Part of the Kubota Operator Manuals.
This is the Kubota operator and service manual for the 629 backhoe, built for the B7100 tractor, and the 619B backhoe, built for the B6000 tractor, delivered as a downloadable PDF. It covers specifications, standard six-lever and optional four-lever control operation, troubleshooting, maintenance intervals, and hydraulic cylinder and valve service.
Beyond daily operation, the manual includes parts assemblies for the pump, seat swivel, belly bracket, bucket, boom, mainframe, control section, stabilizer, and hoses, with a simplified hose diagram for the full hydraulic circuit. That makes it useful for both running the backhoe correctly and repairing it.
Owners and mechanics use it to set operating pressures, rebuild leaking cylinders, service the control valves, and replace worn pins, bushings, and hoses. It is a practical reference for keeping a 629 or 619B backhoe digging cleanly.
What's Inside This Kubota 629, 619B Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction and Safety Precautions | 1-2 | 629 Backhoe for B7100 Tractor, 619B Backhoe for B6000 Tractor, Backhoe and Tractor Safety, Hydraulic System Cautions |
| Specifications | 3 | Digging Depth, Reach, Bucket Sizes, Weights, Hydraulic Capacities |
| Controls | 4-7 | Standard 6-Lever Control, Optional 4-Lever Control, Left and Right Stabilizer, Bucket, Dipper Arm, Main Boom, Boom Swing |
| Trouble Shooting | 8 | Backhoe Will Not Operate, Operates Erratically, Oil Overheating, Cylinder Leaking, Operation Slow, Valve Sticking, Excessive Wear, Relief Valve Setting 1850 PSI |
| Maintenance and Hydraulic Service | 9-13 | Lubrication, Hydraulic Cylinder Maintenance, Cylinder Disassembly Step-by-Step, Cleaning and Inspection, Cylinder Rebuild and Reassembly, Seal Kit (Piston Seal, Back-Up Seal, Rod Seal, Rod Wiper, Lock Wire), Hydraulic Valve Maintenance, Control Valve Disassembly and Assembly, Torque Specs (Piston Locknut 150 Ft-Lbs, Control Valve Tie Rods 75/100/125 In-Lbs, Spool Centering Assembly 30 In-Lbs) |
| Mounting Instructions | 14-15 | 629 Backhoe on B7100, 619B Backhoe on B6000, P.T.O. Connection, Mounted Views |
| Parts, Pump, Seat Swivel and Belly Bracket | 16-18 | Pump Assembly, Hydraulic Pump, P.T.O. Drive, Seat Swivel Assembly, Belly Bracket Assembly |
| Parts, Bucket, Boom and Mainframe | 19-22 | Bucket, Pin, Link, Bushing, Arm, Boom, Dipper, Hydraulic Cylinder, Main Frame, Swing, Upper and Lower Mainframe |
| Parts, Control Section and Stabilizer | 23-25 | Valve Assembly, Relief Valve, Connector, Adapter, 4-Lever Control Section, Right and Left Stabilizer |
| Hoses and Diagrams | 26-28 | Hose Assembly (Left Swing, Right Swing, Boom), Helpful Hints, Simplified Hose Diagram |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder Piston Locknut Torque | 150 ft. lbs. | p. 10 |
| Valve Tie Rod Torque (Final) | 125 inch lbs. | p. 12 |
| Hose, Bucket Open Length | 117 inches (297.18 cm) | p. 26 |
| Hose, Bucket Closed Length | 103 inches (261.62 cm) | p. 26 |
| Mainframe Assembly Machine Bolt Size | 3/16 x 1 1/2 | p. 21 |
| Grease Fitting (Zert) Part Number | 648 | p. 19 |
| Control Valve O-ring Part Number | 1058 | p. 13 |
| Hydraulic System Operating Pressure | 1800 P.S.I. | p. 3 |
| Hydraulic System Relief Valve Setting | 1850 P.S.I. | p. 8 |
| Operating Pressure | 1800 P.S.I. | p. 3 |
| Maximum Digging Depth | 6.0 ft | p. 3 |
| Swing Radius | 135 Degrees | p. 3 |
