Laski FZ 500/27 User manual

OPERATING INSTRUCTIONS
SUSPENSION STUMP CUTTER FZ 500/27
FZ 500/38
FZ 500 H
Version 03.2020

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Foreword
Thank you very much that you have just purchased our product, the suspension stump cutter
FZ 500. Our company has been engaged in production of equipment for stump cutting, wood
residue crushing and disposal for many years and has gained considerable experiences in this
field. Quality of our small and also powerful machines is proven in 40 countries of Europe and
Asia we export to.
Permanent innovations of the Laski manufacturing assortment have been crowned by the
most important awards in the company’s history, the golden medals Grand Prix, gained for its
complete family of products at the international shows Techagro und Silva Regina in Brno:
Grand Prix Techagro 1998
Grand Prix Silva Regina 2002
Grand Prix Silva Regina 2008
This manual brings important instructions for users, i.e. instructions for putting the machine
into operation, work safety and operating experiences. You will learn how to carry out
maintenance, repairs and servicing and who is authorised for doing checks and other actions
on the machine.
Your local dealer will give you this manual with instructions for operation and maintenance
while taking this new machine over. Make sure if you understand everything. If not, do not
hesitate and contact your dealer and ask him for further explanation. It is very important for
you and your work safety to understand all instructions given in this manual.
The firm Laski, s.r.o. does not bear any responsibility for any claims resulting from
disobedience to the instructions given in this manual.
This operation manual includes also work safety instructions in various parts of its text. If there
is any work safety rule or instruction in general description, then this instruction is indicated
with the following symbol:

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EC CONFORMITY DECLARATION

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5

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Obsah
F o r e w o r d ........................................... 2
E C C O N F O R M I T Y D E C L A R A T I O N .................. 3
O b s a h ............................................... 8
P r o d u c t I d e n t i f i c a t i o n .............................10
W o r k S a f e t y I n s t r u c t i o n s .........................11
U t i l i s a t i o n ........................................11
N o t A l l o w e d U s e ...............................11
G e n e r a l l y .........................................11
W o r k S a f e t y S y m b o l s ..........................13
T r a n s p o r t o f P r o d u c t ...........................16
P r o d u c t H a n d l i n g u p o n D e l i v e r y ............17
P r e c a u t i o n s .......................................17
C o n t r o l s ...........................................18
U s e ......................................................18
T r a n s p o r t , H a n d l i n g a n d S t o r a g e ...........18
B e f o r e O p e r a t i o n ................................20
C o u p l i n g / u n c o u p l i n g ...........................21
C h e c k s b e f o r e S t a r t ............................22
P u t t i n g i n t o O p e r a t i o n .........................24
P u t t i n g o u t o f O p e r a t i o n ......................24
E m e r g e n c y S i t u a t i o n s ..........................25
N o i s e a n d V i b r a t i o n s ...............................26
T e c h n i c a l D e s c r i p t i o n ............................. 27

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T e c h n i c a l P a r a m e t e r s ..............................28
M o d i f i c a t i o n w i t h h y d r o m o t o r .....................29
T e c h n i c a l p a r a m e t e r s o f t h e h y d r o m o t o r : . 29
D i a g r a m o f t h e h y d r a u l i c c i r c u i t F Z 5 0 0 H 30
M a i n t e n a n c e .......................................... 31
B l a d e s C h a n g e ...................................33
T r o u b l e s h o o t i n g ................................. 34
W a s t e D i s p o s a l ..................................34
W a r r a n t y ...............................................34

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Product Identification
Our product is identified with its serial number stamped both on the type plate and on the
chassis. Further on the combustion engine installed on our machine is identified with its
separate type plate.
Upon take-over of the product we recommend you to fill required data in the following form
concerning the given product and your dealer.
Type of product: ……………………………………………
Serial number of product: ……………………………………………
Engine type: ……………………………………………
Serial number of engine: ……………………………………………
Dealer's address: ……………………………………………
Address of authorised service: …………………………………………...
Date of delivery: ……………………………………………
Warranty expiration date: ……………………………………………
Interruption of warranty period: ……………………………………………
The product type plate is located on the chassis edge and includes:
-manufacturer's address
-type
-serial number
-engine type
-weight of machine
-CE identification symbol
The engine
type plate is situated
aside on the engine fan
cover.

