SaMASZ FP 20 User manual

SaMASZ Sp. z o.o.
Poland, 16-060 Zabłudów, ul. Trawiasta 1
Established
–
1984
NIP PL-966-159-29-76
tel. (+48) (85) 664 70 31
fax (+48) (85) 664 70 41
e-mail: sama[email protected]
www.samasz.pl
OPERATOR'S MANUAL
TREE STUMP GRINDER
FP 20
Suitable for extension arms:
KWT, CAMEL
IN336EN002
08.09.2017
EDITION NO. 2
Translation of the original operator’s manual
– English –
Nr. Serial no.

This operator ’ s manual is indispensable part of any tree stump grinder and is to familiarize
future user with principles of proper operation and use of the machine as well as the risks involved.
Before first commissioning of the machine learn thoroughly the content of this operator's manual
and safety advices herein.
Keep this manual for future use.
Apart from this Operator's Manual observe also operator's manual for KWT or Camel
extension arm.
Tree stump grinder is intended only for grinding tree stumps, bushes and hedges. Any use
other than the above shall be considered as misuse. In order to operate the machine as intended
requirements concerning operation, use and repair as advised by the manufacturer should be met
and followed carefully.
Apart from recommendations concerning the intended use of the machine, pay attention to
its maintenance. Keep it in operational condition. Use original spare parts only.
Tree stump grinder should be operated, serviced and repaired only by personnel who are
trained in technical servicing and familiarized with safety procedures.
Always follow provisions concerning accident prevention, and any basic occupational health
and safety provisions as well as road traffic rules.
Should you have any questions concerning commissioning and operation of the machine,
please contact the manufacturer ’ s service.
The manufacturer shall not be liable for damages resulting from unauthorised repairs and
modifications of the grinder's design without the manufacturer's prior consent.
In the case of resale of tree stump grinder to other user, the delivery of the operator ’ s manual
must be confirmed in writing.
ATTENTION!
Instructions given in this operator’s manual marked with this symbol and
warning signs provided on the machine inform about a risk.
ATTENTION!
Keep this manual for future reference.
Well-proven design with thousands of machines in regular use in many countries and quality
materials ensure high durability and reliability of SaMASZ machines.
We congratulate you on the purchase of your new SaMASZ machine and wish you much pleasure
and the very best work results through the years to come.

Operator’s manual
TREE STUMP GRINDER
FP 20
- 1-
Contents page
1.
IDENTIFYING THE MACHINE...............................................................................................2
2. INTRODUCTION........................................................................................................................2
3. INTENDED USE AND DESIGN ................................................................................................3
3.1 Specifications .........................................................................................................................4
3.2 Description of branch grinder and working principle............................................................4
3.3 Equipment and fittings ...........................................................................................................5
4. SAFETY PRECAUTIONS ..........................................................................................................5
4.1 Safety rules.............................................................................................................................5
4.1.1 Operating........................................................................................................................5
4.1.2 Attaching ........................................................................................................................6
4.1.3 Operation........................................................................................................................6
4.1.4 Inspection and repair ......................................................................................................7
4.1.5 Replacement of damaged or worn parts.........................................................................7
4.1.6 Storage............................................................................................................................8
4.1.7 Qualifications of operator...............................................................................................8
4.1.8 Transport ........................................................................................................................8
4.1.9 Putting the machine onto another vehicle for transport .................................................8
4.1.10 Hydraulic assembly ........................................................................................................9
4.2 Residual risk...........................................................................................................................9
4.3 Safety labels .........................................................................................................................11
5. OPERATING..............................................................................................................................12
5.1 Attaching the tree stump grinder to the extension arm ........................................................12
5.2 Transport position and drives...............................................................................................13
5.3 Operation..............................................................................................................................13
5.3.1 Basic information about the operation .........................................................................13
5.3.2 Initial adjustment and preparing for operation .............................................................14
5.3.3 Safe start up and shut down..........................................................................................15
5.3.4 Control..........................................................................................................................15
5.3.5 Proceedings in case work unit is locked.......................................................................15
5.3.6 Dismounting machine from the extension arm ............................................................15
6. MAINTENANCE AND SERVICE...........................................................................................15
6.1 Daily maintenance................................................................................................................15
6.2 After-season maintenance and storing .................................................................................16
6.3 Restarting the machine after repairs or longer storing periods ............................................16
7. MALFUNCTIONS AND THEIR REPAIR .............................................................................17
8. DISMOUNTING AND WITHDRAWAL FROM USE ..........................................................18
8.1 Repair ...................................................................................................................................18
8.2 Disassembly and scrapping..................................................................................................18
8.3 Environment.........................................................................................................................18
9. WARRANTY CARD .................................................................................................................19
10. WARRANTY TERMS...............................................................................................................19
10.1 Warranty terms.....................................................................................................................19
10.2 Warranty repairs record .......................................................................................................21

