Stiga PARK PRO 20, PARK PRO 16, PARK PRESIDENT, Park SENATOR, PARK COMFORT Instructions For Use Manual

STIGA PARK

PRO 20
PRO 16

ROYAL

PRESIDENT

SENATOR

8211-0276-04

PARK

19

20

3

4

6

5

1

16

1.

2.

3.

PARK

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9

10

7

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9

14

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15

16

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16

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7

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18

17

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4. Senator 5. President

6. Royal 7. Pro 16

8. Pro 20

PARK

10.

12.

14. Royal

16.

11.

13. Senator - President

15.Pro16-Pro20

17. Royal

PARK

0.75 mm

18. Pro 16 - Pro 20

19. Senator - President

20. Royal

21. Pro 16 - Pro 20

22. Pro 20 Cat

23.

24. Senator - President

25.Pro16-Pro20

PARK

MAX

26.

27.

28.

29a. President - Royal

29b. Pro 16 - Pro 20 30. Senator - President - Royal

PARK

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GENERAL

This symbol indicates WARNING. Per­sonal injury and/or damage to property
may result if the instructions are not
followed carefully.

You must read these instr uctions for
use and the accompanying pamphlet
“SAFETY INSTRUCTIONS” careful­ly, before starting up the machine.

SYMBOLS

The following symbols appear on the machine.
They are there to remind you of the care and atten­tion required in use.

This is what the symbols mean:

Warning!
Read the instruction manual and thesafety
manual before using the machine.

Warning!
Watch out for discarded objects. Keep on­lookers away.

Warning!
Always wear hearing protectors.

Warning!
This machine is not designed to b e driven
on public roads.

Warning!
The machine, equipped with original ac­cessories, must not be driven in any direc­tion on slopes with a gradient greater than
10º.

Warning!
Risk of crushing injuries. Keep hands and
feet well away from the articulated steer­ing joint.

Warning!
Risk of burn injuries. Do not touch the si­lencer/catalytic converter.

CONTROLS AND

INSTRUMENTS

Items 1 - 20, see figures 1 - 8.

1. IMPLEMENT LIFTER
(Senator - President - Royal - Pro16)

A pedal for raising front-mounted implement to
the transport position.

To lift up the implement, press the pedal down as
far as it will go. Then release the pedal, the imple­ment lifter is now locked in the raised position.

To lower the implement, press the pedal down so
that the lock is released. Lower the implement lift­er to the working position by slowly lifting your
foot from the pedal.

2. HYDRAULIC LIFTER (Pro20)

Hydraulic implement lifter for raising front­mounted implements to the transport position.

To raise the implement, press the rear
part of the switch. Release the switch
in the required position.

To lower the accessory, press the
front part of the switch. The switch
staysinthepressedpositionandthe
implement lifter is lowered until it
reaches a floating position. This
means that the implement can follow
the contours of the ground.

The floating position, with the switch in the tilted
forward position, is recommended for normal use.
To secure the implement lifter, place the switch in
neutral.

NOTE! The hydraulic implement lifter m ust be
in floating position in order for the power take­off to be connected.

3A. SERVICE BRAKE/CLUTCH
(Senator)

A pedal that combines both service brake and
clutch. There are 3 positions:

1. Pedalreleased–forwarddrive
engaged. The machine will
move if a gear is engaged. Serv­ice brake not activated.

2.Pedaldepressedhalfway–forwarddrivedisen­gaged, gear shifting can be performed. Service
brake not activated.

3. Pedal fully depressed – forward drive disen­gaged. Service brake fully activated.

NOTE! You must never regulate the operating

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speed by slipping the clutch. Use a suitable gear in­stead, so that the right speed is obt ained.

3B. SERVICE BRAKE
(President - Royal - Pro16 - Pro20)

A pedal that acts on the machine’sbraking system.
There are 3 positions:

1. Pedal released – service brake
not activated.

2. Pedal depressed halfway –
forward drive disengaged. Serv­ice brake not activated.

3. Pedal fully depressed – for­ward drive disengaged. Service
brake fully activated.

4. PARKING BRAKE

An inhibitor that can lock the brake pedal in the de­pressed position.

