Mitsubishi GX50A User manual

MITSUBISHI TRACTOR
GX50A
OPERATOR'S MANUAL

SAFETY/DECALS
i
CONTENTS
SAFETY / DECALS ......................................ii
SAFETY PRECAUTIONS ......................................... ii
DECALS................................................................... ix
PRIOR TO USE .............................................1
1. Warranty and Service.......................................... 1
2. Specifications (Equipment) ................................ 2
3. Terms and Glossary ............................................ 3
FUNCTIONS OF EACH PART ....................4
1. Names of each part ............................................. 4
2. Operating Controls.............................................. 5
1. Control Switches and Instruments ............................ 5
2. Levers, Pedals, and Seats ........................................ 8
3. Electric System.................................................. 14
1.Fuse ......................................................................... 14
4. Hydraulic System .............................................. 17
1. Operation of Control Levers .................................... 17
2. Flow Control ............................................................ 17
3. Power Steering........................................................ 18
4. Front Dozer ............................................................. 19
5. Drawbar/PTO Cap.............................................. 20
1. Drawbar [Optional] .................................................. 20
2. PTO Cap ................................................................. 20
OPERATION PROCEDURE ......................21
1. Inspection before Operation............................. 21
1. Inspecting Items ...................................................... 21
2. Operation Procedure......................................... 22
1. Engine Start ............................................................ 22
2. Starting Operation ................................................... 24
3. Driving ..................................................................... 25
4. Stopping .................................................................. 26
5. Loading and Unloading ........................................... 28
6. Driving on Slope...................................................... 29
WORKING PROCEDURE ..........................30
1. Field Work .......................................................... 30
1. Entry/Exit of Farm Field........................................... 30
2. Appropriate Speed for Work.................................... 31
3. Operation of Differential Lock.................................. 32
4. Turning in Farm Field .............................................. 32
2. Operation of Equipment Required for Work ... 33
1. Tread Adjustment .................................................... 33
2. Implements.............................................................. 34
MAINTENANCE ..........................................35
1. Periodical Inspection and Maintenance List... 35
2. Oil Supply, Lubrication and Water supply....... 39
1. Points for Oil Supply, Lubrication and
Water supply ........................................................... 39
2. Oil Supply, Lubrication and Water supply List ......... 40
3. Inspection and Replacement of Engine Oil ............. 41
4. Replacement of Engine Oil Filter ............................ 42
5-1. Refueling.............................................................. 42
5-2. Cleaning of Fuel Tank .......................................... 43
6. Replacement and Draining of Fuel Filter................. 43
7. Air Vent Procedure .................................................. 44
8. Maintenance of Coolant Water................................ 45
9. Inspection and Replacement of Transmission Oil ... 46
10. Replacement of Hydraulic Pressure Oil filter ........ 47
11. Inspection and Replacement of Front Axle Oil ............. 48
12. Lubrication of Each Part........................................ 48
3. Cleaning of Each Part ....................................... 49
1. Cleaning of Air Cleaner ........................................... 49
2. Cleaning of Radiator and Radiator Screen ............. 49
4. Inspection and Adjustment of Each Part ........ 50
1. Inspection and Adjustment of Fan Belt.................... 50
2. Inspection and Adjustment of Clutch Pedal............. 50
3. Inspection and Adjustment of Toe-In ....................... 51
4. Inspection and Adjustment of Brake Pedals............ 52
5. Inspection of Tires ................................................... 53
6. Inspection of Steering Wheel .................................. 53
7. Inspection of Hoses................................................. 54
8. Inspection and Cleaning of Electric Wirings............ 54
9. Inspection and Recharging of Battery ..................... 55
LONG-TERM STORAGE ...........................60
1. Cleaning, Washing, and Storage of Tractor ............ 60
2. Maintenance during Storage ................................... 61
3. Reuse...................................................................... 61
TROUBLESHOOTING ...............................62
1. Engine................................................................. 62
1. Engine does not start. Trouble at starting. .............. 62
2. Insufficient engine output and engine stop.............. 63
2. Driving and Operating Unit............................... 64
1. Tractor does not start. Brake is not applied............. 64
2. Power Steering........................................................ 64
3. Hydraulic Unit .................................................... 65
1. Hydraulic Systems .................................................. 65
4. Electric and Automatic Control Unit................ 65
1. Electric Systems...................................................... 65
APPENDIX TABLE .....................................66
1.General Data ....................................................... 66
2. Consumables..................................................... 67
1. Engine ..................................................................... 67
2. Air Cleaner and Hydraulic Line................................ 67
3. Electric Components ............................................... 68

