Takeuchi TB228 Mini Excavator Parts Manual (BE7Z008-4-0) (SN 122800001-)

That TB228 usually lives in the mud—trenching along foundations, working in tight backyards, loading spoil by the driveway. This parts manual helps you trace every assembly on the machine down to the last washer, so you can order the right piece the first time. Say you’ve got the house swung apart, boom cylinder off, and you find a chewed-up bushing; this book lets you isolate that joint, verify the exact bushing and seal kit, and get it on order without guessing.

Applications & Use Cases

• Track down undercarriage wear by following the breakdown of rollers, idlers, and belts so you can inspect each piece and replace only what’s actually shot.
• When you’ve got the swing motor out, use the exploded views to route hoses correctly and check which O-rings you’ll need before you start to bleed the system.
• During a big teardown, mark assemblies, then match them to the diagrams to verify every snap ring, shim, and spacer before you button up the transmission or final drive.
• Cross-check older parts against superseded numbers so the dealer can trace the right current part instead of handing you something that won’t align or fit.
• Print the pages for the area you’re working on and keep them at the bench to test your layout and isolate any missing components before reassembly.

FAQ

Q: Is this a searchable PDF or just scanned pages?

A: It’s typically a PDF you can search by part name or number, which makes it a lot faster than flipping through greasy paper.

Q: Can I print just the sections I need for a jobsite repair?

A: Yes, you can usually print specific pages, toss them in a plastic sleeve, and not worry about wrecking your laptop in the mud.

Safety Note

Always lower the attachment, kill the engine, and relieve hydraulic pressure before you inspect or pull any component you’ve traced in the manual.

Takeuchi TB228 Mini Excavator Index:

