Laski VD 500 User manual

OPERATING INSTRUCTIONS
LEAVES EXHAUSTER
VD 500
Version 03. 2020

2
Foreword
Thank you very much that you have just purchased our product, the leaves
exhauster VD 500 (hereinafter 'exhauster' only).
Our company has been engaged in production of similar equipment for many years
and has gained considerable experiences in this field. Quality of our machines is
proven in 40 countries of Europe and Asia we export to.
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
explanation. It is very important for you and your work safety to understand all
instructions given in this manual.
The firm Laski spol. 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 the
text. If there is any work safety rule or instruction in general description, then this
instruction is indicated with the following symbol:

3
FOREWORD ...........................................................................................................2
PRODUCT IDENTIFICATION...........................................................................6
UTILISATION .........................................................................................................7
TRANSPORT OF PRODUCT/HANDLING .................................................................11
TRANSPORT SAFETY ON PUBLIC ROADS.................................................13
Transport Position..........................................................................................14
Trailer coupling/uncoupling...........................................................................14
Putting aside and parking ..............................................................................15
Trailer loading ...............................................................................................15
TRAILER CHECKS BEFORE RIDE.............................................................................16
STORAGE.............................................................................................................17
BEFORE PUTTING INTO OPERATION ....................................................................18
BEFORE PUTTING INTO OPERATION........................................................19
PUTTING OUT OF OPERATION ..............................................................................21
NOISE AND VIBRATIONS................................................................................23
RESIDUAL RISKS .................................................................................................23
TECHNICAL DESCRIPTION...........................................................................24
Suction Line....................................................................................................24
Driving Engine...............................................................................................25
Suction Fan ....................................................................................................25
CHASSIS ..............................................................................................................25
TECHNICAL PARAMETERS...........................................................................26
MAINTENANCE....................................................................................................27
TRAILER MAINTENANCE:.......................................................................................28
Hot-dip galvanized parts:...............................................................................29
V-belt tension..................................................................................................30
Maintenance Intervals....................................................................................33
FAILURES AND TROUBLESHOOTING ....................................................................34
WARRANTY.........................................................................................................35
SERVICE REPORT ............................................................................................37

4

5

6
Product Identification
Our product is identified with its serial number stamped on the type plate. Pay your
attention also to the type plate on the combustion engine.
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 type plate is located on the machine frame. It includes:
- manufacturer's data
- type
- serial number
- year of manufacture
- weight of machine
- product designation
VIN code

7
Utilisation
The leaves exhauster is designed for collecting of leaves or short-cut (mowed)
grasses in places where gathered after upkeep and cleaning of parks and green
areas.
Not Allowed Use
This exhauster is designed only for collecting of aforesaid materials and not
allowed for evacuation of metal particles, woody pieces, wood dust, sand, grit,
broken glass, textiles etc.
Work Safety Instructions
Generally
-This machine is allowed to be operated only by an operator who is over 18 yrs
old, physically and mentally capable and demonstrably instructed with its
operation.
-A towing vehicle driver should have respective driver's license.
-Keep this machine beyond children's and unauthorised person's reach.
-When leaving the machine take always the switch key out of ignition.
-Every 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 and safety elements
and carry out functional checks before any use. Ask your dealer to provide you
a necessary training course.
-At work in residential zones use the machine in accordance with applicable
regulations of local authorities to avoid disturbing local inhabitants (noise,
flying particles).
Is strictly off limits test run of the exhauster puting near the suction hole
to parts of the human bodies , stoking limbs to the suction-fan , also to the flow of
air.
While working the operator is obliged:
oto use only a such exhauster which is in optimal operating condition, not
damaged from previous transport, storage and operation and
oto use only such a transport vehicle which has closed loading space so that
collected leaves cannot be blown away.
oIt is not allowed to let any person enter the loading space while working.
oWhile working observe all the given instructions concerning work safety,
motion of persons and transport means.

