Printed by Takeuchi under publication number PUB. 1, this 208-page shop manual for the TB45 compact excavator is the factory's own book, supplied here as a Takeuchi TB45 shop manual PDF. Hydraulic schematics trace oil from the tank and pump through the control valve, selector valve and joystick levers to the cylinders, travel motor and slew motor, while wiring diagrams map the electrical circuits. Troubleshooting fills close to a third of the book and is sorted by symptom for travel, slew, boom, arm, bucket, boom swing and dozer blade. The disassembly chapters take you through the undercarriage, hoe attachment, slew bearing and swivel joint. Set crawler belt tension at 152 to 172 mm (6.0 to 6.8 in.), then torque the shoe bolts to 127 ± 18 ft.lb. On a remote site, there is nobody to call. The PDF is bookmarked and text-searchable, so your copy goes wherever the TB45 is working, on whatever screen you carry.
What's Inside This Takeuchi TB45 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Items of Caution | 9-10 | General Safety Rules, Standard Tightening Torques |
| Items of Caution During Disassembly and Reassembly | 11 | Pre-Disassembly Checks |
| Items of Caution During Removal and Installation of the Hydraulic Units | 12 | Hydraulic Oil Temperature |
| Items of Caution During Removal and Installation of Piping | 13 | Hydraulic Hose Installation |
| Handling of Seals | 14 | O-Ring Maintenance |
| Tightening Torques and General Specifications | 15-20 | Hydraulic Hose Fittings, Pipe Fittings, Bolts and Nuts, Specifications Diagram, General Specifications |
| Performance Check Judgment Standards | 21-34 | Travelling, Slewing, Cylinders, Boom Swing, Natural Fall |
| General Check Judgment Standards | 35-44 | Lever Operating Force, Lever Play, Slew Bearing, Crawler Belts, Pins, Bushings, Lower Machinery, Bucket |
| Disassembly and Reassembly Procedures | 45-98 | Lower Machinery, Hoe Attachment, Upper Machinery, Slew Bearing, Swivel Joint |
| Hydraulic Units Structure and Operation | 99-146 | Hydraulic Oil Tank, Hydraulic Pump, Control Valve, Selector Valve, Joystick Lever, Cylinder, Travel Motor, Slew Motor |
| Troubleshooting Procedures | 147-208 | Entire Machine, Travel, Slew, Boom, Arm, Bucket, Boom Swing, Dozer Blade |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Bushing Inner Diameter | 19.123mm | p. 107 |
| Bushing Overall Length (Rear Pump) | 18.918mm | p. 107 |
| Crawler Belt Tension | 152 — 172 mm (6.0 — 6.8 in.) | p. 38 |
| Shoe Bolt Tightening Torque | 17.5 ± 2.5 kg·m (127 ± 18 ft.lb) | p. 38 |
| Track Roller Standard Value A | 92 mm | p. 41 |
| Track Roller Standard Value B | 116 mm | p. 41 |
| Front Idler Standard Value A | 380 mm | p. 42 |
| Front Idler Standard Value E | 45 mm | p. 42 |
| Drive Sprocket Standard Value A | 7 mm | p. 41 |
| Drive Sprocket Standard Value B | 32 mm | p. 41 |
| Track Spring Track Tension Adjustment Range Standard Value | 45 mm (1.77 in.) | p. 42 |
| Track Spring Cushion Spring Set Dimensions Standard Value | 237 mm (9.33 in.) | p. 42 |
Takeuchi TB45 Common Problems This Manual Covers
Takeuchi TB45 travel speed drops on one side and the machine travels in curves
Test high travel speed against 3.3 km/hr on page 22 and compare both tracks. Then check the travel motor parking brake release value against 7 kgf/cm2 on page 132. Confirm normal drain pressure of 1 kgf/cm2, and verify the 2-speed control valve sees 3 kgf/cm2 or higher.
Manual Section: Travel TroubleshootingUpper structure slew speed slow and upper structure overruns during stopping with the joystick released
Measure slew speed against 8.7 rpm on page 22 before pulling anything apart. Test joystick lever pressure following page 169; 0 to 20 kgf/cm² depending on operating angle is normal. If lever pressure is good, check spool operation pressure next, which should read 175±2 kgf/cm².
Manual Section: Slew Troubleshooting p. 169Boom, arm, bucket and slew operating speeds all slow at the same time
Test relief valves R1, R2 and R3 following page 154; set pressure should be 175 ± 2 kgf/cm². If pressure stays low after adjustment, pull the hydraulic pump. Measure bushing inner diameter against 19.123 mm on page 107 and gear shaft diameter against the 18.935 mm use limit on page 108.
Manual Section: Entire Machine Troubleshooting p. 154Boom cylinder slow operation or boom drops on its own with the lever in neutral
Measure boom natural fall using the Performance Check Judgment Standards first, so you know whether to chase the cylinder or the control valve. Check relief valve set pressure against 175 ± 2 kgf/cm² on page 154. When you open the boom cylinder, handle the O-rings per page 14.
Manual Section: Boom TroubleshootingTrack rollers, front idler and drive sprocket worn and crawler belt hanging slack
Measure crawler belt tension against 152 to 172 mm on page 38 and adjust. Check track rollers against standard value A of 92 mm on page 41 and the front idler against 380 mm on page 42. If tension won't come in, confirm the track spring adjustment range of 45 mm.
Manual Section: General Check Judgment Standards p. 38Frequently Asked Questions
How do you bleed the hydraulic system on a Takeuchi TB45?
To bleed the hydraulic system, run the engine at low speed and operate the hydraulic cylinder 3 or more times slowly for the full stroke. For the hydraulic oil tank, pressurize the tank by tightening the air bleed plugs while each cylinder is in the fully extended state. p. 12
What is the standard crawler belt tension for the TB45?
The standard crawler belt tension is 152 to 172 mm (6.0 to 6.8 in.) measured at the center between the frame lower surface and the shoe plate upper surface. p. 38
What is the tightening torque for M12 bolts (coarse thread) on the TB45?
The standard tightening torque for M12 coarse thread bolts (ISO Strength Category 10.9) is 8.5 to 11.0 kgf·m (61.5 to 79.5 ft·lb). p. 16
What is the oil capacity for the hydraulic tank on the TB45?
The hydraulic oil tank capacity is 110 liters (29.1 U.S. gal) at the tank level, with a total system capacity of 125 liters (33 U.S. gal). p. 22
What is the main control valve relief pressure setting on the Takeuchi TB45?
The main control valve relief valve is set to 175 kg/cm² (2489 psi) at a flow rate of 38 liters/minute. p. 24
What do I get after purchasing this Takeuchi TB45 manual?
You get a 208-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Does this Takeuchi TB45 manual allow printing?
Yes. Many buyers print one chapter at a time for their own shop and keep the rest on a tablet.
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