OVERUM CT User manual
Instruction manualInstruction manual
Conventional ploughsConventional ploughs CTCT
This instruction manual deals with Överum conventional ploughs type CT
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Contents Page
1Description of function 2
1.1 Identification of plough 3
2General safety precautions with safety signs 4
3Technical description 5
3.1 Checking the tractor prior to ploughing 5
3.2 Preparation of plough 6
3.3 Mounting the plough onto the tractor 6
3.4 Checking the plough 7
4Basic settings8
4.1 Basic settings mounted ploughs 8-9
4.2 Adjustment of skimming device 10-11
5Stone trip system 12
5.1 Shear bolt protection (F) 12
5.2 Hydraulic type (H) 12
5.3 Adjustment of operating pressure 13
5.4 Checking the accumulator 13
6Adjustment of working width 14
6.1 Adjustment of working width 14-15
7Care, maintenance and replacement of wearing parts 16
7.1 Greasing of the beam hinge points 16
7.2 Winter storage 16
7.3 Replacement of wearing parts 17
7.4 Mouldboards, Tightening torques 18
7.5 Lubrication chart 19
8Extra equipment 20
9Useful advice 21
Read these instructions carefully. If you follow the instructions given, YOU can expect good results
along with a good economic return from YOUR choice of plough.
If carefully operated, adjusted and maintained, the plough will meet all reasonable demands made on it
and will give YOU reliable service in years to come. Should YOU need further instructions, which
are not included in this manual, or require the help of experienced service personnel, we advise YOU
to contact one of our local representatives, which also will have spare parts in stock.
It has always been the ambition of Överums Bruk to constantly improve its products. Consequently,
in the interest of product improvement, no specification is final or binding and we reserve the right to
alter the design of new machine series and equipment without previous notice.
Överums Bruk AB
SE-590 96 Överum
Telephone: Int+46 493 361 00
1. DESCRIPTION OF FUNCTION
The plough is designed only for ploughing of all types of soil, and for transport between the farm and the
different fields.
The plough is to be attached to the three-point linkage at the rear of the tractor, with the hydraulic systems
connected to the appropriate hydraulic outlets.
Description of the plough
CT 4980 Mould board shin Mouldboard Share Point
Stone trip
cylinder
Cross-shaft
Disc coulter
Accumulator
Överums Bruk AB S-590 96 Överum Sweden
1.1 Plough identification
Type designations
Mounted conventional plough CT 2975 – 51080
Stone trip device H= hydraulic
F= fixed (shear bolt)
Beam height 75 = 75 cm
80 = 80 cm
Plough body spacing 9 = 90cm
Number of plough body pairs
Type
CT 4975 H
03 276893
Serial number
Complete the sign below with the TYPE DESIGNATION and the SERIAL NUMBER of Your plough.
Överums Bruk AB S-590 96 Överum Sweden
2. GENERAL SAFETY PRECAUTIONS WITH
SAFETY SIGNS
Safety signs
Carefully follow the Operating Instructions and Safety Signs, which warns for risks
when personal injuries can occur. Avoid accidents by always following the safety
precautions.
Read "Operator's Manual". Safety signs with no text are
used on these ploughs. Replace any missing safety decals
or any that have become illegible.
§Ensure that no person is on, underneath or in the
hazardious area of the plough during transport, or
ploughing.
§Never work with components in the hydraulic stone
release system unless the pressure is omitted.
§Be alert, there is always a risk for injuries when adjusting disc coulters and
skimmers.
§Operator competence. The operator must be well acquainted with the different functions of the
plough and be knowledgeable of how to operate it with safety. Consult the tractor manufacturers
manual on mounting implements and safe working methods.
§Ensure that the plough is locked with the correct locking pins onto the three-point linkage on the
tractor.
§Secure the lower link stabilizers on the tractor when the plough is transported on the road.
§The brake pedals on the tractor must be locked together when driving on the road.
§All hydraulic connections between tractor and plough must be made in accordance with the
instructions given.
§Never park the tractor with the plough in an uplifted position.
§Always use the support leg when parking the plough.
§Never attempt to clean or adjust the plough during operation.
§Never touch the gas valve on the accumulator.
§Wear suitable gloves when replacing wearing parts which can have sharp edges.
§The plough must always be attached to the three-point linkage on the tractor when altering the
working pressure in the hydraulic stone release system.
§Adapt the ploughing speed to suit the ground conditions. DRIVE CAREFULLY.
§Maximum transport speed 25 km/h.
§These rules however do not exempt the operator from the responsibility to observe relevant
statutory or other national regulations dealing with road safety or labour safety issues.
