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.

SAFETY/DECALS
ix
DECALS
Decals stating how to handle each driving device in the tractor safely are installed near each driving
device. Read and observe the instructions shown on the decals.
If the decals are illegible due to damage, etc. or if parts with the decals adhered are changed, be
sure to order new decals from the seller and install them to the new parts.
MN00128_A
[Air cleaner cover]
[Upper part of battery]

SAFETY/DECALS
x
MN00129_B
ｃｏｎｔｒｏｌｓ ａｒｅ ｏｆｆ．
BEFORE STARTING ENGINE:
Ｒｅａｄ ｏｐｅｒａｔｏｒｓ ｍａｎｕａｌ ｆｏｒ
ｓａｆｅｔｙ ｉｎｆｏｒｍａｔｉｏｎ ａｎｄ ｏｐｅｒａｔｉｎｇ
ｉｎｓｔｒｕｃｔｉｏｎｓ．
Ｒｅａｄ ａｌｌ ｔｒａｃｔｏｒ ｓａｆｅｔｙ ｓｉｇｎｓ．
Ｂｅ ｓｕｒｅ ｏｔｈｅｒ ｐｅｏｐｌｅ ａｒｅ ｃｌｅａｒ
ｏｆ ｔｒａｃｔｏｒ ａｎｄ ｅｑｕｉｐｍｅｎｔ．
Ｂｅ ｓｕｒｅ ａｌｌ ｇｅａｒｓ ｓｈｉｆｔｅｄ ａｒｅ ｉｎ
ｎｅｕｔｒａｌ ｏｒ ｐａｒｋ ａｎｄ ａｌｌ ＰＴＯ
Ｓｔａｒｔ ｅｎｇｉｎｅ ｏｎｌｙ ｆｒｏｍ ｓｅａｔ．
Ｓｈｉｅｌｄｓ ａｒｅ ｆｏｒ ｙｏｕｒ ｐｒｏｔｅｃｔｉｏｎ．
Ｋｅｅｐ ｔｈｅｍ ｉｎ ｐｌａｃｅ．
OPERATION:
Ｋｅｅｐ ｈａｎｄｓ，ｆｅｅｔ，ａｎｄ ｃｌｏｔｈｉｎｇ
ａｗａｙ ｆｒｏｍ ｐｏｗｅｒ ｄｒｉｖｅｎ ｐａｒｔｓ．
Ｆｏｒ ｒｏａｄ ｔｒａｖｅｌ，ｃｏｕｐｌｅ ｂｒａｋｅ
ｐｅｄａｌｓ，ｕｓｅ ｆｌａｓｈｉｎｇ ｗａｒｎｉｎｇ
ｌａｍｐｓ ｕｎｌｅｓｓ ｐｒｏｈｉｂｉｔｅｄ ｂｙ
ｌａｗ，ａｎｄ ｋｅｅｐ ＳＭＶ ｅｍｂｌｅｍ ｖｉｓｉｂｌｅ．
TRACTORS CAN BE UPSET:
Ｒｅｄｕｃｅ ｓｐｅｅｄ ｏｎ ｔｕｒｎｓ ａｎｄ ｒｏｕｇｈ
ｇｒｏｕｎｄ．Ａｖｏｉｄ ｓｔｅｅｐ ｓｌｏｐｅｓ．
Ａｖｏｉｄ ｒｅａｒ ｕｐｓｅｔ．Ｐｕｌｌ ｏｎｌｙ ｆｒｏｍ
ｄｒａｗｂａｒ，ｎｅｖｅｒ ｈｉｇｈｅｒ．
WHEN TRACTOR HAS STOPPED:
Ｅｎｇａｇｅ ｐａｒｋ ｌｏｃｋ ｏｒ ｂｒａｋｅ．
Ｌｏｗｅｒ ｉｍｐｌｅｍｅｎｔ ｔｏ ｇｒｏｕｎｄ．
Ｄｉｓｅｎｇａｇｅ ＰＴＯ，ｓｔｏｐ ｅｎｇｉｎｅ，
ａｎｄ ｗａｉｔ ｆｏｒ ａｌｌ ｍｏｖｅｍｅｎｔ ｔｏ
ｓｔｏｐ ｂｅｆｏｒｅ ｓｅｒｖｉｃｉｎｇ ｏｒ
ｃｌｅａｒｉｎｇ ｅｑｕｉｐｍｅｎｔ．
Ｎｏ ｒｉｄｅｒｓ ｏｎ ｔｒａｃｔｏｒ ｏｒ
ｅｑｕｉｐｍｅｎｔ．
Ｒｅａｄ ｔｈｅ ｍａｎｕａｌ ｏｆ ｔｒａｃｔｏｒ ａｎｄ ｉｍｐｌｅｍｅｎｔ ｗｉｔｈ ｃａｕｔｉｏｎ
ａｎｄ ｃｏｎｎｅｃｔ ｔｈｅ ｉｍｐｌｅｍｅｎｔ ｃｏｒｒｅｃｔｌｙ．
Ｒｅｇｕｌａｔｅ ｈｅｉｇｈｔ ｏｆ ｔｈｅ ｉｍｐｌｅｍｅｎｔ ｗｉｔｈ ｔｈｅ ｕｐｐｅｒ
ｌｉｍｉｔ ｓｔｏｐｐｅｒ ｏｆ ｐｏｓｉｔｉｏｎ ｌｅｖｅｒ．
ＣＯＮＮＥＣＴＩＯＮ ＯＦ ＩＭＰＬＥＭＥＮＴ
ＴＯ ＰＲＥＶＥＮＴ ＡＮ ＩＮＪＵＲＹ ＡＣＣＩＤＥＮＴ ＡＮＤ ＤＡＭＡＧＥ ＯＦ ＭＡＣＨＩＮＥ
●
●
Decals list
No. Part No. Part Name
1 1904 2746 000 Label Warning
2 1944 2784 000 Label Battery
3 1944 2783 000 Label Warning
4 1944 2786 000 Label Warning

