Part of the Kubota Parts Manuals.
This is the factory parts catalog for the Kubota LA703 front loader, a 29 page reference organized by system with exploded diagrams matched to Kubota part numbers, quantities and serial number ranges. It covers the loader from the main and side frame through the boom, bucket, control valve, control lever and full hydraulic circuit.Use it to identify the exact replacement part before ordering. Each section pairs a picture page carrying reference numbers with a part number page, and the boom and bucket cylinders are broken out into their component parts for reseal work.For owners and independent mechanics servicing a loader that leaks, drifts or moves weakly, it removes the guesswork of matching worn cylinders, hoses, valves, pins and bushings to the correct Kubota part numbers.
What's Inside This Kubota LA703 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Main Frame | 4-5 | Frame Main Lh(Label), Frame Sub LH, Frame Main Rh(Label), Bolt, Washer Spring, Nut |
| Side Frame | 6-7 | Frame Side Lh(Label), Pin Mount, Kit Guard Front, Bolt, Washer Spring, Label Control |
| Boom | 8-9 | Stand, Pin Spring Lock, Fitting Grease, Label Kubota, Nut Lock |
| Bucket | 10-11 | Edge 1 Cutting, Pin 3, Hex.Bolt, Nut Lock, Edge 2 Cutting |
| Control Valve | 12-13 | Stay Valve, Assy Valve Control, Assy Adapter, O-Ring, Nipple, Cap Dust |
| Control Valve [Component Parts] | 14-15 | Assy Valve Control, Kit Plug Detent 1, O Ring, Ring Back Up, Ball, Kit Valve Load Check |
| Control Lever | 16-17 | Lever, Bush, Joint Rod End, Grip Lever, Lever Control, Boot Control Lever |
| Cylinder/Hydraulic Hose | 18-19 | Cylinder 1, Elbow 1, Adapter(Nptf), Cylinder 2, Band Code, Hose 8 Hydraulic |
| Hydraulic Hose(Hyd.Outlet Block) | 20-21 | Hose 5 Hydraulic, Hose 6 Hydraulic, Hose 10 Hydraulic, Band Code, Adapter 1, Block Hydraulic |
| Hydraulic Tube | 22-23 | Tube 1 Hydraulic, Tube 2 Hydraulic, Cover Clamp, Hose 2 Hydraulic, Coupler, Plug Dust |
| Cylinder (Boom) [Component Parts] | 24-25 | Nut, Tube 1 Comp, Rod 1 Comp, Head, Piston 1 |
| Cylinder (Bucket) [Component Parts] | 26-27 | Nut, Head, Kit 1 Seal, Tube 1 Comp, Piston 1 |
| Accessories and Service Parts | 28-29 | Operator's Manual |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Kit Valve Load Check weight | 0.04 kgf | p. 15 |
| Bolt Size | M16*1.50*45 | p. 5 |
| Washer Spring Size | M16 | p. 5 |
| Fitting Grease Type | 90DEG. | p. 9 |
Kubota LA703 Common Problems This Manual Covers
Loader will not lift, curl, or lower
One dead or slow function usually traces to control valve wear or damaged seals. The control valve section exploded the valve, adapters and O rings so you can identify the parts restricting flow.
Manual Section: Control Valve p. 12Hydraulic oil leaks at cylinders and hoses
Worn O rings, cracked hoses and loose fittings weep oil around the loader. The cylinder and hydraulic hose section lists the cylinders, elbows, adapters and hoses for replacement.
Manual Section: Cylinder/Hydraulic Hose p. 18Boom drifts down after being raised
A boom that creeps down points to internal leakage past worn cylinder seals. The boom cylinder section identifies the tube, rod, head, piston and seal kit for a reseal.
Manual Section: Cylinder (Boom) [Component Parts] p. 24Play or clunking in loader arms
Excessive play in the boom and linkage comes from worn bushings and pivot pins. The boom section breaks out the pins, grease fittings and lock nuts for replacement.
Manual Section: Boom p. 8Weak or uneven loader movement
Weak lift and slow response can follow internal control valve wear or a stuck load check. The control valve component parts section diagrams the plug detent, O rings, ball and load check kit.
Manual Section: Control Valve [Component Parts] p. 14Bucket cylinder seal leak
Oil weeping at the bucket cylinders signals worn rod and piston seals. The bucket cylinder section exploded the tube, rod, head, piston and seal kit for a rebuild.
Manual Section: Cylinder (Bucket) [Component Parts] p. 26Frequently Asked Questions
Which loader does this catalog cover?
It covers the Kubota LA703 front loader, including the frame, boom, bucket, control valve, control lever and hydraulic circuit, with the boom and bucket cylinders broken out into their component parts.
Is this a repair manual or a parts catalog?
It is a parts catalog. It provides exploded diagrams, reference numbers, Kubota part numbers, quantities and serial number ranges for identifying and ordering loader parts. It does not contain repair or torque procedures.
Where do I find the control valve internal parts?
The control valve component parts section exploded the plug detent kit, O rings, back up rings, ball and load check kit, so you can source the exact parts for a valve rebuild. p. 14
Does it list the boom cylinder seal kit?
Yes. The boom cylinder component parts section identifies the tube, rod, head, piston and seal kit, so you can match the correct seals for a boom cylinder reseal. p. 24
What do I get after purchasing this Kubota LA703 manual?
The full 29-page searchable Parts Catalog downloads as a PDF the moment payment clears. Open it on a laptop, tablet, or phone right at the workbench.
Is this Kubota LA703 Parts Catalog printable?
Yes. The PDF carries no DRM, so you can print any page or section your shop needs. It works with any standard printer.
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