8
oBefore transport put the suction hose in its holders around the machine to
avoid its overhanging in side face. Keep the given traffic rules and instructions
for vehicle outlines and lights.
oBefore transport fix the discharge duct hose against motion.
oCouple the exhauster to a towing vehicle properly and check its proper
coupling.
oPlug and check traffic lights of the exhauster.
oKeep the chassis always in good technical condition.
oDo not endanger other people within the reach of the machine.
oCheck materials to be sucked and remove all undesirable objects. If you see
such particles being rejected, stop working immediately.
oKeep work safety instructions given in manuals of transport means.
-This manual describes problems and faults which could occur at work and
which may be remedied by an instructed person. In case of other problems and
faults do not hesitate and contact the manufacturer. He is always ready to help
you.
-Never do any technical changes or 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 damage
any of important parts.
-Do not put any objects or tools on the machine.
-Do not use the exhauster for transport of persons or things.
-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 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.
-Some parts of the machine can be hot while in operation. Avoid any settling of
flammable leaves and similar materials on such parts or close to engine intake
openings, fuel tank and exhaust manifold. Stop working if such dangerous
deposits occur.
-Any servicing can be done only if the machine was put out of operation and its
battery was disconnected.
-Avoid any random start - disconnect the plus pole of the battery.

9
-Fill up the fuel tank before working and only if the machine is turned off. To
fill up the fuel tank use always a proper filling funnel with extension.
-Do not fill the fuel tank while the engine is hot or still running.
-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 any load on the machine is not allowed.
-Some parts of the machine run warm. Do not touch them when the engine is
still running or having been just stopped.
-While the engine is running, do not touch its high-voltage cable.
-Do not let the engine running in high speed unreasonably.
-Do not change the engine adjustment, especially its speed regulator.
-Be careful at battery handling.
-Warning! The battery contains sulphuric acid that could cause burns.
-The battery should be always properly fixed in its place.
-Do not start the machine in confined or ill-ventilated spaces.
-Do not use the machine under conditions of low visibility, especially at foggy
weather, when you may overlook unwanted persons coming.
-Do not use the machine without prior reading this manual.
-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.
-It is strictly forbidden to work with a damaged fan wheel (vibrations while
running), a damaged suction hose or without sucker.
-Check up bolted joints for tightening after the first 50 km.
-For leavex exhauster without being coupled to a towing vehicle, first set the
trailer in a horizontal position (relatively levelled) by means of its jockey
wheel and block both travelling wheels by scotch blocks against unwished
motion or, in case of a braked trailer, use its parking brake.
-Before transport, after coupling, lift up the jockey wheel under the drawbar at
least approximately 20 cm above the ground to avoid any contact with terrain
(road).

10
Work Safety Symbols
This article introduces work safety symbols (pictographs) used on this machine.
Under the given position number there is their location on the machine. These
work safety symbols warn the operator against risks connected with the machine
use. Your respect to the symbol meanings 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

11
Read this
operating manual
before use.
While maintaining,
servicing or
repairing always
follow the manual
and take always
the switch key out
of ignition.
Warning! Electric
voltage
Start the machine
with the switch key
only. Do not short
circuit its contacts.
5
6
7
8
9
Warning! Fuel is
flammable! Keep
open fire away!
Warning! Hot parts
of exhaust
manifold.
Warning! Turning
wheel is running
out.
Warning! Rejected
objects hazard.
Keep away.
Warning! Close all
guards before
starting the
machine
Transport of Product/Handling
-This product is delivered completely mounted and fitted on its chassis. The
exhauster can be towed by towing means which, according to its total weight,
even a car can be.
-Any handling the exhauster is supposed at coupling/uncoupling to/from a
towing vehicle only.
-It is forbidden to tow the machine to another place by hand (with exception for
coupling to a towing vehicle).
-Any exhauster displacement by hand only is not allowed.
-Putting the exhauster aside block it against unwilling motion by means of
scotch blocks. On flat surface block one wheel from both sides.

