Part of the Kubota Repair Manuals.
This is the Kubota LA434AU front loader Workshop Manual, a 77 page PDF (OEM number 9Y111-13490) covering the LA434AU loader in full workshop detail. It walks through loader specifications, identification, lubricants and tightening torques, the front loader hydraulic circuit, the control valve, the optional 3rd function valve, troubleshooting, servicing specifications, and removing the loader from the tractor.
With it you can diagnose weak or slow loader action, chase hydraulic leaks, rebuild the boom and bucket cylinders, and reset fittings and mounting hardware to the correct torque. Reference figures include a maximum lift height of 1995 mm, a lift capacity of 299 kg, and a hydraulic system maximum pressure of 13.8 MPa.
Delivered as an instant download that prints cleanly, so you can keep a copy at the bench and on the machine.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Information | 3-12 | |
| General | 13-24 | Loader Identification, Lubricants, Tightening Torques (Stud Bolts, American Standard Screws, Bolts and Nuts with Unc or Unf Threads, Plugs, Hydraulic Fittings) |
| Mechanism | 25-52 | Hydraulic Circuit for Front Loader, Control Valve (Hydraulic Circuit, Structure, Operation), 3rd. Function Valve (Hydraulic Circuit, Solenoid Valve Operation, Electrical Diagram) |
| Servicing | 53-77 | 3rd. Function Solenoid Valve, Spill Guard Linkage, Front Loader Control Valve Assembly, Front Loader Control Valve, Relief Valve, Bucket, Boom, Hydraulic Cylinder |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| General Use Screws, Bolts and Nuts (M6, Ordinariness) | 7.9 to 9.3 N·m | p. 18 |
| Hydraulic hose (8) (9) (10) tightening torque | 36 to 40 N·m | p. 73 |
| Piston Seal Clearance (A) | 80 μm | p. 75 |
| Adjustable elbow, Adapter (O-ring port) (UNF) 9/16 thread size tightening torque | 37 to 44 N·m | p. 20 |
| Front loader pipe joint bolt tightening torque | 48 to 56 N·m | p. 61 |
| Pin 1 to Bucket Cylinder and Boom Cylinder Holes Clearance | 0.1 to 0.4 mm | p. 60 |
| Transmission case Capacity | 15 L | p. 17 |
| Hydraulic System Maximum Pressure | 13.8 MPa | p. 11 |
| Loader Net Weight (Approximate) | 213 kg | p. 11 |
| Maximum Lift Height (To bucket pivot pin) | 1995 mm | p. 12 |
| Lift Capacity (500 mm forward, maximum height) | 299 kg | p. 12 |
| Boom Raising Time | 3.7 sec. | p. 12 |
