This is the Kubota operator manual for the L1720 front loader, the attachment built to mount on the Kubota L305, L305DT, L345, L345DT, and L355SS tractors. It covers setup, installation, operation, maintenance, and troubleshooting for the loader and its hydraulic system.Inside you get the loader specifications, the full installation instructions with mounting kit identification and bolt torque, and the pre-delivery inspection checklist. The operation section explains the hydraulic system, cold-weather use, loading and unloading the attachment, and handling the load, while the maintenance section covers lubrication, oil level checks, cylinders, hoses, and the valve.Reference drawings show the muffler relocator, buckets and tines, mounting brackets, the bucket level indicator, and the hydraulic tubes and hoses. It is a searchable PDF you can download now, print, or keep on a phone or tablet in the shop while you install or service the loader.
What's Inside This Kubota L1720 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| To the Purchaser | - | Contents, Mr. Purchaser, Watch for This Alert Symbol |
| Directional Reference | - | Parts and Service |
| Safety | - | - |
| Loader Set-Up & Installation | - | Tractor Preparation, Loader Preparation & Bolt Torque, Loader Installation Instruction |
| Loader Installation Instructions | - | Model L1720 Loader for Kubota L305, L305DT, L345, L345DT or L355SS Tractors, Uncrate and Identify Mounting Kit, Valve and Miscellaneous Parts |
| Pre-Delivery Inspection and Orientation | - | Dealer Inspection (Tractor, Loader), Dealer Owner Orientation (Review and Explain the Following Items with the Customer, Give the Customer This Operators Manual) |
| Operation | - | Hydraulic System, Cold Weather Operation, Loading the Attachment, Raising the Load, Unloading the Attachment, Handling the Load |
| Attachments and Options | - | Material Handlers, Material Buckets, Bucket Level Indicator |
| Lubrication and Maintenance | - | Look for Trouble, Lubrication, Oil Level Check and Change, Cylinders, Tubing, Hoses, And Fittings, Valve |
| Trouble Shooting | - | A. Loader Operation, B. Oil Leaks, C. Damage |
| Reference Drawings | - | Muffler Relocator L305-L305DT, Muffler Relocator L345-L345DT, Material Buckets and Tines, Loader and Mounting Brackets, Bucket Level Indicator, Loader Hydraulic Tubes and Hoses |
| Notes | - | External Hydraulic Kit (Pump and Reservoir), Tractor Hydraulic Kit, Kubota Tractor Corporation, Printed in U.S.A. |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic system break-in cycle time after air removal | 15 minutes | p. 16 |
| Hydraulic relief pressure for L305 tractor system | 1800 P.S.I. | p. 14 |
| Hydraulic relief pressure for L345 and L355SS tractor system | 2000 P.S.I. | p. 14 |
| General torque for 5/8" (15.88mm) Grade 5 bolts | 150-180 ft-lbs (203.4-244.1 Nm) | p. 9 |
| Hydraulic filter replacement interval (first) | 30 hours | p. 23 |
| Hydraulic filter replacement interval (thereafter) | 150 hours or once every season | p. 23 |
| External Hydraulic Kit Pressure Hose dimension | 3/8" x 96" | p. 35 |
| External Hydraulic Kit Suction Hose dimension | 1" x 103" | p. 35 |
| Greasing frequency for points marked with 10 | TWICE DAILY or EVERY 5 HOURS | p. 22 |
| Greasing frequency for points marked with 10 with a line through it | DAILY or EVERY 10 HOURS | p. 22 |
| Maximum Lift Height | 113.5 inches | p. 4 |
| Break-Away Capacity | 2450 lbs. | p. 4 |
Kubota L1720 Common Problems This Manual Covers
Loader arms slow or jerky
Air trapped in the hydraulic system makes the arms move slowly or jerk after installation or service. The operation section covers the hydraulic system and the cycling needed to purge air.
Manual Section: Operation p. 16Loader will not lift or functions stall
A loader that will not raise or whose functions cut out is a common complaint, often from low oil, air, or a hydraulic connection problem. The trouble shooting section covers loader operation faults.
Manual Section: Trouble Shooting p. 25Oil leaks at cylinder pins and fittings
Seepage at cylinder pins, tubing, or hose fittings shows up with age and use. The lubrication and maintenance section covers the cylinders, tubing, hoses, and fittings and how to check them.
Manual Section: Lubrication And Maintenance p. 22Loose mounting bracket bolts
Loader and cylinder loads back out mounting hardware if it is not torqued correctly at setup. The set-up and installation section covers loader preparation and the bolt torque values.
Manual Section: Loader Set-Up & Installation p. 8Hydraulic oil foams or overheats
Foaming, overheating, or a noisy loader after operation usually means air was not fully purged or the fluid level is low. The operation section describes the warm-up cycling and leak checks.
Manual Section: Operation p. 16Worn pivot pins from missed greasing
Neglected grease points wear the loader and cylinder pivot pins and bushings. The lubrication and maintenance section covers the greasing schedule for the loader pivot points.
Manual Section: Lubrication And Maintenance p. 22Frequently Asked Questions
Which loader and tractors does this cover?
It is the operator manual for the Kubota L1720 front loader, which mounts on the Kubota L305, L305DT, L345, L345DT, and L355SS tractors.
Does it include installation instructions?
Yes. The loader installation section walks through uncrating and identifying the mounting kit, valve, and parts, mounting the brackets, fitting the hydraulic kit, and the muffler relocation for each tractor model. p. 10
Does it list bolt torque specifications?
Yes. The set-up and installation section covers loader preparation and the bolt torque values used when mounting the loader to the tractor. p. 8
Does it cover maintenance and troubleshooting?
Yes. The lubrication and maintenance section covers oil checks, cylinders, hoses, and greasing, and a separate trouble shooting section covers loader operation, oil leaks, and damage. p. 22
Is this Kubota L1720 LOADER Operator Manual a digital download?
This is a 38-page searchable PDF, and it downloads the moment you check out. Open it on a laptop, tablet, or phone and take it straight to the shop floor.
Is this Kubota L1720 LOADER Operator Manual printable?
Yes. Print as many copies as you like; there are no restrictions. Plenty of mechanics just run off the one section they need and keep it in the cab.
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