Operator’s manual
TREE STUMP GRINDER
FP 20
- 2-
1. IDENTIFYING THE MACHINE
Each tree stump grinder can be clearly identified owing to its data plate, which is attached to
the linkage body as shown below Fig. 1.
Fig. 1. Data plate location
Data plate includes
:
-
name and adress of the manufacturer,
-
model year
,
-
CE marking means, that the produce
-
version number
,
conforms to 2006/42/EC Directive and
-
machine w
eight
,
harmonized standards
,
-
id number
,
-
machine symbol
,
-
barcode
.
-
date of manufacture
,
CAUTION:
In case the operator's manual is unclear or illegible all necessary information
can be obtained from manufacturer or the dealer.
2. INTRODUCTION
 This operator’s manual should be considered as the basic tree stump grinder’s equipment. If the
machine is handed over to another operator, it should be in working condition and given away
along with operator’s manual and it’s other basic equipment.
 Prior to operating the tree stump grinder its user must familiarize himself with this manual as
well as common work safety rules.
 The tree stump grinder is manufactured in accordance with requirements of safety standards.
 Respecting warnings herein shall ensure full operation safety.
 If you have any questions related to commission and operation of the tree stump grinder, please
contact the manufacturer.
 This operator’s manual is an indispensable part of any machine and is intended to familiarize
future user with principles of proper operation and use of the machine as well as the risks
involved.
GENERAL PRECAUTION
When operating the machine warnings and safety rules marked with this sign
herein should be respected.
CAUTION:
Operating the machine without previous familiarizing with its content as well
as by unauthorized personnel, and especially by children, is strictly forbidden.

Operator’s manual
TREE STUMP GRINDER
FP 20
- 3-
3. INTENDED USE AND DESIGN
Being an additional equipment of an extension arm, the tree stump grinder is intended for
works near roads and in orchards for grinding tree stumps, bushes and hedges. Using the grinder
tree stumps of any diameter can be ground, however within the machine's maximum feed rate and
capacity.
CAUTION:
Do not use tree stump grinder for grinding non-wooden materials!
Tree stump grinder FP 20 is designed to cooperate with the following extension arms:
•KWT 550 – 5.50 m
•KWT 650 – 6.50m
The grinder can be mounted also on other type of extension arm with the same type of a
mounting plate or any other upon its previous adaptation.
Fig. 2. Mounting plate for tree stump grind
CAUTION:
It is forbidden to use the machine for purposes other than those listed in this
instruction. Using the machine for other purposes will be classified as use not
according with the intended use and could exclude the manufacturer from
responsibility from any resulting damages. The machine should be used,
serviced and repaired only by persons familiar with its characteristics and with
safety regulations. Unauthorized modification of the machine may release the
manufacturer from responsibility for any resulting malfunctions or damages.

Operator’s manual
TREE STUMP GRINDER
FP 20
- 4-
3.1 Specifications
Tab. 1. Technical characteristics of tree stump grinder
Characteristic parameters FP 20
Cutting disk working diameter 0,4m
Cutting knife count 16 pcs.
Grinder
’
s dimensions (length/width/height) 580mm / 380mm / 530mm
Rotational speed of cutting disk 3500 rpm
Nominal WOM rpm
(for SaMASZ extension arm)
700÷1000 rpm
Recommended hydraulic oil demand for tree
stump grinder
90÷100 l/min
Max. permissible pressure 40 MPa
Weight 90 kg
Mounting on extension arm 6 bolts M14x50
Nozzles of hydraulic hoses EURO G 1”
Transport speed Max 25 km/h
Number of operators One person
Drive type hydraulic
Level of noise emitted by
the machine
L
pA
95 ± 1 dB
L
Amax
106 ± dB
L
Cpeak
109 ± dB
L
pA
– level of noise exposure related to an 8-hour work shift. Time-averaged acoustic pressure level
for emission corrected by frequency characteristic A.
L
Amax
– maximum value of measurement for acoustic pressure level for emission corrected by frequency
characteristic A.
L
Cpeak
– peak acoustic pressure level for emission corrected by frequency characteristic C.
3.2 Description of branch grinder and working principle
Fig. 3. Tree stump grinder FP 20
1
-
Mounting plate
4
-
Cutting knife with knife holder
7
-
Support leg
2 - Grinder housing 5 - Hydraulic engine 8 - Rubber guard
3
-
Cutting disk
6
-
Nozzles of hydraulic hoses
3
2
1
4
5
6
8
7

