Your TB250 just rolled past 250 hours with the oil, fan belt and air cleaner all due, and the 255-page Takeuchi TB228, TB235, TB250 operator manual PDF (OEM ID AG7E017) lays out that service and every other job for all three mini excavators. Maintenance takes up a full quarter of the book, running from the 10-hour daily check through crawler tension, slew bearing grease and travel motor gear oil to the 4000-hour hydraulic oil change. Specifications list operating ranges and lifting capacities, and the controls chapter explains each warning lamp, switch and ISO or JCB lever pattern. Fill the TB250 oil pan to 7.4 L (3.6 L on the TB228), then spin on a new fuel filter one turn past packing contact: 19.6 to 23.5 N·m with a filter wrench. Every hour it sits, you're paying a crew to wait. Bookmarks and a searchable text layer find the page fast, so your excavator is digging again that shift.
What's Inside This Takeuchi TB228, TB235, TB250 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 4 | Foreword, Manual Storage Compartment, Serial Numbers, Machine Number, Engine Number |
| Machine Description | 5-10 | Front, Rear, Left and Right, Designated Operations, Features, Break-In Period |
| Safety | 11-44 | General Precautions, Precautions When Preparing, Precautions When Starting, Precautions When Operating, Precautions When Stopping, Precautions When Transporting |
| Controls | 45-88 | Names of Components, Covers (Starter Key, Front Cover, Fuel Lid, Fuel Filler Port, Side Cover, Engine Hood) |
| Operation | 89-116 | Before Starting Operation (Getting on or Off the Machine, Walk-Around Inspection, Daily Inspection) |
| Transport | 117-122 | Loading and Unloading, Hoisting the Machine, Securing the Machine (Precautions to Be Taken During Transportation) |
| Maintenance | 123-186 | General (Maintenance Overview, Cautions on Maintenance) |
| Troubleshooting | 187-200 | Symptoms That Are Not Malfunctions, If the Engine Overheats, If the Battery Goes Dead, If a Fuse Blows (Inspecting: and Replacing the Fuse, The Fusible Link) |
| Specifications | 201-234 | Basic Specifications, Machine Dimensions, Operating Ranges, Lifting Capacities |
| Options | 235-255 | Safety Precautions (Cautions When: Installing Attachments, Operating Attachments), Attachment Combination Table |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Engine oil filter replacement interval | Every 250 hrs after the initial 50 hrs. | p. 129 |
| Fuel filter tightening torque | 19.6 to 23.5 N·m or 14 to 17 ft-lb | p. 161 |
| Tightening Torque: Filter Wrench | 19.6 to 23.5 N·m (14 to 17 ft-lb) | p. 143 |
| Tightening Torque: Travel Motor Drain Plug | 177 N·m (130 ft-lb.) | p. 147 |
| Tightening Torque: Side Cutter Bolts | 241 N·m (178 ft-lb) | p. 173 |
| Tightening Torque: Bucket Gap Adjustment Bolts | 54.9 N·m (40.5 ft-lb.) | p. 176 |
| Tightening Torque: Lowering Boom Adjusting Screw Lock Nut | 19.6 N·m (14.5 ft-lb) | p. 198 |
| TB228 | ||
| Engine Oil Pan Capacity (Upper Limit) | 3.6 L (3.8 US qt.) | p. 128 |
| TB235 | ||
| Engine Oil Pan Capacity (Upper Limit) | 4.7 L (5 US qt.) | p. 128 |
| TB250 | ||
| Engine Oil Pan Capacity (Upper Limit) | 7.4 L (7.8 US qt.) | p. 128 |
| Fuel Tank Capacity | 73 L (19.3 US gal.) | p. 128 |
| TB228, TB235 | ||
| Fuel Tank Capacity | 53 L (13.9 US gal.) | p. 128 |
Takeuchi TB228, TB235, TB250 Common Problems This Manual Covers
Takeuchi TB228 TB235 TB250 engine overheating during digging with coolant level dropping and water leaking
Check the fan belt for slack or damage first, then let the engine cool before opening the radiator to check coolant level, following the overheat procedure on page 189. Inspect around the radiator for water leakage, clean out dirt packed into the radiator fins, and clear sediment out of the cooling system.