Depress the brake pedal fully. Move the
inhibitor to the right and then release the
brake pedal.

The parking brake isreleased bypressingthebrake
pedal. The spring-loaded inhibitor slides to one
side.

Make sure that the parking brake is released when
operating the machine.

5. DRIVE PEDAL
(President - Royal - Pro16 - Pro20)

A pedal that activates the variable transmission.

1. Depress the pedal with the
ball of your foot – the machine
moves forwards.

2. No load on the pedal – the ma­chine is stationary.

3. Depress the pedal with your
heel – the machine reverses.

The drive pedal regulates the speed. The more
pressure applied, the faster the machine will move.

6. ADJUSTABLE STEERING WHEEL
(President - Royal - Pro16 - Pro20)

The height of the steering wheel is infinitely ad­justable. Undo the adjustme nt knob on the steering
columnand raiseorlower thesteering wheeltothe
desired position. Tighten.

Do not a djust the steering wheel during opera­tion.

7. THROTTLE/CHOKE CONTROL

A control for setting the engine speed and to choke
the engine when starting from cold. (The latter
does not apply to Royal-Pro16-Pro20 which have
separate choke control – see item 8).

1. Choke – for starting a cold engine. The
chokeis locatedin topof groove(doesnot
apply to Royal-Pro16-Pro20). Avoid op­erating the machine inthis position, taking
care to move the control to full throttle
(see below) when the engine is warm.

2. Full throttle – when the machine is in
operation, full throttle should always be
used.

3. Idling.

8. CHOKE CONTROL
(Royal - Pro16 - Pro20)

A pull-type control to choke the engine when start­ing from cold.

1. Control fully pulled out – choke valve
in carburettor closed. For starting cold en­gine.

2. Control pushed in – choke valve open.
For starting warm engine and when oper­ating the machine.

Never operate the machine with the choke
pulled out when the engine is w arm.

9. IGNITION LOCK/SPOTLIGHT

Ignition lock used for starting/stopping the engine.
Also includes switch for spotl ight (Senator does
not have a spotlight). Four positions:

1. Stop position – the engine is short­circuited. The key can be removed.

2. Operating position – spotlight activat­ed.

3. Operating position – spotlight not acti­vated.

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4. Start position – the electric start motor
is activated when the key is turned to the
spring-loaded start position. Once the en­gine has started, let the key return to oper­ating position 3.

To turn on t he spotlight, turn the key to position 2.

NOTE! If the key is turned from the stop posi­tion to operating position 2, the spotlight is acti­vated. This uses up battery power.Do not leave
the machine with the key in position 2 (applies
to Pro16-Pro20).

10. GEAR LEVER (Senator)

A lever for selecting one of the five forward gears
in the gearbox (1-2-3-4-5), neutral (N) or reverse
(R).

The clutch pedal must be kep t pressed in when
changing gear.

NOTE! You must make sure the machine is quite
stationary before changing from reverse toforward
gear or vice versa. If a gear does not engage imme­diately,release theclutch pedal andthen press it in
once again. Engage the gear once again. Never
force a gear in.

11. POWER TAKE-OFF
(Senator - President - Royal - Pro16)

A lever for engaging and disengaging the power
take-off for operating front-mounted accessories.
T wo positions:

1. Lever in forward position – power take­off disengaged.

2. Lever in backward position - power
take-off engaged.

12. POWER TAKE-OFF (Pro20)

Switch for engaging/disengaging the electromag­netic power take-off for operating front-mounted
accessories. Two positions:

1. Press the front part of the switch – the
power take-off is engaged. The symbol
will light up.

2. Press the rear part of the switch – the
power take-off is disengaged.

13. DIFFERENTIAL INHIBITOR
(Pro16 - Pro20)

Lever for engaging the differential inhibitor. This
improves the towing capacity by locking the rear
wheels so that both wheels drive simultaneously.
Two positions:

1. Forward position – the differential in­hibitor is not engaged. For normal opera­tion.

2. Lever in backward position - differen­tial inhibitor engaged. Works for both for­ward and reverse drive.

The differential inhibitor is of greatest use when
the rear wheels are unevenly loaded. For example
when turning sharp corners where the inner rear
wheel bears a lesser load.

