Jonsered FR 2312 M Instruction manual

English
Workshop manual
FR2312M, FR2312MA

2 – English
Table of contents
1 Safety instructions ........................................... 3
1.1 General directions..........................................................3
1.2 Special directions...........................................................3
2 Special tools ..................................................... 4
3 Technical data................................................... 5
3.1 Dealer Service................................................................7
3.2 Service Schedule ...........................................................8
4 Delivery measures............................................ 9
4.1 To our dealers ................................................................9
4.1.1 Packaging and unpacking.....................................9
4.1.2 Parts packed with the product ..............................9
4.2 Battery..........................................................................10
4.3 Connecting the jump leads...........................................10
4.4 Steering Wheel.............................................................11
4.5 Checking the engine’s oil level.....................................11
4.6 Wheels .........................................................................12
5 Design and function....................................... 13
5.1 General ........................................................................13
5.2 Serial numbers.............................................................14
5.3 Engine..........................................................................14
5.4 Steering........................................................................15
5.7 Drive.............................................................................16
5.8 Cutting unit...................................................................16
6 Repair instructions......................................... 17
6.1 Dismount the engine ....................................................17
6.2 Fuel tank ......................................................................20
6.2.1 Removal..............................................................20
6.2.2 Assembly ............................................................20
6.3 Changing engine oil .....................................................21
6.4 Checking and adjusting the steering cables.................21
6.5 Replacing the Steering Cables.....................................22
6.6 Removing/Fitting the Steering Shaft ............................23
6.7 Removing/assembling the cable pulley........................24
6.8 Checking and adjusting the brake cable ......................25
6.9 Checking and adjusting the clutch ...............................25
6.10 Checking and adjusting the accelerator.....................26
6.11 Changing articulated steering bearing........................26
6.12 Removing the pivoting rear axle.................................29
6.13 Replacing the pendulum shaft bushings ....................30
6.14 Replacing the bearings in the articulation unit belt pul-
leys.....................................................................................30
6.15 Assembling the pivoting rear axle ..............................31
6.16 Replacing the hydrostatic cable .................................32
6.16.1 Removing the hydrostatic cable........................32
6.17 Replacing brake cable................................................35
6.17.1 Removing the brake cable ................................35
6.17.2 Fitting the brake cable ......................................35
6.18 Replacing belt 4, as far as the cutting unit .................36
6.19 Replacing belt 3, cutting unit drive .............................37
6.20 Removing the cutting unit...........................................39
6.21 Service position for cutting unit ..................................40
6.22 Removal of blades and blade housing.......................41
6.23 Grinding and Balancing Blades..................................42
7 Electrical System............................................ 43
7.1 Wiring diagram.............................................................43
7.2 Electrical system components......................................44
7.2.1 Microswitch seat .................................................44
7.2.2 Microswitch cutting unit.......................................44
7.2.3 Microswitch pedal carrier ....................................44
7.3 Ignition and starter switch ............................................45
7.4 Main fuse......................................................................45