Operator’s manual
TREE STUMP GRINDER
FP 20
- 5-
Tree stump grinder comprises a fixed housing (2) combined with a mounting plate to make a
single pie (1) and a movable cutting disc (3) z with replaceable cutting knives (4) of cemented
carbide mounted on holders. The disk is mounted on engine’s shaft, which is bolted to the housing
(2).
On the mounting plate (1), there are 12 boreholes for mounting, 6 holes each (arranged as in
Fig. 2) for attaching an extension arm what enables setting the grinder in 4 positions in relation to
the arm, by rotating it by 90˚ on the retaining pin axis.
3.3 Equipment and fittings
The machine are sold with the following standard equipment:
 warranty card,
 operator's manual with spare part list and the Declaration of Conformity,
 spray paint (150 ml).
Equipment and spare parts:
 all parts in the spare part list.
4. SAFETY PRECAUTIONS
CAUTION:
Tree stump grinder is a device the use of which involves risk. The machine
can only be operated by personnel who have learned this manual.
Each operator of the tree stump grinder should be fully aware of potential risks
resulting from its operation and principles of their prevention.
When operating the tree stump grinder always wear protective clothing and
footwear as well as adequate personal protective equipment:
 Protective helmet
 Ear protection
 Protective gloves
Operator should always have a first-aid kit within his reach
(Journal of Laws No. 12/98 item 51.)
4.1 Safety rules
4.1.1 Operating
 During operation of the machine the Regulation of the Farm Ministry and Food Economy
(Rozporządzenie Ministra Rolnictwa i Gospodarki Żywnościowej) from 12.01.1998 dealing with
safety and hygiene during the operation of tractors, machinery, tools and equipment used for
farming (Journal of Laws No. 12/98 item 51), should be observed.
 Before operating the tree stump grinder learn content of this operator's manual and follow rules
provided by the Manufacturer herein.
 Apart from this operator’s manual follow the instructions as given in the extension arm
operator's manual.
 Do not use the tree stump grinder for any purposes other than its intended use.
 Do not introduce any design modifications without prior arrangements with the Manufacturer.
 Failure to learn the operator’s manual can result in damaging the tree stump grinder.
 The machine must not be operated by minors or handicapped persons.
 Observe all safety signs, warnings or warning signs placed on the machine.
CAUTION:
Be certain that children and animals are at a safe distance away from the
machine.

Operator’s manual
TREE STUMP GRINDER
FP 20
- 6-
4.1.2 Attaching
 Mount and dismount the tree stump grinder on an extension arm with the latter mounted on a
tractor, and when the whole aggregation is prevented against moving by the tractor’s parking
brake engaged.
 When connecting hydraulic hoses to the tree stump grinder's nozzles wear protective gear such
as eyewear, gloves and clothing.
 Mount and dismount the tree stump grinder from extension arm on an even and paved surface
while keeping particular attention.
 Tractor's 3-point linkage should be adjusted with tensioning chains, so as to ensure a stiff
connection between the tractor and the extension arm, onto which the tree stump grinder is to be
mounted.
 Tractor with the mounted aggregation of the extension arm and the tree stump grinder should be
balanced so as to provide the stability of the aggregation including the tractor and the extension
arm.
 In order to mount the tree stump grinder on the extension arm use original fittings and safety
devices only.
 When connecting hydraulic hoses to the tractor's hydraulic connectors make sure, that the
hydraulics on either the tractor or the extension arm aggregate are pressure free.
 Before connecting the hydraulics reduce pressure in hoses.
4.1.3 Operation
 When operating on public roads always respect the local traffic regulations and provisions
concerning warning lights.
 Admissible slope, on which the machine is able to operate is provided by the Manufacturer.
Angular value for safe operation on slope is 8º(Journal of Laws No. 12/98 item 51.)
 Unauthorised personnel and animals should keep away from the grinder for a safe distance,
which is at least 10 m from the machine. Keep particular attention when operating near roads
and lanes, where presence of unauthorized personnel is likely (Journal of Laws No. 12/98 item
51.)
 When operating the aggregation of arm and grinder, make sure the tractor is always equipped
with operator's cabin.
 Before operating, the machine should undergo a technical inspection. Pay particular attention to
the condition of basic connections of the machine’s assemblies as well as proper mounting of
the machine to the tractor.
 Each time before operating, check condition of the cutting knives along with cutting disk, and if
need be, deliver it for recovery or replace.
 Before starting the tractor, make sure that all drives are disconnected and control levers for
hydraulics are in neutral position.
 Before moving, make sure whether there are no unauthorised personnel directly nearby the
machine, give an acoustic signal.
 Never leave the tractor’s engine running without any supervision. Before leaving the tractor,
turn the drive off, set the aggregation of tractor and extension arm and the tree stump grinder in
a standstill position and remove the ignition key (Journal of Laws No. 12/98 item 51.)
 For any break in the machine operation, disconnect the drive (Journal of Laws No. 12/98 item
51.)
 Tree stump grinder should be operated with the PTO shaft running at 700-1000 rpm (applicable
for the SaMASZ extension arm).
 Perform any manoeuvring of the tree stump grinder only from the operator’s seat. Do not
control the machine from outside the tractor’s cabin.
 The operator is not allowed to leave the tractor while driving.