3. TECHNICAL DESCRIPTION
3.1 Checking the tractor prior to ploughing
Function of the three-point hitch
The design of the three-point linkage is based on the principle that the tractor and the plough should
operate as one unit. This function is depending of the settings for the lower links and the top link. These
components must therefore be maintained in a condition that enables them to be easily adjusted.
Hydraulics
Following external hydraulic outlets are required:
CT 1 double-acting
If the plough is equipped with hydraulic front furrow adjustment cylinder one extra double acting
hydraulic outlet is required.
Familarize yourself with the hydraulic systems of the tractor.
Wheel adjustment - Track width
For ploughing purposes, track width is always measured between
the inside walls on the tractor tyres.
The measurement between the inner walls of the front wheels must
be at least equal to the inner measurement between the rear wheels,
but may be up to 10 cm wider.
The distance between wheels must be symmetrical, relative to the
centre line of the tractor.
The following track widths are recommended: 1200 - 1500 mm
Ideal track width = 3 x the furrow width + 100-150 mm
(Example: 16" furrow width 3 x 400 + 125 = 1325 mm)
When ploughing with "wide tyres" the outside walls of the front
and the rear tyres should be parallel.
The furrow widener knives should be mounted on the last plough
body.
Tire pressures
Both tyre life and optimum traction are achieved by using the correct tyre pressure. Over-inflation
will increase wheel slip. Make sure that both rear tyres are inflated to the same pressure.
Front ballast weights
The front of the tractor should be fitted with balance weights as required to maintain optimal traction and
directional stability.
3.2 Preparation of the plough
Check that the quick-couplings on the hydraulic hoses are the same type as the quick-couplings on the
tractor. If required, fit the correct quick-couplings, to suit your tractor.
Check that the cross-shaft on the plough has the correct category to suit your tractor.
Cross shafts are available in different categories:
Cat. 2 means ø 28 mm cross-shaft pins
Cat. 3 means ø 36 mm cross-shaft pins
The length of the cross shaft is determined by the track widths of the tractor and the spacing of the lower
links on the tractor's rear axle. When the spacing is > 550 mm on the tractor's rear axle, use the 965 mm
long cross shaft.
Cat BC
2825 ø 28
2L 965 ø 28
3965 ø 36
3.3 Mounting the plough on to the tractor
Make sure that the lower links can be lowered approximately 20 cm below the cross shaft of the plough
before the plough is mounted onto the tractor.
Check that the link ball joints are of the same category as the cross shaft pins. Lock the cross-shaft into
the tractor’s lower links with sufficient locking pins.
The stabilizers for the lower links should be adjusted so that the plough can move freely in working
position but when raised the side movements should be limited.
The top link should be mounted slightly higher on the plough than on the tractor.
Consult the tractor manufacturers manual on mounting implements
and safe working methods.
3.4 Checking the plough
•Check the tightness of all bolts and nuts
•Grease all lubrication points
•Check the tyre pressure 23 x 8,5-12 240 kPa (2,4 bar)
•Check that the desired furrow width is correctly, set see page 14.
•MOULDBOARDS
For best results, the protective paint on new mouldboards should be removed before using the plough
for the first time. Use of a paint stripper is the easiest way of removing the paint. The paint can also
be removed by using a scraper or a similar tool. Under no circumstances should the paint be burned
off, since the necessary heat would ruin the temper of the steel. This also applies to any disc coulters
and skim coulters used.
•Check the disc coulter and skim coulter settings and adjust them so that the settings are identical.
•Raise the plough and fold up the support leg.
•Always remember to re-tighten all nuts and bolts after about 3 hours of use, after that
check the tightening of the bolts regulary.
Stone trip device (H-system)
Check the working pressure by reading the pressure gauge. For suitable working pressure, see page 13.
4. BASIC SETTINGS
4.1 Basic settings, mounted ploughs
The basic setting can be started when the desired ploughing depth has been reached and when the tractor
wheels are running in a furrow with the same depth.
1. Vertical adjustment
Ensure that the plough beams are at right-angle 90º to the ground. If necessary, make adjustments by
using the right-hand lower link of the tractor. The angle is best seen when standing behind the plough.
2. Horizontal and depth adjustments
Mount the top link so that it is 5-10 cm higher on the plough than on the tractor when in working position.
The top link bracket of the plough is adjustable laterally in two positions.
Ensure that the front and rear plough bodies are ploughing at the same depth, the plough frame should be
parallel with the ground. Adjust by altering the length of the top link.
The ploughing depth should be controlled by means of the tractors draught control in combination with
the depth wheel of the plough. This provides a good weight transfer in hard parts of the fields and a good
control of the working depth in lighter soils.
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