English – 3
1 Safety instructions
1.1 General directions
This workshop manual is written for personnel with a
general knowledge of repairing and servicing Rides.
The workshop where the Rider is to be repaired must
be equipped with safety devices in accordance with
local bylaws.
No one may repair the product without rst reading
and understanding the content of this workshop
manual.
This machine has been tested and approved only
together with the equipment supplied or
recommended by the manufacturer.
This Workshop Manual contains the following
warning boxes in relevant places.
WARNING!
The warning box warns of the
risk of personal injury if the
instructions are not followed.
IMPORTANT INFORMATION
This box warns of material damage if the
instructions are not followed.
1.2 Special directions
The fuel used in the product has the following
hazardous properties:
• The uid and its vapor are toxic.
•Can cause eye and skin irritation.
•Can cause respiratory problems.
• Highly ammable.
When using compressed air, do not direct the air jet
toward your body. Air can penetrate into the blood
circulation, which means mortal danger.
Use eye protection when working on tensioned
springs.
Use ear protection during testing.
Introduction and safety regulations
During testing, do not touch the mu󰀪er before it has
cooled down. Risk of burns. This is especially true if
the product is equipped with a catalytic converter. The
lining on and in the catalytic converter element is toxic
for consumption. Use protective gloves when working
on the catalytic converter/mu󰀪er.
The blades are sharp and can give cut injuries. Use
protective gloves when handling the blades.
Use eye protection when working on the cutting unit.
The belt tensioning spring can break, y o󰀨 and could
cause personal injury.
Use eye protection while you are working with the
battery. Take care when handling battery acid. Acid
on skin can cause serious burns. In the event of
spillage on the skin, wash immediately with water.
Acid in eyes can result in blindness, seek medical aid.
Be careful when servicing the battery. Explosive
gases are formed in the battery. Never carry out
service on the battery while smoking or in the vicinity
of naked ames or sparks. The battery can then
explode and cause serious injury.
IMPORTANT INFORMATION
Waste oil and old lters shall be handled
as hazardous waste.

4 – English
2 Special tools
The following special tools are used when working on the product.
Special tools for engine and transmission can be found in the respective workshop manual.
Special tools
1
2
3
4
5
6
7
1Optical tachometer 502 28 80-01
2Tool for measuring wheel
speed
578 92 62-01
3Fork counterhold - belt
pulley
506 89 92-01
4 Punch-kit 535 41 32-01
5Puller - belt pulley 506 66 48-01
6Battery charger (EU) 590 06 82-01
7 Tachometer 502 71 14-01

English – 5
Technical data
3 Technical data
Dimensions
Length without cutting unit, mm/ft 1781/5.84
Length with cutting unit, mm/ft 2100/6.89
Width without cutting unit, mm/ft 797/2.60
Width with cutting unit, mm/ft 883/2.90
Height, mm/ft 1084/3.56
Service weight with cutting unit, kg/lb 191/421
Wheelbase, mm/ft 800/2.62
Tire dimension 155/50-8
Air pressure rear - front, kPa (bar/PSI) 60 (0.6/8.5)
Max. permitted slope 10°
Engine
Make/Model Briggs & Stratton/3115
Rated output, kW (see note 1) 6.4
Stroke, cm3/cu.in 344/21
Max. engine speed, rpm 3000 ± 100
Fuel, minimum octane rating unleaded 85
Volume, fuel tank, liters 4
Oil, grade SJ-CF SAE 10W/30
Oil tank capacity, liters/USqt 1.4/1.5
Start Electric starter
Electrical system
Type 12V, negative ground
Battery 12V, 20 Ah
Spark plug Champion XC92YC
Electrode gap, mm/inch 0.75/0.030
Main Fuse Flat pin, 15 A.
Noise emissions and cutting width
(see note 2)
Noise power level, measured dB(A) 99
Noise power level, guaranteed dB(A) 100
Cutting width, cm/inch 85/33.5
Noise levels
(see note 3)
Noise pressure level at user's ear, dB(A) 85
Vibration levels
(see note 4)
Vibration level in steering wheel, m/s21.6
Vibration level in seat, m/s20.7