When driving duringthe winter on slippery surfac­es, the drive capacity is improved if snow chains
are not used.

When the differential inhibitor is engaged, the
steering is heavy. Avoid turning the steering
wheel!

14. HOUR COUNTER
(President - Royal - Pro16 - Pro20)

Indicates the number of working hours. Only
works when the engine is running.

15. CRUISE CONTROL
(Royal - Pro16 - Pro20)

A switch for activating the cruise control. The
cruise control allows the drive pedal (5) to be
locked in the desired position.

1. Press down the drive pedal until the de­sired speed is obtained. Then press the
front part of the switch to activate the
cruise control. The symbol will light up.

2. Disengage the cruise control by braking
or pressing the r ear part of the switch.

16.CUTTING HEIGHTADJUSTMENT
(Royal - Pro16 - Pro20)

The machine is equipped with a control for using
the cutting deck with electrical cutting height ad­justment (available as an accessory).

Theswitchisusedtoadjustthecutting
height in continuously variable positions.

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The contact used for connecting the cutting deck is
mounted on the right side, in front of the front
wheel (fig. 2).

17. REAR R AKE (Pro20)

The machine is fitted with a control for electrical
adjustment of a rear rake (available as an accesso­ry).

Theswitchisusedtoraiseandlowerthe
rear rake.

Cables for connecting the rear rake are found at the
rear of the machine, to the left of the upper side of
the bumper. (Pro16 is prepared for a rear rake, ca­bles routed).

18. SAND SPREADER (Pro20)

The machine has been designed for electrical ad­justment of a sand spreader (available as an acces­sory).

Theswitchisusedtostartandstopthe
spreader.

The contact for connecting the sand spreader is
found at the rear of the machine, to the left of the
upper side of the bumper. (Pro16 is prepared for a
sand spreader, cables routed).

19. DISENGAGING LEVER
(President - Royal - Pro16 - Pro20)

A lever for disengaging the variable transmission.
Enables the machine to be moved by hand without
the help of the engine. Two positions:

1. Lever moved back – transmis­sion engaged for normal opera­tion.

2. Lever moved forward – trans­mission disengaged. The ma­chine can be moved by hand.

The machine may not be towedoverlong distances
or at high speeds. The transmission could be dam­aged.

20. FUEL GAUGE/FUEL CAP

Fuel cap with built-infuel gauge that indi­cates how much fuel there is in the fuel
tank (applies to Royal-Pro16-Pro20).

Senator and President have a fuel cap without a
fuel gauge.

The fuel tank holds approx. 11.5 litres.

AREAS OF USE

Themachinemayonlybeusedforthefollowing
tasks using the genuine STIGA accessories stated.

1. Mowing

Using cutting deck 13-2939 (92M), 13-2927/
13-2935 (107M), 13-2951/13-2952 (107 M
HD), 13-2915/13-2921 (121M) or flail mower
13-1977.

2. Sweeping

Using brush unit 13-1933 or collector brush
unit 13-1939. Use of dust guard 13-1936 is rec­ommended with the first option.

3. Snow clearance

Usingsnow blade13-0918 or snow thrower 13-

1948. Snow chains 13-1956 (16“)/13-0902
(17“) and frame weights 13-0923 are recom­mended.

4. Grass clipping and leaf collection

Using towed collector 13-1978 (30") or 13­1950 (42").

5. Grass and leaf transport

Using dump cart 13-1979 (Standard), 13-1988
(Maxi) or 13-1992 (Combi).

6. Sand spreading

Using sand spreader 13-1975. Can also be used
for spreading salt. Snow chains 13-1956 (16“)
13-0902 (17“) and frame weights 13-0923 rec­ommended.

7. Weeding on gravel paths

Using front mounted hoe 13-1944 and rear­mounted rake 13-1969.

8. Lawn edge trimming

Using edge trimmer 13-0905.

9. Moss scarification

Using moss scarifier 13-1984.

The maximum vertical load on the towing hitch
must not exceed 100 N.

The maximum over-run load on the towing hitch
from towed accessories must not exceed 500 N.

