Splitting open the hydrostatic transmission is the toughest job on these tractors, and this 248-page Iseki TH4260, TH4290, TH4330 service manual PDF takes you through its disassembly and reassembly, then widens to the clutch, front axle, power steering and engine removal. Hydraulic circuit diagrams trace oil from the gear pump through the main control, flow control and PTO control valves, while wire harness layouts show how the electrical accessories are routed. Service standards fill over a third of the book, giving limits for brakes, 4WD, steering and the gear pump. Set intake and exhaust valves to 0.35 mm cold, and snug the steering assembly bolts to 1.1 kgf·m before the 2.1 kgf·m final pass. A tractor parked in the shed costs you weather. With chapter bookmarks and a text layer you can search, the right spec is a few taps away and your tractor is working the field again sooner.
What's Inside This Iseki TH4330, TH4290, TH4260 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 5-22 | Tractor Types and Punched Identification Marks, Specifications, Drawings of Transmission |
| Disassembling Into Major Functional Components | 23-40 | Operation Chart for Disassembling and Re-Assembling by Major Blocks, Exterior Parts, Radiator, Separation of Engine From Front Transmission, Removal of Engine |
| Engine Service Data and Accessories | 41-48 | Radiator, Cooling Fan and Belt, Air Cleaner, Fuel System, Trouble Shooting |
| Clutch | 49-54 | Specifications and Construction, Disassembly, Inspection, Re-Assembly, Trouble Shooting |
| Transmission | 55-66 | General Description, Removal and Installation |
| Hydrostatic Transmission | 67-86 | Construction and Names, Disassembly, Reassembly |
| Front Axle | 87-92 | Construction, Disassembly, Inspection, Trouble Shooting |
| Steering System | 93-104 | Construction, Steering Hydraulic Circuit, Integral Orbit Roll, Disassembly, Re-Assembly, Cylinder System, Trouble Shooting |
| Hydraulic System | 105-134 | Hydraulic System Diagram, Hydraulic Circuit Diagram, PTO Control Valve, Specifications, Cylinder, Main Control Valve, Flow Control Valve, Safety Valve |
| Electrical Accessories | 135-142 | Cable Layout, Wire Harness Layout, Trouble Shooting |
| Specifications & Capacities | 143 | |
| Lubrication & Fill Points | 144 | Crankcase, Radiator, Fuel Tank, Rear Housing, Front Axle |
| Periodic Inspection Table | 145 | Engine Oil, Engine Coolant, Fuel |
| Service Standards | 146-148 | Brake and Related Parts, Transmission and Related Parts, Steering System and 4WD System, Hydraulic System, Engine Accessories, Power-Assisted Steering System, Gear Pump |
| Engine Introduction | 149-152 | E3CD, E3CE, E3CF |
| Engine General Information and Specifications | 153-158 | Specifications, Performance Curves, Exterior Views & Identification Numbers, Sectional Views |
| Engine Service Standards | 159-174 | Precautions for Service Operation, Troubleshooting |
| Engine Inspection and Adjustment | 175-208 | Valve Clearances, Compression, Cylinder Head, Gear Case, Cylinder Block, Pistons and Connecting Rods, Crankshaft |
| Engine Lubrication System | 209-214 | Lubrication Diagram, Oil Filter, Oil Pump |
| Engine Cooling System | 215-216 | Thermostat, Water Pump |
| Engine Fuel System | 217-228 | Injection Pump, Injection Nozzles and Holders, Governor |
| Engine Electrical System | 229-248 | Starter, Alternator, Glow Plugs, Wiring Diagram |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Valve Clearance (Cold) ; Intake | 0.35 mm | p. 6 |
| Valve Clearance (Cold) ; Exhaust | 0.35 mm | p. 6 |
| Input shaft starting torque | 5 – 7 kgf-m (43 – 51 ft-lb) | p. 90 |
| Temporary tightening torque | 1.1 kgf·m | p. 101 |
| Final tightening torque | 2.1 kgf·m | p. 101 |
| Tightening torque of solenoid valve | 120 – 150 kgf-cm (11.8 – 14.7 Nm) | p. 110 |
| Fan belt tension | 13.8 to 14.8 mm (0.54 to 0.58 in.) at 10 kgf | p. 145 |
| Power-assisted steering cylinder dimension between rod ends | 355 ± 2 mm (13.98 ± 0.08 in.) | p. 146 |
| Transmission Oil Capacity | 29.0 liters | p. 7 |
| TH4260F | ||
| Engine Oil Capacity | 3.6 liters | p. 7 |
| TH4290F | ||
| Engine Oil Capacity | 3.6 liters | p. 7 |
| TH4330FH | ||
| Engine Oil Capacity | 4.4 liters | p. 11 |
Iseki TH4330, TH4290, TH4260 Common Problems This Manual Covers
Iseki TH4330 tractor engine overheating, running over-cooled, losing coolant, or cooling fan getting noisy
Check coolant level first; the cooling system holds 7.1 liters on all three models per page 7. Inspect the radiator for leaks, then look over the cooling fan and belt. Measure belt deflection against 13.8 to 14.8 mm listed on page 44 and adjust it before the tractor goes back to the field.
