Multiva Optima T500 Optima T600, Optima T800, Optima T900, Optima T700, Optima T Maintance Manual

Optima

Starting from serial nr 05240016

01 / 2016

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S-TINE HARROWS

Contents

1. FOREWORD ............................................................................................................................................................................ 1

1.1. Intended use of the machine ...................................................................................................................................... 1

1.2. Technical specifications ................................................................................................................................................. 2

1.3. Type plate ........................................................................................................................................................................... 2

2. SAFETY INSTRUCTIONS ...................................................................................................................................................... 3

2.1. Warning symbols ............................................................................................................................................................. 3

2.2. Hitching and unhitching ............................................................................................................................................... 4

2.3. Transport on public roads ............................................................................................................................................ 4

2.4. Using the harrow ............................................................................................................................................................. 5

2.5. Maintenance ...................................................................................................................................................................... 6

3. COMMISSIONING AND BASIC ADJUSTMENTS ........................................................................................................... 7

3.1. Measures before commissioning ............................................................................................................................... 7

3.2. Hitching to tractor ........................................................................................................................................................... 7

3.3. Adjusting hydraulic hoses ............................................................................................................................................ 8

3.4. Side section and front levelling board hydraulics selector valve, Optima T500 - T700 .......................... 8

3.5. Operating principle of the front levelling board and depth adjustment hydraulics .............................. 9

3.6. Synchronizing the cylinders......................................................................................................................................... 9

3.7. Harrow position adjustment..................................................................................................................................... 10

3.8. Basic adjustment of the side sections ................................................................................................................... 10

4. USE AND ADJUSTMENT OF THE HARROW............................................................................................................... 12

4.1. Seedbed preparation .................................................................................................................................................. 12

4.2. Tillage technique .......................................................................................................................................................... 12

4.3. Starting and setting into work position ................................................................................................................ 13

4.4. Transport position ........................................................................................................................................................ 13

4.5. Adjusting working depth ........................................................................................................................................... 14

4.6. Adjusting the depth scale .......................................................................................................................................... 14

4.7. Using the levelling boards ......................................................................................................................................... 15

4.8. Using the rear harrow ................................................................................................................................................. 16

4.9. Using the cage roller .................................................................................................................................................... 17

4.10. Front support wheel ( T1000 – T1500 only) ..................................................................................................... 17

5. MAINTENANCE .................................................................................................................................................................. 18

5.1. Wear parts ....................................................................................................................................................................... 18

5.2. Changing a wheel ......................................................................................................................................................... 18

6. MAINTENANCE PROGRAMME, INSPECTIONS ......................................................................................................... 19

6.1. Bolt tightening torques .............................................................................................................................................. 19

6.2. Tyre pressure .................................................................................................................................................................. 19

6.3. Wheel hub bearing clearance .................................................................................................................................. 20

6.4. Bogie bearing clearance ............................................................................................................................................. 20

6.5. Hydraulics ........................................................................................................................................................................ 20

6.6. Side section locking ..................................................................................................................................................... 21

6.7. Front support wheel bearing clearance ............................................................................................................... 21

6.8. Selector valve operation ............................................................................................................................................ 22

7. MAINTENANCE PROGRAMME, LUBRICATION......................................................................................................... 23

8. STORAGE .............................................................................................................................................................................. 27

9. WARRANTY.......................................................................................................................................................................... 28

Appendix 1. EC DECLARATION OF CONFORMITY ........................................................................................................ 29

Appendix 2. Hydraulic schematic Optima T500............................................................................................................. 30

Appendix 3. Hydraulic schematic Optima T600-700 .................................................................................................... 31

Appendix 4. Hydraulic schematic Optima T800-900 .................................................................................................... 32

Appendix 5. Hydraulic schematic Optima T1000 .......................................................................................................... 33

Appendix 6. Hydraulic schematic Optima T1250 .......................................................................................................... 34

Appendix 7. Hydraulic schematic Optima T1500 .......................................................................................................... 35

Appendix 8. Connection socket according to SFS 2473 .............................................................................................. 37

1

1. FOREWORD

Multiva agricultural machines are manufactured in Finland. The modern production technology,
excellent raw materials and careful manufacturing and finishing utilised in the production of the
machines guarantees a high quality product. Multiva product range includes the following agricultural
machines:

• Trailers

• S-Tine Harrows

• Disc Harrows

• Cultivators

We thank you for choosing and putting your trust on the Multiva S-Tine Harrow. We hope that the
product fulfils you requirements and serves you for a long time. We advise you to carefully go
through these instructions before commissioning the machine. The inspection and maintenance
activities described in these instructions are vitally important for the proper functioning of the machine
and the validity of the warranty.

