MAREDO GT 230 User manual

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Operator manual
Maredo® GT 230
REV. 051 HiSpeed-Corer
SERIAL #:
IMPORTANT NOTE:
The required (hydraulic) power depends on the working depth, soil
conditions, working speed etc. The condition of the triplex greensmower
and the ambient temperature determine the available capacity. Everybody
should check the greensmower during work if it isn’t overloaded by
checking the heat built up and take the correct measurements.
MAREDO DOES NOT TAKE ANY LIABILITY FOR
GREENSMOWER DAMAGES.
MAX. ENGINE REVS : 75% OF MAXIMUM
MAX GROUND SPEED: 4 KMH/ 2.5 MPH
Note:
For a safe operation it is essential, that the operator reads and
understands the manual of the Maredo head and the triplex
machine.
MAREDO BV, RIJKSSTRAATWEG 16, 3956 CR LEERSUM, THE NETHERLANDS
WWW.MAREDO-BV.COM. EN 1911

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SAFETY INSTRUCTIONS
1. Never disconnect or shortcut any of the safety devices.
2. Every MAREDO user must be fully informed and understand the
safe use of the MAREDO machine.
3. Inspect the ground, where the MAREDO machine is to be applied.
Remove loose obstacles, avoid uneven areas.
4. Drive carefully during work and during transport.
5. Ensure that other people are standing at least 4 mtr./ 12 ft
away from the MAREDO machine during work and transportation.
6. Use appropriate clothing. Wear strong shoes with steel enforced
toe caps, long trousers, gloves, tie up long hair and use protection
glasses for the eyes.
7. Never overload the MAREDO. This is visible when the head starts
to vibrate or behave unstable.
8. Check the MAREDO minimal once a week, to ensure there are
no loose bolts and nuts. Check for damages too and repair them.
9. The MAREDO may never be used without protection covers and
safety decals.
10. Use only original MAREDO spare parts, in order to ensure the
safe operation of the machine.
11. Never use the MAREDO in the dark, in heavy rains, on frozen
grounds, stony conditions and/ or on slopes steeper than 30
degrees.
12. Maintain a log book of all repairs made.
13. Be aware that changes made at the MAREDO, releases MAREDO
from CE regulations. You should homologate the machines yourself
4 mtr/ 12 ft 4 mtr/ 12 ft

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FOREWORD
Congratulations on the purchase of your MAREDO®. To ensure the safe and
long-lasting operation of the MAREDO machine, you and anyone using the
machine, should read and understand this user’s manual.
Also ensure that you understand and practice the safety rules, as described
in this manual.
This MAREDO machine is delivered accomplished by a guarantee
against material and assembly errors. This guarantee applies for a
period of 12 months, as from the date of purchase.
TECHNICAL SPECIFICATIONS
Model : GT 230- 051
Working width : 520 mm/ 21” per head
Working depth : 5 -25 mm/ 0.25- 1.0”.
Hole spacing : 0- 45 x 45 mm/ 0- 1.77 x 1.77”
Driving speed : 0.5- 4,0 km/h. / 0.3- 2,5 mph
Weight : 52 Kg/ 120 lbs per head.
EU- declaration
We, MAREDO, Rijksstraatweg16, 3956 CR Leersum, The Netherlands,
hereby declare fully on our authority, that the product:
MAREDO GT 230, with serial number as indicated on the machine and
written on this manual, to which this declaration applies, has been
manufactured in line with NEN-EN –ISO 14121-1:2007, according to the
stipulations of The Machine Directive 2006/42/EG.
Marinus Reincke Maredo BV The Netherlands