12
-Uncouple the exhauster always on compact, flat and sufficiently bearing
surface only.
-It is not allowed to put any objects or tools on the machine. Never pile
exhausters up on each other.
Keep the towing bracket ball or the drawbar eye clean (free of sand
etc.); apply a corresponding grease film on their surface. While putting
the trailer aside, use the jockey wheel for supporting. Lock it by
tightening,
Precautions in Design
This product is equipped with hoods, guards and covers to protect rotary and hot
parts against touching. Protective covers and guards are usually fixed or bolted
down on framing. The guard over the exhaust manifold is perforated and protects
the attendant against contingent burning.

13
The fan wheel space is protected against access by a hinged cover with a terminal
switch.
CAUTION!! If the engine is turned off, the fan wheel runs freely out. Do not open
the spiral casing of the fan wheel until it stops.
Controls
The leaves exhauster can be controlled by means of controls installed on the engine
console.
Controls on engine
1 - Ignition box
2 - Choke
3 - Speed regulator
Transport Safety on Public Roads
For transport on public roads the trailer should be coupled to transport means
equipped with towing brackets approved accordingly. The given towing vehicle
should be also approved for this way of transport and equipped with a respective
towing bracket intended for permissible weight of an unbraked trailer and for
vertical coupling load of 50 kg at least. If the towing vehicle is equipped with a 13-
pin receptacle for transport lighting, it is necessary to use an applicable adapter.
To be ready for transport on public roads the trailer must comply with the
concerned instructions in its operating manual and the machine engine must be
turned off.
Maximum transport/travel speed is 80 km.h-1.

14
Always before coming to a public road it is necessary to remove all mud and
accumulated sediments, especially from trailer tires.
Transport Position
First make the machine ready for transport:
turn the engine off;
couple the trailer on the towing bracket ball, or
insert the drawbar in the hitch and lock it with a locking pin;
connect the brake safety rope to the towing vehicle;
put the scotch blocks in their holders;
lift up the jockey wheel under the drawbar;
set the discharge duct forwards and lock it against turning;
fold down the end piece and lock it mechanically against moving;
connect the electric plug to the towing vehicle.
Trailer coupling/uncoupling
For transport this chipper can be coupled to transport means equipped with a
respective towing coupler B50-X (with a ball ISO, ø 50 mm) or through a drawbar
eye ø 40 mm in the towing vehicle hitch. The given vehicle should be approved for
transport on public roads.
put the scotch blocks under the unbraked trailer wheels.
While coupling, go always with the towing vehicle to the trailer. Be careful,
this approaching could be dangerous, particularly on hilly terrain.
First of all, set the drawbar in required height by means of its jockey wheel.
Coupling through a ball coupler:
Hold the coupler on its grip and put it on the ball in rear of the towing vehicle.
After snapping on the ball release the grip and the coupler gets automatically
locked. The pointer on the ball coupler Knott must be within the „+“ range. In
case of the AL-KO ball coupler you should see the pointer in a green field.
Try to lift it up by hand to check out if the ball coupler is properly locked.
Coupling through a drawbar eye, 40 mm: :
Having approached the towing vehicle to the drawbar and after its height
adjustment by means of the jockey wheel put the eye into the hitch.
Automatic couplers lock the drawbar inside by a pin automatically.
In case of manual couplers put the eye into the hitch and insert its locking
pin. After snapping lock the pin by its locking spring or dowel against
unwilling uncoupling.
Check out proper coupling and locking of the trailer drawbar.

