Part of the Kubota Repair Manuals.
This is the Kubota LA344 and LA344S Front Loader Workshop Manual, a 74-page PDF written for the servicing personnel who mount, maintain and rebuild these loaders. It walks through the loader's mechanism, its front remote hydraulic control system, and the step-by-step servicing that keeps the boom and bucket working.The manual is organized into three parts. Information covers safety, decals, loader terminology and specifications. General holds loader identification, the lubricating system, tightening torque tables and the maintenance check list. Front Loader documents the hydraulic circuit, the boom and bucket cylinders, the quick-attach coupler and the servicing procedures.Use it to set relief valve pressure, torque main frame and cylinder hardware to spec, grease the pivot points on schedule and troubleshoot slow or weak lift. It is a downloadable, printable PDF you can keep on the bench or on a phone in the field.
What's Inside This Kubota LA344, LA344S Manual
| System | Pages | Key Topics |
|---|---|---|
| Information | 5-19 | Safety First (Before You Start Service, Start Safely, Operate Safely, Prevent a Fire, Keep a Good Airflow in the Work Area, Discard Fluids Correctly, Prevent Acid Burns, Prepare for Emergencies) |
| General | 20-36 | Identification (Loader Identification), Lubricating System (Lubricants) |
| Special Tools | 37-41 | Special Tools for Loader, Sliding Jig, Correcting Jig |
| Front Loader Hydraulics | 42-44 | Hydraulic Circuit for Front Loader, Specification of Hydraulic Parts, Front Remote Hydraulic Control System |
| Boom & Bucket Cylinders | 45 | Boom Cylinder, Bucket Cylinder, Cylinder Specifications |
| Quick-Attach Couplers & Frame Stand | 46-47 | One Touch Front Loader, One Lever Quick Touch 4 Lines Coupler, Auto Lock Attachment and Detachment, Mechanical Loader Frame Standing Mechanism |
| Spill Guard System | 48-71 | Spill Guard Outline, Spill Guard Linkage, Spill Guard Valve, Boom Up and Bucket Roll-Back Conditions |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| General use screws, bolts, and nuts (M6, Ordinariness) | 7.9 to 9.3 N·m (0.80 to 0.95 kgf·m, 5.8 to 6.8 lbf·ft) | p. 27 |
| General use screws, bolts, and nuts (M8, Ordinariness) | 18 to 20 N·m (1.8 to 2.1 kgf·m, 13 to 15 lbf·ft) | p. 27 |
| Transmission Case Capacity | 11.3 L | p. 25 |
| Transmission Case Lubricant Type | KUBOTA SUPER UDT fluid | p. 25 |
| Grease Fitting Lubricant Type | Moly Ep type grease | p. 25 |
| General Bolt Torque (M10 Ordinariness) | 40 to 45 N·m | p. 27 |
| Hose Fitting Flare Nut Torque (UNF 3/4) | 36 to 40 N·m | p. 29 |
| Main Frame Mounting Bolt Torque (M14) | 115 N·m | p. 50 |
| Hydraulic Pump Flow | 23.5 L/min. | p. 39 |
| Relief Valve Pressure | 12.3 to 12.7 MPa | p. 39 |
| Boom Cylinder Stroke | 326 mm | p. 41 |
| Bucket Cylinder Stroke | 196 mm | p. 41 |
Kubota LA344, LA344S Common Problems This Manual Covers
Slow or weak boom and bucket lift
Loaders that raise slowly or cannot hold a load usually have a hydraulic pump or relief valve out of spec. The Front Loader section gives the pump flow and relief valve pressure so you can measure the circuit and confirm where the pressure is being lost.
Manual Section: 3. Front Loader p. 37Loose main frame mounting bolts
Vibration and repeated loading work the main frame mounting bolts loose, which lets the loader shift on the tractor. The General section lists the maintenance check intervals and the re-tightening torque so the frame stays secure.
Manual Section: 2. General p. 20Leaking or bent cylinder rod
A boom or bucket cylinder that weeps oil or drifts often has a scored seal or a bent piston rod. The Front Loader section covers cylinder servicing and the rod bend limit used to decide whether a rod can be reused.
Manual Section: 3. Front Loader p. 37Neglected pivot pin lubrication
Dry pivot pins wear oval and introduce slop that makes the loader rattle and track poorly. The General section identifies the grease fittings, the correct grease type and the lubrication schedule for the loader joints.
Manual Section: 2. General p. 20Quick-attach coupler not locking
When an attachment will not seat or the auto-lock refuses to engage, the coupler linkage is usually worn or out of adjustment. The Front Loader section describes the one lever quick touch coupler and the auto lock detachment mechanism.
Manual Section: 3. Front Loader p. 37Leaking hydraulic hose fittings
Weeping flare nuts and adapters lose pressure and make a mess under load. The General section provides the hydraulic fitting torque values so hoses and adapters are tightened correctly instead of over-crushed.
Manual Section: 2. General p. 20Frequently Asked Questions
Which loader models does this manual cover?
It covers the Kubota LA344 and LA344S front loaders. Because the two share most of their structure, the illustrations and procedures apply to both, with differences called out where they exist.
Does it list the hydraulic pump and relief valve specs?
Yes. The Front Loader section gives the hydraulic pump flow and relief valve pressure, plus the boom and bucket cylinder strokes, so you can diagnose and set the loader's hydraulic circuit. p. 37
Are tightening torque values included?
Yes. The General section holds the tightening torque tables for general screws and bolts, stud bolts, plugs, grease fittings and hydraulic fittings, so every fastener goes back to the factory value. p. 20
Does it cover the quick-attach coupler and auto lock?
Yes. The Front Loader section documents the one lever quick touch coupler and the auto lock attachment and detachment mechanism, including their structure and function. p. 37
How will I receive this Kubota LA344 Workshop Manual?
Immediate download of the complete 74-page searchable Workshop Manual. Open it on any device, whether that's the laptop at your desk or the phone out in the field.
Can I print this Kubota LA344 manual?
Yes, print as many copies as you want; there are no restrictions. Plenty of mechanics print just the section they need and carry it to the shop floor.
Can I trace hydraulic lines with this Kubota LA344 manual?
Yes. The manual includes electrical wiring diagrams for components like the front hydraulic valve main switch and the 3rd function solenoid valve.
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