SAFETY/DECALS
ii
SAFETY PRECAUTIONS
REMEMBER: "SAFETY" IS ONLY A WORD UNTIL IT IS PUT INTO PRACTICE
Improper handling of the tractor could cause an accident. Prior to the operation of the tractor,
be sure to read this Manual carefully and have a through understanding of all of the contents.
In particular, the instructions given in this section entitled "Safety Precautions" must be strictly
followed.
A. GENERAL OPERATING SAFETY
PRECAUTION
1. Observe all the safety precautions in this
manual when operating the tractor.
2. Operate the tractor while wearing tight
clothing that allows easy movement. Avoid
loose jackets, mufflers, ties, scarves, or
loose shirt sleeves to prevent from being
caught by moving parts.
3. Always work when you are in good
physical condition by taking sufcient rest
to avoid overwork.
4. Do not allow children or adults having
no knowledge of the tractor or tractor
operation, to operate the tractor.
5. Never allows riders on the tractor, linkage
drawbar or attachment while traveling and
operating them.
B. BASIC SAFETY REQUIREMENTS
FOR MAINTENANCE
Always follow these maintenance instructions
before operating the tractor:
1. Immediately repair the head lights and
work lamps required to conform to trafc
regulations where the tractor is operated.
2. Keep tractor steps clean to avoid
accidents due to slippage.

SAFETY/DECALS
iii
3. Cover the PTO shaft with a guard when
not using.
4. Be sure to engage the brake and lower
any attachment or implement before
disassembling any part.
5. Never adjust or service the tractor when
it is in motion or while the engine is
running. Always adjust the brake or clutch
properly in accordance with the adjusting
procedure in the operator's manual.
6. Do not remove the radiator cap while the
engine is running. Shut down the engine
and wait until it cools sufficiently. For
removal, turn the cap to the first stop to
relieve pressure. To replace the coolant,
use the coolant recovery tank.
7. Hydraulic oil or fuel escaping under
pressure can penetrate the skin, causing
serious injury. Before disconnecting oil or
fuel lines, be sure to relieve all pressure.
Before restoring pressure after repair,
be sure all connections are tight and
all hydraulic components are in normal
condition. If injured by leaked uid, see a
doctor immediately for proper treatment.
8. When refueling, be particularly careful rst
to stop the engine completely to prevent
the fuel from igniting. Never refuel in
the presence of an open flame or while
smoking.

SAFETY/DECALS
iv
9. Before starting any work on electrical
equipment or work that may cause you
to touch the electrical parts accidentally,
rst disconnect the battery cables. Never
remove the rubber cap cover at the
positive terminal of the battery cable
end. Before connecting the battery to
the charger, make sure that the charger
switch is in "OFF" position.
Be sure to connect the charger to the
correct terminals on the battery (positive
to positive, negative to negative).
A great amount of hydrogen gas is
generated by the battery when it is being
charged. Take precautions against re: Do
not have any exposed flame in the area
where you are working.
Be sure not to cause any leakage of the
electrolyte, since it will corrode the skin or
clothing. In case of accident as described
below, immediately seek rst aid, and see
a doctor immediately for proper treatment.
a) If the diluted sulphuric acid from the
battery has gotten into the eyes:
Clean the eyes with a lot of clean running
water for more than 15 minutes, while
opening the eyes widely, and see a doctor
immediately for proper treatment.
b) If diluted sulphuric acid from the battery
has been swallowed: Rinse the mouth
with clean water immediately, and drink a
lot of raw eggs or milk. Lie down quietly.
see a doctor immediately for proper
treatment.
c) If diluted sulphuric acid has gotten on the
skin of clothing: Wash away the diluted
sulphuric acid completely with a lot of
clean running water and neutraize with
soap solution. Then rinse with water.
d) If the diluted sulphric acid is spilled: Wash
away with a lot of water or neutralize with
slacked lime or bicarbonate of soda.
10. Stop the engine and make sure the
rear PTO shift lever is in Neutral before
performing any of the following services,
including.
a) Removal of the propeller shaft between
PTO and any attachment.
b) Adjustment of PTO drive train and hitch.
c) Adjustment or cleaning of PTO driven
attachment.
11.The steering wheel always has built-in
play to some extent, which is required for
smooth meshing of sector gear and pinion
gear.
Always inspect the amount of the play. Do
not operate the tractor if there is too much
or too little play in the steering.