15
For a braked variant: connect the brake safety rope to the buffer, frame or
towing bracket in rear of the towing vehicle. This rope of the overrun brake system
should be led directly to the towing vehicle and freely for all reciprocal movements
both of the trailer and the vehicle.
If the towing vehicle is equipped with a 13-pin receptacle for transport
lighting, it is possible to use an applicable adapter for a 7-pin plug. The
trailer can be also equipped with a 13-pin plug (option).
While uncoupling the trailer, proceed in reverse order. Do not uncouple the trailer
on a hillside as it is very dangerous. Before uncoupling, make sure if the trailer is
sufficiently blocked against unwilling motion after uncoupling from the vehicle.
Putting aside and parking
Unbraked trailer
Do not uncouple the trailer on a hillside as it is very dangerous. Before uncoupling,
make sure if the trailer is sufficiently blocked against unwilling motion with both
wheels properly chocked and then you can uncouple the towing vehicle. Extrude
the jockey wheel, let it rest on the ground and lock it in its extruded position
mechanically. Should the trailer be uncoupled from a towing vehicle, first unload
the towing bracket by lowering of the jockey wheel as needed.
While putting aside or parking the trailer being coupled to the towing vehicle,
retract the parking brake on the vehicle and, on hilly terrain, block it against
unwilling motion with scotch blocks under both trailer wheels and at least under
one wheel of the towing vehicle.
CAUTION! Before removal of the scotch blocks, first find out if the
parking brake of the towing vehicle can hold the whole set or the trailer
on uneven or rough ground also after this removal.
While putting the trailer aside for a longer brake or storage, for example in winter
time, block the trailer against unwilling motion, underlay it so that its wheels are
supported without load. In this way you can save tires, bearings and springs
considerably.
Trailer loading
While loading on a transport vehicle, the trailer must be properly fixed on the
loading surface, lashed and secured against any displacement or overturning.
This trailer is not designed for handling by crane, i.e. it has no lashing points.

16
While loading on a transport vehicle, no persons are allowed to be under the
trailer or in its close vicinity –risk of accidents.
.
Trailer checks before ride
The driver is obliged to carry out the following checks, in particular:
wheels fixing
condition of tires, tire pressure
condition and functions of lights and reflector glasses
trailer coupling, condition of towing bracket/hitch, drawbar eye and its locking
fixing of machine parts on chassis (in their transport position)
if there are no loose parts or tools laid on the trailer
if the trailer is set in its transport position, i.e. engine off and concerned parts
fixed
if the jockey wheel is sufficiently lifted up and locked mechanically;
if the trailer is free from mud and dirt

17
Machine ready for transport
Set the discharge duct forwards
Put the suction hose in holders
and secure it with a clip
Put the hose nozzle in its holder
and secure it with a cotter pin
Before starting the battery should be fully charged.
Remove the battery and let have it recharged by an authorised person.
While handling, take care of work safety regulations since the battery contains
caustic agent (battery acid). Do not tilt resp. overturn the battery. Do not remove its
plugs unreasonably.
Recharge the battery always after a longer operational break exceeding 50 days.
Be aware that any start failed and restarting brings loss of battery voltage.
Such a drop of potential might be insufficient for the next start.
Storage
Store the exhauster always in a dry shelter to protect it against weather effects.
-During storage keep the switch key separately.
-Keep the stored machine beyond unauthorised persons reach.
-Before storage clean all parts of the machine. For cleaning use pressure water.
-Clean especially oily spots.
-Exchange all damaged or worn parts. Use always original spare parts. For
spare parts contact your dealer or authorised services.
-While putting the trailer aside for a longer brake or storage, we recommend
changing the oil filter element together with the engine oil change. The given
filter body is on the engine side. Under the filter body there is a drain hole for
engine oil discharge.