6 – English
Technical data
Transmission
Make Tu󰀨 Torq T36P
Oil, grade SF-CC SAE 20W/50
Number of forward gears -
Number of reverse gears -
Forward speed, km/h 0-8
Reverse speed, km/h 0-8
Cutting unit
Type Z 85
Cutting heights, 5 positions, mm/inch 25-70 / 1-2 3/4
Blade length, mm/inch 430/17
Note. 1: The power rating of the engine is the average net output (at the specied rpm) of a typical production engine of the
model, measured to SAE standard J1349/ISO1585. Mass production engines may di󰀨er from this value. The actual power
of the engine mounted in the nal
product depends on operating speed, surroundings and other factors.
Note. 2: Emission of noise to the surroundings measured as sound power (LWA) in accordance with the EU directive
2000/14/EC.
Note. 3: Sound pressure level according to EN 836. Reported data for the noise pressure level has a typical dispersion
(standard deviation) of 1.2 dB(A).
Note. 4: Vibration level according to EN 836. Reported data for the vibration level has a typical dispersion (standard
deviation) of 0.2 m/s2(steering wheel) and 0.8 m/s2(seat).
Tightening torques
Steering cable pulley 57-61 ft/lb (28-32 Nm) 21-24 lbft
Blade belt pulley 57-61 ft/lb (45-50 Nm) 32-36 lbft
Blade 57-61 ft/lb (45-50 Nm) 32-36 lbf
Belt tensioner 57-61 ft/lb (15-25 Nm) 10-18 lbft
Engine mounting screws 57-61 ft/lb (20-25 Nm) 14-18 lbft (M8 8.8 = 24Nm)
Gearbox mounting screws 57-61 ft/lb (20-25 Nm) 14-18 lbft (M8 8.8 = 24Nm)
Engine belt pulley 52 ft/lb (70 Nm) 50 lbft
Play
Clutch wire: 4 - 6 mm (0.16" - 0.23")
Brake lever to stop: 0 - 1 mm (0 - 0.040")
Brake lever: 7 - 9 mm (1/4" - 3/8")
Brake cable: 1 mm (0.040")
Hydrostat pedal wire: 0 mm

English – 7
Service tools
3.1 Dealer Service
8-hour service
1. Change the engine oil.
25-hour service
1. Change engine oil on top valve engine at high
load and temperature.
2. Clean/Replace the air lter’s precleaner (shorter
intervals for dusty operating conditions.)
3. Change the air lter cartridge (25 hrs, 100 hrs
if precleaner tted. Shorter interval in dusty
operating conditions.
3. Check the tire pressures.
4. Check the cutting unit (visual inspection).
5. Lubricate the belt adjuster.
6. Lubricate joints and shafts.
7. Adjust the brake.
8. Check the V-belts.
9. Clean the engine cooling air intake.
10. Check/clean the hydrostatic transmission’s
cooling ns.
50-hour service
1. Perform the 25-hour service as detailed above.
2. Change engine oil.
3. Check the transmission oil level.
4. Check/adjust the parking brake.
5. Check/adjust the throttle cable.
6. Clean the engine and transmission cooling ns.
7. Check/adjust the cutting unit settings.
8. Check the mu󰀪er and its spark arrester.
100-hour service
1. Perform the 25-hour service as detailed above.
2. Perform the 50-hour service as detailed above.
3. Replace the air lter’s prelter and paper lter.
4. Change fuel lter in the line.
5. Clean/change spark plug.
300-hour service
1. Inspect the machine. Reach agreement with the
customer about which additional work should
be carried out.
2. Perform the 25-hour service as detailed above.
3. Perform the 50-hour service as detailed above.
4. Perform the 100-hour service as detailed
above.
5. Check the engine valve clearance.
At least once every season
1. Change engine oil (25/50 hours).
2. Replace the pre-lter in the air lter.
3. Replace the lter cartridge in the air lter.
4. Check/adjust the cutting unit settings.
5. Adjust the parking brake.
6. Inspect the ame proong/spark arrestor.
7. Clean/change spark plug.
8. Change fuel lter in the line.
9. Clean the engine and transmission cooling ns.
10. Check the engine valve clearance.
11. Check the fuel hose. Replace if necessary (this
is done by an authorized servicing dealer)
12. Carry out the 300-hour service at an authorized
servicing dealer.