NOTE! Before using a trailer – contact your insur -

12V

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ance company.
NOTE! This machine is not intended to be driven

on public roads.

STARTING AND OPERATION

ENGINE CASING

To inspect and maintain the engine and battery, re­move the engine casing. Dismantling:

1. Unscrew the fuel cap/fuel gauge.

2. Pull up the rubber strap at the front edge of the
casing (fig. 10).

3. Carefully lift off the engine casing (fig. 11).

Assembly:

1. Place the casing over the lip on each side.

2. Make sure that the pins on the rear edge of the
casing go down into the respective holes (fig.

12).

3. Secure the front edge of the casing with the rub­ber strap (fig. 10).

4. Finally, screw in the fuel cap/fuel gauge.

The machine may not be operated un­less the engine casing is mounted. Risk
of burns and crushing injuries.

FILLING THE FUEL TANK

Alwaysuselead-freepetrol.Youmust never use2­stroke petrol mixed with oil.

NOTE! Bear in mind that ordinary lead-free petrol
is a perishable; do not purchase more petrol than
canbeusedwithinthirtydays.

Environmental petrol can be used, i.e. alkylate pet­rol. This type of petrol has a composition that is
less harmful for people and nature.

Petrol is highly inflammable. Always
store fuel in containers that are made
especially for this purpose.

Onlyfill or top up withpetrol outdoors,
and never smoke when filling or top­ping up. Fill with fuel before starting
theengine.Neverremovethefillercap
or fill with petrol while the engine is
running or still warm.

Never completely fill the petrol tank. Leave an

empty space (= at least the entirefiller tube plus 1

- 2 cm at the top of the tank) to allow the petrol to
expand when it warms up without overflowing
(fig. 28).

CHECKING T HE ENGINE OIL LEVEL
(Senator - President - Pro16 - Pro20)

On delivery, the crankcase is filled with SAE 30
oil.

Check the oil level every time before using to
ensure it is correct. The machine should be
standing on level ground.

Wipe clean around the oil dipstick. Un­screw and pull it up. Wipe off the dipstick.
Slide it down completely and tighten it.

Then unscrew it and pull it up again. Read off the
oil level. Top up with oil to the “FULL“ mark, if
the level comes below it (figs. 13, 15).

CHECKING THE ENGINE OIL LEVEL
(Royal)

On delivery, the crankcase is filled with SAE
10W-40 oil.

Check the oil level every time before using to
ensure it is correct. The machine should be
standing on level ground.

Wipe clean around the oil dipstick. Un­screw and pull it up. Wipe off the dipstick.
Slide it down completely without tighten-

ing it.

Pull it up again and read off the oil level. Top up
with oil to the “UPPER” mark, if the oil level is be­low it (fig. 14).

CHECKING T HE TRANSMISSION
OIL LEVEL
(President - Royal - Pro16 - Pro20)

The transmission is filled with SAE 10W-40 oil
when the machine is delivered from the factory,

Check the oil level every time before using to
ensure it is correct. The machine should be
standing on level ground.

Read off the oil level in the reservoir (fig. 29). It
shouldbe between the “MAX” and “MIN” marks.
If necessary, top up wi th more oil. Use oil SAE
10W-40 (20W-50).

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SAFETY SYSTEM

Thismachineis equippedwith a safetysystem that
consists of:

- a switch on the gearbox (only Senator).

- a switch at the brake pedal.

- a switch in the seat (Senator, President) or the
seat bracket (other models).

- a switch at the power take-off engagement le­ver.

In order to start the machine, the following are nec­essary:

- gear lever in neutral (only Senator).

- brake pedal pressed down.

- driver sitting on seat.

- power take-off engagement lever in forward po­sition (i.e. power take-off disengaged).

Always check the operation of the safe­ty system before using the machine!

With the engine running and the driver sitting on
the seat, check as follows:

- selectagear,liftyourweightofftheseat–the
engine must stop (applies to Senator).

- press the drive pedal so that the machine starts
to move, release the drive pedal – the machine
must stop (applies to President, Royal, Pro16,
Pro20).

