Part of the Kubota Parts Manuals.
This is the Kubota LA301 and LA351 loader parts catalog, a 29 page illustrated PDF covering both loaders in one book. It lays out the main frame, boom, control valve, control lever, the boom and bucket cylinders, and the hydraulic tube and hose circuits, plus the optional front guard.Each section pairs an exploded diagram with a numbered parts list carrying Kubota part numbers, quantities, and serial number ranges. Because the LA301 and LA351 share this book, the serial columns show where the two models differ, so you can order the exact part that fits your machine.Use it to identify control valve and lever parts, quick couplers, cylinder seal kits, and pins and bushings for repairs like a loader that will not lift, a drifting boom, or leaking couplers. Frame and attachment hardware is broken out for structural repairs.
What's Inside This Kubota LA301, LA351 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Main Frame | 3-4 | Frame Main, Label Danger, Label Caution, Hex.bolt, Frame Side LH, Label Warning, Label Model, Label Lubricate |
| Boom | 5-6 | Brace, Hex.bolt, Hex.nut, Stand, Collar, Fitting Grease, Label Kubota |
| Control Valve | 7-8 | Stay Valve, Hex.bolt, Hex.nut, Valve Control, Assy Adapter, Assy Elbow Adjustabl, Throttle, Nipple |
| Control Valve/Control Lever | 9-10 | Stay Valve, Hex.bolt, Hex.nut, Valve Control, Assy Adapter, Assy Elbow Adjustabl, Throttle, Assy Plug Orifice |
| Control Valve [Component Parts] | 11-14 | Valve Control, Kit Detent Float, Kit Detent Regen, Assy Relief Valve, Kit Load Check, Kit Seal, Kit Upper Boom Spool, Kit Upper Bucket Spo |
| Control Lever | 15-16 | Lever, Bushing, Collar, Rod, Joint Rod End, Hex.nut, Lever Control, Grip Lever |
| Cylinder-Hydraulic Hose | 17-18 | Cylinder, Mark White, Mark Yellow, Mark Blue, Mark Red, Assy Hose Hydrauli, Hose Hydraulic, Coupler |
| Cylinder (Boom) [Component Parts] | 19-20 | Cylinder, Tube Comp, Rod Comp, Head, Piston, Kit Seal, Fitting Grease |
| Cylinder (Bucket) [Component Parts] | 21-22 | Cylinder, Tube Comp, Rod Comp, Head, Piston, Kit Seal, Fitting Grease |
| Hydraulic Tube | 23-24 | Tube Hydraulic, Hex.bolt, Clamp, Washer |
| Hydraulic Hose | 25-26 | Hose Hydraulic, Adapter, Band Code, Block Hydraulic |
| Front Guard | 27-29 | Kit Guard Front, Hex.bolt, Hex.nut, Cushion, Manual Assembly for Option Only |
Kubota LA301, LA351 Common Problems This Manual Covers
Loader hesitates or will not lift
Slow or absent lift under load often points to worn control valve components or a restriction in the valve. The control valve is diagrammed with its stay valve, spool, and adapter parts for service.
Manual Section: Control Valve p. 7Boom drifts down under load
The boom slowly settles when the lift cylinder leaks internally past worn seals. The boom cylinder breaks down into tube, rod, head, piston, and seal kit parts for a rebuild.
Manual Section: Cylinder (Boom) [Component Parts] p. 19Weak or slow bucket curl
Uneven or fading bucket action usually means the bucket cylinder has lost pressure through worn seals. The bucket cylinder is itemized down to its individual seal kit.
Manual Section: Cylinder (Bucket) [Component Parts] p. 21Oil weeping at couplers and hoses
Hydraulic leaks at the quick couplers or aging hoses are a known LA301 and LA351 service issue. The couplers, dust plugs, and hoses are listed with part numbers so you can match replacements.
Manual Section: Cylinder-Hydraulic Hose p. 17Vague or binding joystick
Excessive play or poor response at the control lever comes from wear in the lever, bushings, and clevis pins. Each of these is broken out as a replaceable part.
Manual Section: Control Lever p. 15Loose main frame hardware
Cracked or loose mounting points and worn pins in the main frame lead to play or misalignment. The frame, connectors, pins, and mounting hardware are listed individually for replacement.
Manual Section: Main Frame p. 3Frequently Asked Questions
Which models does this catalog cover?
It covers both the Kubota LA301 and LA351 loaders in one book. Parts lists include serial number columns that show where the two models use different parts, so you can order the correct one for your machine.
Does it account for serial number differences in the valve?
Yes. The control valve component parts section lists parts by serial number range, so early and later LA301 and LA351 loaders are both covered with the correct valve internals. p. 11
Can I find the cylinder seal kits?
Yes. The Cylinder (Boom) component parts section breaks the lift cylinder into its tube, rod, head, piston, and seal kit, with Kubota part numbers for ordering a rebuild set. p. 19
Are the front guard parts included?
Yes. The Front Guard section lists the guard kit, front guard, mounting bolts, nuts, washers, and cushion, so you can identify and order the front guard hardware. p. 27
Do I get instant access to this Kubota LA301 Parts Catalog?
It downloads as a PDF the moment your payment clears. The full 29-page searchable catalog is yours right away, ready to open on a laptop, tablet, or phone in the shop.
Are there any print restrictions on this manual?
Print as many copies as you like. Plenty of mechanics run off just the section they need and carry it out to the shop floor.
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