Stiga TRE586V Instruction manual

Rel. 0.0
WORKSHOP MANUAL
PRODUCTION YEAR
TRE 586V - TRE586VA
TRE635V
TRE 586V - TRE586VA
TRE635V
2020 -->
The manufacturer reserves the right to make all the necessary technical or commercial improvements to
its products, so there may be some differences between the series of engines and the contents of this
manual. However the basic specifications and different operating procedures will remain the same.
by STIGA - No use of the illustrations or duplication, reproduction or translation, even partial, of the texts
in this document may be made without explicit authorization.
IMPORTANT NOTICE : The information contained herein is intended for Service Operations and professionals
only, able to competently perform the operations described herein, using the appropriate equipment in
order to safeguard se-curity and performance of the machine. The manufacturer is not liable for damages
or injuries arising from operations performed by individuals or inadequate facilities.
WORKSHOP MANUAL


Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
pag. 3
Service manual
INTRODUCTION..................................................................................................... 5
1. RULES AND PROCEDURES FOR SERVICE CENTRES .......................................... 6
1.1. Guarantee validity...................................................................................................................................6
1.2. Service repairs after guarantee period..................................................................................................6
1.3. Faultnotication.......................................................................................................................................6
1.4. Spare parts request..................................................................................................................................6
2. GENERAL AND SAFETY REGULATIONS............................................................. 7
2.1. Qualicationofoperators .......................................................................................................................7
2.2. Safety measures.......................................................................................................................................7
2.3. Precautions during servicing...................................................................................................................7
2.4. Warning labels..........................................................................................................................................8
2.5. Necessary equipment.............................................................................................................................8
2.6. Symbols and terms used for safety purposes........................................................................................8
3. TECHNICAL DATA AND SPECIFICATIONS........................................................ 9
3.1. Identication.............................................................................................................................................9
3.2. Technical data .........................................................................................................................................9
3.3. Adjustments..............................................................................................................................................9
3.4. Expendable materials..............................................................................................................................9
3.5. Use limits....................................................................................................................................................9
3.6. Tightening torques..................................................................................................................................10
3.7. Table of Tightening torques...................................................................................................................11
3.8. Identicationofengineunits.................................................................................................................12
4. ENGINE TUNING AND TESTING ...................................................................... 13
4.1. Operating guidelines.............................................................................................................................13
4.2. Changing the engine oil........................................................................................................................14
4.3. Changeoillter ......................................................................................................................................15
4.4. Engine tuning program..........................................................................................................................16
4.5. Functional test ........................................................................................................................................16
5. PETROL SUPPLY AND AIR INTAKE................................................................... 17
5.1. Maintenanceoflteringelement .........................................................................................................18
6. STARTING SYSTEM........................................................................................... 20
6.1. Replacement of brushes .......................................................................................................................20
6.2. Replacement of starting motor.............................................................................................................22
7. CARBURATION................................................................................................ 23
7.1. Removing and cleaning the carburettor.............................................................................................23
7.2. Replacing the carburettor.....................................................................................................................27
7.3. Adjusting minimum speed ....................................................................................................................27
7.4. Adjusting maximum speed...................................................................................................................28
7.5. Adjusting the carburation......................................................................................................................28
CONTENTS
<< BACK >>

