Husqvarna Rider 11 Instruction manual

101 90 98-26
Rider 11, Rider 13 H,
Rider 11 Bio, Rider 13 H Bio,
Rider 14 Pro, Rider 16 H
Workshop Manual

62– English

English – 1
Safety regulations ...............................................2
General instructions .........................................2
Special instructions ..........................................2
Special tools ........................................................3
Technical data .....................................................4
Dimensions ......................................................4
Engine..............................................................4
Gear box ..........................................................4
Transmission....................................................4
Play ..................................................................4
Tightening moments.........................................4
Mowing deck ....................................................5
Control points...................................................5
Delivery and dealer service................................6
Maintenance schedule........................................8
Delivery measures ............................................10
Refilling battery acid..................................10
Fastening steering wheel ..........................10
Fastening seat ..........................................10
Fastening support wheels .........................10
Design and function.......................................... 11
General .......................................................... 11
Engine............................................................12
Steering..........................................................13
Driving............................................................14
Mowing deck ..................................................15
Reparation instructions....................................16
Removing engine ...........................................16
Replacing engine ...........................................18
Changing engine oil .......................................21
Checking and adjusting steering wires ..........21
Replacing steering wires................................22
Removal/installation of steering axle .............22
Removal/installation of wire wheel.................23
Checking and adjusting brake wire ................24
Checking and adjusting gear control..............25
Checking and adjusting throttle control..........26
Checking and adjusting freewheel clutch.......26
Replacing articulated steering bearing...........27
Removal of swing axle ...................................28
Replacing bushings........................................29
Installation of swing axle ................................29
Removal/installation of gear box....................30
Removal/installation of hydrostatic
transmission...................................................31
Replacing hydrostat. trans. axle seals ...........33
Input axle ..................................................33
Outgoing axles ..........................................34
Replacing hydrostatic transmission wire........35
Hydrostatic transmission brake......................40
Removal of brake......................................40
Installation of brake...................................40
Adjustment of brake ..................................41
Bleeding hydrostatic transmission oil system 42
Adjustment of transmission neutral position ..42
Transmission maintenance ............................43
Removal of belt ..............................................44
Checking and adjusting cutting unit ground
pressure .........................................................45
Checking and adjusting parallelism of the
mowing deck ..................................................45
Adjusting cutting height area..........................47
Adjusting cutting height..................................47
Removal of mowing deck...............................48
Replacing cutting unit belts ............................51
Belt replacement on Bio-unit.....................51
Belt replacement on mowing deck with
side- or rear discharge ..............................53
Removal of blades with bearings ...................53
Grinding and balancing of blades ..................55
Pulse air valve intake filter .............................55
Troubleshooting chart ......................................56
Electrical system...............................................57
Circuit diagram Rider 11/11 Bio......................57
Circuit diagram Rider 13 H/13 H Bio/16 H .....58
Circuit diagram Rider 14 Pro..........................59
Workshop manual
Rider 11, Rider 13 H
Rider 11 Bio, Rider 13 H Bio
Rider 14 Pro, Rider 16 H
Contents

2– English
Safety regulations
General instructions
The workshop handbook is written for personnel who
are assumed to have general ride-on mower repara-
tion and service know-how.
The workshop where the ride-on mower is repaired
should be equipped with safety devices in
accordance with local regulations.
No-one should attempt to repair the ride-on mower
without having first read and understood the contents
of this handbook.
The machine is tested for safety and approved only
for equipment supplied or recommended by the
manufacturer.
The below-mentioned boxes are included in this
workshop handbook, as is appropriate.
Special instructions
The fuel used in the ride-on mower has the
following hazardous characteristics:
• Toxic fluid and fumes
• Can cause eye and skin complaints
• Can cause breathing difficulties
• Highly flammable
When using compressed air, do not direct the
compressed air stream towards your, or anybody
else's, body. Air can be forced into the blood
stream, thereby constituting a danger to life .
Use hearing protectors when test driving.
After test driving, do not touch the silencer before it
has cooled down. Risk of burn injuries. This
especially applies if the ride-on mower is equipped
with a catalytic converter. If consumed, the lining on
and in the catalytic converter element is dangerous
to health. Use protective gloves when working with
the catalytic converter/silencer.
The blades are sharp and can cause cutting
injuries. Always use protective gloves when you are
handling the blades.
Use protective glasses when working with the
mowing deck. If the belt's tension spring comes off
and flies upwards, this can cause injury to persons.
Be extra careful when handling battery acid. Spilling
acid on the skin can cause severe burn injuries. If
acid is spilt on the skin, rinse immediately with
water. If acid gets into the eyes, this can cause
blindness. Contact a doctor.
Be careful with the maintenance of the battery.
Explosive gas is formed in the battery. Never
handle the battery when smoking or in the vicinity of
naked flames or sparks. Otherwise, the battery can
explode and cause severe injuries.
IMPORTANT INFORMATION
This box indicates a risk of damage to the
material if the instructions are not
followed.
WARNING!
The warning box indicates a
risk of injury to persons if the
instructions are not followed.
!