18
-Discharge the used oil into a special bin. Dispose used oil and used filters
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 and block its wheels
against unwilling motion by means of scotch blocks.
-Do not put any objects or tools on the machine.
-Store the fuel canisters separately.
-Set the trailer in a horizontal position (relatively levelled) by means of its
jockey wheel.
Lock the jockey wheel mechanically.
Dipstick
Air filter
Fuel tank
Oil filling hole
Fuel filter
Before Putting into Operation
-Before the first putting into operation, check up the machine for contingent
damages and completeness after its transport and storage.
Attach the suction hose only at standstill of the engine with the spark
plug cable removed and the battery disconnected to avoid any random
start-up.
It is strictly forbidden to start the engine if the suction hose is not
properly coupled to the metal flange on the suction hole.
Minimum permissible length of the suction hose is 3 m.
It is strictly forbidden to test the suction draw or air flow by extremities.
Keep the suction hose away from your body, other persons or animals.

19
Check the engine oil level with a dipstick and refill if necessary. The oil level
should be between both marks (MIN and MAX).
-Check the suction hose for tightness –any untightness reduces suction
performance essentially (wear, damage).
-For putting the suction hose on its adapters use always binding bands.
-In case of any damage on the exhauster contact your dealer or authorised
service.
-For replacement use always original spare parts. Parts, such as rotors, should
be balanced properly.
-Avoid spillage at filling oil or fuel. Use always a proper filling funnel. If any
fuel or oil is spilled or overflowed then wipe off the spots immediately. In case
of petrol let it evaporate.
-Check tightening of bolted joints, especially guards, grids and completeness of
other parts.
-Check movability of rotary parts.
-Max. capacity of the fuel tank is 16 l. Minimal fuel charge is 5 l.
-The fuel to be used is unleaded petrol NATURAL 95.
-After storage check the battery. Recharge it if necessary.
-Plus and minus poles should be connected just before starting.
-It is strictly forbidden to do any unauthorised technical changes on the
machine.
Before Putting into Operation
-Before putting into operation, check up the machine for contingent damages
and completeness.
-Check up tightening of bolted joints.
-Check up permissible slack of V-belts.
-It is strictly forbidden to start the machine with its hoods and guards removed.
-Do not start the machine with oily spots.
-Any servicing or adjustment is allowed to be done only if the engine was put
out of operation.
-Check up the air filter element regularly, especially while working with dusty
leaves. If fouled, change it.
-Before working, check up on-site conditions: leaves to be sucked must be free
of any unwished objects, such as stones, metal pieces etc.
-Check up tightening of fixing bolts on the fan spiral casing.
-Direct the hose into the loading area of a transport vehicle and fix it properly.
-Connect the battery (plus pole).

20
-Any servicing can be done only if the machine was put out of operation and its
chassis blocked against unwilling motion. In case of a braked trailer, use its
parking brake or chock both travelling wheels. Do not step on the chassis
frame!
-
It is strictly forbidden to test the suction draw or air flow by
extremities. Keep the suction hose away from your body, other
persons or animals.
Putting into Operation
Before start check if the suction hose is free of any materials. Prevent
other persons to enter the working area. At work proceed always very
carefully.
Avoid collecting of any hard objects that might damage the moving rotor.
-Avoid directing the discharge duct to the area of possible motion of other
persons.
-Pay special attention to children if they are within the machine reach.
-Release the suction hose and put it in front of leaves to be sucked.
-Fix the suction hose to the framing.
-Open the choke (cold start).
-Set the speed regulator (throttle valve) to minimum speed.
-Open the fuel cock.
-Start the engine with its ignition key.
-CAUTION!!!
-As soon as the engine roars to life, the vane wheel starts turning and the
exhauster starts sucking –risk of ejected particles.
-Should the exhauster work in workshops or outdoors, avoid directing the
flying leaves/particles in places with motion of persons or animals after
starting. Before start-up tilt the end piece to reduce the flying particles
range. Be careful while working in workshops –danger of suction of
mechanical impurities and debris.
-They may have substantial kinetic energy.
-Having started raise the speed gradually by means of the speed regulator and
close the choke.
-If you heard any strange noises or vibrations during initial run turn off the
exhauster immediately and contact the authorised service.