Kubota built the L2800 and L3400 around nine systems, and this OEM manual (#9Y011-13194) covers every one back to factory condition. Hydraulic circuit schematics trace fluid routing through the 3-point lift and front hydraulic block; wiring diagrams map operator presence control down to each harness connector. There are exploded views spanning both manual and HST transmission variants, troubleshooting charts, and torque tables for the engine, clutch, brakes, front axle, and steering. Cylinder head bolts go to 93.1 to 98.0 N·m; rear wheel lugs hit 215 N·m before the tractor rolls out of the bay. No more chasing a forum number that turns out wrong. Everything is bookmarked by system, so you can jump straight to engine, hydraulics, or electrical from a phone or tablet right at the machine.
What's Inside This Kubota L2800, L3400 Manual
| System | Pages | Key Topics |
|---|---|---|
| G General | 16-80 | Tractor Identification (Model Name And Serial Numbers, Cylinder Number), Handling Precautions For Electrical Parts And Wiring (Battery, Fuse, Connector), Lubricants |
| 1 Engine | 81-149 | Fuel System, Cooling System, Features, Lubricating System, Servicing Specifications, Checking |
| 2 Clutch | 150-169 | Structure, Servicing Specifications, Checking, Disassembling And Servicing (Checking And Adjusting, Preparation, Disassembling And Assembling) |
| 3 Transmission(Manual Type) | 170-209 | Structure (L2800, L3400), Troubleshooting, Servicing Specifications, Tightening Torques, Disassembling And Servicing (Preparation, Disassembling And Assembling, Servicing) |
| H3 Transmission(Hst Type) | 210-252 | Structure, Power Train For Travelling, Hydraulic Transmission (HST), Oil Flow, Operation, Control Linkage, Range Gear Shift Section |
| 4 Rear Axle | 253-261 | Structure, Disassembling And Servicing (Preparation, Disassembling Rear Axle) |
| 5 Brakes | 262-275 | Operation, Features, Servicing Specifications, Checking, Disassembling And Servicing (Checking And Adjusting, Preparation, Disassembling And Assembling) |
| 6 Front Axle | 276-302 | Structure (2Wd Type, 4Wd Type), Servicing Specifications, Checking, Disassembling And Servicing (Checking And Adjusting, Preparation, Disassembling And Assembling) |
| 7 Steering | 303-318 | Lubricating System (Linkage, Steering Gear Box), Servicing Specifications, Checking, Disassembling And Servicing (Checking And Adjusting, Preparation, Disassembling And Assembling) |
| 8 Hydraulic System | 319-350 | Hydraulic Circuit, Hydraulic Cylinder, Linkage Mechanism, Front Hydraulic Block, Disassembling And Assembling (Checking And Adjusting, Servicing), Servicing Specifications |
| 9 Electrical System | 351-386 | Wiring Diagram, Operator Presence Control, Servicing Specifications, Checking, Disassembling And Servicing (Checking And Adjusting, Disassembling And Assembling) |
Every system also includes tightening torques and troubleshooting.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head bolt torque | 93.1 to 98.0 N·m (9.5 to 10.0 kgf·m, 68.7 to 72.3 lbf·ft) | p. 97 |
| Front wheel mounting screw and nut or lug nut torque | 137 N·m (14.0 kgf·m, 100 lbf·ft) | p. 41 |
| Rear wheel mounting screws and nuts torque | 215 N·m (22.0 kgf·m, 160 lbf·ft) | p. 41 |
| Implement Does Not Rise (Not Noise) - Control linkage improperly adjusted solution | Adjust | p. 327 |
| Radiator screen maintenance | Check and clean | p. 30 |
| Engine oil filter replacement interval | every 200 Hr | p. 27 |
| Engine oil filter tightening instruction | Tighten the filter quickly until it contacts the mounting surface. Tighten filter by hand an additional 1/2 turn only. | p. 31 |
| Transmission case capacity (Manual 2WD) | 27.0 L (7.1 U.S.gals, 5.9 Imp.gals) | p. 24 |
| Transmission case capacity (Manual 4WD) | 27.5 L (7.3 U.S.gals, 6.1 Imp.gals) | p. 24 |
| Seat belt and ROPS attaching hardware maintenance | Check the condition | p. 30 |
| ROPS mounting screw torque | 167 to 196 N·m (17.0 to 20.0 kgf·m, 123 to 144 lbf·ft) | p. 185 |
| Clutch Pedal Free Travel | 20 to 30 mm (0.8 to 1.2 in.) | p. 156 |
Kubota L2800, L3400 Common Problems This Manual Covers
Kubota L2800 and L3400 engine overheating, temperature gauge in red, coolant boiling over
Clean the radiator screen and grill (page 30) first; a packed screen is the leading cause of overheating on these tractors. Check coolant level; system holds 6.0 L with the recovery tank (page 51), antifreeze mix no more than 50%. Verify fan belt deflection is 7.0 to 9.0 mm (page 96). Inspect hose connections and water pump for leaks before refilling.