English – 3
Special tools
The following special tools are used when working on the ride-on mower.
506 56 76-01 Ball-ended Allen key 5/16" to unscrew the engine pulley socket head cap screw (Kawazaki).
506 57 00-01 Wheel puller for Rider 11/11 Bio, Rider 13 H/13 H Bio and Rider 16 H.
506 66 48-01 Puller for engine pulley.
506 79 06-01 Ball-ended Allen key 3/8" to unscrew the engine pulley socket head cap screw (Briggs &
Stratton).
506 89 92-01 Holder-on for engine pulley removal.
506 89 93-01 Tool for removing steer return spring.
506 66 48-01 506 79 06-01506 57 00-01 506 89 92-01506 56 76-01 506 89 93-01

4– English
Technical data
Tightening moments
Carrier steering 5–10 Nm
Pulley steering wire 20–30 Nm
Belt wheel 35–40 Nm
Blades 45–50 Nm
Blade bearings 20–25 Nm
Belt tensioner wheel 15–25 Nm
Holder screws, engine 20–25 Nm
Holder screws, gear box 20–25 Nm
Brake drum bolts hydrostatic transmission 27 Nm
Engine pulley 70–80 Nm
Wheel axle nut 100–150 Nm
Dimensions: Rider 11/11 Bio Rider 13 H/13 H Bio
Length 2 090 mm 2 150 mm
Width 880 mm 880 mm
Height (over steering wheel) 1 070 mm 1 070 m
Weight 197 kg 197 kg
Track front 720 mm 720 mm
Track rear 620 mm 630 mm
Wheel base 860 mm 850 mm
Tyre size 16 x 6.50 x 8 16 x 6.50 x 8
Air pressure 60 kPa 60 kPa
Max. gradient 15° 15°
Engine: Rider 11/11 Bio Rider 13 H/13 H Bio
Manufacture Briggs & Stratton Briggs & Stratton
model 28N707 model 286707
Power 7,7/10,5 kW/hp 9,2/12,5 kW/hp
Displacement 362 cm3465 cm3
Fuel min. 85 octane unleaded min. 85 octane unleaded
Tank capacity 7 litres 7 litres
Oil SAE 30 or SAE 10W/30 SAE 30 or SAE 10W/30
class CD–F class CD–SF
Oil capacity 1,4 litres 1,4 litres
Start Electric start Electric start
Gearbox: Rider 11/11 Bio Rider 13 H/13 H Bio
Manufacture Peerless MST 205 Tuff Torq K55
Oil SAE 10W/30
class CD-SF
Oil capacity 2,2 litres
Gears, forwards 5
Gears, reverse 1
Electrical system Rider 11/11 Bio Rider 13 H/13 H Bio
Type 12 V, negative earth 12 V, negative earth
Battery 12 V, 24Ah 12 V, 24Ah
Spark plug Champion CJ8 or J8 Champion CJ8 or J8
Spark plug gap 0,7 - 0,8 mm 0,7 - 0,8 mm
Play
Clutch wire: 8–10 mm
Brake control lever against stop bolt: 0–1 mm
Brake control lever: 7–9 mm
Brake wire hydrostatic transmission: 0 mm

