Takeuchi TL120 Track Loader Parts Manual (BT3Z001-6-0) (SN 21200008-)

A TL120 usually lives in the mud and gravel—landscapers, small demo jobs, tight construction sites—where you’re always fighting packed tracks and banged-up hardware. This parts manual helps you trace every component in the machine, match it to the right part number, and verify what fits your serial range before you spend money. Say you’ve got the loader apart chasing a leak in the travel device: this lets you isolate which seal kit, which snap ring, and which bearing you actually need, instead of guessing at the counter.

Applications & Use Cases

• Track down the exact roller, idler, or track adjuster layout so you can inspect wear points and order the right bits the first time.
• Break down the travel motor and final drive assemblies on paper before you tear in, so you can route hoses correctly and test for what’s missing or reversed.
• Compare old, half-legible casting numbers to the exploded views to check superseded part numbers and avoid wrong substitutions.
• Use the assembly diagrams to align brackets, guards, and covers after a big tear-down, so everything goes back without mystery bolts.
• Keep it on the bench while you rebuild the undercarriage, and mark what you’ll need to replace next service to plan parts stock.

FAQ

Q: Is this manual searchable, or am I just flipping pages?

A: It’s typically a PDF, so you can search by part name or code, then jump straight to the section you need.

Q: Can I print just a few pages to take out to the jobsite?

A: Yeah, you can usually print the diagrams and lists for the area you’re working on and stick them in a sleeve so they don’t get wrecked.

Safety Note

Always bleed off hydraulic pressure and verify the machine’s properly supported before you inspect or remove any undercarriage or lift-arm components.

Takeuchi TL120 Track Loader Index:

• UNDERCARRIAGE 1
• TRACK ROLLER A 2
• TRACK ROLLER B 4
• FRONT IDLER 6
• TRACK ADJUSTER 8
• TRAVEL DEVICE 10
• CRAWLER BELT 12
• MAIN FRAME & CONTROL LEVER 14
• FRAME 15
• ARM STOPPER 18
• HOOK 20
• OPERATION LEVER & STAND 22
• PIPING; OPERATION LEVER 24
• ENGINE & ELECTRICAL SYSTEM 26
• ENGINE & ACCESSORIES (1/2) 27
• ENGINE & ACCESSORIES (2/2) 30
• DRAIN PLUG 36
• CONTROL BOX; R.H. 38
• CONTROL BOX; L.H. 40
• ENGINE CONTROL 42
• ELECTRICAL (1/3) 44
• ELECTRICAL (2/3) 47
• ELECTRICAL (3/3) 50
• ELECTRICAL (cab) 53
• BATTERY 56
• REAR LAMP 58
• MAINTENANCE LIGHT SOCKET (21200020-) 60
• WINDOW WASHER 62
• HYDRAULIC PIPING & TANK 64
• VALVE & ACCESSORIES 65
• PIPING (1/2) 72
• PIPING (2/2) 74
• PUMP DRIVE 76
• HYDRAULIC TANK 78
• FUEL TANK & FUEL PIPING 81
• COVER & CAB 86
• COVER (1/3) 87
• COVER (2/3) (rear door) 92
• COVER (3/3) (engine hood) 94
• FLOOR FRAME 96
• SEAT (1/2) 98
• SAFETY BAR 100
• CANOPY MOUNT 102
• CANOPY (1/2) 104
• CANOPY (2/2) 106
• CAB MOUNT 108
• CAB (1/5) 110
• CAB (2/5) 112
• CAB (3/5) 116
• CAB (4/5) 118
• CAB (5/5) (front door) 122
• REAR MIRROR 124
• AIR CONDITIONER (1/5) (compressor) 126
• AIR CONDITIONER (2/5) (condenser) 130
• AIR CONDITIONER (3/5) (air conditioner unit) 132
• AIR CONDITIONER (4/5) 136
• AIR CONDITIONER (5/5) 138
• ATTACHMENT 140
• ARM 141
• QUICK ATTACHMENT 146
• PIPING; ARM (1/2) 148
• PIPING; ARM (2/2) 150
• DECAL & TOOL 153
• DECAL (canopy)-1 154
• DECAL (canopy)-2 162
• DECAL (cab)-1 170
• DECAL (cab)-2 174
• TOOL 178
• PAINTED COLOR 180
• HYDRAULIC DEVICE 182
• CONTROL VALVE 183
• INLET HOUSING ASSY 186
• BLOCK ASSY; No. 1 188
• BLOCK ASSY; No. 2 190
• SUB VALVE 192
• SELF LEVEL VALVE 194
• PILOT VALVE (R.H.) 196
• PILOT VALVE (L.H.) 198
• HANDLE (with 3 switchs) 200
• HANDLE (with slide switch) 202
• PROPORTIONAL VALVE 204
• LIFT ARM CYLINDER 206
• BUCKET CYLINDER 208
• TRAVEL MOTOR (1/3) (reduction sec.) 210
• TRAVEL MOTOR (2/3) (motor sec. ) 212
• TRAVEL MOTOR (3/3) (valve sec. ) 214
• HYDRAULIC PUMP (1/4) 216
• HYDRAULIC PUMP (2/4) 218
• HYDRAULIC PUMP (3/4) 220
• HYDRAULIC PUMP (4/4) 222
• GEAR PUMP 224
• ENGINE – YANMAR 4TNV84T-XTBL SN 21200008-21200463 226
• Fig1.CYLINDER BLOCK 227
• Fig2.GEAR HOUSING 230
• Fig3.FLYWHEEL HOUSING & OIL SUMP 232
• Fig4.CYLINDER HEAD & BONNET 234
• Fig5.SUCTION MANIFOLD & AIR CLEANER 238
• Fig6.EXHAUST MANIFOLD & SILENCER 240
• Fig7.CAMSHAFT & DRIVING GEAR 242
• Fig8.TURBINE 244
• Fig9.CRANKSHAFT & PISTON 246
• Fig10.LUB.OIL SYSTEM 248
• Fig11.LUB.OIL LINE 250
• Fig12.COOLING WATER SYSTEM 252
• Fig13.FUEL INJECTION PUMP 256
• Fig14.GOVERNOR 260
• Fig15.FUEL INJECTION VALVE 262
• Fig16.FUEL LINE 264
• Fig17.STARTING MOTOR 266
• Fig18.GENERATOR 268
• Fig19.GASKET SET 270
• KITS, ATTACHMENTS & QUICK REFERENCE 274

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