• UNDERCARRIAGE 1
• LOWER FRAME 2
• CRAWLER BELT (steel) 4
• CRAWLER BELT (with rubber pads) 6
• CRAWLER BELT (rubber) 8
• CARRIER ROLLER 10
• TRACK ROLLER 12
• FRONT IDLER 14
• TRACK ADJUSTER 16
• TRAVEL DEVICE 18
• SLEW BEARING 20
• SWIVEL JOINT & ACCESSORIES 22
• SWIVEL JOINT & ACCESSORIES (angle blade type) 24
• DOZER BLADE 26
• LONG DOZER BLADE 28
• DOZER BLADE (angle blade type) 30
• PIPING; LOWER 34
• PIPING; LOWER (angle blade type) 36
• TURNTABLE & CONTROL LEVER 38
• SLEWING DEVICE 39
• TURNTABLE 42
• BOOM SWING 44
• SWING STOPPER 46
• CONTROL LEVER & PEDAL (122800001-122800379) 48
• CONTROL LEVER & PEDAL (1st aux. ON-OFF type; 122800001-122800379) 54
• CONTROL LEVER & PEDAL (1st aux. only ON-OFF type; 122800380-) 60
• CONTROL LEVER & PEDAL (1st aux. ON-OFF type, with foot switch; 122800380-) 66
• CONTROL LEVER & PEDAL (1st aux. proportional cont. type) 72
• CONTROL LEVER & PEDAL (1st aux. proportional cont. type, with foot switch; 122800380-) 78
• DOZER BLADE LEVER 84
• OPERATION LEVER & STAND 86
• PIPING; OPERATION LEVER 90
• PIPING; OPERATION LEVER (A-G pattern) 92
• PIPING; OPERATION LEVER (A-B pattern) 96
• PIPING; OPERATION LEVER (change 2nd aux. – bucket) 100
• ENGINE & ELECTRICAL SYSTEM 102
• ENGINE & ACCESSORIES (1/3) 103
• ENGINE & ACCESSORIES (2/3) 108
• ENGINE & ACCESSORIES (3/3) 112
• AIR CLEANER (for double element) 116
• DRAIN PLUG 118
• CONTROL BOX; R.H. (cab) 120
• CONTROL BOX; R.H. (cab) (change 2nd aux. – bucket) 122
• CONTROL BOX; R.H. (canopy) 124
• CONTROL BOX; R.H. (canopy) (change 2nd aux. – bucket) 126
• CONTROL BOX; L.H. 128
• CONTROL BOX; L.H. (with cold latitudes heater) 130
• ENGINE CONTROL 132
• DECEL. UNIT 134
• AUTO DECEL. 136
• AUTO DECEL. (canopy) 138
• ELECTRICAL (1/2) (122800001-122801405) 140
• ELECTRICAL (2/2) (122800001-122801405) 144
• ELECTRICAL (1/2) (122801406-) 146
• ELECTRICAL (2/2) (122801406-) 150
• ELECTRICAL (1st aux. proportional cont. type) 152
• ELECTRICAL (1st aux. proportional cont. type, with foot switch) 154
• ELECTRICAL (1st aux. ON-OFF type, with foot switch) 156
• ELECTRICAL (with blade float; 122800001-122801072) 158
• ELECTRICAL (with blade float; 122801073-) 160
• CONTROL UNIT (change 2nd aux. – bucket) 162
• CONTROL UNIT (1st aux. ON-OFF) 164
• CONTROL UNIT (travel alarm) 166
• CONTROL UNIT (arm-in restriction) 168
• CONTROL UNIT (auto decel.) 170
• CONTROL UNIT (cold latitudes heater) 172
• SERVICE DETENT (1st aux. ON-OFF type) 174
• SERVICE DETENT (1st aux. proportional cont. type) 176
• TRAVEL ALARM 178
• BATTERY 180
• BATTERY (with battery switch) 182
• CANOPY LIGHT & SOCKET 186
• CAB LIGHT 188
• RADIO 190
• RADIO BRACKET 192
• MAINTENANCE LIGHT SOCKET 194
• WINDOW WASHER 196
• HYDRAULIC PIPING & TANK 198
• GREASE PIPING 199
• VALVE & ACCESSORIES 202
• VALVE & ACCESSORIES (with blade float) 206
• VALVE & ACCESSORIES (angle blade type) 210
• PIPING; UPPER (1/4) 214
• PIPING; UPPER (2/4) 216
• PIPING; UPPER (3/4) 218
• PIPING; UPPER (4/4) (with blade float) 220
• PIPING; UPPER (1/4) (angle blade type) 222
• PIPING; UPPER (2/4) (angle blade type) 224
• PIPING; UPPER (3/4) (angle blade type) 226
• PIPING; UPPER (4/4) (angle blade type) 228
• ACCUMULATOR 230
• PUMP DRIVE 232
• HYDRAULIC TANK 234
• FUEL TANK & FUEL PIPING (122800001-122802773)-1 238
• FUEL TANK & FUEL PIPING (122800001-122802773)-2 240
• FUEL TANK & FUEL PIPING (122802774-) 248
• COVER & CAB 254
• COVER (1/8) 255
• COVER (2/8) 260
• COVER (3/8) (engine hood) 264
• COVER (4/8) (side cover; R.H.) (122800001-122800547) 266
• COVER (4/8) (side cover; R.H.) (122800548-) 268
• COVER (5/8) (side cover; L.H.) 270
• COVER (6/8) (tank cover) 272
• COVER (7/8) (front cover) 274
• COVER (8/8) (center cover) 276
• FLOOR FRAME (1/3) (122800001-122800037) 278
• FLOOR FRAME (1/3) (light weight seat type) (122800001-122800037) 282
• FLOOR FRAME (1/3) (cab) (122800038-) 286
• FLOOR FRAME (1/3) (canopy) (122800038-) 290
• FLOOR FRAME (2/3) 294
• FLOOR FRAME (3/3) (122800038-122801249) 296
• FLOOR FRAME (3/3) (122801250-) 298
• FLOOR MAT (122800001-122801249) 300
• FLOOR MAT (cab) (122801250-) 302
