNDARY SPREADING LIMITER IN FER
TILISER SPREADERS D903 & D903 PLUS
Fig. 33
STARTING:
The plugs in the pilot-operated non-return valve should be con-
nected to the same double-acting connection. From now on, we
will name it Connection No. 1. The third plug should be connected
to a dierent connection, let’s name it Connection No. 2.
Connection No. 1 determines the working mode, unfolding or fold-
ing the boundary spreading limiter.
Connection No. 2 is in charge of opening the fertiliser outlets.
When the limiter is unfolded, only the left outlet (in the driving di-
rection) can be opened or closed. On the other hand, when the
limiter is folded, both outlets can be opened or closed.
THEREFORE:
For a normal spreading at the center of the eld, we should work
only with Connection No. 2, making previously sure that the limiter
is folded.
For spreading at eld edges, rst of all the limiter should be unfold-
ed using Connection No. 1 and next, keeping always the eld edge
at the right side at about 3 metres from the fertiliser spreader’s cen-
tre, the left outlet in the drive direction can be opened and closed
using Connection No. 2.
Fig. 34
SPREADING OF THE FERTILIZER AT HALF THE WORKING WIDTH
THESE TWO PLUGS ARE USED TO ADJUST THE OPENING AND CLOSING OF THE LIMITER
PILOTOPERATED
NONRETURN VALVE
PLUGS CONNECTED TO THE
AME DOUBLEACTING
CONNECTION

18
CALIBRATION TEST
11. MANTENANCE
11.1 LUBRICATION
PTO’s shaft and the boundary spreading limiter need to be greased
daily.
After using the fertiliser spreader, it is recommended to wash it using
hosepipes.
In order to make the washing easier, raise the hopper unlocking the
locking hooks which x it on each side of the chassis.
The gear box uses grease type NLGI 00. Periodically check the grease
level by removing the lling cap and rell if necessary.
Do not fold down the hopper with the 1000 L hopper extension be-
ing assembled, since the fertiliser spreader would overturn.
Fig. 35
The trailers for fertiliser spreaders D-903 and D-903 PLUS are
equipped with two balloon wheels type 12,5/80-15/3, providing
good suspension and stabilization.
Recommended tyre pressure is 7 Kg/ cm2.
11.2 SCREWS
All the screws used in the fertiliser spreader are size 8.8.
AFTER WORKING FOR SOME HOURS, ALL SCREWS
SHOULD BE CHECKED AND TIGHTENED.
12. DOSAGE TABLES
THE DOSAGE TABLES INDICATE THE SPREAD DOS
ES IN KG/HA FOR EACH KIND OF FERTILISER, DE
PENDING ON THE WORKING WIDTH AND THE FOR
WARD SPEED.
THE INDICATED QUANTITIES ARE APPROXIMATIVE,
SINCE THE PREDICTED FLOW CAN DIFFER DUE TO
THE VARIETY OF GRANULOMETRY, DENSITY, MOIS
TURE, ETC.
FOR FERTILISERS NON SPECIFIED IN THE TABLES,
USE THE ONE WHICH IS MOST SIMILAR IN GRANU
LOMETRY AND DENSITY.
12.1 SYMBOLS USED IN THE TABLES FOR
D903
WORKING WIDTH OR SPACING BETWEEN
TRAMLINES.
POSITION OF THE ADJUSTING LEVER.
FLOW OF ONE OUTLET, IN KG/MIN.
FORWARD SPEED IN KM/H.
POSITION OF THE SPREADING VANES ON
THE DISC.
POSITION OF THE FUNNEL.

19
CALIBRATION TEST
12.2 SYMBOLS USED IN THE TABLES FOR D903 PLUS
WORKING WIDTH OR SPACING BETWEEN
TRAMLINES.
POSITION OF THE ADJUSTING LEVER.
FLOW OF ONE OUTLET, IN KG/MIN.
FORWARD SPEED IN KM/H.
POSITION OF THE FUNNEL.
SHORT SPREADING VANE’S HOLE ON DISC’S
HOLE.
EXTENSION OF THE SHORT SPREADING
VANE.
LONG SPREADING VANE’S HOLE ON DISC’S
HOLE.
EXTENSION OF THE SPREADING VANE.
FERTILISER
DENSITY
GRANULOMETRY
FERTILISER
DENSITY
GRANULOMETRY
TABLE 1
TABLE 1

20
CALIBRATION TEST
FERTILISER
DENSITY
GRANULOMETRY
TABLE 2
FERTILISER
DENSITY
GRANULOMETRY
TABLE 2
FERTILISER
DENSITY
GRANULOMETRY
TABLE 3