1. Warranty and Service
- This machine is attached with a Limited Warranty Description. Please read it carefully prior to use.
- Contact the dealer for service and purchase of any parts for this machine. Please inform the model name,
serial number, and engine number when contacting.
Purpose of Use
- Please use the machine for agricultural work with a farm working Implement attached. Do not use the
machine for purpose other than intended or modify the machine.
- If the machine is used for purpose other than intended or modified, it is out of warranty. Please refer to the
limited warranty description for details.
PRIOR TO USE
MN00001_B
Location of Serial No.
(Right Side)
Location of Serial No.
(Right Side)
Location of Engine No.
Location of Engine No.
Location of Model Plate
Location of Model Plate
- Do not use the machine for purpose other than intended.
- Do not modify the machine. If the machine is modified, it can not only reduce its original
performance but also may cause a fatal injury.
WARNING
1

PRIOR TO USE
2
2. Specifications (Equipment)
The main specification (equipment) is as described below.
Some parts may be changed for purpose of quality and performance improvement and safety reasons. In
case any changes are made, some parts of this manual, pictures, and drawings may not match the actual
product.
Power steering
Steering column tilt lever
High-speed T/M
Position control
Model Type
Specification
Mitsubishi GX50A

PRIOR TO USE
3
3. Terms and Glossary
Terms such as “front and rear”, “left and right”, “clockwise”, and “counterclockwise” used in this instruction
manual are based on the following rule.
MN00066_B
Right Rear
Front Left
Turn Right (Clockwise) Turn Left (Counterclockwise)
Definition of Signs
Items to be followed are indicated with the following signs in this instruction manual.
- : Important items for safety are categorized in three levels and
described. Please be sure to read thoroughly.
- NOTE : Points to bring out the full performance of the machine are described. If not followed, it may
cause machine damage.

FUNCTIONS OF EACH PART
4
1. Names of each part
FUNCTIONS OF EACH PART
MN00067_B
Headlight
Alternator
Muffler
Engine Control Lever
(Throttle Lever)
Position Control Lever
Parking Brake Lever
Rear PTO Shift Lever
Accelerator Pedal
Flow Control Grip
Brake Pedal (Left) (Right)
Turn Signal Indicator (Right)
MN00068_A
MFD Control Lever
Step
Clutch Pedal
Fuel Tank
Steering Column
Tilt Lever
Fuel Cap
Shuttle Shift Lever
Steering Wheel
Hood
Radiator
Air Cleaner
Battery
Turn Signal Indicator (Left)

FUNCTIONS OF EACH PART
5
2. Operating Controls
1. Control Switches and Instruments
MN00003_A
Meter Panel
Engine Control Lever
(Throttle Lever)
Brake Pedal (Left) (Right)
Clutch Pedal
Shuttle Shift Lever
MN00004_A
Turn Signal Lamps
Engine Glow Plug Indicator
Engine Oil Pressure Indicator
Battery Charge Indicator
Fuel Gauge
Hourmeter
Tachometer
Starter Key Switch
Combination Switch
(Headlight Switch, Horn Switch,
and Turn Signal Switch)
Engine Coolant
Temperature Gauge
Fuel Filter Lamp