- press the drive pedal so that the machine starts
to move, engage the cruise control, lift your
weight off the seat – the machine must stop (ap­plies to Royal, Pro16, Pro20).

- press the drive pedal so that the machine starts
to move, engage the cruise control, press the
brakepedal – the machine must stop (applies to
Royal, Pro16, Pro20).

- engage the power take-off, lift your weight off
the seat – the engine must stop (applies to Sen­ator, President, Royal, Pro16).

- engage the power take-off, lift your weight off
the seat – the power take-off must be d isen­gaged (applies to Pro20).

Do not use the mac hine if the safety sys­tem is not working! Take the machine
to a service workshopfor inspection!

STARTING ENGINE

1. Open the fuel cock (fig. 16).

2. Make sure that the spark plug cable is properly

in place.

3. Check to make sure that the power take-off is
disengaged.

4a. Senator:
Put the gear lever in neutral.

4b. President-Royal-Pro16 -Pro20:
Do not keep your foot on the drive pedal.

5a. Senator-President:
Starting cold engine – put the throttle control in the
choke position. Starting warm engine – put the
throttle control at full throttle (approx. 1 cm behind
thechokeposition).

5b. Royal-Pro16-Pro20:
Putthe throttlecontrolat fullthrottle.Startingcold
engine – pull the choke control out fully. Starting
warm engine – do not touch the choke control.

6. Depress the brake pedal fully.

7. Turn the ignition key and start the engine.
8a. Senator-President:

Once the engine has started, move the throttle con­trol gradually to full throttle if the choke has been
used.

8b. Royal-Pro16-Pro20:
Once theengine hasstarted, push thechoke control
in gradually if it has been used.

9. When starting from cold, do not make the ma­chine work under load immediately, but let the en­ginerun for a few minutes first.This will allow the
oiltowarmup.

When in use, always operate the engine at full
throttle.

STOPPING

Disengage the power take-off. Apply the parking
brake.

Allowthe engineto idle1 - 2 mins. Stopthe engine
by turning off the starter key.

Shut off the petrol cock. This is particularly impor­tant if the machine is to be transported on a trailer
for example.

If the machi ne is left unattended, re­move the spark plug cable from the
sparkplug. Alsoremovethe starterkey.

The engine may be very warm immedi­atelyafter itis shut off. Do nottouchthe
silencer, cylinder or cooling fins. This
can cause burn injuries.

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CATALYTIC CONVERTER
(Pro20 Cat)

The catalytic converter gets very hot during opera­tion. The heat remains for a long time after the en­gine has been stopped. Be aware of the fire risk.

Do not park in close proximity to in­flammable objects. Do not cover the
machine until the catalytic converter
has cooled down.

STEERING AID (Pro20)

Built-in function in order to facilitate steering. The
operator only has to turn the steering wheel gently.
A hydraulic torque amplifier creates the remaining
force.

As opposed to normalservo steering(e.g.in a car),
the steering aid has a limited capacity. This means
that it has some characteristics that might be con­sidered negative:

- at a low engine rpm or in situations where extra
steering force is needed, steering can be consid­ered to be “jumpy”.

- the machine should always be moving when the
steering is used. Avoid turning the steering
wheelwhenthemachineis standingcompletely
stilland the accessoryis in the loweredworking
position.

The steering is adapted in order to produce better
results at a normal working speed. This produces
major benefits.

Even when the engine is not running, the steering
works. However, it is harder to turn in this case, if
the machine is to be manoeuvred manually.

DRIVING TIPS

Make sure that there is the correct quantity of oil in
the engine when driving on slopes (oil level on
“FULL”).

Be careful when drivi ng on slopes. No
sudden starting or stopping when mov­ing up or down a slope. Never drive
acrossa slope. Move fromthe top down,
and from the bottom to the top.

The machine, e quipped with original
accessories, may not be driven on slopes
greater than 10º in any direction.

Reduce the speed on slopes and when
making sharp t urns to prevent the ma­chine from tipping over or you losing
control of the machine.

Do not turn the steering wheel to full
lock when driving in topgearandat full
throttle. The machine can easily topple
over.