Manual Section: If The Engine Overheats p. 189Warning lamp flashing during operation for battery charge, engine oil pressure, coolant temperature, or air cleaner
Check which lamp is flashing as soon as you bring the machine to a safe stop. For an oil pressure lamp, check engine oil level; for a temperature lamp, check coolant level; for the air cleaner lamp, inspect and clean the air cleaner. Replace the engine oil filter every 250 hours after the initial 50 hours, per the schedule on page 129.
Manual Section: If A Warning Lamp FlashesBattery dead and engine not cranking at all when the starter key is turned
Check the dead battery procedure for the jumper cable connection order before clamping anything on, then disconnect in the order it specifies once the engine runs. Do not improvise clamp order next to a battery. Recharge the battery afterward and watch the battery charge warning lamp; if it flashes after restart, the battery is not charging.
Manual Section: If The Battery Goes DeadBlown fuse or fusible link with an electrical circuit suddenly going dead on the machine
Remove the starter key before pulling any fuses. Inspect each fuse against the fuse layout, replace any blown fuse with one of the same rating, and inspect the fusible link while you are in there. If a new fuse blows again right away, stop swapping fuses and trace the short in that circuit.
Manual Section: If A Fuse BlowsAfter running the tank dry and refilling, engine cranks but will not restart
Fill the tank, then bleed air from the fuel system following the restarting after adding fuel procedure before you crank again. Long cranking on an air-locked system just drags the battery down. Work through the bleed steps in order, then start the engine. Next time, refuel before the tank runs dry so air never gets drawn in.
Manual Section: Restarting After Adding FuelEngine stopped with the boom raised and the attachment will not come down
Clear everyone from under the hoe attachment, then lower the boom to the ground using the emergency lowering procedure on page 198. Loosen the lowering boom adjusting screw lock nut only as that procedure directs, and when finished, torque the lock nut back to 19.6 N·m (14.5 ft-lb). Never walk under a raised boom while it settles.
Manual Section: Lowering The Boom To The Ground p. 198Frequently Asked Questions
How do I bleed the fuel system after changing the fuel filter?
To bleed the fuel system, open the valve on the water separator. Turn the starter key to the ON position and hold it for about 60 seconds. The automatic air bleeder will then bleed the air from the fuel system. p. 194
What are the engine oil filter replacement specs for the Takeuchi TB228, TB235, TB250 mini excavator?
The engine oil filter is a cartridge type, part number Y129150-35153. It should be replaced every 250 hours after the initial 50 hours of operation. p. 129
What is the engine oil filter tightening torque when replacing it on a Takeuchi TB228, TB235, TB250?
When installing a new engine oil filter, tighten it one more turn with a filter wrench after the filter packing comes in contact with the surface of installation. The required torque is 19.6 to 23.5 N·m (14 to 17 ft-lb). p. 143
What is the standard fan belt tension for the TB228/TB235?
The fan belt tension should be checked by pressing at the center of the fan and alternator pulleys with a force of approximately 98 N (22 lbf). The resulting slack should be 7 to 10 mm (0.28 to 0.4 in). p. 144
What is the procedure for cleaning the radiator fins?
Open the side cover and engine hood, then blow compressed air on the fins to remove mud and dirt. Ensure the air pressure is no higher than 200 kPa (28 psi) and hold the nozzle at a sufficient distance to avoid damaging the fins. p. 157
What exactly do I receive with this Takeuchi TB228 Operator Manual?
This is a 255-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Can I print specific sections of this Takeuchi TB228 Operator Manual?
Yes. Print the pages you need for the job in your own shop, and bin them when they get greasy.
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