pag. 4
Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
Service manual
8. GOVERNOR SYSTEM OF THE CARBURETTOR ................................................. 29
8.1. Adjusting of accelerator cable ............................................................................................................29
8.2. Verify petrol pump (if present)..............................................................................................................30
8.3. Pump replacement (if present).............................................................................................................30
8.4. Adjusting maximum speed...................................................................................................................31
9. IGNITION......................................................................................................... 33
9.1. Checkingtheefciencyoftheignitionsystem ..................................................................................33
9.2. Adjusting the air gap and checking the coil......................................................................................34
9.3. Replacing the coil..................................................................................................................................36
10. ENGINE BLOCK - External repairs............................................................... 37
10.1. Checking the compression...................................................................................................................37
10.2. Adjusting the valve clearance .............................................................................................................38
10.3. Dismantling and cleaning the cylinder head .....................................................................................39
10.4. Overhauling the cylinder head and valves ........................................................................................41
10.5.Dismantlingandreplacingthemagnetoywheel .............................................................................44
10.6. Checking the oil breather.....................................................................................................................46
10.7.Replacingtheuppercompressionringoftheengineshaft(ywheelside) ....................................46
10.8. Verify alternator charge........................................................................................................................47
10.9.Replacingthelowercompressionringoftheengineshaft(sumpside)..........................................48
11. ENGINE BLOCK - Overhauling internal parts............................................. 49
11.1. Remove the engine from the machine................................................................................................49
11.2. Carter opening.......................................................................................................................................49
11.3.Dismantlingandcheckingthecamshaftandcounterweightgovernor..........................................51
11.4. Dismantling and checking the piston, piston rings, connecting rod and engine shaft..................54
12. TURNING OFF AND STOPPING ENGINE....................................................... 61
13. EXHAUST SYSTEM.......................................................................................... 61
14. TROUBLESHOOTING...................................................................................... 62
15. CHARGING SYSTEM ..................................................................................... 64
15.1 Electrical diagram..................................................................................................................................64
15.2 Control of the charging system ............................................................................................................65
15.3 Recharge system diagram....................................................................................................................66
CONTENTS
<< BACK >>

Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
pag. 5
Service manual
The purpose of this manual is to provide to Service
Centres the information necessary for a correct
maintenance, dismantling and repair procedure
for engines TRE 586V - TRE 586VA - TRE 635V.
Interventions on the engine must be performed
in accordance with instructions in the following
pages and with safety regulations in force in the
country in which the engine is operated, and only
byauthorisedandappropriately trained personnel.
In every manual page the following informations
are described:
pag. 18 Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
Service manual
General information
The
located betweenthe carburettorand thecylinder head, whichcarries theair/petrol mixtowards theintake
valve.
See the relevant section [ 14] or advice on resolving problems due to the malfunctioning of the air
intake system.
cylinder.
components.
5. PETROL SUPPLY AND AIR INTAKE
2
1
3
3
4
5.1.
WARNING: Never run the engine without
air filter. The engine would certainly be
damaged.
1).
2 - Open the cover (1) by turning the knob (2) anti-
clockwise (open padlock symbol).
3) and remove the
4) from the cartridge.
A: Motor type for which the page is valid;
B: Reference to the chapter and the argument
with the relative numbering;
C: Presence of previous or following chapters from
the present chapter;
D: Issue date or possible audit;
E: Audit number;
F: Page progressive numbering.
INTRODUCTION
A
B
CC
DE
F
Certainsymbolsareusedinthe manual, highlighting
particularly important information, risks, warnings
and prescriptions:
Warns of operations that should be carried
out with utmost care to avoid impairing the
functionality and safety of the lawnmower.
Warns of operations that should be carried
out with utmost care to avoid impairing the
functionality and safety of the lawnmower.
NOTE: Refers to specific advice by the
manufacturer.
Reference to another procedure or part of
the manual.
Recommends that washers and O-rings are
checked and replaced if necessary.
Refers to use of special tools.
Shows all the operations requiring different
intervention methods depending on the
engine version.
NOTE: During the description of procedures,
the indications “right”, “left”, “front”, “rear”,
“upper” and “lower” refer to the engine
mounted on the machine seen from the
user’s perspective.
Integrated abbreviations:
“RON”: Ride On
“FM”: Front Mover
Please read all the contents of this manual to
become familiar with the basics of the engine,
which is fundamental for operating in a logical
manner without making errors or wasting time.
INDEX
<< BACK >>

pag. 6
Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
Service manual
1.1. Guarantee validity
Thewarrantyissuppliedundertheterms,procedures
and limits stated in the contract.
1.2. Service repairs after guarantee period
The Service Centre must write a report for each
intervention containing the serial number of the
engine[ 3.1], summary information about the
problems complained of, the intervention made
and possible spare parts used.
A copy of these reports must be kept and made
available to the manufacturer together with the
replaced parts, in case clients should make further
complaints.
1.3. Faultnotication
The manufacturer should be informed of all faults
that recur frequently; this allows it to carefully
examine the problem and make corrections on
the production line.
Similarly, the manufacturer shall report any
faults traced on its engines, indicating the best
troubleshooting procedure.
1.4. Spare parts request
When asking for spare parts, you must quote
their code by referring to the exploded views
correspondingtotheyearofmanufacturereported
on the nameplate [ 3.1].
Useonly original spareparts;the useofnon-original
spare parts may compromise the efciency and
durability of the engine.
Gaskets, washers, O-rings and oil seals must be
checked and, if necessary, replaced during every
inspection and/or maintenance operation.
1. RULES AND PROCEDURES FOR SERVICE CENTRES
INDEX
<< BACK >>

Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
pag. 7
Service manual
2. GENERAL AND SAFETY REGULATIONS
IMPORTANT: Before commencing with any
intervention, carefully read the information
provided in the present manual, in particular
the following safety regulations.
2.1. Qualicationofoperators
All maintenance, disassembly and repairs must
be carried out by expert mechanics who are
familiarwith all theaccidentprevention and safety
regulations after reading through the procedures
in this manual.
2.2. Safety measures
All the engines are built in conformity with the
European safety regulations in force.
To maintain initial safety levels in the long term, the
Service Centre should take proactive measures by
making checks whenever possible.
Every time you are asked to service the engine (or
the machine on which it is installed), you should:
• check:
- that the safety devices function correctly;
- that the casings and protection covers have not
been removed;
- thatthenameplatesorspecicationlabelshave
not been removed or made illegible, (as they
form an integral part of the safety devices).
• Also:
- restore to proper working order any safety
devices which have been manipulated or
removed;
- replace ineffective, damaged or missing guards
and covers;
- replace illegible labels;
- donotcarryoutoperationsormodicationson
the machine or on the engine that could affect
their performance or lead to an improper or
differentusefromtheoneforwhichithasbeen
designed and approved;
- warn the customer that the failure to comply
with the above points automatically voids
the warranty and the responsibility of the
manufacturer.
2.3. Precautions during servicing
As well as following the usual accident prevention
regulations that apply to most repair shops, we
recommend you:
- the site used for disassembly and assembly must
be clean;
- checking and maintenance operations must
becarriedoutwiththeengineswitchedoffand
cold; high temperature operation of the engine
may cause injury and/or burns;
- clean the engine, removing dirt/dust, metal
debris, carbon deposits, grease stains and other
impuritieswithcleaningagentsandcompressed
air;
- prepare suitabletools and devicesfor disassembly
and assembly;
- when dismantling, highlight the most difcult
parts with reference mark, this helps when
reassembling the most complex parts;
- carry out assembly in the opposite order to
disassembly, i.e. assemble in order from the
inside to the outside and from the main part to
the auxiliary part and its components, until the
wholeengineisassembled;
- disconnect the spark plug cap before servicing;
- protect hands with suitable working gloves,
especiallywhenworkingnearthecuttingunit;
- check that you do not cause accidental petrol
leaks or other losses;
- donotsmokewhenworkingonthetankorwhen
handling petrol;
- do not inhale oil or petrol fumes;
- testtheengineinawell-ventilatedenvironment
or where there are adequate exhaust fume
extraction systems;
- donotpollutetheenvironmentwith oil, petrol
or other waste and dispose of all waste in
accordancewiththelawsinforce;
INDEX
<< BACK >>