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Work Safety Instructions
Utilisation
This suspension cutter is designed for suspension on a hydraulic jib of building machines with
relevant fixing devices and for cutting a stump with its above-ground part and its under-ground
part in a max. depth of 20 cm under the ground level. While working the cutter must be in a
vertical position or in an angle of +/-30oto its vertical axle.
Not Allowed Use
This machine cannot be used for cutting of dozy stumps which could be released and pulled
out by the blades. Avoid any cutting if there can be stones, metallic and glass objects etc.
hidden in the stump.
It is not allowed to use the cutter for cross-cutting, felling, cutting branch wood off etc.
It is also not allowed to use the cutter if the operator of a building machine have no view to the
cutting blades.
Generally
-This machine can be operated only by an operator that is over 18 yrs old, physically and
mentally capable and demonstrably instructed with its operation.
-Keep this machine beyond children's and unauthorised person's reach. Avoid their
attendance while cutting.
-The operator of this machine is fully responsible for any injury or damage caused to the
third persons within the operating reach of the machine.
-Before working learn all functions of individual controls. If necessary, contact your dealer
and ask him for operator's training.
-Operation of the hydraulic jib, especially its motional continuousness and co-ordination,
requires considerable experiences.
-At work in residential zones use the machine in accordance with regulations of the local
authorities to avoid disturbing of local inhabitants.
-The operator is obliged:
- to use only a such building machine which is in optimal operating condition,
without excessive jib clearances
- to use only a such building machine which is provided with a cab with
undamaged windows for his protection against operating noise
- to use only an original fixing device, designed for such purpose and supplied
by the manufacturer. This fixing device must be properly bolted to the jib. It
is necessary to check bolted joints regularly after longer operation.
- for remote control of the cutter to use only a such equipment which is
provided with ON/OFF and CENTRAL STOP controls
- to install functional controls on the jib so that their damage may be excluded

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(especially squeezing hazards at jib motion)
- having started the cutter the operator is not allowed to leave his cab of
a building machine and he should be permanently watching the cutting
operation
- the operator should avoid any activity which could bring hazards for himself
and other persons
- while handling the cutter, especially after its start, avoid its contact with
the building machine. The jib radius with the cutter is extended!!!
- having finished the cutting work put the cutter in its supporting frame to
ensure its stability and to avoid contact of blades with base
- to fix the cutter in its supporting frame properly
- to respect all work safety instructions for the given building machine
-It is not allowed to use the cutter, attached to the hydraulic jib, in any other way than to
purposes given by the manufacturer.
-This manual describes also some common troubles and failures which could occur and
which are easy to be remedied by an instructed person. Other problems and faults
should be announced directly to the manufacturer who is always ready to help you.
-It is not allowed to do any technical changes or any actions which are neither given in
this manual nor allowed by the manufacturer. The machine, not correctly installed or
adjusted, may run without problems now but in the future it could bring damage any of
important parts.
-Do not put any objects or tools on the machine.
-The manufacturer does not bear responsibility for any damages or injures to the third
persons or to other equipment resulted from disobedience to instructions given in this
manual.
-When turning off the machine keep its remote control box separately to avoid starting by
no unauthorised persons.
-When handing the machine over to another person make sure if all controls, guards and
other safety elements are complete.
-Do not remove guards and other safety elements. They serve for your safety.
-Keep the given intervals for checks of bolted joints.
-Always after work clean all parts of the machine with pressure water.
-Any servicing can be done only if the machine was put out of operation, the remote
control was off and its battery was disconnected.
-Avoid any random start - disconnect the plus pole of the battery.
-Keep all parts clean, especially cooling ducts of the engine and parts related to the fuel
tank.
-Fill up the fuel tank before working and only if the machine is turned off.
-Do not fill the fuel tank while the engine is hot or still running.
-Do not start if some fuel has been spilled.
-Do not use petrol as a cleaning agent.
-Keep open fire away while filling the tank.
-Keep the machine beyond reach of open fire.
-Any transport of persons or of any load on the machine is not allowed.

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-Some parts of the machine can be extremely hot while in operation. To avoid any burn
risks do not touch these parts when the engine is still running or when having just
stopped the engine.
-Do not touch live wires while the machine is still in use.
-Do not let the engine running in high speed unreasonably.
-Do not change the engine adjustment, especially its regulator.
-Be careful at battery handling.
-Warning! The battery contains sulphuric acid that could cause burns.
-Do not use the machine under conditions of low visibility.
-Do not use the machine without prior reading this manual. If you have no experiences
with such type of machines and if you are not sure with its operation, ask your dealer and
he will show you its practical use.
-Do not carry out any repairs that are specified for authorised services only.
-Do not carry out any repair where its solution exceeds your experiences.
Work Safety Symbols
This article introduces work safety symbols (pictographs) used on the machine. Under a figure
there is its position on the machine. These work safety symbols warn the operator against
risks connected with the machine use. Your respect to the symbol meaning is a precondition
for your work safety.
The user is obliged to keep all the work safety symbols legible, clear and undamaged. In case
of any damage or illegibility ask your local dealer or an authorised service for a new relevant
pictograph.
1
2
3
4

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Read this
operating manual
before use.
Always follow the
manual while
maintaining, servicing or
repairing the machine
and take the switch key
out of ignition.
Warning! Electric
current is present
on the machine.
Before putting out of
operation fix the
cutter in the
supporting frame.
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6
7
8
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Start the machine
with the switch key
only. Do not short
circuit the
contacts.
Warning! Fuel is
flammable! Keep
open fire away!
Warning! Hot parts
of the exhaust
manifold.
Warning! Rotating
part. Hit and pull-in
hazard.
Lashing points.

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10
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Warning! Lower
extremities injury
hazard.
Warning! The
cutting head is
running out.
Warning! Rejected
objects hazard. Keep
away.
Warning! Close all
guards before
starting the machine.