English – 5
Technical data
Control points
Mowing deck parallelism with cutting height in pos. 1: ± 2 mm
Cutting height control in pos. 1: Rider 11= 37 ± 2 mm
Bio = 45 ± 2 mm
Other = 40 ± 2 mm
Synchronous transmission belt tension Bio 103 at 10 N force, impression: 7 mm
Synchronous transmission belt tension Bio 90 at 7 N force, impression: 8 mm
Dist. between support plate and drive belt: 3–6 mm
Distance belt tensioner control lever
and belt guide, disengaged unit: 17 ± 5 mm
Dimensions: Rider 14 Pro Rider 16 H
Length 2 120 mm 2 080 mm
Width 880 mm 880 mm
Height (over steering wheel) 1 070 mm 1 070 mm
Weight 234 kg 210 kg
Track front 720 mm 720 mm
Track rear 640 mm 630 mm
Wheel base 860 mm 860 mm
Tyre size 16 x 7.50 x 8 18 x 6.50 x 8
Air pressure 60 kPa 60 kPa
Max. gradient 15° 15°
Engine: Rider 14 Pro Rider 16 H
Manufacture Briggs & Stratton Briggs & Stratton
Vanguard V-Twin model 28N707
model 294777
Power 12/14 kW/hp 11,4/15,5 kW/hp
Displacement 480 cm3465 cm3
Fuel min 85 octane unleaded min 85 octane unleaded
Tank capacity 7 litres 7 litres
Oil SAE 30 or 10W/30 SAE 30 or 10W/30
class CD-CF class CD-CF
Oil capacity 1,5 litres 1,2 litres
Start Electric start Electric start
Gearbox: Rider 14 Pro Rider 16 H
Manufacture Tuff Torq K 61 Tuff Torq K 55
Oil SAE 10W/30 SAE 10W/30
class CD-CF class CD-CF
Oil capacity 3,3 litres 2,2 litres
Electrical system Rider 14 Pro Rider 16 H
Type 12 V, negative earth 12 V, negative earth
Battery 12 V, 24 Ah 12 V, 24 Ah
Spark plug Champion RC12YC Champion CJ8 or J8
Spark plug gap 0,7 - 0,8 mm 0,7 - 0,8 mm
Mowing deck: Rear ejector 85 Rear ejector 97 Rear ejector 120 Bio 90 Bio 103
Cutting width 850 mm 970 mm 1 200 mm 900 mm 1 030 mm
Cutting height 40-90 mm 40-90 mm 40-90 mm 45-95 mm 45-95 mm
Blade length 350 mm 440 mm 440 mm 410 mm
Noise level 100 dB(A) 100 dB(A) 100 dB(A) 100 dB(A) 100 dB(A)
Weight 28,0 kg 40,0 kg 60,2 kg 38,0 kg 44,0 kg
Overall width 950 mm 1 075 mm 1 305 mm 1 000 mm 1 115 mm

6– English
Delivery and dealer service
Pre-delivery service
1. Top up battery with acid and recharge for four hours.
2. Fit steering wheel, seat and any optional equipment.
3. Fit cutting unit.
4. Adjust cutting unit:
Adjust lift springs (effective weight of cutting unit should be
12–15 kg, or set to maximum lift if brush is to be fitted).
Adjust cutting unit so that rear edge is about 2–4 mm higher than front edge.
Adjust cutting unit height setting so that cutting height limit is 5 mm above the frame of the unit at the
lowest cutting height.
5. Check that engine has correct amount of oil.
6. Check and adjust tyre pressure (60 kPa, 0.6 bar).
7. Connect battery.
8. Fill with fuel and start engine.
9. Check that machine does not move in neutral.
10. Check:
Forward drive.
Reverse drive.
Operation of blades.
Seat safety switch.
Lift lever safety switch.
Parking brake safety switch.
11. Check engine revs 3,000–3,100 rpm.
12. Tell customer about:
Need and benefits of following the service schedule.
Need and benefits of having machine serviced every 300 hours.
Servicing and the influence of this journal on the second-hand value of the machine.
Range of applications for BioClip.
13. Complete proof of sale, etc.
After first 5 hours
1. Change engine oil.

