Agria 3900 User manual

&
Operating Instructions
for agria
®
Two-Wheel Tractor 3900
Before commissioning the engine, read operating instructions
and observe warnings and safety instructions.
OperatinginstructionsNo.998733 04.97
Power Machines for Soil Cultivation,
Grass and Property Maintenance
3658
Petrol Engine EH 25 D with Automatic Reversing Lock
Diesel Engine 6LD 400

2 Two-wheel tractor 3900 Edition 04.97
Index
Amount of Delivery ........................... 3
Recommendations
Lubricants ......................................... 4
Maintenance and Repair .................. 4
Fuel ................................................... 7
Designation
of Parts ...................... 5, 9, 61, 65, 69
Assembly Instructions ................... 8
1. Safety Instructions ............. 11–16
2. Specifications
Dimensions ..................................... 18
Track Width..................................... 18
Machine .......................................... 19
Vibration Acceleration Value .......... 19
Petrol Engine .................................. 19
Diesel Engine.................................. 20
Noise Levels ............................. 19, 21
Operation on Slopes................. 19, 21
3. Devices and Operating Elements
Engine............................................. 22
Safety Circuit .................................. 23
Clutch.............................................. 23
Gearbox .......................................... 24
Single-Wheel Brake ........................ 24
Central Brake .................................. 25
Differential Gear ............................. 25
PTO................................................. 26
Reversing Lock ............................... 26
Steering Handle ........................ 27, 28
Drive-Wheels .................................. 29
Wheel Fastening Bolts.................... 29
Snow Chains................................... 29
Front Weight ................................... 30
Support leg ..................................... 30
Coupling and Decoupling
Attachments.................................... 31
Electric Starter Version................... 37
4. Commissioning and Operation
Commissioning the Machine .......... 36
Before you operate the machine .... 37
Starting the Petrol Engine .............. 38
Switching off the Petrol Engine ...... 39
Starting the Diesel Engine........ 40, 41
Switching off the Diesel Engine...... 42
Operations ...................................... 43
Driving with Mounted Trailer........... 44
5. Maintenance
Petrol Engine ............................ 45–48
Diesel Engine............................ 49–52
Machine .......................................... 53
Adjustments on Hand Levers ......... 54
Battery ............................................ 55
General ........................................... 55
Storage ........................................... 56
6. Troubleshooting ................. 57–59
Lubricants, Varnishes,
Wear Parts ............................... 63–64
Electrical Wiring Diagrams.... 67–68
Inspection and
Maintenance Chart ....................... 72
Conformity Declaration................ 73
Note fold-out pages!
Fig. A + B ......................................... 5
Fig. B + C ......................................... 9
Fig. D + E, Petrol ........................... 62
Fig. F + G, Diesel, recoil starter .. 66
Fig. H + J, Diesel, electric starter 70

Edition 04.97 Two-wheel tractor 3900 3
Symbols, Name Plate
Please complete:
Machine Type No.:...........................
ID/Machine No.:
.........................................................
EngineType:.....................................
EngineNo.:.......................................
Date of Purchase:..........................
For name plate, refer to p5/fig. A/15,
p9/fig. C/15.
For engine type and number, refer to
p62/fig. E/5
p66/fig. G/11 and p70/fig. J/10.
Please state these data when ordering
spare parts to avoid wrong deliveries.
Only use original agria spare parts!
Specifications, figures and dimensions
statedin these instructions arenot bind-
ing. No claims can be derived from
them. We reserve the right for
improvements without changing these
instructions.
This delivery comprises:
l Operating instructions
l Two-wheel tractor
– Basic machine
– Steering handle
l Tool kit
Symbols
Warning – Danger
Important information
Fuel
Choke
Battery charge indicator
Fast
Slow
Differential Lock
PTO
Brake
Parking Brake
Closed (locked)
Open (unlocked)

4 Two-wheel tractor 3900 Edition 04.97
Recommendations
Lubricants and
Anti-Corrosive Agents:
Use the lubricants specified for en-
gine and gearbox (see “Specifica-
tions”).
We recommend using Bio-lubricat-
ing oil or Bio-lubricating grease for
“open”lubricationpointsornipples(as
specified in the operating instruc-
tions).
We recommend using Bio-slushing
oil to preserve machines and attach-
ments (do not apply on painted cov-
ers). You can brush or spray the oil.
Anti-corrosive agents are environ-
mentally friendly and degrade fast.
Usingecologically safe Bio-lubricants
and Bio-anti-corrosives, you contrib-
ute to environmental protection and
to the wellbeing of humans, animals
and plants.
Maintenance and
Repair:
ThetrainedmechanicsofyourAGRIA
workshopexpertlycarryoutanymain-
tenance and repair work.
Youshouldonlycarry out major main-
tenance work and repairs on your
own, if you have the proper tools and
knowledge of machines and internal
combustion engines.
Do not hammer against the flywheel
with a hard object or metal tools as it
might crack and shatter in operation,
causing injuries and damage. Only
use suitable tools to pull off the fly-
wheel.