Operator’s manual
TREE STUMP GRINDER
FP 20
- 7-
 Operate the grinder only when the tractor is not moving, and move the grinder only by the
extension arm and adjust the operation to conditions such as size and number of tree stumps to
be ground.
 Do not operate the tree stump grinder after dusk.
 Do not leave the aggregation of tractor and extension arm on slopes or other inclinations
without providing any additional protection.
 Do not operate with damaged or missing guards (Journal of Laws No. 12/98 item 51.)
 In case of a fatal failure, stop the machine's drive, turn the tractor's engine off and take out the
ignition key. Then call for technical service, and if an accident (in this case: road accident)
occurs, respect first aid rules and contact responsible authorities.
4.1.4 Inspection and repair
 Perform any inspection, repair and maintenance works as well as cleaning parts or assemblies
when the drive is switched off and there is no pressure in the hydraulics, having taken the
ignition key off and set the aggregation of tractor and machine in a standstill position (Journal
of Laws No. 12/98 item 51.)
 Inspect bolts and other fasteners regularly. Do not operate with damaged or worn fasteners.
 Do not operate with damaged or worn fasteners. When the rubber guard shows signs of ageing
(e.g. micro cracks over the surface), it should be replaced.
 Do not perform any repair works underneath the lifted machine’s assemblies, unless protected
against free falling (Journal of Laws No. 12/98 item 51.)
 Replace damaged or worn (aged 5 years or older) hydraulic hoses and other hydraulic parts as
recommended by the Manufacturer.
 Never repair damaged hydraulic hoses with tape.
 Before any operation, check the condition of cutting knives. If blunt, rotate the knife by 1/3 turn
(3 sharp cutting edges per a single knife can be achieved), or handle it for a recovery. Damaged
or worn blades must be replaced.
 Use only original spare parts ordered at our store or at your dealer.
 During operation, maintenance and adjustment, always wear protective gloves, shoes and
clothing without loose elements, belts, etc. Always respect warnings on safety labels attached to
the machine.
 When operating the hydraulics, always wear protective eyewear and gloves. Hydraulic oil
leaking under pressure (40 MPa) may penetrate the skin and cause its irritation thereafter. In
such case, visit a doctor immediately.
 In the event of a serious failure, please call for technical service, and if an accident (in this case:
road accident) occurs, respect first aid rules and contact responsible authorities.
CAUTION:
Prior to maintenance and repair the machine, turn off the engine of tractor. All
rotating parts should be stopped.
4.1.5 Replacement of damaged or worn parts
 Any works related to replacement of worn or damaged parts should be done only after the
machine has been switched off, and having previously learned the contents herein.
 When conducting repair works or replacing worn or damaged parts wear protective gloves,
protective footwear as well as protective clothing without any loose elements.
 When operating with the machine lifted up, protect it properly with supports and when
replacing parts with sharp edges, use personal protective equipment and corresponding tools.
 Once works related to replacement of defective parts are completed, mount back all elements of
guards and safety devices.
CAUTION:
When conducting repair works or replacing worn or damaged parts wear
protective gloves.

Operator’s manual
TREE STUMP GRINDER
FP 20
- 8-
4.1.6 Storage
 Tree stump grinder should be stored under a roof and protected against access of animals and
unauthorised persons who could get injured.
4.1.7 Qualifications of operator
To provide safe machine operation each person being the machine operator must meet the
following requirements:
 Operator should hold driving license, have ability to drive vehicles safely and know road traffic
rules.
 Operator must be in proper physical condition to be able to operate the machine.
 Operator must not be under the influence of alcohol, drugs and medicines, which all have
influence on vehicle driving and machine operation.
 Operator should be familiarized with this manual and follow its provisions.
 Operator should be familiar with working principles of both the tractor and the machine, and be
able to recognize and avoid hazards resulting from operation of the aggregate.
4.1.8 Transport
 When driving on public roads always respect the local traffic regulations concerning warning
lights.
 For transport of the aggregation of arm and tree stump grinder, remove or partially disconnect
the PTO shaft from the tractor’s side.
 While transporting the above aggregation mount remote warning light device and warning
triangle for a slow driving vehicle.
 During transport, always set the tree stump grinder in its proper and safe transport position. See
section 3.3.
 Any modifications in the machine's position are possible only if no vehicles or unauthorized
personnel are around (children in particular).
 Do not drive over 25 km/h (15 mph).
4.1.9 Putting the machine onto another vehicle for transport
Both the driver and the carrier are responsible for the grinder's safe transport. Any equipment
and parts must be secured for transport. The following rules should be observed when placing a
machine onto a transport vehicle:
 Using lifting devices grab only stiff elements on the grinder such as housing and mounting
plate.
 In order to lift the machine, use only lifting devices of hoisting capacity bigger than the
grinder’s weight provided on the data plate.
 On the vehicle's trailer, the tree stump grinder should be protected against moving.
 For transport purposes tree stump grinder must be set in vertical position with mounting plate
up. Wrap tree stump grinder protected in such way with bubble foil and fix on pallets with duct
tape. Further machine shifting should be conducted with use of pallet considered as fully
integrated.
 To place the tree stump grinder on a pallet use belt suspension and lifting device with capacity
of no less than the tree stump grinder's weight.
CAUTION:
The person in charge of the machine's transport shall be responsible for
securing the danger area and performing the work.