All instructions, warnings and cautions must be followed without exception. They are given to ensure
the safety of the user and the durability of the machine.

These operation and maintenance instructions apply to Optima range harrows starting from serial
number 05240016.

1.1. Intended use of the machine

Multiva s-tine harrow is designed to perform seedbed preparation of soil, to which primary tillage has
already been carried out, to prepare the soil for seeding. Multiva s-tine harrow produces a smooth
seedbed and a sufficiently fine crumb structure, which are the requirements for even and optimal
growth, economically with a minimum amount of harrowing. The s-tine harrow, with two or three
levelling boards and narrower tine spacing, can also be used for levelling. Never use the s-tine harrow

to perform primary tillage to unprepared soil!

Multiva Optima T is an efficient harrow for various soil types. The spacious frame structure prevents even
extensive amounts of plant residue from causing harrow clogging. The supporting wheels ensure
uniform tillage depth even on soft soil types. Due to the great weight and robustness of the tines of the
harrow, it is also suitable for tilling heavy soil. The tilling power of Optima T models can be increased by
utilising a rear levelling board which is available as an option. The working width can be changed by
using extension parts in models T600 and T800. Extension parts are bolted to the base frame of the s­tine harrow.

2

1.2. Technical specifications

With standard equipment

Optima T

T500 T600 T700 T800 T900 T1000

T1250

T1500

Nr of s

-

tines

67 79 91 105 117 129

163 183

Tine spacing mm

75 75 75 75 75 75

75 75

Nr of tine axles

7 7 7 7 7 9 9 9

Working width cm

500 600 700 800 900 1000

1300

1450

Length of the frame

300 300 300 300 300 410

410 410

Transport width cm

300 340 340 340 340 420 420 420

Extension parts

- - 2x0,5m

- 2x0,5m

- - -

Power require

ment hp

80 100 120 140 160 200

260 300

Weight kg

2220

2700

3120

3540

3970

6530

7865

9820

Technical specifications can be found also on the manufacturer's website. Please contact the
manufacturer to acquire information about new products.
Due to ongoing product development, products and specifications discussed herein are subject
to change.

1.3. Type plate

A type plate similar to the one below is attached to the harrow. Please write all the information from the
type plate in this manual. When you are dealing with the supplier of the Multiva machine or a factory
representative, please mention the model and serial number of the machine. This is recommended to
avoid delays and unnecessary misunderstandings.

Fields in the type plate:
Serial = Serial number of the machine
Model = Model of the machine
Weight = Weight of the machine with standard

3

2. SAFETY INSTRUCTIONS

These safety instructions and safety distances must without exception be followed when using the
machine. The machine must be configured according to this manual and this manual must be utilised in
the operation and maintenance of the machine.

Never allow any person to ride the harrow during work or transport!

2.1. Warning symbols

Follow the warning labels attached to the harrow pictured below. Do not remove the warning labels on
the machine.

Warning label

Explanation

CAREFULLY READ THE OPERATION

MANUAL AND THE SAFETY INSTRUCTIONS

BEFORE CONNECTING THE MACHINE TO A

TRACTOR!

CRUSHING HAZARD!

IMPACT HAZARD!

Maintain a 10-metre safety distance from the

machine when the side wings are up and

when the machine is in operation.

Do not go under the machine unless it is

mechanically supported.

CRUSHING HAZARD!

There is a danger of crushing in hitching and

unhitching activities. Beware the bruising of

feet, fingers and arms

RISK OF FALLING!

Standing on the machine is not allowed in any

situation.

SHARP EDGES!

There is a risk of injury when using the

machine functions. Maintain a 10 m safety

distance when connecting the machine to the

tractor.

4

HIGH PRESSURE

HYDRAULIC OIL

!

Escaping hydraulic fluid under pressure can

penetrate the skin causing serious injury!

DANGER!

Proper function of the locking mechanisms

must be checked before any road transport;

Locking of the side wings and the ball valve for

the side wing hydraulics.

NOTE!

Turn off the tractor before making service or

adjustments to the machine.

Make sure that the tractor and machine won’t

move itself. Apply hand brake or wheel

wedges.

2.2. Hitching and unhitching

The harrow can only be hitched to the trailer hitch of the tractor. Follow all safety instructions
concerning the tractor when hitching or unhitching the harrow. There is a danger of crushing in
hitching and unhitching activities. Also beware the bruising of feet, fingers and arms. Do not disconnect
pressurised hydraulic connectors. When the harrow is hitched to the tractor, standing near the harrow,
and particularly its side sections, is forbidden.