Keep hands and fingers well away from
articulated steering joint and seat
bracket. Risk of crushing injuries. Nev­er operate the machine without the en­gine casing.

SERVICE AND MAINTENANCE

SERVICE PROGRAM

In order to keep the machine in good condition, as
regardsreliabilityand operationalsafetyas well as
from an environmental perspective,STIGA’s serv­ice program should be followed.

The contents of this program can be found in the
attached service log.

We recommend that an authorised workshop car­ries out every service. This guarantees that the
work is performed by trained personnel and with
genuine spare parts.

At every service, the service log sh ould be
stamped. A “fully stamped” service log is a valua­ble document that improves the machine’s second­hand value.

PREPARATIONS

Unless otherwise stated, all service and mainte­nance mustbe carried out on a stationary machine
when the engine is not running.

Prevent the machine from rolling by al­ways applying the parking brake.

Prevent unintentional starting of the
engine by a lway s stopping the engine,
disconnecting the spark plug cable
from the spark plug and earthing it.
Disconnect the negative cable from the
battery.

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CLEANING

To reduce the risk of fi re, keep the en ­gine, silencer/catalytic converter, bat­tery and fuel tank free from grass,
leaves and oil.

To reduce the risk of fire, regularly
check the machine for oil and/or fuel
leakage.

When washing the machine with water under high
pressure, do not point the jet directly at the trans­mission.

Do not point jets of water directly at the engine.
Use a brush or compressed air in order to clean it.

ENGINE OIL
(Senator - President - Pro16 - Pro20)

Change the oil for the first time after 8 hours run­ning (Senator and President after 5 hours), and
then after every 50 hours running or once a season.
Change oil when the engine is warm.

Always use a good grade of oil (service grade SF,
SG or SH).

Change the oil more often (after 25 hours of oper­ation or at least once a season) if the engine has to
operate under demanding conditions or if the am­bient temperature is high.

Theengineoilmaybeveryhotifitis
drained off directly afte r the engine is
shut off. So allow the engine to cool a
few minutes before draining the oil.

1. Oil drain pipe (metal):

Unscrew the oil drain plug at the end of the pipe.

Collect the oil in a collection vessel. Then take
the oil to a recycling station. Do not allow oil to
get on the V-belts.

2. Screw in the oil drain plug. Make sure that the

fibre gasket and the O-ring inside the plug are not
damaged and that they are in the correct place.

3. Remove the dipstick and fill up with new oil.

Oil capacity:
Senator, President - 1.4 l
Pro16, Pro20 - 1.7 l (incl. oil filter)

Oil type, summer (> 4ºC): SAE-30
(SAE 10W-30 can also be used. However, oil con­sumption may increase somewhat if 10W-30 is
used. Therefore, check the oil level more regularly

if you use this type of oil).
Oil type, winter (< 4ºC): SAE 5W-30

(if this oil is not available, use SAE 10W-30).

Use oil without a ny additives.

Do not fill with too much oil. This can cause the
engine to overheat.

After filling up the oil, start the engine and idle for
30 seconds. Stop the engine. Wait for 30 seconds
and then check the oil level.

Check to see if there is any oil leakage. If neces­sary,filluptheoiluptothe“FULL“mark.

ENGINE OIL (Royal)

Change the oil for the first time after 20 hours of
operation (or during the first month), and then after
every 100 hours of operation or once every 6
months.

Change oil when the engine is warm. Always use
a good grade of oil (service grade SF, SG or SH).

Theengineoilmaybeveryhotifitis
drained off directly after the engine is
shut off. So allow the engine to cool a
few minutes be fore draining the oil.

Unscrew the oil drain plug at the end of the pipe
(fig. 17).

Collect the oil in a collection vessel. Then take
the oil to a recycling station. Do not allow oil to
get on the V-belts.

Screw inthe oil drain plug. Make sure that the fibre
gasket and the O-ring inside the plug a re not dam­aged and that they are in the correct place.

Remove the dipstick and fill up with new oil up to
the “UPPER” mark.

Oil capacity:
Royal - 0.9 l (= oil quantity at change. In total the
engine holds 1.15 l).

Oil type for all seasons: SAE 10W-40.
For extremely low temperatures (< -20° C), use
SAE 5W-30.

