The KUBOTA Tractor has been thoroughly tested for proper performance with implements sold or approved by KUBOTA. Use with implements which are not sold or approved by KUBOTA and which exceed the maximum specifications listed below, or which are otherwise unfit for use with the KUBOTA Tractor may result in malfunctions or failures of the tractor, damage to other property and injury to the operator or others. [Any malfunctions or failures of the tractor resulting from use with improper implements are not covered by the warranty.]
■ NOTE
• Implement size may vary depending on soil operating conditions.
Model Tread (max. width) Lower link end max. loading
weight W0
Front Rear
B1830
835 mm (32.9 in.)
1025 mm (40.4 in.)
970 kg (2139 lbs)
B2230 1105 mm (43.5 in.)
B2530 1095 mm (43.1 in.)
B3030 935 mm (36.8 in.) 1365 mm (53.7 in.)
Model
Actual figures Implement weight W1
and / or size Max. drawbar load W2 Trailer loading weight W3 Max. capacity B1830
B2230 B2530 B3030
As in the following list
(Shown in the next page) 500 kg (1100 lbs) 1500 kg (3300 lbs)
Lower link end max. loading capacity...The max. allowable load which can be put on the lower link end : W0 Implement weight...The implement's weight which can be put on the lower link : W1 Max. drawbar load...W2
Trailer loading weight...The max. loading weight for trailer (without trailer's weight) : W3
1 ENGINE
MECHANISM
NOTICE
Regarding engine mechanism information, please refer to Workshop Manual
DIESEL ENGINE, MECHANISM (Code No. 9Y021-01874).
CONTENTS
SERVICING
1. TROUBLESHOOTING ...1-S1 2. SERVICING SPECIFICATIONS ...1-S4 3. TIGHTENING TORQUES ...1-S10 [1] TRACTOR SECTION...1-S10 [2] ENGINE SECTION ...1-S10 4. CHECKING, DISASSEMBLING AND SERVICING...1-S11 [1] CHECKING AND ADJUSTING ...1-S11 (1) Engine Body...1-S11 (2) Lubricating System ...1-S13 (3) Cooling System ...1-S14 (4) Fuel System ...1-S16 [2] PREPARATION ...1-S19 (1) Draining Lubricants and Coolant...1-S19 (2) Separating Cabin from Tractor Body (CABIN) ...1-S22 (3) Separating Engine and Front Case from Tractor ...1-S29 [3] DISASSEMBLING AND ASSEMBLING...1-S38 (1) External Components ...1-S38 (2) Cylinder Head and Valve and Oil Pan ...1-S39 (3) Gear Case...1-S42 (4) Piston and Connecting Rod ...1-S46 (5) Crankshaft...1-S49 [4] SERVICING ...1-S51 (1) Cylinder Head and Valves ...1-S51 (2) Idle Gear and Camshaft ...1-S57 (3) Piston and Connecting Rod ...1-S60 (4) Crankshaft...1-S62 (5) Cylinder ...1-S66 (6) Oil Pump ...1-S67
1. TROUBLESHOOTING
W1014322
Symptom Probable Cause Solution Reference
Page Engine Does Not
Start
No fuel Replenish fuel G-7
Air in the fuel system Bleed G-40
Water in the fuel system Change fuel and
repair or replace fuel system
–
Fuel hose clogged Clean G-24, 36
Fuel filter clogged Change G-30
Excessively high viscosity of fuel or engine oil at low temperature
Use specified fuel or engine oil
G-7
Fuel with low cetane number Use specified fuel –
Incorrect injection timing Adjust 1-S16
Injection nozzle clogged Repair or replace 1-S17, S18
Injection pump malfunctioning Replace 1-S44
Seizure of crankshaft, camshaft, piston, cylinder or bearing
Repair 1-S45 to
S50 Compression leak from cylinder Replace head
gasket, tighten cylinder head screw, glow plug and nozzle holder
1-S41 to S42
Improper valve timing Correct or replace
timing gear
1-S45
Piston ring and cylinder worn Replace 1-S48, S66
Excessive valve clearance Adjust 1-S12, S13
ST terminal lead not connected Connect 1-S37
Stop solenoid lead not connected Connect 1-S37
Engine Revolution Is Not Smooth
Fuel filter clogged or dirty Replace G-30
Air cleaner clogged Clean or replace G-21
Fuel leak due to loosing injection pipe retaining nut
Tighten retaining nut 1-S39
Injection pump malfunctioning Replace 1-S44
Incorrect nozzle injection pressure Adjust 1-S18
Injection nozzle stuck or clogged Repair or replace 1-S18
Governor malfunctioning Repair –
Either White or Blue Exhaust Gas Is Observed
Excessive engine oil Reduce to specified
level
G-13
Piston ring and cylinder worn or stuck Repair or replace 1-S48, S66
Incorrect injection timing Adjust 1-S16
Deficient compression Repair 1-S11, S61,
S66
Symptom Probable Cause Solution Reference Page Either Black or Dark
Gray Exhaust Gas Is Observed
Overload Reduce the load –
Low grade fuel used Use specified fuel –
Fuel filter clogged Replace G-30
Air cleaner clogged Clean or replace G-21
Deficient nozzle injection Repair or replace nozzle
1-S17, S18
Deficient Output Incorrect injection timing Adjust 1-S16
Engine's moving parts seem to be seizing Repair or replace –
Uneven fuel injection Replace injection
pump
1-S44
Deficient nozzle injection Repair or replace nozzle
1-S17, S18
Compression leak Replace head
gasket, tighten cylinder head screw, glow plug and nozzle holder
1-S39 to S41
Excessive Lubricant Oil Consumption
Piston ring's gap facing the same direction Shift ring gap direction
1-S47
Oil ring worn or stuck Replace 1-S48
Piston ring groove worn Replace piston 1-S47
Valve stem and valve guide worn Replace 1-S53
Oil leaking due to defective seals or packing Replace – Fuel Mixed into
Lubricant Oil
Injection pump's plunger worn Replace injection pump
1-S44
Deficient nozzle injection Repair or replace nozzle
1-S17, S18
Injection pump broken Replace 1-S44
Water Mixed into Lubricant Oil
Head gasket defective Replace 1-S41
Cylinder block or cylinder head flawed Replace 1-S41
Low Oil Pressure Engine oil insufficient Replenish G-13
Oil strainer clogged Clean 1-S46
Oil filter cartridge clogged Replace G-13
Relief valve stuck with dirt Clean –
Relief valve spring weaken or broken Replace –
Excessive oil clearance of crankshaft bearing Replace 1-S64 Excessive oil clearance of crankpin bearing Replace 1-S63
Excessive oil clearance of rocker arm Replace 1-S55
Oil passage clogged Clean –
Different type of oil Use specified type of
oil
G-7
Oil pump defective Repair or replace 1-S67
KiSC issued 03, 2007 A
W1014322
High Oil Pressure Different type of oil Use specified type of oil
G-7
Relief valve defective Replace –
Engine Overheated Engine oil insufficient Replenish G-13
Fan belt broken or tensioned improperly Replace or adjust 1-S14
Coolant insufficient Replenish G-37
Radiator net and radiator fin clogged with dust Clean –
Inside of radiator corroded Clean or replace G-37
Coolant flow route corroded Clean or replace G-37
Radiator cap defective Replace 1-S15
Radiator hose damaged Replace G-36
Overload running Reduce the load –
Head gasket defective Replace 1-S41
Incorrect injection timing Adjust 1-S16
Unsuitable fuel used Use specified fuel G-7
Symptom Probable Cause Solution Reference
Page