pag. 8
Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
Service manual
2. GENERAL AND SAFETY REGULATIONS
Exhaustgascontainscarbonmonoxide,which
is highly toxic, odourless and colourless.
Avoid inhaling.
- Performtestsontheengineinawell-ventilated
environment or in the presence of adequate
exhaust gas extraction systems.
- Once the engine has been assembled, perform
a test for correct operation and any adjustments
beforettingitbackontothemachine.
2.4. Warning labels
On the cowl motor, in a immediately identication
position, are some indication or prescription plates
for the safety of the operator.
The plates are as follows:
MM/YYYY
TRE586VA XXXXX
1 - Fire hazard due to:
- Petrol or oil
Prevent by following the precautions below:
- Do not smoke or ignite a ame in the vicinity of
the petrol or oil;
- Turn engine off before adding petrol;
- Do not spill petrol on overheated or electric parts
of the engine;
-Handleorstorepetroloroilinwell-ventilatedareas;
- Use non-ammable oil for cleaning engine parts.
-Accumulationofammablematerial
Prevent by following the precautions below:
-Removedryleaves,chips, pieces of paper,dustor
other ammable material which has accumulated
in or is attached to the engine.
- Electrical cabling
Short circuits can cause res. Prevent by following
the precautions below:
- Always keep the electrical connections of the
machine clean and tightly sealed;
- Tighten any loose connectors or cabling clamps.
Replace those that are damaged.
2-Observetheinstructionsand warningscontained
in the present manual and on the safety plates on
the engine.
Inappropriate functioning and maintenance can
result in serious injury or even death.
3 - Ventilation of closed areas:
In the event that it is necessary to start the engine
in a closed environment or if petrol or cleaning oil
is being used, open doors and windows to ensure
adequate ventilation and, therefore, avoid gas
poisoning.
4 - Motor label (see [ 3.1]).
2.5. Necessary equipment
All the operations can be carried out with the tools
normally used in a good garage.
The symbol used for certain interventions
indicates that special tools or equipment are
recommended.
2.6. Symbols and terms used for safety purposes
Some paragraphs in this manual are preceded by
symbols which indicate the following:
Operations that should be carried out
with utmost care to avoid impairing the
functionality and safety of the engine and/
or machine on which it is installed.
Operations that should be carried out with
utmost care to avoid injury to operators.
“WARNING” stresses the risk of injury to oneself
and others if instructions and regulations are not
observed.
1 2 3
4
INDEX
<< BACK >>

Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
pag. 9
Service manual
3.1. Identication
Every motor is marked with a serial number on the
base and applied on the cowl; this serial number
can identify:
MM/YYYY
TREXXXX XXXXX
NOTE - The monthly progress reading is reset
to zero every month.
The serial number must be reported on every
operating sheet in the warranty application and
is fundamental for identifying and ordering spare
parts.
3.2. Technical data
TRE 586VA TRE 586V TRE 635V
Displacement 586 cc 586 cc 635 cc
Bore 73 mm 73 mm 76 mm
Stroke 70 mm
Minimum speed (SLOW)
1800 (±150) r.p.m.
Ride On (RON) 2800 (±100) r.p.m.
Front mover (FM) 3200 (±100) r.p.m.
Oil sump capacity 1,70 litres
Weight 36 kg
3.3. Adjustments
Distance between spark plug
electrodes 0,7 - 0,8 mm
Coil air gap 0,3 - 0,40 mm
Inlet valve clearance 0,10 - 0,15 mm
Exhaust valve clearance 0,10 - 0,15 mm
Generator charge 3,0 ÷ 4,0 Ω(Ohm)
3. TECHNICAL DATA AND SPECIFICATIONS
3.4. Expendable materials
Petrol Unleaded (green)
minimum 90N.O.
Engine oil
- from 5 to 35 °C
-from -15to +35°C
SAE 30 - 10W30
Spark plug RN9YC (Champion)
or equivalent
3.5. Use limits
The following table gives the use limits of certain
components subject to wear, after which the
component must be replaced.
TRE 586VA - TRE 586V
TRE 635V
Brushes lenght starter push
botton 11,7 ÷ 8,0 mm
Compression 12,5 bar
Minimum inlet valve stem
diameter 6,515 mm
Minimum exhaust valve stem
diameter 6,495 mm
Minimum inlet valve head rim
thickness 2,70 mm
Minimum exhaust valve head
rim thickness 3,20 mm
Valveseatwidth 2,0 mm
Minimum valve spring length
39,0 mm
Maximumgapbetweenendsof
cylinder rings 1,0 mm
Max. axial gap for compression
rings 0,11 mm
Minimumgudgeon pindiameter 16,90 mm
Max. gudgeon pin-piston seat
diameter 17,07 mm
Max.connecting
rod diameter
gudgeon pin
side 17,07 mm
crank side 38,075 mm
Diameter connecting rod’s pin
on engine shaft 37,93 mm
Verify the engine shaft extremes 0,10 mm
DiameterPump seatoncamshaft
15,916 mm
Diameter aspiration cam 29,75 mm
Diameter discharge cam 29,75 mm
Diameter oil pump seat
40,90 mm
Height pump cylinder
8,90 mm
Cylinder/seat clearance on the
pump 0,34 mm
Month of
manufacture
Year of manufacture
Monthly
progress reading
INDEX
<< BACK >>

pag. 10
Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
Service manual
3. TECHNICAL DATA AND SPECIFICATIONS
3.6. Tightening torques
8-12 Nm
25-32 Nm
8-12 Nm
8-12 Nm
50-55 Nm
8-12 Nm
8-12 Nm
8-12 Nm
8-12 Nm
8-12 Nm
8-12 Nm
24-32 Nm
8-12 Nm11-13 Nm8-12 Nm
80-100 Nm
24-32 Nm
INDEX
<< BACK >>

Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
pag. 11
Service manual
3. TECHNICAL DATA AND SPECIFICATIONS
3.7. Table of Tightening torques
Chapter Ref. Descriptionofscrew Tightening torques
6 Fixing screw starting motor 24 - 32 Nm
6 Starting motor screw 8 - 12 Nm
7Fixing nuts carburettor and lter 8 - 12 Nm
8 Support screws petrol pump 8 - 12 Nm
8 -10 Screw support steering lever 8 - 12 Nm
9Coil xing screws 8 - 12 Nm
9 - 10 Spark plug tightening torque 25 - 32 Nm
10 Attachment bolt ywheel 80 - 100 Nm
10 Screws valve cover 8 - 12 Nm
10 Manifold xing screws 8 - 12 Nm
10 Fixing head screws 50 - 55 Nm
10 Fan grille xing screws 8 - 12 Nm
10 Screws small plate drop wire 8 - 12 Nm
10 Fixing screws generator 8 - 12 Nm
11 Screws cover oil pump 8 - 12 Nm
11 Union screws under carter and sump 24 - 32 Nm
11 Fixing screws lower connecting rod cap 11 - 13 Nm
Forthetighteningtorquesofallotherstandardscrews,refertotheuniedtablebelow:
Fastening parts Specicmeasures Tightening torques
Bolts and nuts
5 mm 4 - 7 Nm
6 mm 8 - 12 Nm
8 mm 20 - 28 Nm
10 mm 35 - 40 Nm
12 mm 50 - 60 Nm
INDEX
<< BACK >>

pag. 12
Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
Service manual
3.8. Identicationofengineunits
For ease of reference, this manual has subdivided maintenance operations into different sections, each of
which refers to an engine component unit as indicated in the diagrams below.
3. TECHNICAL DATA AND SPECIFICATIONS
Ignition
Starting system
Air intake
Engine block
Turning off and stopping engine
Carburettor
Carburation control
INDEX
<< BACK >>

Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
pag. 13
Service manual
4. ENGINE TUNING AND TESTING
4.1. Operating guidelines
The engine requires a series of interventions (shown in the table below) in order to ensure minimum basic
maintenance.
Operation First 5
hours
Every 5
hours or
daily
Every 25
hours or
every
season
Every 50
hours or
every
season
Every 100
hours Every 200
hours Every 300
hours
Check oil level -■-----
Change oil *(1) ■---■- -
Change oil lter ----■- -
Check and oil pre-lter *(2) -■-----
Blow lter *(2) - - ■----
Change air lter ---■---
Check spark plug ---■---
Replace spark plug ----■- -
Checking and replacing the fuel lter
----■- -
Petrol tube replacement
Every 2 years (if necessary)
Checking valves clearance
-----■-
Combustion chamber cleaning
------■
*(1) Replace the oil every 25 hours if the engine is working at full load or at high temperatures.
*(2) Clean the air lter more often if the machine is working in dusty areas.
For the operations that are not difcult for the nal user the assistance centre must maintain the motor in
perfect efciency, in accordance with two intervention lines:
- Tuning the engine whenever possible.
- Recommending the client a routine maintenance program at set intervals (e.g. at the end of the season
or before a long period of inactivity).
INDEX
<< BACK >>