Use oil without a ny additives.

Do not fill with too much oil. This can cause the
engine to overheat.

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OIL FILTER – ENGINE
(Pro16 - Pro20)

Replace the oil filter after every 100 hours of oper­ation or once a season.

Before screwing the new filter, oil the filter gasket
with engine oil.

Screw the filter by hand, until the filter gasket
touches the filter attachment. Then tighten ½ to ¾
of a full turn (fig. 18).

Start the engine and idle to see if any leakage oc­curs.Stop the engine. Check the oil level. If neces­sary,filluptheoiluptothe“FULL”mark.

AIRFILTER-ENGINE

Senator - President - Pro16 - Pro20:

Clean the foam pre-filter every 3 months or after
every 25 hours of operation, whichever comes
first.

Clean the paper filter insert once a year or after
every 100 hours of operation, whichever comes
first.

Royal:

Cleantheairfilterevery3monthsorafterevery50
hours of operation, whichever comes first.

Clean the paper filter insert once a year or after
every 200 hours of operation, whichever comes
first.

All models:

Note! Both filters should be cleaned more often if
the machine operates on dusty ground.

1.Removethe protectivecoverof the airfilter (fig.

19 -21).

2. Dismantle the paper filter insert and the foam

pre-filter. Make sure that no dirt gets into the car­burettor. Clean the air filter housing.

3.Washthe pre-filterinliquiddetergentand water.

Squeeze dry. Pour a little oil on the filter and
squeeze in the oil.

4. Clean the paper filter insert as follows: Knock it

lightly against a flat surface. If the filter is very
dirty, change it.

5. Assemble in the reverse order.

Petroleum-based solvents such as kerosene may
not be used for cleaning the paper filter insert.
These solvents can destroy the filter.

Do not use compressed air for cleaning the paper
filter insert. The paper filter insert must not be
oiled.

AIRFILTER–CATALYTIC
CONVERTER (Pro20 Cat)

Clean the catalytic converter’s air filter every 3
months or after every 25 hours of operation,
whichever comes first.

1. Remove the cover by pressing in the locking
mechanism with a screwdriver etc. (fig. 22).

2. Remove the foam filter and wash it in liquid de­tergent and water.Squeeze dry.Do not oil the filter.

3. Replace the filter and snap the cover into place.

SPARK PLUG

Only use a Briggs & Stratton sparking tester to
check the spark in the sparking plug(s) (fig. 23).

Clean the spark plug after every 100 hours of oper­ation or once a season. For replacing a spark plug,
a spark plug sleeve A and a torsion pin B are pro­vided in the accessories bag.

The engine manufacturer recommends:
Senator-President: Champion J19LM.

Royal: NGK BPR5ES or DEN SO W16EPR-U
Pro16-Pro20: Champion RC12YC

Correct spark gap: 0.75 mm.

COOLING AIR INTAKE - ENGINE

The engine is air-cooled. A blocked cooling sys­tem can damage the engine. The engine should be
cleaned at least once a year or every 100 hours of
operation.

Remove the fan casing. Clean the cooling fins on
the cylinder, the fan and the rotating protective
grille (fig. 24 - 25). Clean more frequently if mow­ing dry grass.

BATTERY

The battery is a valve-regulated battery with 12 V
nominal voltage. The battery is completely main­tenance free. You don’t have to check or top up the
electrolyte level.

On delivery, the battery is in the accessories box.

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The battery must be fully charged be­fore being used for the first time. The
battery should always be stored fully
charged. If the battery is stored while
totally flat it could sustain permanent
damage.

If the machine is not going to be used for an ex­tended period (more than 1 month), the battery
should be charged, disconnected and then stored in
a cool, safe place. Charge the battery completely
before reinstalling.

The battery can be charged in two ways:

1. Via a battery charger (recommended). This must
be a charger with constant voltage. The battery
can be damaged if a standard type battery
charger (for acid batteries) is used.
Stigarecommends battery charger with item no.
1136-0602-01 which may be ordered by an au­thorised dealer.

