Part of the Kubota Parts Manuals.
This is the factory Kubota LA402 Parts Catalog, a 42-page PDF you can download and print. It covers the LA402 front loader built in the 2002 to 2007 period, listing every serviceable part across the main frame, brace, boom, control valve, control lever, and hydraulic system. Each assembly pairs an exploded diagram with a numbered parts list, so you can match a component to its exact Kubota part number, quantity, and serial-number range before you order.Use it to identify replacement hoses, tubes, loader cylinders, seal kits, pins, bushings, and fittings, or to rebuild the control valve and the boom and bucket cylinders. Serial breaks matter on this loader, since some references list separate part numbers for earlier and later machines and for the LA402 and LA402-1. Whether you are tracing a hydraulic fault or ordering wear parts, this catalog gives you the numbers you need.
What's Inside This Kubota LA402 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Main Frame | 4-6 | Old Part |
| Brace | 7-8 | Brace Exploded View, Component Overview, Brace Parts List |
| Boom | 9-10 | Boom Exploded View, Component Overview, Boom Parts List |
| Control Valve | 11-16 | Control Valve Exploded View, Component Overview, Control Valve Parts List |
| Control Valve [Component Parts] | 17-22 | Control Valve Component Parts Exploded View, Component Overview, Control Valve Component Parts Parts List |
| Control Lever | 23-26 | Control Lever Exploded View, Component Overview, Control Lever Parts List |
| Cylinder/Hydraulic Hose | 27-28 | Cylinder Hydraulic Hose Exploded View, Component Overview, Cylinder Hydraulic Hose Parts List |
| Hydraulic Hose(Hyd.Outlet Block) | 29-30 | Hydraulic Hose Hyd Outlet Block Exploded View, Component Overview, Hydraulic Hose Hyd Outlet Block Parts List |
| Hydraulic Tube | 31-32 | Hydraulic Tube Exploded View, Component Overview, Hydraulic Tube Parts List |
| Cylinder (Boom)[Component Parts] | 33-34 | Cylinder Boom Component Parts Exploded View, Component Overview, Cylinder Boom Component Parts Parts List |
| Cylinder (Bucket)[Component Parts] | 35-36 | Cylinder Bucket Component Parts Exploded View, Component Overview, Cylinder Bucket Component Parts Parts List |
| Hydraulic Block | 37-40 | Hydraulic Block Exploded View, Component Overview, Hydraulic Block Parts List |
| Accessories and Service Parts | 41-42 | Accessories and Service Parts Exploded View, Component Overview, Accessories and Service Parts Parts List |
Every system also includes component overview.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main Frame (Label) | 108 kgf (237.6 lb) | p. 6 |
| Brace | 25 kgf (55 lb) | p. 8 |
| Boom | 93 kgf (204.6 lb) | p. 10 |
| Edge Cutting | 13 kgf (28.6 lb) | p. 10 |
| Valve Control (3 Position) | 6.2 kgf (13.64 lb) | p. 12 |
| Valve Control (4 Position) | 12 kgf (26.4 lb) | p. 14 |
| Lever Control | 0.55 kgf (1.21 lb) | p. 24 |
| Cylinder 1 | 10 kgf (22 lb) | p. 28 |
| Tube 1 Hydraulic | 0.75 kgf (1.65 lb) | p. 32 |
| Hydraulic Block (S.No.;<=29999) | 0.3 kgf (0.66 lb) | p. 38 |
Kubota LA402 Common Problems This Manual Covers
Loader lifts or curls intermittently
Owners report the LA402 raising, lowering, or curling inconsistently or not at all. A sticking spool or contaminated control valve is a common cause, and this section identifies the valve assembly parts.
Manual Section: Control Valve p. 11Loader drifts down under load
A loader that will not hold position usually has internal leakage in the valve or cylinders. The component-parts breakdown lists the spool, detent, relief valve, and seal parts inside the control valve.
Manual Section: Control Valve [Component Parts] p. 17Weak or slow loader response
Low or degraded hydraulic fluid, air in the lines, or worn cylinders can slow the loader down. This section covers the boom and bucket cylinder parts and seal kits for a rebuild.
Manual Section: Cylinder (Boom)[Component Parts] p. 33Hydraulic leak at hoses or fittings
Seepage at hose ends and the outlet block is common with age and loader movement. Use this section to identify the hoses, coupler, dust plug, and sleeve for exact replacement.
Manual Section: Hydraulic Hose(Hyd.Outlet Block) p. 29Sloppy or sticky control lever
Worn linkage or bushings make the control lever feel loose or hard to move. The parts list identifies the lever, bushings, joints, and grip for the LA402 controls.
Manual Section: Control Lever p. 23Loose loader mounting hardware
Loose bolts let the loader shift on the tractor and load the frame unevenly. The main frame parts list gives the mount bolts, pins, connectors, and washers with quantities and serial breaks.
Manual Section: Main Frame p. 4Frequently Asked Questions
Which loader does this catalog cover?
It covers the Kubota LA402 front loader from the 2002 to 2007 period. It is a parts catalog, so it identifies components and Kubota part numbers rather than giving repair procedures or torque figures.
Does it help with the LA402 control valve?
Yes. The Control Valve section provides an exploded diagram and parts list, and a separate component-parts section covers the internal spool, detent, and relief valve pieces for repair. p. 11
Can I identify loader cylinder and seal parts?
It does. The cylinder component-parts sections break down the tube, rod, head, piston, and seal kit for both the boom and bucket cylinders so you can order rebuild parts. p. 33
How do I tell LA402 from LA402-1 parts?
Each parts list uses a serial-number (S.No.) column with interchangeability notes, and some references show separate part numbers for early and later machines. Check your loader's serial number against the range before ordering.
What do I get after purchasing this Kubota LA402 manual?
Immediate download of the full 42-page searchable parts catalog. Open it on any device: the laptop at your desk or your phone out in the field.
Are there any print restrictions on this manual?
No restrictions. There is no DRM or copy protection, so print the whole manual or only the pages you need. Any home or office printer handles it.
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