Operator’s manual
TREE STUMP GRINDER
FP 20
- 9-
4.1.10 Hydraulic assembly
 Caution! Hydraulic assembly is under pressure! Hydraulic oil under pressure may permeate
through skin and cause serious injury, therefore skin and eyes should be protected in particular.
In case of injuries caused by a liquid under pressure, call a doctor immediately.
 Hydraulic hoses can be connected to tractor's hydraulics, provided that both the extension arm’s
and the tree stump grinder's hydraulic assemblies are not under pressure. To remove the
pressure from the hoses just simply restart the tractor's hydraulic valves several times, once the
tractor is off.
 When dismounting the machine from the tractor, set the equipment aside, deflate the pressure
from hydraulics and turn tractor's engine off.
 When controlling for hydraulic assembly's malfunction and looking for oil leaks, it is forbidden
to touch any potential leaks until the entire assembly is under pressure.
 CAUTION! It is recommended to use hydraulic oil featuring oil purity class <10 in
accordance with NAS 1638.
When using hydraulic hoses:
 Avoid stretching the hoses when operating.
 Do not allow hydraulic hoses to get deflected.
 Do not expose hydraulic hoses to contact with any sharp edges.
 If damaged or worn, replace the hoses with new ones.
 Useful life for hydraulic hoses is 5 years from their production date.
4.2 Residual risk
Despite the fact, that company SaMASZ Białystok – the manufacturer of the machine takes
responsibility for design and manufacturing of the rake, in order to eliminate dangerous situations,
certain risk during machine’s operation is unavoidable. Residual risk results from incorrect
behaviour of the tree stump grinder operator.
Major source of risk follows performance of these operations:
 operation of machine by minors as well as not being familiarized with operator's manual,
 operation of machine by persons under influence of alcohol or other abusive substances,
 not keeping caution while transportation and shifting of tree stump grinder during operation,
 transport of persons remaining on the machine,
 presence of persons and animals within the machine operation range,
 performing operations related to servicing and adjustment with engine on.
1. Danger of catching
This kind of risk is present when position of tree stump grinder is being changed, as a result
of operating near rotating parts.
During operation, maintenance and regulations always wear protective gloves, shoes and
clothes without loose parts, belts and so on. Always comply with safety decals placed on the
machine.
2. Danger of injury and abrasion
This risk is present when replacing working parts with sharp edges, cleaning the machine,
removing the clogging and jams. During any maintenance and repair works, always wear safety
gloves.
3. Danger of cutting limbs off
Contact between cutting knives and body may lead to serious injuries, and in extreme cases
amputation of limbs or even death. Failure to pay enough attention when operating the machine
nearby unauthorized personnel may cause an accident.

Operator’s manual
TREE STUMP GRINDER
FP 20
- 10 -
4. Danger of kick
Kick is one of the most dangerous accidents which are likely when operating tree stump
grinder. It is described as uncontrolled, sudden and very quick motion of an object or part of it
being processed (splinter, knurl, etc.). Direct impact of the material against human body may cause,
depending on the material weight and size, as well as speed and the impact location, bruises,
injections, loss of an eye, teeth, or even death due to damage to organs and vast internal
haemorrhages.
5. Danger of irritation to the respiratory tract
Lesser threat when cutting is also a dusty atmosphere as emission of significant fractions of
fine chips and dust. The operator thus should operate in a tight cabin with proper airflow.
6. Danger of liquid ejection out of hydraulic system
During connection of hydraulic hoses to hydraulic connectors make sure, that either the
extension arm’s and the tree stump grinder's hydraulic system is without pressure.
During operation of hydraulic system always wear protective glasses and gloves. Check
regularly hydraulic hoses.
CAUTION:
Residual risk results from incorrect behaviour of the machine operator.
7. Prohibited actions
Bear in mind the following bans when operating tree stump grinder:
 Do not remove impurities, make any adjustments or repairs when the grinder is operating.
 Never change the sequence of operation and maintenance works as specified herein.
 Never use the tree stump grinder, if it is not in operating condition.
 Never get near the machine’s operating parts.
 During repair and maintenance works at tree stump grinder, always follow descriptions included
herein, and perform them when the tractor’s drive is turned off.
 Before any works, focus your attention solely on the tasks to do.
 Never operate the tree stump grinder when being under the influence of alcohol, drugs or
medicines which impair your motor skills.
 Tree stump grinder cannot be operated by unauthorized and unskilled personnel.
 Tree stump grinder cannot be operated by minors and handicapped persons.
 When operating the tree stump grinder, observe whether there are no unauthorized personnel
and animals around.
When describing residual risk, the tree stump grinder shall be considered a machine, which
until the moment of its production had been designed and manufactured in accordance with the
state-of-the-art as per its manufacture date.
CAUTION:
Despite following the specified instructions and prohibitions, residual risk is
still present.
8. Residual risk evaluation
When keeping such recommendations as:
 thorough familiarizing with operator’s manual,
 no persons remaining on the machine when operating and during drives,
 no persons remaining within the machine operation range,
 adjustment, maintenance and lubrication of the machine with engine off,
 performing repairs of the machine only by skilled persons,
 operation of the machine by persons, which are familiarized with operator’s manual,

