Part of the Kubota Parts Manuals.
This is the Kubota Parts Catalog for the LA681 front loader, a 31 page illustrated parts breakdown taken from the factory parts book. It pairs exploded diagrams with the matching part number tables so you can find the exact component you need and order it correctly.The catalog is organized by assembly: main frame, side frame, boom, control valve and its component parts, control lever, boom and bucket cylinders, hydraulic tubes, and hydraulic hoses. Each figure shows reference numbers that link to a table listing Kubota part numbers, descriptions, quantities, and serial number ranges.Use it to identify worn or damaged parts, confirm hardware sizes and thread specifications, and match the right piece before you buy. It is a PDF download you can view on a computer, tablet, or phone, and print any page for the parts counter or the shop bench.
What's Inside This Kubota LA681 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Main Frame | 3-4 | Figure: Main Frame, Table: Main Frame, Frame Main LH, Label Danger 1, Hex.Bolt, Washer Spring Lock, Support Hose |
| Side Frame | 5-6 | Figure: Side Frame, Table: Side Frame, Frame Side LH, Label Danger 3, Hex.Bolt, Washer Spring Lock, Support Brace |
| Boom | 7-8 | Figure: Boom, Table: Boom, Stand LH, Pin Spring Lock, Cir-Crip External, Fitting Grease, Hex.Bolt |
| Control Valve | 9-12 | Figure: Control Valve, Table: Control Valve, Stay Valve, Hex.Bolt, Washer Spring Lock, Valve Control, Assy Adapter 1 |
| Control Valve [Component Parts] | 13-16 | Figure: Control Valve [Component Parts], Table: Control Valve [Component Parts], Valve Control, Cap Spool, Kit Detent Float, Assy Shut-Off Plug, Plate-Seal |
| Control Lever | 17-20 | Figure: Control Lever, Table: Control Lever, Lever, Bushing, Hex.Bolt, Grip Lever, Cushion Rubber, Cylinder / Hydraulic Hose |
| Cylinder (Boom) [Component Parts] | 23-24 | Figure: Cylinder [Component Parts], Table: Cylinder [Component Parts], Tube 1 Comp, Rod 1 Comp, Piston 1, Kit Seal |
| Cylinder (Bucket) [Component Parts] | 25-26 | Figure: Cylinder [Component Parts], Table: Cylinder [Component Parts], Tube 2 Comp, Rod 2 Comp, Piston 1, Plug |
| Hydraulic Tube | 27-28 | Figure: Hydraulic Tube, Table: Hydraulic Tube, Tube 1 Hydraulic, Tube 2 Hydraulic, Clamp 1, Hex.Bolt, Washer Spring Lock |
| Hydraulic Hose | 29-30 | Figure: Hydraulic Hose, Table: Hydraulic Hose, Assy Hose 4 Hyd, Nipple, Guard Hose, Coupler, Mark Orange |
| Accessories and Service Parts | 31 | Table: Accessories and Service Parts, Operator'S Manual, Workshop Manual, Flat-Rate Schedule |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main Frame Hex Bolt Thread/Length (M12) | M12*1.25*80 | p. 4 |
| Main Frame Hex Bolt Thread/Length (M14) | M14*1.5*40 | p. 4 |
| Main Frame Hex Bolt Thread/Length (Imperial) | 9/16-18UNF*1-3/4 | p. 4 |
| Side Frame Hex Bolt Thread/Length (M16) | M16*1.5*50 | p. 6 |
| Boom Grease Fitting Angle | 90DEG. | p. 8 |
| Boom Grease Fitting Thread Size | 1/4-28T.T. | p. 8 |
| Boom Hex Bolt Thread/Length | 1/4-20UNC*2-1/4 | p. 8 |
| Boom Nut Thread | 1/4-20UNC | p. 8 |
| Control Lever Bushing Diameter x Length | 5/8*1.00 | p. 18 |
| Control Lever Cotter Pin Diameter x Length | 1/32*1/2 | p. 18 |
| Cylinder (Boom) Grease Fitting Thread | 1/8-27PTF | p. 24 |
| Cylinder (Boom) Nut Thread | 5/8-18UNFP | p. 24 |
Kubota LA681 Common Problems This Manual Covers
Leaking boom cylinders
Loader cylinders that leak lose lift and drift down under load, usually from worn piston seals or a scored rod. The Cylinder (Boom) [Component Parts] section lists the tube, rod, piston, and seal kit part numbers.
Manual Section: Cylinder (Boom) [Component Parts] p. 23Bucket cylinder wear
A bucket that will not hold curl or rolls back slowly points to worn bucket cylinder seals or a damaged piston. The Cylinder (Bucket) [Component Parts] section breaks out the tube, rod, piston, and plug.
Manual Section: Cylinder (Bucket) [Component Parts] p. 25Chafed or leaking hydraulic hoses
Hoses rub, crack, and weep over time, dropping loader performance and making a mess. The Hydraulic Hose section lists the hose assemblies, nipples, guards, and couplers by part number.
Manual Section: Hydraulic Hose p. 29Cracked hydraulic tubes and fittings
Steel hydraulic tubes crack at clamps and bends, causing leaks and pressure loss. The Hydraulic Tube section identifies each tube, clamp, bolt, and washer for replacement.
Manual Section: Hydraulic Tube p. 27Sloppy or drifting control valve
A spool that sticks or a float detent that will not hold traces to worn internal valve parts. The Control Valve [Component Parts] section lists the spool cap, detent float kit, shut-off plug, and seal plate.
Manual Section: Control Valve [Component Parts] p. 13Worn control lever and bushings
Slop in the loader control lever comes from worn bushings, pins, or a loose grip. The Control Lever section lists the lever, bushing, grip, and cushion rubber with their part numbers.
Manual Section: Control Lever p. 17Frequently Asked Questions
What is this document?
It is the Kubota Parts Catalog for the LA681 front loader. It is an illustrated parts breakdown with exploded figures, reference numbers, Kubota part numbers, and quantities.
Does it show part numbers with the diagrams?
Yes. Each group pairs an exploded figure with a parts table. The Main Frame section, for example, opens the breakdown with reference numbers matched to Kubota part numbers. p. 3
Does it cover the loader cylinders?
Yes. The Cylinder (Boom) [Component Parts] section lists the boom cylinder tube, rod, piston, and seal kit part numbers for rebuilding or ordering. p. 23
Is this a repair manual?
No. This is a parts catalog for identifying and ordering parts, not a service manual with repair procedures. It lists figures, part numbers, quantities, and serial ranges for the LA681 loader.
What format is this manual in?
A 31-page Parts Catalog in searchable PDF format, available the moment you complete checkout. View it on a computer, tablet, or phone with no shipping wait.
Are there any print restrictions on this manual?
There are no print restrictions. You can print as many copies as you want. Many mechanics print the section they need and bring it to the shop floor.
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