Manual Section: 1 EngineEngine won't start or cranks slowly in cold weather, battery seems fine
Check battery voltage and starter function using Engine Troubleshooting. Drain any water from the fuel filter sediment bowl; water in diesel kills cold starts. Verify engine oil is at the correct level; capacity is 5.7 L with filter (page 24). If cranking is slow but battery is strong, inspect glow plugs for continuity before pulling anything apart.
Manual Section: 1 EngineClutch drags when fully depressed or slips under load, hard to get into gear p. 150
Measure clutch pedal free travel; spec is 20 to 30 mm (page 156). Adjust the linkage if out of range. If slipping continues after adjustment, pull the assembly and measure disc surface depth to rivet tops; allowable limit is 0.3 mm. Disc boss backlash limit is 2.0 mm. Beyond either limit, replace the disc before returning the tractor to heavy work.
Manual Section: 2 ClutchImplement won't lift fully or drops slowly when parked, hydraulic system feels sluggish p. 327
Verify transmission/hydraulic fluid type first; must be KUBOTA UDT or SUPER UDT. Capacity is 27.0 L (manual 2WD), 27.5 L (4WD manual), or 23.5 L (HST 4WD) per page 24. Replace the hydraulic filter every 200 hours (page 27), tightening 1/2 turn past contact by hand. If fluid checks out, inspect control linkage adjustment at page 327.
Manual Section: 8 Hydraulic SystemBrake pedal soft, poor stopping power, tractor pulls hard to one side p. 262
Confirm brake pedal free travel measures 20 to 30 mm (page 268). Uneven side-to-side pull usually means one side needs linkage adjustment. If travel is correct but stopping power is weak, measure disc thickness; allowable minimum is 4.2 mm (page 268). After any brake work, torque rear wheel hardware to 197 to 226 N·m (page 269).
Manual Section: 5 BrakesFrequently Asked Questions
What are the torque specs for the head bolts on a Kubota L2800?
On the Kubota L2800, torque the cylinder head bolts to 93.1 to 98.0 N·m (9.5 to 10.0 kgf·m, 68.7 to 72.3 lbf·ft). Apply plenty of oil to the threads first, then tighten the bolts in a diagonal sequence, working from the center outward so the clamping load stays uniform.
What are the torque specs for the wheel bolts on a Kubota L3400?
On the L3400, tighten the front wheel mounting lug nuts to 137.3 N·m (14.0 kgf·m, 101.3 lbf·ft). The rear wheel mounting screws and nuts call for a higher 197 to 226 N·m (20 to 23 kgf·m, 145 to 166 lbf·ft).
What are the replacement specifications for Engine oil filter?
A high-efficiency replacement element keeps the engine from suffering serious damage, which is the reason Kubota specifies fitting only a genuine KUBOTA filter for the job.
How will I receive this Kubota L2800, L3400 Service Manual?
Download the complete 386-page searchable Service Manual right away. It opens on any device, from the laptop at your desk to a phone in the field.
Is this Kubota L2800, L3400 Service Manual printable?
Yes. Print as many copies as you want; there are no restrictions. Plenty of mechanics print just the section they need and carry it out to the shop floor.
Does this Kubota L2800, L3400 manual include hydraulic schematics?
Full hydraulic system diagrams are included, covering circuits, valve locations, and hydraulic component specs for the Kubota L2800, L3400.
Document Quality
This document is a scanned PDF with an OCR text layer, allowing you to search and copy text throughout. The text quality is generally crisp and readable. Diagrams and illustrations are primarily raster images, but their labels are clear and legible. Pages are clean with no significant scan artifacts, stains, or skewed content. You will find several blank pages that serve as section dividers.
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