Operator’s manual
TREE STUMP GRINDER
FP 20
- 11 -
 in the event of the machine protection against children and unauthorized personnel residual risk
when operating the tree stump grinder may be limited to necessary minimum.
In the event when avoiding or eliminating professional risk resulting from
exposure to noise is not possible through use of mass safety device or work
organization, the employer (farmer):
1) makes available personal hearing safety devices if the levels of noise in
working environment exceed 80 dB.
2) makes available personal hearing safety devices and ensures they are properly
used if the levels of noise in the working environment reach or exceed 85 dB.
4.3 Safety labels
CAUTION:
Always comply with safety decals describing risks, and warning signs placed
on the machine.
CAUTION:
a) All warning decals (labels) should be clean and legible.
b) Lost or damaged decals (labels) must be replaced with new ones.
c) New decals (labels) may be ordered at the Manufacturer.
N-3
Before use read the operator’s
manual
N-4
Disconnect the machine before
approaching any service or repair
works
N-7
Operating is forbidden when any
person is within the danger area of
50 m / 170 ft
N-23
Caution: power lines
N-49
Do not remain in machine’s
swinging area
N-99
Danger of crushing
N-106
Warning: rotating elements
N-52
Wear protective gloves
N-100
Wear protective eyewear

Operator’s manual
TREE STUMP GRINDER
FP 20
- 12 -
N-101
Wear protective clothing
N-102
Wear protective helmet
N-103
Wear ear protection
CAUTION:
Spare assemblies used for the tree stump grinder repair should hold all
warning labels provided by the manufacturer.
5. OPERATING
5.1 Attaching the tree stump grinder to the extension arm
In order to mount tree stump grinder on extension arm do the following in a sequence:
 place pallet with tree stump grinder on an even and paved ground,
 drive the tractor with the attached extension arm and position the mounting plate of the arm so it
matches the grinder's mounting plate. In the case of inaccurate positioning of the arm against the
grinder, it can be moved using holes drilled on the housing sides and either steel bar or tube.
 secure the tractor against moving,
 shut off the engines and remove the ignition key,
 mount the grinder's mounting plate on the arm's mounting plate with the grinder's mounting
plate retaining pin and secure with a spring cotter, and then bolt the grinder's mounting plate to
the arm's mounting plate with 6 bolts and M14 nuts. With use of the pin it is possible to rotate
the tree stump grinder in four directions against the arm, having previously removed bolts and
nuts, without dismounting the grinder from the arm completely,
 connect hydraulic hoses using push-in fittings while paying particular attention so that the
grinder’s supplying hose is connected to the supply connector P(+) of the extension arm and the
grinder’s return hose to return connector T(-) of the extension arm (Fig. 4),
 lift up the connected tree stump grinder slightly above the pallet and check all bolt connections
and whether there are no apparent damages.
 pre-start the tree stump grinder in order to check whether connections and operation are correct.
Fig. 4. Markings of hydraulic hoses on tree stump grinder
CAUTION:
When connecting and inspecting the tree stump grinder, follow any and all
safety conditions provided herein.

Operator’s manual
TREE STUMP GRINDER
FP 20
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5.2 Transport position and drives
Transport position of tree stump grinder aggregated with SaMASZ extension arm corresponds
to the arm's transport position. See Fig. 5.
When mounting the tree stump grinder on other type of extension arm, fold the tree stump
grinder aggregated with the arm in the position as compact as possible.
•To transport the aggregation of arm and grinder, use any protective means as intended for control
and design of the extension arm.
•Dismount the PTO shaft for transport. Provide proper marking and lighting of the aggregated
machines for a low-speed vehicle to comply with road traffic provisions.
•Driving speed should always be adjusted to current road conditions.
•Transport speed on public roads cannot exceed the mean speed of 25 km/h (15 mph).
Fig. 5. Tree stump grinder in transport position
5.3 Operation
5.3.1 Basic information about the operation
In order to ensure proper high-quality operation, as well as to maintain tree stump grinder's
durability follow these rules:
 respect work safety and traffic rules solely,
 keep hydraulic oil consumption for tree stump grinder’s supply pump at max. 70-100 l/min. For
SaMASZ extension arm such demand is achieved at tractor’s PTO shaft rpm of 700-1000 rpm,
 before operating, in order to ensure accurate arm control and grinder's non-overloading
condition, stop the tractor and engage its parking brake,
 it is advisable that before operating the operator sets the grinder so that its mounting plate is
horizontal, and the extension arm – so that the distance between the grinder and the tractor is
approx. 1.5 - 2.5 m, what should ensure good view on the grinder and accurate control over it,
 having set the grinder and the extension arm as provided in Fig. 6, start the grinder and lower it
slowly onto the tree stump height,
 the essence of operating the tree stump grinder is to move it so as to touch one side of the tree
stump with the rotation of the whole extension arm, and lower the grinder only after the entire
width of the tree stump is ground,
 to make the arm's control more accurate, adjust choke valves with knobs on cylinders.