8 – English
3.2 Service Schedule
The following is a list of maintenance procedures that must be performed on the product. For those points not
described in this workshop manual, refer to the operator’s manual.
Page Daily mainte-
nance before
starting 25 50 100
Check the engine oil level 11 l
Check the engine cooling air intake -t
Check the fuel pump’s air lter -t
Check the steering wires 19 l
Check the brakes 23 l
Check the battery 10 l
Check the safety system -t
Check nuts and bolts -m
Check for any fuel or oil leakage -m
Clean around the mu󰀪er and the engine -m
Change engine oil 1) 19 l1) l1)
Clean the air lter and the prelter 2) -m
Check the cutting unit (visual inspection) -m
Check the air pressure in the tires 12 l
Lubricate the belt adjuster 3) -t
Lubricate joints and shafts 3) -t
Adjust the brakes 23 l
Check the V-belts -m
Check the transmission’s cooling ns -m
Clean the engine’s cooling air intake -t
Checking and adjusting the throttle cable -m
Clean the engine and transmission cooling ns 2,4) -m
Check the mu󰀪er and its spark arrester -m
Check and adjust the settings of the cutting unit -m
Replace the air lter’s prelter and paper lter 2) -t
Change the fuel lter -t
Change spark plug -t
1)First change after 8 hours. Change every 25 hours when under heavy loads and high temperature, otherwise ever 50 hours. 2) In dusty
conditions, cleaning and replacement are required more often. 3) The product should be lubricated twice a week when used on a daily
basis. 4) Performed by an authorized servicing dealer.
l = Described in this workshop manual.
m = Not described in this workshop manual.
t= Described in the operator’s manual
WARNING!
Service procedures must not be conducted on the engine or cutting unit unless:
• The engine has been stopped.
• The ignition key has been removed.
• The ignition cable has been removed from the spark plug.
• The parking brake is engaged.
• The cutting unit has been disengaged.
Technical data

English – 9
4.1.1 Packaging and unpacking
On delivery from the factory, the product is normally
packed in special packing. This comprises a bottom
board of wood with a top of sturdy cardboard, kept
together with plastic lm.
WARNING!
Handle the transport box with care.
Keep the goods as level as possible.
Use long forks when lifting from the
end.
The bottom board has pallet feet and the goods can
be handled with a normal forklift from the side. Two
men should help the truck driver in order to keep the
goods as level as possible. Lift and drive the truck
with care.
Tear o󰀨 the plastic lm and lift o󰀨 the pieces of
cardboard.
The product then stands on the base with the brakes
on and is secured with wooden blocks.
Check for any transport damage on the product once
the packing is open. Report any damage to the carrier
according to normal routines.
Do not return the packing.
Lift from the end, see gure. Long pallet forks will be needed.
4.1.2 Parts packed with the product
The following components are contained in the
transport box:
Quantity Component
1 pc Steering wheel with steering rod
1 pc Pin steering wheel rod
1 pc Operators manual
1 pc Operating and Maintenance
Instructions, Briggs & Stratton
1 pc Seat with attachment details
Delivery measures
4.1 To our dealers
A well-performed delivery service is the rst step to a
functioning aftermarket. It is in everybody’s interest to
have a functioning aftermarket:
• The customer is satised with their product. He/she
knows where to turn to get help if problems should
arise.
• You will have a regular customer who will
recommend you and your business to other
potential customers.
• In this way, we can build our brand together and
take a common responsibility for our products and
customers.
Be thorough with your paperwork.
Complete the warranty and delivery documentation,
etc., and make sure the customer is given the correct
operator’s manual for the machine.
Set up a customer database so that in the future you
can see which machine the customer has, including
all serial numbers. The database will be handy when
ordering spare parts and in future
marketing.
In conjunction with delivery, you should also provide
the customer with the information required to handle
and maintain the machine in a safe manner.
Especially remember to inform the customer of:
• Safety regulations.
• Operating instruments. Putting in the neutral
position (start lock function).
• Checking oil levels. Topping up oil and the type of
oil required.
• First oil change after run-in period.
• The need for and advantages of following the
service schedule and regularly leaving the product
for service.
• What fuel to use.
• Mowing tips for a good result. Application for the Z
85.
• What accessories are available for the type of
product in question.
• Warranty conditions.
• Your business and who the customer should turn to
if problems arise.
4 Delivery measures