2.3. Transport on public roads

When transporting the harrow on a public road, please take care and follow all orders under the Road
Traffic Act and special regulations concerning slow vehicles. Before moving, check the visibility of the
harrow's reflectors and the slow vehicle triangle as well as the functioning and visibility of the tractor's
lights. The reflectors, triangle and tractor lights must be maintained clean, as they affect the traffic
safety of the entire combination. When transporting the harrow, particular attention should be given on
the visibility of the rear turn signals. Always ensure that the harrow is sufficiently clean before transport
on public roads.
As standard, the harrow is fitted with reflectors at the extremities of the harrow to indicate the over
width portion of the towed machine. When driving on public roads, make sure that the lights of the
tractor are also visible from behind the harrow.

The maximum transport speed for the harrow with 300 tyres is 40 km/h and with 340 tyres 50
km/h.

5

1. Transport support pin

2. Spring cotter pin

The harrow has a transport support which prevents the machine lowering down accidentally in case of a
users fault or a sudden leak in the hydraulics. Transport support pin 1 must be set to its hole and locked
with pin 2 before any road transport.

Always before the road transport, make sure that the side wings have locked to the transport position.
Unintended opening of the wings should be prevented by closing the ball valve in the hydraulic hose.
Turn the lever crosswise to the hose. See section 4.4 in this manual.

2.4. Using the harrow

The operator must be familiar with the operation of the harrow and he/she must have the knowledge
and skills to operate the harrow correctly. The operator must study the operating instructions and
follow them.
The condition of the harrow, the tightness of the bolts and the tyre pressures must always be visually
checked before starting work. Never adjust or clean a moving harrow. During work, persons are
forbidden to ride the harrow or stand within the working area (safety distance 5 m). Safety distance
should also be kept while the harrow is not moving when the hydraulics is being used. Pressurised
hydraulic cables can release a deadly liquid spray. The side sections of the harrow can only be raised and
lowered when the harrow is not moving. When raising or lowering the side sections, ensure that no
persons are standing near the harrow. Before transport, ensure that the side sections are set to transport
position and locked. Before commencing working with the harrow, side sections must be fully lowered,
so that the cylinders are fully extended.
The side sections of the harrow should be raised and lowered by keeping the hydraulic pressure
continuously on during the whole movement. Interrupting the movement may disturb the function of a
valve in the system and the side sections will not move at the same time. Sudden change to the balance
may cause the harrow to tip over. This applies in particular 800 – 1500 harrows.

6

2.5. Maintenance

For maintenance, the harrow must be stopped and it must be blocked to stop it from moving.
Maintenance must be carried out on an even and stable surface to prevent the harrow from tipping
over or moving. Note the danger of slipping: Do not step on any part of the machine.
Maintenance-related and other measures should not be carried out when the harrow or one of its parts
is raised and unsupported.

When maintenance is carried out to the harrow, the side blocks must be lowered. In any event, ensure
safe working conditions and sufficient lighting. Turn off the tractor and release the pressure from the
hydraulics before handling any hydraulic hoses or components.
Only use original spare parts in the maintenance of the harrow. Using non-original spare parts will void
the warranty.

7

3. COMMISSIONING AND BASIC ADJUSTMENTS

3.1. Measures before commissioning

The sections of the harrow requiring lubrication have been lubricated at the factory and oil has been
driven to the cylinders during test runs. Still, it is recommended to review the lubrication points before
the first period of usage. Lubrication points are described in section 7 MAINTENACE PROGRAMME,
LUBRICATION.

3.2. Hitching to tractor

Attach the towing eye of the harrow's drawbar to the hydraulic tow hitch of the tractor. Note the safety
distance. Ensure that the hitch of the tractor locks on and that the hitch is not supported by the lifting
device.
Remember that pressurised hoses should never be handled and the hydraulics should be depressurised
before handling.

Hydraulic hoses are marked with colourful collars. Hoses are connected to dual purpose outputs.

Optima T500 - T700 :

The tractor must have 2 dual purpose hydraulic outputs.

The selector valve of the harrow directs the oil to the levelling board cylinders or the opening/closing
cylinders of the side sections depending on the height setting of the harrow. The operation of the
selector valve is described in section 3.4

Optima T800 - T1500

The tractor must have 3 dual purpose hydraulic outputs.

NB! All models: Ensure that the dual purpose valve used for height adjustment is actually set to
function as dual purpose and that the float position of the valve is not activated. If the float position
remains activated during height adjustment, this may result in the changing of the harrow's working
depth between sections during tillage!