Edition 04.97 Two-wheel tractor 3900 5
B
A
Designation of Parts: Petrol Engine

6 Two-wheel tractor 3900 Edition 04.97
Designation of Parts: Petrol Engine
Figure A:
1 Fuel tank
2 Fuel tank cap
3 Oil filling opening of drive gear
4 Steering bar
5 Handlebar
6 Reverse lock
7 Lock pin
8 Clevis
9 W-clip
10 Locking lever for attachment coupling
(on the right, seen in travel direction)
11 Attachment coupling point with integrated PTO
12 Weight support and engine hoob guard
13 Support leg
14 Engine
15 Name plate (on the right, seen in travel direction)
16 Single wheel brake
17 Wheel flange
18 Transmission oil drain plug (on the right, seen in travel direction)
Figure B:
1 Safety lever
2 Hand lever for engine clutch
3 Pawl for engine clutch hand lever
4 Hand lever for differential lock
5 PTO shifter
(with steering handle swivelled [front attachment] = Gear shifter)
6 Locking lever for steering handle side adjustment
7 Gear shifter
(with steering handle swivelled [front attachment] = PTO shifter)
8 Speed adjustment lever
9 Handle lever
10 Hand lever for steering brake, on the left
11 Hand lever for steering brake, on the right

Edition 04.97 Two-wheel tractor 3900 7
Fuel Recommendations
Petrol Engine
Robin EH 25 D
This engine runs smoothly on conven-
tional unleaded regular and super-
grade petrol as well as on leaded
supergrade petrol.
Do not add oil to petrol.
If, for environmental reasons, you use
unleaded petrol, make sure the fuel is
drainedcompletely when shuttingdown
the engine for more than 30 days. This
is to prevent resin residue from deposit-
ing in the caburetor, fuel filter, and tank.
Oradda fuel stabilizing liquidtothefuel.
When storing the two-wheel tractor at
theend of the season,also drain leaded
fuel completely or add a fuel stabilizing
liquid.
For further instructions see “Engine
Preservation”.
Diesel Engine
Lombardini 6LD 400
Thisenginerunssmoothlyonconven-
tional diesel fuel or oil seed rape.
Winter operation:
Toensure reliable winteroperation of
the diesel engine use “winter diesel”,
which is sold at filling stations in win-
ter.
At outside temperatures of below
-15° C, additionally, take the follow-
ing precautions:
add conventional flow conditioners
or
add paraffine oil to lower the diesel
pour-point:
Paraffine oil: winter summer
diesel diesel
pour-point
50% ca. -31°C ca. -25°C
30% ca. -26°C ca. -15°C
10% ca. -20°C ca. - 9°C
As a last resort, you can add up to
30% of regular petrol to avoid
paraffine depositing in the machine.
However,this has negative effectson
fuel economy and driving.

8 Two-wheel tractor 3900 Edition 04.97
Instructions for Unpacking and Assembly
l Open top of cardboard box.
l Cut along all four corners of the
box and fold down the sides.
l Move the reverse gear lever (4)
backwards.
l Fit the steering handle (1) onto the
pin (3) of the steering column. Make
sure that Bowden cables 2a are
routed on the right side of the steer-
ing column and and Bowden cables
2band 2c onthe left sideof the steer-
ing handle (seen in travel direction).
l Insertsteeringhandle retaining pin
(5) into the hole on the steering col-
umn. Hold the flat pin end horizon-
tally.Press the steering handle all the
way down until it rests on the surface
of the steering column. Before, push
the reverse gear lever (4) all the way
back.Useasrewdriver or similar tool.
Carefully hammer the steering han-
dle retaining pin into the steering col-
umn until it is flush with the column.
If it is not possible to hammer the pin
flush into the steering column, the
steering handle may not rest on the
surface of the steering column or the
flat end of the pin (5) is not horizon-
tal.
l Boltdown the retainingpin (5) with
boltsand washers 7–9. (Tightenbolts
at a torque of approx. 10 Nm).
l Fit the shifters (10, 11) into the
joints (12) and secure each shifter
with a W-clip (13).
l Check Bowden cables to ensure
they are not bent and squeezed.
l Fit drive wheels (accessory) (see
page 29).
l Electric starter version: Fill battery
with accumulator battery acid and
charge the battery (see page 35).

Edition 04.97 Two-wheel tractor 3900 9
C
Designation of Parts: Diesel Engine
B

10 Two-wheel tractor 3900 Edition 04.97
Figure C:
1 Fuel tank
2 Fuel tank cap
3 Oil filling opening of drive gear
4 Steering bar
5 Handlebar
6 Reversing lock
7 Lock pin
8 Clevis
9 W-clip
10 Locking lever for attachment coupling
(on the right, seen in travel direction)
11 Attachment coupling point with integrated PTO
12 Weight support and engine hoob guard
13 Support leg
14 Engine
15 Name plate (on the right, seen in travel direction)
16 Single wheel brake
17 Wheel flange
18 Transmission oil drain plug (on the right, seen in travel direction)
Designation of Parts: Diesel Engine
Figure B:
1 Safety lever
2 Hand lever for engine clutch
3 Pawl for engine clutch hand lever
4 Hand lever for differential lock
5 PTO shifter
(with steering handle swivelled [front attachment] = Gear shifter)
6 Locking lever for steering handle side adjustment
7 Gear shifter
(with steering handle swivelled [front attachment] = PTO shifter)
8 Speed adjustment lever
9 Handle lever
10 Hand lever for steering brake, left
11 Hand lever for steering brake, right