Operator’s manual
TREE STUMP GRINDER
FP 20
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Fig. 6. Tree stump grinder with attached arm in working position
5.3.2 Initial adjustment and preparing for operation
Tree stump grinder is factory adjusted and requires no additional adjustments. If any signs of
improper operation of the grinder are found, please contact the Manufacturer's service.
Before operating the tree stump grinder do the following:
 thoroughly examine the tree stump grinder for operational condition, plays and damages. Pay
particular attention to condition of bolt connections on cutting knives,
 remove any guards, locks and safety devices mounted on the aggregation of extension arm and
tree stump grinder,
 connect the PTO shaft to the tractor,
 having made sure there is no unauthorized personnel around, start tree stump grinder with no
load and reach the pre-set PTO rpm rate, and then shut down and check for tightness,
 if the tree stump grinder's condition and its idle operation raise no doubts, start operating.
As an additional equipment or a spare part, knives can be ordered in two options:
 Red – knives with large hollow on blades for applications in non-sandy areas, where tree
grinding is problem-free,
 Green – knives with smaller hollow on blades for applications in sandy areas.
Fig. 7. Knife rotation to achieve sharp cutting edge

Operator’s manual
TREE STUMP GRINDER
FP 20
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5.3.3 Safe start up and shut down
Before operating make sure there are no unauthorized personnel or animals within the range
of 10 m. Next set the grinder in the mean working position and start it afterwards.
Before stopping tree stump grinder terminate grinding by lifting it up above the stump being
ground Then, turn off the machine’s drive so in result any manoeuvring actions with extension arm
can be started in order to set the aggregation of extension arm and tree stump grinder to transport
position.
5.3.4 Control
Tree stump grinder is controlled with the extension arm control panel.
5.3.5 Proceedings in case work unit is locked
 lower adaptor onto the ground,
 perform any works at the machine only with its drive turned off and no pressure present in the
hydraulics,
 remove the ignition key and secure the vehicle against uncontrolled movements or unintended
start up,
 wear protective gloves and remove the part which causes the machine's locking.
5.3.6 Dismounting machine from the extension arm
To dismount the machine from the extension arm:
 turn cutterbar’s drive off,
 drive the tractor with connected the extension arm and the tree stump grinder to the pallet. The
pallet must be placed on the equal and hardened ground,
 carefully put a tree stump grinder on a pallet,
 secure the tractor against its free runaway,
 turn the tractor's engine off and take ignition key off,
 disconnect a hydraulic hoses,
 disconnect tree stump grinder’s mounting plate from the extension arm’s mounting plate by
unscrewing,
 carefully drive away with the tractor.
6. MAINTENANCE AND SERVICE
CAUTION:
Use only genuine SaMASZ fittings and spare parts. Spare parts of unknown
origin or new made feature lower strength and have unfavourable influence on
machine’s overall performance and safety.
CAUTION:
The SaMASZ co. shall not bear any responsibility for damages and defects
caused as a result of applying non-genuine parts and fittings.
6.1 Daily maintenance
Each time before operating the tree stump grinder do the following:
 make sure that both the tractor and the extension arm, which the tree trump grinder is mounted
on, work properly,
 examine bolt connections of cutting disk, knife holders, knives and tighten if necessary,
 examine torque of all bolts and nuts,
 examine condition of hoses and hydraulic connections,
 examine condition of cutting knives, and if need be, turn by 1/3 turn, recover or replace,
 replace damaged parts.