English – 7
25 hour service
1. Change engine oil (50 hours).
(25 hours if operating conditions severe).
2. Clean/replace air pre-filter or oil-foam element
if fitted (25 hours).
(more regularly in dusty working conditions)
3. Clean/replace air filter cartridge (25 hours, 100
hours if pre-filter fitted).
(more regularly in dusty working conditions)
4. Clean engine cooling air intake.
50 hour service
1. Change engine oil.
2. Clean/replace air pre-filter or oil-foam element
if fitted.
3. Clean/replace air filter cartridge (25 hours, 100
hours if pre-filter fitted)
(more regularly in dusty working conditions)
4. Clean engine cooling air intake.
5. Check/adjust cutting height setting.
6. Check/adjust parking brake.
7. Inspect flame guard/spark arrestor (optional
equipment)
100 hour service
1. Change engine oil.
2. Clean/replace air pre-filter or oil-foam element
if fitted.
3. Clean/replace air filter cartridge (25 hours, 100
hours if pre-filter fitted).
(more regularly in dusty working conditions)
4. Check/adjust cutting height setting.
5. Check/adjust parking brake.
6. Inspect flame guard/spark arrestor (optional
equipment)
7. Replace engine oil filter.
8. Clean/replace spark plug.
9. Replace fuel filter in fuel line.
10. Clean pulse-air filter.
11. Clean cooling system.
12. Check engine valve clearance.
300 hour service
1. Change engine oil.
2. Replace air filter (pre-filter).
3. Replace air filter (paper).
4. Check/adjust cutting height setting.
5. Check/adjust parking brake.
6. Inspect flame guard/spark arrestor (optional
equipment)
7. Replace engine oil filter.
8. Clean/replace spark plug.
9. Replace fuel filter in fuel line.
10. Clean pulse-air filter.
11. Clean cooling system.
12. Check engine valve clearance.
13. Carry out 300 hour service at authorised dealer.
At least once a season
1. Change engine oil (50 hours).
(25 hours in severe operating conditions).
2. Clean/replace air pre-filter or oil-foam element if
fitted (25 hours).
(more regularly in dusty working conditions)
3. Clean/replace air filter cartridge (25 hours, 100
hours if pre-filter fitted).
(more regularly in dusty working conditions)
4. Check/adjust cutting height setting.
5. Check/adjust parking brake.
6. Inspect flame guard/spark arrestor, optional
equipment
(50 hours).
7. Replace engine oil filter (100 hours).
8. Clean/replace spark plug (100 hours).
9. Replace fuel filter in fuel line (100 hours).
10. Clean pulse-air filter.
11. Clean cooling system (100 hours).
(more regularly in dusty working conditions)
12. Check engine valve clearance (100 hours).
13. Carry out 300 hour service at authorised dealer.
Delivery and dealer service

8– English
Maintenance schedule
Maintenance interval in
hours
Daily main-
tenance
before after
Weekly3)
main-
tenance
At least
once a
year
Check for fuel and oil leakage - ❍
Check the parking brake 23 ●
Check the engine oil level (when you
refuel) 20 ●
Check the fuel pump air filter 21 ●
Check the seat safety switch 23 ●
Check the lift lever safety switch 23 ●
Check the parking brake safety switch 23 ●
Check/clean the engine cooling air intake 20 ●
Check the cutting unit: 27 ●
• blades are secure 29 ●
• condition of blades (sharpness,
shape, etc.) 29 ●
• blade synchronisation (90° between
BioClip) 29 ●
Check steering wires (for play, etc.) 22 ●
Check fasteners (screws, nuts, etc.) - ❍
Start engine and blades, listen for noise - ❍
Clean underside of cutting unit 29 ●
Clean transmission air intake 21 ●
Check battery acid level 23 ●
Check transmission oil level 21 ●
Check condition of V-belts, pulleys, etc. - ❍
Check for damage - ❍
Check tyre pressures (60 kPa) 39 ●
Check for damage to wire guide at
articulated joint - ❍
Clean thoroughly around engine - ❍
Clean air filter (pre-filter) 24 ●
Clean thoroughly around transmission - ❍
Clean all belts, pulleys, etc. - ❍
Lubricate pivot (nipple) 37 ●
Lubricate belt tensioner (nipple) 37 ●
Lubricate triangle link (nipple) 37 ●
Lubricate seat suspension - ❍
Lubricate all wires 37 ●
Lubricate safety lock on cutting unit 28 ●
Lubricate inner stud on cutting unit 28 ●
Lubricate slot for cutting unit tool frame 28 ●
Lubricate bearing surfaces on cutting unit 28 ●
Clean inside frame tunnel - ❍
Lubricate pedal mechanism inside frame
tunnel - ❍
25 50 100 300
PageMaintenance
The following is a list of the maintenance which should be conducted on the machine. Most of the points that
are not covered by this workshop manual are covered by the operator’s manual.

