Kubota LA403 Front Loader Parts Manual

The Kubota LA403 is a front loader that hangs off the front of compact Kubota tractors, and this document is the Kubota LA403 parts manual, not a repair book. In day-to-day fleet work, this is the book you or the parts desk grab when you’re trying to nail down the exact bucket pin, hydraulic seal kit, or cylinder rod before you place an order. People use it to see how the loader is built, plan parts orders ahead of a rebuild, and avoid back-and-forth with the dealer when a machine is already down.

What this manual helps you do

• Identify every individual component on the LA403 loader using exploded diagrams and callout numbers, from pins and bushings to cylinders and brackets.
• Locate the correct OEM Kubota part numbers for wear items like cutting edges, hoses, loader pins, and quick-attach hardware so you can order them once and right.
• Look up quantity-per-machine for fasteners, seals, and small pieces so you can stock ahead and avoid multiple dealer runs during a rebuild.
• Cross-reference older LA403 part numbers against superseded numbers shown in the parts listings when Kubota has updated a component.
• Verify that a part on your shelf actually matches what belongs on the LA403 before you hang it on a machine or place a large stock order.

Who this is for

This Kubota LA403 parts manual suits a farm owner-operator, independent ag mechanic, fleet maintenance manager, or Kubota dealer parts counter that needs precise loader parts identification. If you’re after torque specs, disassembly steps, or adjustment procedures, you want the Workshop/Service Manual instead, not this parts catalog.

FAQ

Q: Does this cover the loader hydraulics, cylinders, and mounting hardware?

A: Yes. A Kubota LA403 parts manual typically includes diagrams and part numbers for the loader frame, boom, bucket linkage, hydraulic cylinders, hoses, valves, and mounting hardware.

Q: Are the part numbers in here the latest ones from Kubota?

A: The manual shows the OEM part numbers and usually notes superseded numbers, but your Kubota dealer will confirm the newest active number when you order.

Bottom line: If your goal is to identify and order the right parts for a Kubota LA403 front loader, this is the right manual; if you need how-to repair instructions, keep looking for the service manual.

Table of Contents:

• Instructions for Parts Books
• LA403
• MAIN FRAME
• SIDE FRAME
• BOOM
• CONTROL VALVE
• CONTROL VALVE [R/V]
• CONTROL VALVE [COMPONENT PARTS]
• CONTROL LEVER
• CONTROL LEVER [R/V]
• CYLINDER/HYDRAULIC HOSE
• HYDRAULIC HOSE(HYD.OUTLET BLOCK)
• HYDRAULIC TUBE
• CYLINDER (BOOM)[COMPONENT PARTS]
• CYLINDER (BUCKET)[COMPONENT PARTS]
• HYDRAULIC BLOCK
• HYDRAULIC BLOCK
• ACCESSORIES AND SERVICE PARTS

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