Operator’s manual
TREE STUMP GRINDER
FP 20
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After 4-5 hours of operation:
•examine bolt connections, and connections on cutting disk, knife holders and knives, and if
need be tighten according to Błąd! Nie można odnaleźć źródła odwołania.,
•examine condition of rubber guard,
•examine condition of hoses and hydraulic connections,
•examine cutting knives for operating condition.
Once operation with the machine is complete, do as follows:
 examine bolt connections, and particularly these found on cutting disk, knives and if need be
tighten them,
 clean the machine thoroughly from any dirt and then wash and dry it.
In order to ensure a long-lasting high-quality cutting, the knives are mounted in knife holders
so that if knife-fixing nut is loosened and the knife is removed from the holder, it can be turned by
1/3 turn. This is to achieve 3 sharp cutting edges and 3 times longer knife's service life.
6.2 After-season maintenance and storing
After the tree stump grinder has been dismounted from the extension arm, for idle period
longer than one month, perform the following maintenance works:
 clean the tree stump grinder thoroughly from any soiling and then wash and dry,
 if need be, perform any repairs, adjustments, replacement of sealing or hoses,
 remove any sources of corrosion and complement any paintwork defects,
 protect non-painted metal surfaces with a thin film of a solid grease, e.g. ŁT – 43, or gearbox,
mineral or motor oil, e.g. 15W40,
 complement or replace illegible warning and information labels,
 close connection nozzles of hydraulic hoses.
Tree stump grinder should be stored in a standstill position in a dry and clean place,
inaccessible to unauthorised personnel and animals, on an even and paved ground under a roof or
any other cover protecting it from the weather.
6.3 Restarting the machine after repairs or longer storing periods
 Examine torque of all bolts and nuts (Tab. 2).
 Examine technical condition of hydraulic and drive assembly as on daily basis.
Tab. 2. Torque values for bolts

Operator’s manual
TREE STUMP GRINDER
FP 20
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7. MALFUNCTIONS AND THEIR REPAIR
Defect Reason Repair
Tree stump grinder is
not grinding
Damaged or blunt cutting knives
Turn the knife by 1/3 turn (special
relieves on the knives), handle for
recovery or replace
Too low PTO rpm Switch rpm to 1000 rpm, increase
engine
’
s rotary speed.
Worn, damaged hydraulic engine Recover hydraulic engine or replace
Damaged or torn bolts securing
hydraulic engine
Replace
Not tight hydraulics
Seal or tighten connectors
Improperly adjusted or damaged oil
distributor
Adjust or replace
Cutting disk rotating in opposite
direction
Swap connections
Not tight hydraulic assembly, broken or
torn hydraulic hoses
Remove any non-tightness, replace
hoses
Tree stump not evenly
ground
Damaged or blunt cutting knives Turn knives by 1/3 turn, handle for
recovery or replace
Jerky, non-accurate motions of
extension arm
Improperly adjusted choke valves on
extension arm's cylinders
Low rpm of cutting
disk
Improper tractor's PTO rpm engaged Switch tractor's PTO shaft rate to 1000
rpm
Low rpm
at tractor's PTO
Increase tractor's engine rotary speed
Worn hydraulic engine
Replace
Not tight hydraulics
Seal
Loud operation
Loose mounting bolts of hydraulic
engine or tree stump grinder ’ s mounting
plate
Tighten bolts
Significant vibrations
of the grinder and the
extension arm
Loose cutting knives or knife holders
Tighten bolts
Loosened bolt connections
Tighten bolts
Cutting knife or knife holder missing
Mount cutting knife or knife holder
Oil leak
Improperly bolted connecting nozzles Bolt connecting nozzles
Worn, damaged sealants, fittings
Replace sealants, fittings
Not tight hydraulic cylinder
Recover
Replace

Operator’s manual
TREE STUMP GRINDER
FP 20
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8. DISMOUNTING AND WITHDRAWAL FROM USE
8.1 Repair
When partial wear of the tree stump grinder is found, repair it by replacing any worn parts.
Thus, clean the machine from any dirt and chips. Then drain the oil into a tight tank and close
connecting nozzles. Next replace all worn parts and assemble the grinder back with new connecting,
protective and sealing parts. Bolts should be tightened with torque corresponding to their resistance
classes.
Store damaged or worn parts in a restricted area and then deliver them to a scrap yard.
CAUTION:
Before disassembly the tree stump grinder should be disconnected from the
tractor.
Once the machine is repaired perform the following:
 Make sure that all elements are installed properly,
 Check that all screws and nuts are tightened,
 Once all the guards are installed, perform a warm-up start to make sure the repaired machine
operates properly.
8.2 Disassembly and scrapping
Pay particular attention when mounting and dismounting and use drawings provided in the
spare parts catalogue.
If the tree stump grinder cannot be repaired any more, it should be withdrawn from use. Thus,
clean the machine from any dirt and chips. First, drain oil from the hydraulics and dispose of
properly. Then disassemble the whole tree stump grinder and remember to segregate parts
according to the kind of material used and deliver them to a scrap yard.
8.3 Environment
 Tree stump grinder is a fully natural environment-friendly product.
 90% of the materials used in the grinder are recyclable.
 Materials used for packaging are 100% recyclable.
 Worn machine parts and packaging should be disposed of in accordance with local natural
environment protection regulations.
 During the whole operation period, pay attention to prevent any oil leak from hydraulics of the
grinder, which may cause environmental pollution.