10 – English
4.2 Battery
WARNING!
Measures after contact with acid
External:Rinse with plenty of water.
Internal:Drink plenty of water or milk. Seek
medical attention as quickly as possible.
Eyes:Rinse with plenty of water. Seek medical
attention as quickly as possible.
The battery generates explosive gases.
Sparks, ames and cigarettes must not occur
Starting the engine with a weak battery
If the battery is too weak to start the engine, it should
be recharged. Charge the battery with max 3 Amps
for 4 hours.
When the battery is fully charged, connect the red
cable to the positive terminal (+terminal) of the
battery and the black cable to the negative terminal
(-terminal). Ensure that the red (+) cable is routed
behind the black (-) cable.
If jump leads are used for emergency starting, follow
the procedure below:
4.3 Connecting the jump leads
IMPORTANT INFORMATION
Your rider is equipped with a 12-volt
system with negative ground. The other
vehicle must also have a 12-volt system
with negative ground. Do not use your
product battery to start other vehicles.
• Connect each end of the red cable to the
POSITIVE pole (+) on each battery, exercise care
not to short circuit any of the ends against the
chassis.
• Connect one end of the black cable to the
NEGATIVE pole (-) on the fully charged battery.
• Connect the other end of the black cable to a good
CHASSIS EARTH, away from the fuel tank and the
battery.
To remove cables, reverse order
• Remove BLACK cable rst from chassis and then
from the fully charged battery.
• Finally the RED cable from both batteries.
Delivery measures

English – 11
Delivery measures
4.4 Steering Wheel
1 Fit the steering wheel with steering column tube
onto the steering column. Ensure the holes are
aligned.
2 Fix the steering wheel by punching the pin in with
a hammer.
4.5 Checking the engine’s oil level
Check the engine oil level when the product is
standing on a at surface with the engine turned o󰀨.
Raise the engine cover.
Loosen the dipstick, pull it up and wipe it o󰀨.
The dipstick should be completely screwed down.
Pull up the dipstick and check the engine oil.
The oil level should be between the markings on the
dipstick. If the level is approaching the ADD mark,
top up the oil to the FULL mark on the dipstick.
ADD FULL
ADD FULL
Fill oil into the same hole as the dipstick.
Fill slowly with oil. Tighten the dipstick properly
before starting the engine. Start and run the engine
at idling speed for around 30 seconds. Turn o󰀨 the
engine. Wait 30 seconds and then check the oil
level. If necessary ll so that the oil comes up to the
FULL mark on the dipstick.
First and foremost use synthetic engine oil class
SJ-CF 5W/30 or 10W/30 for all temperature ranges.
Mineral oil SAE30, class SF–CC can be used at
temperatures > +5 °C (40 °F)
Do not mix di󰀨erent oil types.

12 – English
4.6 Wheels
The tire pressure should be 60 kPa (0.6 bar /
8.5 PSI) on all wheels.
IMPORTANT INFORMATION
Di󰀨erent pressures in the front wheels will
make the blades cut the grass at di󰀨erent
heights.
Delivery measures

English – 13
5 Design and function
5.1 General
The product have articulated steering for easy mowing around trees and other obstacles. It also have a front-
mounted cutting unit for controlled mowing and the best possible cutting results.
The product is also equipped with accessories such as lawn rake and snow blade, making them exible tools
for all-year-round use.
The product is delivered with hydrostatic transmission.
The product is equipped with a cutting unit with two blades.
Design and Function