FUNCTIONS OF EACH PART
6
< > {OFF}
The power and the engine are turned off when
the key is in this position.
The key can be removed.
< > {OFF}
The power and the engine are turned off when
the key is turned to this position.
< > {HEAT} & {ON}
When the key is turned to this position, the
power is turned on, the engine glow plug
indicator at the meter is lit, and the engine is
warmed up.
When the warm-up is completed, the engine
glow plug indicator is turned off, and it is ready
to start operation.
Engine glow plug indicator lighting time:
Approx. 6 seconds.
< > {START}
When the key is turned to this position, the
engine starts. By releasing the key after the
engine is started, the key returns to < >
position automatically and the engine is in run.
NOTE
- The engine does not start if the clutch pedal
is stepped completely.
MN00005_A
Starter Key Switch
OFF HEAT&ON
HEAT&ON START
Manual Manual Automatic
Return
Engine Glow Plug Indicator ( )
When the key is turned to < >, the indicator
is lit to indicate, the engine is in warm-up.
Tachometer
It indicates the engine speed in revolution per
minute.
Hourmeter
It indicates the engine driving time. For
example, 00191 indicates 19.1 hours (19
hours and 6 minutes) in the rated revolution.
Fuel Gauge
When the key is turned to < >, it indicates
the remaining fuel amount in the tank.
Supply fuel when the pointer indicates close to
<E> in advance.
Engine Coolant Temperature Gauge
When the key is turned to < >, the gauge
indicates the engine coolant temperature.
NOTE
- When the pointer indicates <H>, it is over
heated. Stop the work and decelerate the
engine to cool down, and then stop. Check
the amount of coolant, clogging of radiator
(refer to page 49), and tension of fan belt
(refer to page 50). If these items are in
normal status, there is another cause. Have
it inspected immediately.
Starter Key Switch
For injury accident prevention
- Keep the key removed when not using
the tractor.
WARNING

FUNCTIONS OF EACH PART
7
Charge Indicator ( )
It indicates an error in battery in charging during
engine operation.
It is normal that the lamp is lit with the key set to
< > while the engine is off and turned off
when the engine starts.
NOTE
- If the lamp is lit continuously during
operation, stop the engine and check the fan
belt (refer to page 50).
If the fan belt is OK, there is another cause.
Have it inspected immediately.
Engine Oil Pressure Indicator ( )
It indicates an error in lubrication system of the
engine during engine operation.
It is normal that the lamp is lit with the key set to
< > while the engine is off and turned off
when the engine starts.
NOTE
- If the lamp is lit during operation, stop the
engine and check the amount of engine oil
(refer to page 41).
If the amount of oil is appropriate, there is
another cause. Have it inspected
immediately.
Turn Signal Lamps
It flickers along the turn signal indicators
flickering.
Combination Switch
(1) Headlight Switch
•••••••••••••• Off
•••••••• Light the meter lamps and
headlight lamp downward.
(2) Horn Switch
When the switch is pressed, the horn sounds.
(3) Turn Signal Switch
It is used to indicate turning to right and left.
•••••••• Turn right
•••••••• Turn left
Fuel Filter Lamp
It is lit when the water accumulates in the fuel
filter. When the lamp is lit, remove the water.
(Refer to page 43.)
MN00002_A
(2) Horn Switch
(3) Turn Signal Switch
(1) Headlight Switch
MN00006_A
Fuel FilterFuel Filter

FUNCTIONS OF EACH PART
8
2. Levers, Pedals, and Seats
NOTE
- When changing the gear, depress on the clutch pedal.
Clutch Pedal Operation
Main shift lever
Shuttle shift lever
Sub shift lever
Rear PTO shift lever
Required
Required
Required
Required
MN00007_A
Rear PTO Shift Lever
Accelerator Pedal
Brake Pedal
Parking Brake Lever
Hood
Side Cover
Clutch Pedal
Shuttle Shift Lever
MFD Control
Lever
Sub Shift Lever
Steering Column
Tilt Lever
Main Shift Lever
Steering Wheel
Engine Speed Control Lever
(Throttle Lever)
Differential
Lock Pedal