English – 9
1) First change after 5 hours.2)When driving with a heavy load or when the ambient temperature is high, replace every 25 hours. Clean
every 25 hours if pre-filter is not fitted. Clean and replace the filter more often in dusty conditions. 3) For daily use of the machine
lubrication should be conducted twice a week. 4) Conducted by authorised service workshop.
!WARNING!
No service procedures must be conducted on the engine or cutting unit unless:
●= Covered by this workshop manual.
❍= Not covered by this workshop manual.
Maintenance interval in
hours
Daily main-
tenance
before after
Weekly3)
main-
tenance
At least
once a
year 25 50 100 300
PageMaintenance
Lubricate throttle control - ❍
Lubricate choke control - ❍
Smörj styrkedja i ramtunnel. - ❍
Lubricate steering chain inside frame
tunnel - ❍
Clean engine cooling air intake 20 ●●
Clean pre-filter or oil-foam element,
if fitted 24 ●●
Clean air filter cartridge2) 24 ●● ●
Change engine oil1) 36 ●●
Check/adjust cutting height setting 27 ●●
Check/adjust parking brake 23 ●●
Inspect flame guard/spark arrestor
(optional equipment) - ❍❍
Replace engine oil filter 37 ●●
Clean/replace spark plugs - ❍❍
Replace fuel filter in pipe 39 ●●
Clean pulse-air filter 39 ●●
Clean cooling system - ❍❍
Check engine valve clearance4) -❍❍
Replace air filter (pre-filter)2) 24 ●●
Replace air filter (paper filter)2) 24 ●●
Carry out 300 hour service4) -❍❍
• The engine is switched off.
• The ignition key is removed.
• The ignition cables are removed
from the plugs.
• The parking brake is applied.
• The cutting unit is disengaged.
Maintenance schedule

10– English
!
Refilling battery acid
The battery is delivered dry from the factory.
• Slowly fill the battery acid up to the mark on the
battery.
• Wait 20 minutes and fill, as is required, with more
battery acid.
• Charge the battery (12 V, 6 A) for four hours.
• Check the level of acid and fill, as is required,
with distilled water up to the correct level.
WARNING!
The battery acid is highly corrosive. Use
rubber gloves and protective glasses. Avoid
breathing in the acid fumes.
Measures for contact with acid
External: Rinse thoroughly with water.
Internal: Drink large quantities of water or
milk. Contact a doctor as soon as
possible.
Eyes: Rinse thoroughly with water.
Contact a doctor as soon asap.
The battery gives off explosive gas. Sparks,
naked flames and cigarettes must absolutely
not be in the near vicinity of the battery.
• Fasten the steering wheel with steering column
on the steering shaft.
• Tighten the socket head cap screw, make sure
that it sits in its groove on the steering shaft.
• Securely lock the socket head cap screw with the
locking nut.
Fastening steering wheel
Insert the seat pin through the hole in the frame and
seat attachment and fasten spring pin.
Fastening seat
Fastening support wheels
Fasten the support wheels with axles, spacers and
nuts in the support wheels holder.
Delivery measures

English – 11
Design and function
General
Husqvarna Riders is a series of ride-on mowers
with a large capacity. There are six sizes, from the
smallest Rider 11 to the largest Rider 20 ProFlex.
This manual refers mainly to the smaller machines;
the larger ProFlex machines are covered by a
separate manual. All Riders have articulated
steering in order to easily cut around trees and
other obstacles. Moreover, they all have front-
mounted mowing decks for controlled cutting and
for best possible cutting results.
Husqvarna Riders can, moreover, be equipped
with various accessories such as moss rake and
dozer blade which make them flexible working
tools throughout the year.
Rider 11 and Rider 11 Bio can be delivered with a
manual gearbox, while the other models are only
available with hydrostatic transmission.
Rider 11 and Rider 13 H have a mowing deck with
rear ejection. They can also be ordered with a Bio
deck, in which case they are called the Rider 11 Bio
or Rider 13 H Bio.
Rider 14 Pro can be delivered with four different
mowing decks.
Bak 97 (rear ejection)
Sido 97 (side ejection)
Bio 90 or Bio 103
Rider 16 H can be delivered with four different
mowing decks.
Bak 97 (rear ejection)
Sido 97 (side ejection)
Bio 90 or Bio 103
RIDER850
RIDER
850
RIDER850
RIDER 850
RIDER
850
RIDER 850

12– English
Design and function
Engine
All Husqvarna Riders have engines from Briggs &
Stratton. The Rider 11/11 Bio, Rider 13 H/13 H bio
and Rider 16 H have single-cylinder engines, while
the Rider 14 Pro has a twin-cylinder engine. Both
the single and two-cylinder engines are air cooled.
More intricate engine repairs are not described in
this workshop handbook, these can instead be read
in Briggs & Stratton's own handbooks which contain
detailed information about adjusting and repairing
the engines. The handbooks can be ordered from
an authorized service workshop.
Rider 11/11 Bio and Rider 13 H/13 H Bio have a
single-cylinder side valve engine with spray
lubrication with power outputs of 10.5 and 12.5 hp
respectively.
Rider 16 H has a 15.5 hp single-cylinder overhead
valve engine.
The Rider 14 Pro has a twin-cylinder overhead
valve engine with pressure lubrication and a
separate oil filter. This engine is equipped with a
catalytic converter that reduces emissions of
hydrocarbons and nitrogen oxides by up to 65%
and reduces carbon dioxide by up to 45%.
The order numbers for the respective Rider models
are found in the table below. Please state these
when ordering manuals:
Model B & S model no.
Rider 11/11 Bio 28B707
Rider 13 H/13 H Bio 286707
Rider 14 Pro 294777
Rider 16 H 28N707
It is important that only original spare parts are
used when repairing the engines. If other parts are
used, the guarantee shall no longer be valid.