NB! Optima T800 - T1000 : The raising cylinders of side sections must be connected to a hydraulic
output with a float position. The float position of the side section's raising cylinders must always be
activated during tillage. The float position allows the oil to flow freely in both hoses.

Adjust the pulling arms of the tractor to a height at which they do not become in contact with the
drawbar or hydraulic hoses during turning. When you unhitch the harrow from the tractor, remember to
also disconnect the hydraulic connectors.

Action

Marking the hose

Working depth

- down

1 x red

Working depth

- up 2 x red

Levell

ing board up / open side sections

1 x black

Levelling board down / close side sections

2 x black

Action

Marking the hose

Working depth

- down

1 x red

Working depth

- up 2 x red

Close side sections

1 x black

Open side sections

2 x black

Levelling board down

1 x blue

Levelling board up

2 x blue

8

3.3. Adjusting hydraulic hoses

After hitching the harrow to the tractor, adjust the hydraulic hoses between the hose rack and tractor to
a suitable length. The length of the hoses can be adjusted by loosening the hose rack lock (point 1 in
the illustration, x 3). Extra hose is left looped in the rack. Tighten the bolts after making the adjustment.
The length of the hoses is correct when the hoses do not become in contact with the tractor's pulling
arms during turning. The length of the hoses is too short if they tense up and disconnect from the
tractor's hydraulic connector during turning. The smallest allowed diameter for a hose loop is 200 mm.
If the diameter is too small, the loop must be opened and the hoses placed on the rack without looping.
If the loop is too small, there is a danger of breaking the hoses. Turn off the tractor and release the
pressure from the hydraulics before handling the hydraulic hoses

3.4. Side section and front levelling board hydraulics selector valve, Optima T500 - T700

In models Optima T500 - T700, the levelling board hydraulics and the side section hydraulics function
alternately using the same tractor valve, depending on the height adjustment of the machine. When
the harrow is raised up for transport, the selector valve in the frame of the machine directs the hydraulic
pressure to the lifting cylinders of the side sections. When the machine is in work position, the valve
directs the pressure to the levelling board cylinders. The valve operates automatically when the height
of the machine is adjusted between the work and transport positions. The selector valves are located in
front of the axles, in the centre section of the harrow and they are actuated from the axles through the
actuator arm.

Actuator arm of

the selector

Selector valve

9

Troubleshooting in the event that the side sections cannot be raised, Optima T500 - T700 :
Feel whether the pressure reaches the hoses of the side sections' lifting cylinders when the side sections
are raised.

• There is pressure -> Check that the hydraulic return connector is properly attached to the
tractor and that the hoses are not pinched anywhere. Quick connectors are not always
compatible with the tractor's connectors. Also test in another hydraulic return. Change another
quick connector to the hose.

• No pressure -> Lift the harrow up to the transport position. Check whether the selector valve
spindles are moving. The spindles can be moved manually by twisting their actuator bar. Check
whether the actuator bar of the selector valves is properly attached and that it is not kinked. If
the levelling board is working also when the harrow is raised up, the problem is that the
spindles of the selector valves have not moved.

3.5. Operating principle of the front levelling board and depth adjustment hydraulics

The front levelling boards and the depth adjustment in models
equipped with fully hydraulic depth adjustment are operated by
three series-connected cylinders. The series-connection of
cylinders means that the oil flows from the piston side of one
cylinder to the rod side of the other cylinder. The oil only flows
through the tractor's valve to the first and last cylinder. All the
cylinders in the series are of different sizes, so that the oil volume
of the piston side corresponds to the volume of the next
cylinder’s rod side. Both the levelling board and depth
adjustment circuits have a double operated pilot valve that keeps
the working depth set even in the case that the valve of the
tractor leaks.

3.6. Synchronizing the cylinders

Series-connected cylinders must be set to the same level for them to work precisely.
Cylinders are synchronized by fully extending the cylinder rods using tractor hydraulics and maintaining
the pressure for about 30 seconds, and running the motor on low rpm. When the cylinder rod is fully
out, the oil can flow through a small opening past the piston to the next cylinder. Hydraulic oil flows
through all cylinders in the circuit, setting them to the same level and bleeding possible air out from the
system. Moving the cylinders back and forth will not synchronize them.
Synchronizing of depth and levelling board cylinders must always be carried out at the beginning of an
operation period. And always after changing a cylinder or a hydraulic hose to these circuits. Depth
adjustment cylinders must be synchronized at times also during tillage keeping the pressure on for a
few seconds.