Manual Section: Engine Service Data and Accessories p. 44Tractor clutch slipping when pulling an implement or showing poor disengaging when the pedal is pressed
Remove the clutch following the disassembly steps in the Clutch section starting on page 48. Inspect each part against the inspection procedure there, then work through the slippage and poor disengaging charts in that same section. Replace whatever fails inspection, reassemble in order, and get back out before the weather turns.
Manual Section: Clutch p. 48Front axle issue with steering wheel hard to turn, vibrating steering wheel, and excessive tire wear
Measure front axle fore-and-aft play against 0 to 0.2 mm on page 91 and correct anything outside that range. Check toe-in next; it should read 2 to 6 mm per the same page. Adjust toe-in into spec, then work the Front Axle troubleshooting chart on page 91 if noise or vibration remains.
Manual Section: Front Axle Troubleshooting p. 91Power steering wheel heavy to turn, not returning to neutral, or showing cylinder reaction and oil leakage
Test steering system pressure against 11772 kPa listed on page 6 for all three models. Measure the power-assisted steering cylinder between rod ends; it should be 355 ± 2 mm per page 146. If both check out, work the Steering System troubleshooting steps on page 101 and inspect the Integral Orbit Roll for leakage.
Manual Section: Steering System Troubleshooting p. 101Hydraulic system lift will not rise, will not lower, or shows too slow lift lowering speed
Test main hydraulic system pressure against 14715 kPa listed on page 6. Then inspect the main control valve, flow control valve, safety valve and lift cylinder described in the Hydraulic System section from page 104. Torque hydraulic pipes to 58.9 to 78.5 Nm per page 110 before you hitch the implement back up.
Manual Section: Hydraulic System p. 104Starter does not operate, battery weak, and gauges, horn or pilot lights not working
Check the battery first, then trace the starter, switch, and gauge circuits on the wiring diagram on page 134. Verify each connection along the wire harness layout in the Electrical Accessories section, and work the troubleshooting charts for starter, horn, and pilot lights in that section. Fix the fault before the next planting window.
Manual Section: Electrical Accessories p. 134Frequently Asked Questions
What is the cylinder head bolt tightening torque for the Iseki TH4330, TH4290, TH4260?
The cylinder head bolts must be tightened in a specific sequence to a final torque of 6.0 - 7.0 kgf-m (43.4 - 50.6 ft-lbs). The tightening process should be performed in steps: first to 2 kg-m (14 ft-lbs), then to 4 kg-m (29 ft-lbs), and finally to the specified torque. p. 188
What is the specified valve clearance for the engine on the Iseki TH4330, TH4290, TH4260 tractor?
The specified valve clearance for both the intake and exhaust valves is 0.35 mm when the engine is cold. p. 176
What is the engine oil capacity for the TH4330 model?
The engine oil capacity for the TH4330 model is 5.3 U.S. qts (5.0 liters). p. 143
How often should the oil and filter be changed?
The initial oil and filter change should be performed after 50 hours of operation. Subsequent oil and filter changes should be performed every 100 and 300 hours. p. 143
What is the correct fan belt deflection?
The fan belt deflection should be between 13.8 mm and 14.8 mm when a force of 10 kg is applied to the center of the belt between the fan pulley and the alternator. p. 176
Is this Iseki TH4260 Service Manual a digital download?
Straight to your device: 248 pages of searchable Service Manual, downloadable the moment payment goes through.
Is printing allowed for this Iseki TH4260 Service Manual?
Yes, printing is unrestricted: a single page, a chapter, or the lot, on letter or A4.
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