Forty-one pages, no filler: this Kubota front loader manual (OEM #97897-17130) runs from the hydraulic circuit through a full cylinder teardown. Circuit and control-block schematics show how fluid routes through the boom and bucket systems, while the control valve teardown handles both the 3-position and 4-position bucket types. Fifteen pages cover service work step by step: pulling the loader off the tractor, servicing the controller, inspecting the side and main frames, plus a troubleshooting section and the complete servicing specifications. Brass 9/16-18 hose fittings get 16.3 to 17.6 N·m; 9/16 adjustable elbows take 37 to 44 N·m. With the loader down, you want factory numbers, not a forum guess. Each section is bookmarked, so pull it up on your phone and search any spec by keyword.
What's Inside This Kubota LA513, LA723, LA853 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety First | 3-5 | - |
| Safety Decals | 6 | - |
| Loader Terminology | 7 | Loader Control Lever, Side Frame, Main Frame, Boom, Bucket, Cylinders |
| Specifications | 8-11 | [1]Loader Specifications, [2]Bucket Specifications, [3]Dimensional and Operational Specifications |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| General Use Screws, Bolts and Nuts (M6) | 9.8 to 11.2 N·m | p. 22 |
| Hose fitting and flare nut tightening torque (9/16-18, Brass) | 16.3 to 17.6 N·m | p. 23 |
| Adjustable elbow and adaptor tightening torque (9/16) | 37 to 44 N·m | p. 23 |
| LA513 | ||
| Boom Cylinder Bore | 45.0 mm | p. 8 |
| Bucket Struck Capacity | 0.23 m³ | p. 9 |
| Raising Time | 2.7 sec. | p. 11 |
| LA723 | ||
| Boom Cylinder Bore | 50.0 mm | p. 8 |
| LA853 | ||
| Boom Cylinder Bore | 60.0 mm | p. 8 |
| Rated Flow | 37.0 L/min. | p. 8 |
| Maximum Lift Height | 2885 mm | p. 10 |
| Breakout Force at Pivot Pin | 17840 N | p. 11 |
| LA513, LA723 | ||
| Rated Flow | 31.5 L/min. | p. 8 |
Kubota LA513, LA723, LA853 Common Problems This Manual Covers
Front loader moves slowly, jerks, and the boom will not rise smoothly p. 20
Check the transmission fluid level (page 18) and look over the hydraulic hoses for leaks (page 19). Confirm the boom cylinder bore matches the page 8 spec for your model. If it still crawls or jerks, the 'Insufficient Boom Speed' section on page 20 points to a faulty control valve, a defective boom cylinder, or low relief valve setting pressure.
Manual Section: 2. TROUBLESHOOTINGHydraulic oil leaking constantly at the loader arm joints and hose quick couplers p. 19
Inspect every hydraulic hose for cuts, wear, and leaks (page 19), then snug each fitting. Torque the 9/16-18 brass hose fittings and flare nuts to 16.3 to 17.6 N·m (page 23). Swap out any hose or quick coupler that shows damage.
Manual Section: 1. GENERALResidual pressure in the hydraulic lines makes loader attachment or detachment difficult and unsafe p. 26
Bleed off the hydraulic pressure before you touch the couplers by working the control lever through all directions (page 26). If the trouble continues, check the boom cylinder piston rod for damage; its bend must stay within the 0.25 mm limit (page 21).
Manual Section: 5. DISMOUNTING FRONT LOADER FROM TRACTORFront end loader drops by its weight when left in the raised position p. 20
Test the control valve, then examine the boom cylinder tube for heavy wear or worn piston rings (page 20, 'Front End Loader Drops by Its Weight'). Replace the piston rings if the cylinder keeps leaking down, and bring the M16 mounting hardware to 196 to 225 N·m (page 22).
Manual Section: 2. TROUBLESHOOTINGFrequently Asked Questions
What are the torque specs for Kubota LA513/LA723/LA853 loader bolts?
The manual lists torque for several bolt classes. General-use M10 bolts take 48.1 to 55.8 N·m (35.5 to 41.2 ft-lbs). A 9/16-18 brass hydraulic fitting calls for 16.3 to 17.6 N·m (12 to 13 ft-lbs). Special-use hardware like the M16 boom and bucket cylinder piston mounting nut runs 196 to 225 N·m (145 to 166 ft-lbs).
How do I troubleshoot Kubota LA513/LA723/LA853 hydraulic issues?
This section walks through the common hydraulic symptoms: boom not rising, weak boom speed, bucket not moving, weak bucket speed, or the loader dropping under its own weight. Likely causes range from a malfunctioning control valve or defective cylinder to a bad hydraulic pump, clogged oil filter, or damaged relief valve spring. The fix is usually to repair or replace the bad part, or to clean a dirty relief valve.
Why is my Kubota LA513/LA723/LA853 loader not lifting properly?
A boom that won't rise, or rises too slowly, usually traces back to a faulty control valve, a worn boom cylinder, or a weak hydraulic pump. A clogged oil filter, a damaged relief valve spring, or a dirty relief valve can cause it too. Repair or replace whatever part has failed, and clean the relief valve if it is dirty.
What format is this Kubota LA513, LA723, LA853 manual in?
Download the full 41-page searchable Workshop Manual right after purchase. It opens on any device, from the laptop at your desk to the phone in the field.
Can I print this Kubota LA513, LA723, LA853 manual?
Yes. Print as many copies as you like; there are no restrictions. Plenty of mechanics print just the section they need and carry it out to the shop floor.
Can I find hydraulic circuit diagrams in this Kubota LA513, LA723, LA853 manual?
Yes. Hydraulic schematics map every circuit and control valve, along with the component specs for the LA513, LA723, and LA853.
Document Quality
This document is a scanned PDF, not a native digital file. However, it includes an OCR layer, so you can search and copy the full text content. The text quality is crisp and consistently easy to read on every page. All diagrams and illustrations are clear raster images, and their labels are fully readable. The pages are clean, free from scan artifacts, stains, or skewed content, and there are no notable blank or filler pages.
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