English – 13
Design and function
Steering
All the ride-on mowers in Husqvarna's Rider-series
have articulated steering. The steering force from
the steering wheel is transferred to the rear section
via wires and a chain. This ensures that the ride-on
mower is easy to manoeuvre, as well as having
high-precision steering. A Rider easily cuts around
all obstacles that may be found on the lawn.
Thanks to the articulated steering, the turning
radius is extremely small, the uncut circle when the
steering wheel is fully turned is just 20–30 cm
depending on which model is chosen.
Outline diagram of the articulated steering function.
Rider machines have a sliding bearing (1) on the
steering column.

14– English
Design and function
Driving
Rider 13 H/13 H Bio, Rider 16 H, Rider 14 Pro are
equipped with hydrostatic transmission which
provides the driver complete control. Continuously
variable speed control, forwards and reverse, is by
means of a foot pedal.
Rider 11 and Rider 11 Bio have a manual gear box
with five forward gears, neutral and one reverse
gear. This gear box is an "inline" type, which means
that you can change from neutral to fifth gear
without having to go through all the other gears.
Manual gear box on Rider 11 and Rider 11 Bio. Hydrostatic transmission on Rider 14 Pro.
Hydrostatic transmission on Rider 13 H, Rider 13 H
Bio and Rider 16 H.

English – 15
Mowing deck
The entire Rider series is equipped with front-
mounted mowing decks to ensure effective cutting
even in confined areas.
Rider 11 and Rider 13 H have a mowing deck with
rear ejection and a cutting width of 850 mm.
Rider 11 Bio and Rider 13 H Bio have a Bio deck
with a cutting width of 900 mm.
The remaining Rider machines can be delivered
with a choice of mowing decks, with rear ejection,
side ejection or Bio.
Design and function
Mowing deck with rear ejection, 850 mm.
Bio 90
Bio 103
Mowing deck with side ejection.
Mowing deck with rear ejection

16– English
Reparation instructions
Removing engine
3
1
24
Remove the battery's fixing belt. Remove the safety
guard and remove the cable connections. Then, lift
out the battery.
Remove the cable which leads from the starter
relay to the start motor.
Mark up and remove the engine's electrical
connections.
Remove the clamps which hold the throttle and
choke wires. Unhook the wires from their
attachment in the carburettor.
Rider 11/11 Bio, Rider 13 H/13 H Bio and Rider
16 H have just one wire which controls both the
throttle and the choke.

English – 17
Reparation instructions
6
57
Remove the fuel line hose clamp from the fuel
pump and pull the fuel line downwards.
Remove the cover plate over the silencer (two
screws on either side of the silencer) and lift out the
plate.
Remove the exhaust pipe clamps and the silencer’s
four retaining bolts. Then remove the silencer,
exhaust pipe and the accompanying pulse air valve.
On Rider 11/11 Bio, Rider 13 H/13 H Bio and
Rider 16 H the exhaust pipe is removed without
removing the silencer.
8
Clamp together the wire holder under the engine
pulley with a pair of flat pliers and pull the wire
holder downwards.

18– English
Reparation instructions
10
Remove the engine attachments, two on each side
of the engine, and remove the engine from the
mower.
Insert tool no. 506 79 06-01 into the centre of the
engine pulley. Unscrew and remove the socket
head cap screw which holds the pulley and the
engine axle together. Use tool no. 506 89 92-01 as
a holder-on. Remove the pulley from the engine
axle.
IMPORTANT INFORMATION
When installing the engine, it is important
that the pulley groove (1) is in a position so
the outgoing axle key (2) fits into the groove
(see diagram). Also check that both spacing
collars (3) and the key (2) are firmly attached
on the engine axle. Grease the engine axle.
Replacing engine
9
1
Lower the engine and tighten the engine
attachments (two on each side of the engine) with
moment (25 Nm).