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TIPS/ REMARKS
1.Do not use the corer unit in wet conditions. The tines may clog and your
turf damaged.
2. Clean the unit regularly with air or low pressurized water. DON’T USE
HIGH PRESSURIZED WATER. The water can enter the bearings causing them to
seize.
3. Use the trolley to move the heads easily to your triplex. Next connect the
head to your triplex. In some cases, you need to raise the head and remove the
trolley, before you can mount the hydraulic motor.
4. Be careful with tightening the hydraulic motor bolts. Do it evenly and do
not over tighten. The ears of the hydraulic motor may crack.
5. Raise the heads and see if they stay in the right position and does not hit
anything. If it does, make some adjustments till if fits well.
5. Be sure that the heads do have enough ground clearance. Otherwise the tines
can hit the ground during transport, causing the rubbers to crack.
7. Make your first test run outside the green. Vary with the engine throttle and
the driving speed, if the holes do not look nice. Continue till you are satisfied.
8. Be sure that the hydraulic motor speed setting of the triplex is set at its
maximum. Next use only 70-80% of the max engine rev’s. NOTE: AT THE MOMENT
YOU HEAR A SMALL HAMMERING NOISE, YOUR ENGINE/ REEL RPM’S ARE TOO
HIGH AND/ OR YOUR RUBBERS ARE WORN.
9. If the hole edge is damaged, play with the groundspeed. You also may need to
adjust your working depth. Or you may need to remove your core collector
(scraper) at the back. On weak turf, this scraper can hurt the hole edges.
10. Be careful with dropping the units on a hard (concrete) floor. Put
something (trolley or rubber carpet) underneath to protect the tines against folding.
Damage to the 9heads may occur.
11. Check bolts and nuts regularly. Re-tighten if necessary.
12. The core collector has a limited capacity. Make short passes, if you want to
collect all the cores to one side of the green.
13. The hole spacing in drive direction is set by the ground speed. Play with the
groundspeed to get the right spacing and the correct hole.
14. Do not over-tighten the tine secure bolts, as the threaded holes get damaged.
15. START AND STOP PROCEDURE: Set the engine throttle at appr. 60%. Drop
the heads and move forwards. Increase throttle till 75% of max revs. At the end of
the pass STOP MOVING FORWARDS and raise the heads. If you don’t stop, the
tines may FOLD BACKWARDS (especially TORO) and damage the rubbers or the
turf.
16. You can make curves with the heads during work, BUT DO NOT MAKE TIGHT
CURVES. Damage to the units and green may appear.
17. The opening of the hollow tines should face to the rear of the machine,
otherwise the hole edge will get damaged.
18. CHECK THE (HYDRAULIC) DRIVE OF THE GREENSMOWER REGULARLY.
DO NOT OVERHEAT THE (HYDRAULIC) DRIVE. MAREDO IS NOT
RESPONSIBLE FOR DAMAGES TO THE GREENSMOWER.

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FIRST SETUP:
The heads are standard delivered with the motor connection at the Right-
hand side.
We can easily swop this to the Left Side by removing the clutch parts and
mount them at the other side of the machine (swop the side weights at the
same time). Make sure you mount them in exact the same position as
before (do not mirror them).
Next, a parts kit is needed to mount the head to your triplex greensmower.
Maredo has several kits available. Each kit comes with its own mounting
instructions and parts-list.
MAINTENANCE
CHECK BOLTS
AND NUTS REGULARLY
DON’T USE HIGH PRESSURIZED WATER TO CLEAN
ADJUSTMENTS/ IMPORTANT NOTES
The working depth can be changed, by moving
The front roller up or down. Loosen the 2 x 2
bolts, adjust both sides evenly and tighten again.
DO NOT OVERTIGHTEN THESE NUTS
The rear scraper can be removed or simply be
tied up. Use a ty-rap or rope and pull the
scraper up.
If the core collector is too aggressive, put an
elastic band in the centre, which takes some
weight off.
In case the core collector hit the rear wheel,
move the complete head forward, or remove the scraper completely.

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The bottom scraper plate is split in 3
sections. If we work with one and position it
in the centre of the triplex wheel behind, we
can make longer passes. The cores will be
divided and laid down aside the wheel. We
can make long passes without the wheel
squeezing the cores anymore.
The rubbers are a wear part. The life time depends
on the usage. Replacement is easy.
The opening of the hollow tine should face to the
rear.
Do not over tighten the tine secure bolts.
The timing of the cams is very critical. The
sequence is: 1,6,2, 4,3,5.
Check and re-tighten (+Loctite) the main nut on
the main shaft. Otherwise the tine sections become
loose and vibration occurs.
For inspection or easy rubber replacements, you
can easily turn the complete tine sections around,
if you loosen the U bracket from the main frame.