2. You can also allow the engine to charge the bat­tery. In this case it is very important, above all
when startingthe machine for the first time and
when it has not been used for a long time, to al­low the engine to run continuously for at least
45 minutes.

Do not short circuit the battery’s termi­nals. Sparks occur which can result in
fire.Do not wear metaljewellerywhich
can come into contact with the battery
terminals.

In the event of dam age to the battery
casing, cover, terminals or interference
to the strip covering the valves, the bat­tery should be replaced.

If the batteryterminalsare coated with oxide, they
shouldbecleaned.Clean the batteryterminalswith
a wire brush and grease them.

LUBRICATION

The machine’s articulated steering joint has four
grease nipples that should be lubricated with uni­versal grease after every 25hours of operation (fig.

26).

Note: The fourth grease nipple is not shown on the
picture. It is located on the underside, on the flexi­ble axle’s front bearing.

Senator-President-Royal:
Lubricate the steering chain with chain spray a
couple of times per season.

Pro16-Pro20:
Lubricate the steering chains with chain spray a
couple of times per season. If the steering chains
are really dirty,dismantle them, wash them and
then grease them once more.

Senator-President-Royal:
The front wheel hub has grease nipples that should
be lubricated after every 50 hours of operation (fig.

30).
Applyuniversalgrease to all the plasticbearingsa

couple of times per season.
Apply a coating of engine oil to the tension arm

joints a couple of times each season.
Apply a few drops of engine oil to both ends of the

throttle control cables a couple of times a season.
Senator:

The transmission is filled with oil (SAE 80W-90)
on delivery from the factory. If it is not opened
(which may only be performed by a specialist), no
topping up of oil should normally be carried out.

President - Royal - Pro16 - Pro20):
The hydrostatic transmission is filled with oil
(10W-40)on delivery from the factory.Unless it is
opened (only to be performed by a specialist), and
provided no leakage occurs, no topping up with oil
should normally be carried out. Transmission oil
does not normally need to be changed.

STEERING CABLES
(Senator - President - Royal)

The steering cables should be adjusted for the first
time after the machine has been in operation for 2

- 3 hours, and then after every 25 hours of opera­tion.

Put the machine in the straight-ahead position.
Tension the steering cables by tightening the nuts

that are located on the underside of the articulated
steering joint (fig. 27). The screws in the ends of
the cables should be held firmly during adjustment
sothat the cables are not twisted.Use an adjustable
wrench or similar for this purpose, inserting it in
the key handles in the ends of the screws. Tension
until all play is removed.

Adjust both the nuts the same amount to ensure
that the alignment of the steering wheel is not
changed.

Once the adjustment is complete, turn the steering
wheel as far as it will go in either direction. Check

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that the chain does not come into contact with the
pulley, and that the cables do not become entan­gled with the steering pinions.

Do not tension the steering cables too hard. Other­wise the steering will be heavy and wear and tear
on the cables will increase.

STEERING CHAINS (Pro16 - Pro20)

The steering chains should be adjusted for the first
time after the machine has been in operation for 2

- 3 hours, and then after every 50 hours of opera-

tion.
Put the ma chine in the straig ht-ahead position.
Tension the steering chains by tightening up the

nuts that are located on the underside of the articu­lated steering joint (fig. 27). Tension until all play
is removed.

Adjust both the nuts the same amount to ensure
that the alignment of the steering wheel is not
changed.

Do not over-tighten the steering chains. This will
cause the steering to become heavy and will in­crease wear on the steering chains.

PATENT - DESIGN

REGISTRATION

Thismachine or parts thereof is coveredby the fol­lowing patent and design registration:

9900627-2 (SE), SE00/00250 (PCT), 9901091-0
(SE), SE00/00577 (PCT), 9901730-3 (SE), SE00/
00895 (PCT), 9401745-6 (SE), SE95/00525
(PCT), 595 7497 (US), 95920332.4 (EPC).

99 1095 (SE), 499 11 740.9 (DE), M1990 000734
(IT), 577 251-253 (FR), 115325 (US).

GGP reserves the right to make alterations to the product
without prior notification.

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MOWING AHEAD

BOX 1006 · SE-573 28 TRANÅS

www.stiga.com