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Transport of Product
-This product is delivered completely mounted, fixed in a supporting frame and attached
to a wooden pallet. The supporting frame is usually bolted or fixed with a binding band to
the pallet. While handling you may use a lift truck or a crane (suspension in the given
lashing points only).
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-The manufacturer delivers the machine shrink-wrapped. The protective foil protects the
machine against weather effects but in no case against mechanical damage, fall etc. The
protective foil is recyclable, dispose it according to valid local regulations.
-While putting the machine aside (e.g. at reloading) we recommend to place it under a
shelter.
-While unloading put the product always on a flat and firm bottom.
-It is not allowed to put it on a labile base.
-It is not allowed to put any objects or tools on the machine.
Upon delivery unload the cutter from the pallet together with its supporting frame.
This supporting frame is an integral part of the machine during its whole service
live. While putting the cutter aside the supporting frame provides its stability.
Having put the machine in the frame lock it with bolts and nuts.

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Product Handling upon Delivery
Upon delivery unload the machine from the transport pallet as follows:
-Put the pallet aside on a flat and firm surface.
-Remove transport protective wrapping.
-Cut the binding band carefully or loosen the fixing bolts. Be careful, the band is tightened
up and after cutting its both ends may shot out. While cutting use protective gloves.
-Lift up the cutter with lifting means. If a building machine is ready attach the cutter and
lock the joints. Before installation check its clamping head tightening.
-Lift up the cutter in order to remove the transport pallet.
-Leave the cutter being fixed in the supporting frame.
Precautions
This machine is provided with safety guards protecting against any contact with rotating parts
(hit and pull-in hazard) and against hot parts (exhaust manifold). The guards are fixed, bolted
down and solid, only the guard over the exhaust manifold is perforated.
This machine can be operated by means of a remote control box only, i.e. START/STOP and
EMERGENCY STOP controls.

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CAUTION!!! Having turned the engine off the cutting head is freely running out. Any head
braking is strictly forbidden.
Controls
The stump cutter can be operated by means of controls on the remote control box and aside
on the engine.
Auxiliary view of engine controls
Remote control box
1 - choke
2 - engine speed regulator
Use
Transport, Handling and Storage
Any activity introduced in this part means transport, handling and storage of the cutter
together with its supporting frame.
Lifting and lowering
-For lifting or lowering use only the given lashing points (marked with chain symbols).
Suspension in other points may bring damage of parts and instability at lifting.
-Fix the wire line thimbles on suspension pins.
-If no suspension is available, screw lash eyes into tapped holes.
-At lifting keep away from the place under the crane load.
-For loading or unloading use lifting means with min. carrying capacity of 300 kg.The
cutter can be attached to a building machine directly from transportation means, if it is
1
2

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possible thanks to technical parameters of a building machine. In this case the
supporting frame may remain fixed on the pallet.
-The cutter must be transported always being fixed in the supporting frame.
-After loading fix the supporting frame properly on the loading surface. For fixing use lash
eyes for such purpose welded on the frame. Its fixed position must be sufficiently stabile
against any unwilling motion.
-It is strictly forbidden to handle the cutter with its engine and cutting head running.
-Store the machine only in spaces protected against water
-During storage keep the remote control box separately.
-Before storage clean all parts of the machine. Use pressure water for cleaning.
-Clean especially oily spots.
-Exchange all damaged or worn parts. Use always original spare parts. For spare parts
contact your dealer or authorised services.
-Before putting machine aside for a longer time change the engine oil and the filter
element. The filter body is located aside of the engine. Under the filter body there is the
oil discharge hole. For easy oil discharge use a hose about 15 cm long.
-Discharge the used oil into a special bin. Dispose the used filter element always in
accordance with relevant valid laws and local regulations.
-Remove any spilled oil and clean all oily spots.
-Always put the machine aside on a flat and solid floor.
-For easy further handling put the cutter on a wooden pallet (use of a fork lift truck).
-In case of a wooden pallet do not forget to fix the supporting frame properly with bolts or
binding bands.
-Do not put any objects or tools on the machine.
-Store the fuel canisters separately. Keep them away from the machine.
Oil filter
Oil discharge hole
Dipstick
Oil-filling hole

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Before Operation
-Before the first putting into operation check up the machine for contingent damages and
completeness after transport and storage.
-Check wrapping for contingent oily spots. In such case check oil charges.
-Check the engine oil level with a dipstick and refill if necessary. The oil level must be
between both marks (MIN and MAX).
-In case of any damage contact your dealer or authorised service.
-For replacement use always original spare parts only.
-While refilling avoid spilling oil or fuel. If spilled, wipe all oily spots immediately. After
petrol spilling wait for its evaporation.
-Check tightening of bolted joints, especially rotating parts and completeness of other
parts.
-Fill the given fuel into the tank, min. volume of 4 litres. The tank has its max. capacity of
18 litres.
-The fuel to be used is unleaded petrol NATURAL 95.
-Put and fix the battery.
-Connect its minus pole. Connect the plus pole just before starting.