pag. 14
Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
Service manual
4.2. Changing the engine oil
NOTE -Drain the engineoil when themachine
is stationary but not completely cold so as
to ensure that the oil is drained quickly and
completely.
The engine oil affects the performance and
durability of the petrol. It is recommended that
engine oil containing additives and two-stroke
engine oil are not used because they lack
lubrication.Thedifferentviscosityoftheoilincreases
petrol consumption and also reduces engine
performance.
-Clean the area around the ller cap with the
dipstick.
-Remove the ller cap with dipstick and drain the
engine oil by following the steps below.
1 - Remove the protection (1) and release the clip
(2) from the seat;
2 - Pull the hose (3) downwards from the tting and
let the engine oil drain into a suitable container.
3-Checkthatthehoseisnotdamagedbutisintact,
otherwise replace it.
Engine oil capacity
Use a 4-stroke engine oil of high detergent quality.
SAE30 10W-30 is recommended for general use at
alltemperatures.Otherviscositiesshowninthetable
maybeusedwhentheaveragetemperatureinthe
area is within the indicated range
4 - When the machine is cold and on at ground,
unlock the ller cap tted with dipstick and check
the level indicated.
Top up and start the engine for a few minutes,
check the level after a few minutes by repeating
the step if necessary, until the oil level reaches the
upper limit as shown in the gure.
4. ENGINE TUNING AND TESTING
T-10-20 0
Engine
oil
10 20 30 40°C
14-4 32 50 68 86 104°F
SAE 5W-20
SAE 10W-30 / SAE 15W-40
SAE 30
SAE 40
Upper limit
Lowerlimit
1
2
3
INDEX
<< BACK >>

Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
pag. 15
Service manual
4.3. Changeoillter
1 - Protect the underlying surface from oil leaks
with a cloth.
2 - With the help of plier (4) unscrew the lter (5) in
anti-clockwise to remove it.
3 - Before installing a new lter, lightly lubricate the
new gasket with clean engine oil.
4 - Lock the lter into the housing by turning it clock-
wise until the gasket touches the lter adapter.
Tighten 1/2 to 3/4 extra turns to ensure tightness.
5 - Start the engine to check for oil leaks.
WARNING: The used oil contains dangerous
substances that can cause skin irritation; use
of gloves is recommended.
If you come into contact with or have long-
term exposure to used oil, it is recommended
that you wash your hands thoroughly with
soap and clean water as soon as possible.
WARNING: Dispose of the used oil in a
suitable sealed container.
Used oil must be delivered to the appropriate
collection centres in the country where the
machine has been used where the specic
regulations are in force. Do not dispose of
in landll or disperse into the environment.
4. ENGINE TUNING AND TESTING
INDEX
<< BACK >>

pag. 16
Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
Service manual
c. Check the engine rpm
When the engine is hot enough, check the engine
speed with the throttle control set to “SLOW”
and “FAST”; the readings should be equal to the
specications [ 3.2].
d. Hot start test
With the engine hot and the throttle control set to
“SLOW”, start the engine a few times to check it
runs normally.
If all of these operations have a positive result, the
enginecanbe considered fullyserviceableand be
returned to the client.
4.4. Engine tuning program
Aspartofgeneralengine tuning or any intervention
onthemachine,itisrecommendedthat the Service
Centre performs a series of operations aimed at
maintaining the engine’s efciency.
Tuning should involve:
- external blowing and cleaning the cylinder
head, cylinder and mufer by removing any
remains of grass and mud;
- checking the oil level, topping up or replacing
parts if necessary;
- cleaning the air lter [ 5.1];
-
adjusting minimum and maximum speeds
[ 7.3] and [ 8.4];
- inspecting the condition of the spark plug;
checking the distance between the electrodes
[ 9.1];
- tightening the screws [ 11.2];
- functional test [ 4.5].
Should the checks and adjustments fail to achieve
a satisfactory result, refer to chapter [ 14] for
troubleshooting.
4.5. Functional test
A functional test needs to be carried out at the
end of each servicing operation, to check that the
operations made are effective. The test must be
performed in accordance with safety regulations
provided for the use of the machine on which the
engine is mounted.
The functional test is carried out as follows:
a. Refuelling and checking the supply system
When you have refuelled the tank with new petrol,
check the seal of the tank, the cap and the
carburettor pipe.
b. Cold starting test
With the “CHOKE” lever pulled upwards, perform
a few starts to ensure there are no issues with this.
4. ENGINE TUNING AND TESTING
<< BACK >>
INDEX

Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
pag. 17
Service manual
IMPORTANT: Carefully read the information below before commencing any intervention.
General information
The petrol supply occurs via a tank mounted on the machine and connected to the carburettor by a pipe.
A lter, positioned between the tank and the petrol pump, stops deposits and impurities from reaching the
carburettor.
Supply to the oat chamber of the carburettor occurs via the petrol pump and the volume of petrol taken
from the tank during operation is compensated by a breather tted in the cap.
See the relevant section [ 14] for advice on resolving problems due to the malfunctioning of the petrol
supply system.
WARNING! All interventions on the supply system must be performed in safe conditions, therefore:
- do not smoke;
- workinaventilatedenvironmentawayfromnakedamesorunprotectedsourcesofheat;
- collect any remaining petrol by positioning a suitable container under the engine, avoiding soiling the
workbench;
- remove all traces of spilt petrol immediately.
5. PETROL SUPPLY AND AIR INTAKE
<< BACK >>
INDEX

pag. 18
Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
Service manual
General information
Thelteringsystemconsists of an air lter directly connected to the carburettor and an internal manifold,
locatedbetween thecarburettor and thecylinder head, whichcarries the air/petrol mix towardsthe intake
valve.
See the relevant section [ 14] or advice on resolving problems due to the malfunctioning of the air
intake system.
Aninefcientltercanletdustordebrisenterthecylinder,causingprematureweartothepistonringsand
cylinder.
The air lter is located on the front side of the engine and can be inspected without removing other
components.
5. PETROL SUPPLY AND AIR INTAKE
2
1
3
3
4
5.1. Maintenanceoflteringelement
WARNING: Never run the engine without
air filter. The engine would certainly be
damaged.
1 - Clean around the lter cover (1).
2 - Open the cover (1) by turning the knob (2) anti-
clockwise (open padlock symbol).
3 - Remove the lter element (3) and remove the
prelter (4) from the cartridge.
<< BACK >>
INDEX

Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
pag. 19
Service manual
H2O
H2O
4 - Touch the cartridge on a solid surface and blow
withcompressedairfromthe interior side toremove
dust and product residues.
IMPORTANT! For the cartridge cleaning don’t
use water, petrol, detergent.
5 - Wash the prelter with water and detergent and
let it air dry.
IMPORTANT! The preleter MUST NOT be oiled.
6 - Ret the prelter (4) on the cartridge.
7 - With a jet of compressed air, clean inside the
seat (5) of the lter by removing dust and remains
of grass, making sure that the intake pipe hole (6)
is closed so that nothing gets inside the pipe.
8 - Place the lter element in its housing, close the
cover (1) and lock it by turning the knob clockwise
(closed padlock symbol).
5. PETROL SUPPLY AND AIR INTAKE
H2O
H2O
5
6
1
<< BACK >>
INDEX

pag. 20
Release 00 - 12/2019
Engine TRE 586V-TRE 586VA-TRE 635V
Service manual
General information
The starting system consists of the starting motor mounted on the engine casing which transmits movement
to the ywheel and therefore, to the engine shaft.
Seethe relevant section[ 14] foradvice onresolvingproblems due tothemalfunctioning of thestarting
system.
The starter motor is situated on the right side of the engine (in relation to the direction of travel) and for
maintenance, it is necessary to dismantle it by following the steps below.
6. STARTING SYSTEM
1
2
2
3
6.1. Replacement of brushes
1 - Loosen the four screws (2) on the cowl.
2 - Remove the cowl (1) from the engine by lifting
it up.
3 - Disconnect the two connectors (3) and (4) from
the machine.
1
4
<< BACK >>
INDEX
This manual suits for next models
2
Table of contents
Other Stiga Engine manuals

Stiga
Stiga TRE 352 User manual

Stiga
Stiga TRE 224 Instruction manual

Stiga
Stiga TRE586VA User manual

Stiga
Stiga WBE Series User manual

Stiga
Stiga WBE120 User manual

Stiga
Stiga TRE586VA User manual

Stiga
Stiga WBE120 User manual

Stiga
Stiga TRE 352 User manual

Stiga
Stiga TRE 352 Instruction manual

Stiga
Stiga WBE170 Instruction manual

Stiga
Stiga TRE 0701 User manual

Stiga
Stiga WBE120 User manual

Stiga
Stiga RS100 Instruction manual

Stiga
Stiga TRE586VA User manual

Stiga
Stiga TRE 0701 User manual

Stiga
Stiga TRE 0702 Instruction manual

Stiga
Stiga K 1250 ADV User manual

Stiga
Stiga TRE 352 User manual

Stiga
Stiga TRE 352 User manual

Stiga
Stiga TRE 0701 User manual