14 – English
5.2 Serial numbers
The machine’s serial number can be found on the
printed plate (1) attached to the right below the
engine cover. Stated on the plate, from the left, are:
• The machine’s type designation (Model).
• The manufacturer’s type number (PNC).
• The machine’s serial number (Serial Number)
Please provide the type designation and serial
number when ordering spare parts.
The engine’s serial number is given on a bar code
decal (2). It is placed on the top of the engine.
The text gives:
• Engine model
• Serial number
• Date of manufacture
Please provide the engine model and serial number
when ordering spare parts.
The transmission’s serial number is found on the bar
code decal located on the front of the housing for the
left-hand drive shaft.
Keep the information on the decal close at hand when
ordering spare parts.
5.3 Engine
The product have a one-cylinder, air cooled engine
from Briggs & Stratton. For information concerning
the motor tted to the product, see the Specication
chapter.
Major engine repairs are not described in the
workshop manual. Detailed information on
adjustment and reparation of the engine is available
in Briggs & Strattons’ own manual. The manual can
be ordered from an authorized servicing dealer.
See Technical Data for the engine model number.
It is important that only original spare parts are used
to repair the engine. If other parts are used, the
guarantee is invalidated.
Design and Function
2
1

English – 15
5.4 Steering
The product have articulated steering. The force from the steering wheel is transferred to the rear carriage via
cables and a chain. This makes the product easy and precise to steer. The product mows easily around all the
obstacles on the lawn.
The turning radius is very small thanks to the articulated steering.
Design and Function
Outline sketch of the operation of the articulated steering.
1
The product have a steering column mounted in ball bearings (1).

16 – English
5.8 Cutting unit
The product is equipped with front-mounted cutting
unit to mow e󰀩ciently even in conned spaces.
The product have a cutting width of 850 mm (34”).
Z 85 Mulch
The Z 85, equipped with a Mulch-plug, nely chops
the cuttings to fertilizer. Without the Mulch-plug the
unit works in the same way as a rear ejection unit.
5.7 Drive
The product are equipped with hydrostatic
transmission that provides the driver with full driving
control. The speed is controlled variably using the
pedals forward or reverse.
Design and Function
Removing the Mulch-plug

English – 17
Repair instructions
6 Repair instructions
6.1 Dismount the engine
1 First disconnect the negative terminal on the
battery and then the positive terminal.
IMPORTANT INFORMATION!
Hold the bolts so that the poles
are not put under strain.
2 Remove the rear cover of the front carriage.
3 Lift out the battery.
4 Remove the covers on the back of the machine,
the side covers and the cover over the fuel tank.

18 – English
Repair instructions
5 Place a suitable vessel underneath the fuel tank
to collect the gasoline in.
6 Remove the clamp and hose from the fuel tank
and drain the fuel into the vessel.
x2
7 Unscrew the two screws and washers holding the
fuel tank.
Save the washers for retting the fuel tank!
8 Disconnect the engine pin connector, the ground
cable and the starter motor cable.
9 Disconnect the throttle cable.
x2
10 Unscrew the heat shield for the mu󰀪er.

English – 19
Repair instructions
11 Unscrew the mu󰀪er.
12 Unhook the spring on the drive belt pulley in the
articulated unit and turn the belt tensioner to one side.
13 Loosen the drive belt from the pulley under the
engine plate.
x3
14 Unscrew the remaining 3 screws from the engine
block.
15 Lift o󰀨 the engine.
Assemble in reversed order.

20 – English
Repair instructions
6.2 Fuel tank
6.2.1 Removal
WARNING!
Gasoline is highly ammable and
environmentally hazardous.
Take great care to prevent res
and avoid spills.
1 Place a suitable vessel underneath the fuel lter
to collect the gasoline in.
2 Empty the fuel tank by removing the hose and the
hose clamp from the lower connection of the fuel
lter.
If draining the tank is not desired, the hose can
be compressed with a locking welding pliers.
Make sure to keep the end of the hose above the
level in the tank from now on.
3 Remove the two screws (1) holding the tank.
Lower the tank and pull out the hose through the
machine frame.
x2
6.2.2 Assembly
1 It is easier to work if you empty the tank before
assembly. Install the tank and secure it with the
screws (1).
2 Put the hose in place and connect it to the fuel
lter with a hose clip. Make sure the hose does
not chafe.
3 Loosen the tank cap (2) and ll the tank with
gasoline. Check for leakage.