SAFETY/DECALS
v
C. OPERATION OF THE TRACTOR
Before driving the tractor, follow these rules:
C-1. Before starting and Driving the Tractor
Operate the tractor only when seated
properly in operator’s seat and keep a rm
grip on the steering wheel at all times.
Never attempt to perform any operation
of the tractor from anywhere else, on or
off the tractor. Always wear a "hard hat"
when operating the tractor.
C-2. Starting and Driving the Tractor
Always operate the tractor at the proper
speeds which enable you to keep the
tractor in complete control.
To start traveling, lower the engine speed
and release the clutch pedal slowly.
Before leaving the tractor, stop the engine,
remove the key, apply the parking brake
and make sure that the engine has come
to a complete stop, and any attachment is
completely touching the ground.

SAFETY/DECALS
vi
Slow down when operating the tractor on
rough ground.
Never attempt to jump on or off from
moving tractor.
When starting the tractor, operating any
attachment or engaging the PTO make
sure that no one is in the way, especially
children.
When starting the engine in an enclosed
area or building, ensure proper ventilation
by opening the doors and/or windows to
prevent carbon monoxide inhalation.
Mount the extension exhaust pipe on the
tractor which has a cabin.
Use of the seat belt is not recommended
for tractor without ROPS.

SAFETY/DECALS
vii
C-3. Traveling on Roads and Streets
For traveling on roads and streets, be
sure to lock both brake pedals together
before driving to prevent either brake from
acting independently.
Never operate the differential lock while
driving at high speed or traveling on the
road. For driving the MFD tractor on the
road, be sure to place the MFD shift lever
in OFF position.
C-4. Steering and Turning the Tractor
Slow down your tractor and disengage the
differential lock before going into a turn,
being careful to prevent any attachments
mounted on the front or rear from hitting
anyone or anything.
C-5. Towing and Operating on Hills
For towing work on downward slope,
place the shift lever in low speed and use
engine brake.
Never try to reduce the speed with brake
only.
Towing a heavy object on a hill is highly
hazardous. Widen the tread of the tractor
and mount the wheel weight or chassis
weight to increase the stability and
operate with extra precaution.

SAFETY/DECALS
viii
When operating the tractor on either a
steep slope or at ground, be sure not to
suddenly steer, brake, clutch or operate
attachments.
Do not operate the tractor at the edge of
cliff or steep slope. Be particularly careful
right after the rain when soil is soft and
may give way easily.
For towing, be sure to use the drawbar
only. Set the hitch point below the center
line of the rear axle. When using a chain,
never try to move forward abruptly.
Avoid operating the tractor on an extreme
slope that appears hazardous, when
forced to operate on such slope, use extra
care. Driving forward out of a ditch or
mired condition or up a steep slope could
cause tractor to tip over rearward.
Back out of such situation if possible.
If the situation does not permit you back
out, use the front wheel weight or the
chassis weight for balancing the tractor
lengthwise. Also in case any extra-heavy
rear mounting. Attachments is used, try to
obtain better balance in this manner.
C-6. Using Attachment
To mount or operate attachment, follow
the instruction manual for the particular
attachment for safe operation.
When using agricultural chemicals with
an attachment on the tractor, always
follow the instructions in the manual for
the attachment as well as the instructions
provided by the chemical manufacturer.