• FLOOR MAT (canopy) (122801250-) 304
• SEAT (1/2) 306
• SEAT (2/2) (122800001-122804918) 308
• SEAT (2/2) (122804919-) 310
• SEAT (1/2) (light weight type) 316
• SEAT (2/2) (light weight type) 318
• HEAD REST 320
• CAB MOUNT 322
• CAB (1/5) 324
• CAB (2/5) 328
• CAB (3/5) 332
• CAB (4/5) (door; 122800001-122800408) 336
• CAB (4/5) (door; 122800409-) 340
• CAB (5/5) (front sash) 344
• CAB INTERIOR 346
• FRONT GUARD 350
• CANOPY 352
• HEATER (1/2) 356
• HEATER (2/2) 360
• HEATER (for cold latitudes) 362
• HOE ATTACHMENT 366
• BOOM (1/4) 367
• BOOM (1/4) (with boom shut-off valve) 372
• BOOM (1/4) (with shut-off valve) 376
• BOOM (1/4) (with arm-in restriction) 380
• BOOM (1/4) (with boom shut-off valve, arm-in restriction) 384
• BOOM (1/4) (with shut-off valve, arm-in restriction) 388
• BOOM (1/4) (reinforced type) 392
• BOOM (1/4) (reinforced type) (with shut-off valve) 396
• BOOM (1/4) (reinforced type) (with boom shut-off valve) 400
• BOOM (2/4) (boom shut-off valve) 404
• BOOM (3/4-1) (shut-off valve) 408
• BOOM (3/4-2) (shut-off valve) 412
• BOOM (4/4) (arm-in restriction) 414
• ARM 416
• LONG ARM 419
• AUXILIARY LINE 422
• 2ND AUXILIARY LINE 424
• 2ND AUXILIARY LINE (reinforced type) 426
• 3RD AUXILIARY LINE (1/2) 428
• 3RD AUXILIARY LINE (2/2) 430
• 3RD AUXILIARY LINE (1/2) (high pressure type) 432
• 3RD AUXILIARY LINE (2/2) (high pressure type) 436
• 3RD AUXILIARY LINE (1/2) (reinforced type) (high pressure type) 438
• 3RD AUXILIARY LINE (2/2) (reinforced type) (high pressure type) 442
• DECAL & TOOL 444
• DECAL (canopy)-1 445
• DECAL (canopy)-2 450
• DECAL (canopy)-3 454
• DECAL (cab)-1 458
• DECAL (cab)-2 462
• DECAL (cab)-3 466
• DECAL (selector valve) 470
• DECAL (selector valve) (A-B pattern) 472
• DECAL (with blade float) 474
• DECAL (canopy) (lift overload warning) 476
• DECAL (cab) (lift overload warning) 478
• DECAL (crawler belt) 480
• TOOL & ACCESSORIES 482
• PAINTED COLOR 484
• HYDRAULIC DEVICE 486
• SWIVEL JOINT 487
• SWIVEL JOINT (angle blade type) 490
• CONTROL VALVE 492
• CONTROL VALVE (angle blade type) 494
• BLOCK ASSY; No. 1 496
• BLOCK ASSY; No. 2 498
• BLOCK ASSY; No. 3 500
• BLOCK ASSY; No. 4 502
• BLOCK ASSY; No. 5 504
• BLOCK ASSY; No. 6 506
• BLOCK ASSY; No. 7 508
• BLOCK ASSY; No. 8 510
• BLOCK ASSY; No. 9 512
• BLOCK ASSY; No. 10 514
• BLOCK ASSY; No. 11 516
• BLOCK ASSY; No. 12 518
• PILOT VALVE 520
• PILOT VALVE (R.H.) (with 3 switch) 522
• PILOT VALVE (L.H.) (with 3 switch) 524
• PILOT VALVE (R.H.) (with slide switch) 526
• PILOT VALVE (L.H.) (with slide switch) 528
• HANDLE (with slide switch) 530
• HANDLE (with 3 switch) 532
• SELECTOR VALVE (A-G pattern) 534
• SELECTOR VALVE (A-B pattern) 536
• SOLENOID VALVE (1block) (with arm-in restriction) 538
• SOLENOID VALVE (1block) (with 3rd aux. high pressure type) 540
• SOLENOID VALVE (2blocks) 542
• SOLENOID VALVE (2blocks) (change 2nd aux. – bucket) 544
• REMOTE CONTROL VALVE (travel) 546
• REMOTE CONTROL VALVE (with 1st aux. line) 548
• ELECTRICAL PROPORTION VALVE 550
• BOOM SHUT-OFF VALVE 552
• ARM SHUT-OFF VALVE 554
• BOOM CYLINDER 556
• ARM CYLINDER 558
• ARM CYLINDER (with arm-in restriction) 560
• BUCKET CYLINDER (122800001-122805155) 562
• BUCKET CYLINDER (122805156-) 564
• DOZER BLADE CYLINDER 566
• LONG & ANGLE DOZER BLADE CYLINDER 568
• ANGLE BLADE CYLINDER 570
• SWING CYLINDER 572
• TRAVEL MOTOR-1 575
• TRAVEL MOTOR-2 580
• SLEW MOTOR (1/2) (reduction sec.) 584
• SLEW MOTOR (2/2) (motor sec.) 586
• HYDRAULIC PUMP (1/2) 590
• HYDRAULIC PUMP (2/2) 594
• ENGINE – YANMAR 3TNV82A-BPTB,BPTB1 SN 122800001- 596
• Fig1.CYLINDER BLOCK 597
• Fig2.GEAR HOUSING 600
• Fig3.FLYWHEEL HOUSING & OIL SUMP 602
• Fig4.CYLINDER HEAD & BONNET 604
• Fig5.SUCTION MANIFOLD & AIR CLEANER 608
• Fig6.EXHAUST MANIFOLD & SILENCER 610
• Fig7.CAMSHAFT & DRIVING GEAR 612
• Fig8.CRANKSHAFT & PISTON 614
• Fig9.LUB.OIL SYSTEM 616
• Fig10.COOLING WATER SYSTEM 618
• Fig11.FUEL INJECTION PUMP 622
• Fig12.GOVERNOR 626
• Fig13.FUEL INJECTION VALVE 628
• Fig14.FUEL LINE 630
• Fig15.STARTING MOTOR 632
• Fig16.GENERATOR 634
• Fig17.GASKET SET 636
• KITS, ATTACHMENTS & QUICK REFERENCE 638

Takeuchi