This Kubota KX057-4 / U55-4 Operator Manual (OEM #RD358-813-4) runs 131 pages and keeps the focus on safe operation and uptime. Thirty-one pages cover running the machine: boom, arm, bucket, dozer blade, the Two Pattern Selection System, auxiliary port flow settings, and the run-in protocol for the first 50 hours. Pre-operation checks step through every daily item on the LCD display, the warning lamps, the pilot control lock lever, and CAB features like the air conditioner and emergency hammer. Maintenance follows a clear interval schedule: drain the water separator every 50 hours, clean the air filter element every 200, swap the engine oil filter at 250, replace the fuel filter cartridge at 500, and change hydraulic oil at 1,000. Error codes, display navigation, cold-weather prep, and ISO 10567 lifting tables for both models close it out.
What's Inside This Kubota KX057-4, U55-4 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Safe Operation | 9-21 | Before Operation, Operating the Excavator, Safe Loading and Transport, Maintenance, Danger/Warning/Caution Labels, Care of Labels |
| Dealer Service & Technical Data | 23-25 | Excavator Serial Number, Engine Serial Number, Model Specifications (KX057-4, U55-4), Operating Weight, Engine Type, Fuel Tank Capacity |
| Machine Components & Controls | 26-28 | Depicted Contents (Bucket, Arm, Boom, Dozer, Cab), Instrument Panel Switch (LCD, Horn, Travel Speed, Starter, Throttle), Control Pedals and Levers |
| Pre-Operation Checks | 29-46 | Daily Checks, Checking Devices (Starter Switch, Display Selector, Warning Lamp, Clock Setting, Log Record), CAB Type Machines (Wiper/Washer, Heater, Door, Window) |
| Engine Operation | 47-50 | Starting the Engine, Starting Under Cold Conditions, Starting with Auxiliary Battery, Check Points After Starting, Stopping the Engine, Precautions in Overheat |
| Excavator Operation | 51-70 | Running-In of the New Excavator (Do not Work with Full Engine Rpm's or Full Loads during the First 50 Working Hours, Oil Change in the Run-in Stage, Operator's Seat, Seat Belt) |
| Transport & Lifting | 71-74 | Transporting on a Truck, Towing the Machine, Lifting with Cables or Straps, Safety Aspects, Lifting Procedure, Tackle Weights |
| Maintenance Procedures | 75-79 | Maintenance Intervals |
| Adjustments and Replacements | 80-84 | Purging of the Fuel System, Tracks (Special Information when Using Rubber Tracks), Changing the Bucket |
| Troubleshooting | 107-108 | Engine Starting Difficulties, Insufficient Engine Power, Engine Stops, Overheating, Hydraulic System Issues, Drive System Issues, AI System Errors |
| Cold Weather & Long Storage | 109-111 | Preparation for Cold Weather, Anti-freeze Mixing Ratio, Storage Procedures, Operating After Long Storage, Periodic Component Replacement |
| Recommended Oils | 112 | Engine Oil, Gear Oil, Hydraulic Oil, Grease, Fuel (Viscosity Grades, MIL-Standards) |
| Dimensions & Lifting Capacity | 113-122 | Main Dimensions (KX057-4, U55-4), Lifting Capacity (ISO 10567), Load Tables (KX057-4 |
| Display Messages & Errors | 123-127 | Normal Screens (Glow, Default, Tachometer, AUX Port), Navigation List of Screens (Clock Setting, Lock Lever, Fuel Errors, Charging System, Overheat Warning) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine oil filter cartridge replacement interval | every 250 hrs | p. 75 |
| Air filter element (outer) cleaning interval | every 200 hrs | p. 75 |
| Air filter element (outer) replacement interval | every 1000 hrs | p. 75 |
| Fuel filter cartridge replacement interval | every 500 hrs | p. 75 |
| Water separator draining interval | every 50 hrs | p. 75 |
| Hydraulic hoses replacement interval | Every 2 years or 4000 hours | p. 111 |
| Air-conditioner pipes and hoses check interval | every 1 year | p. 77 |
| Swing bearing teeth greasing interval | every 50 hrs | p. 75 |
| Swing bearing teeth grease amount | approx. 50g of grease (approx. 20 to 30 pumps with the grease gun at each position) | p. 66 |
| Coolant check interval | Daily check | p. 75 |
| Coolant change interval | every 2 years | p. 75 |
| Overheat warning message (high coolant temperature) | "Water temp. is Rising" | p. 32 |
Kubota KX057-4, U55-4 Common Problems This Manual Covers
Water temp is Rising warning appears on the display during heavy digging p. 126
Stop digging and let the engine idle. Review the automatic rpm reduction behavior on page 126. Inspect the radiator fins for packed dirt or debris. Blow out the cooling screens with compressed air kept under 205 kPa (30 psi). Check the daily coolant level before resuming work.
Manual Section: Overheat Advance WarningSwing bearing makes a dry grinding noise or binds when rotating the upper structure p. 66
Grease the swing bearing teeth right away, roughly 50g per position as shown on page 66. Work the gun 20 to 30 pumps. Repeat every 50 hrs. Wipe off the excess so dirt doesn't pack in.
Manual Section: Excavator OperationBoom and arm operate slowly or lack lifting power when pulling a heavy bucket p. 107
Inspect the hydraulic system with the troubleshooting steps on page 107. Confirm the oil level at the tank sight glass. Scan the hoses and joints for visible leaks. Swap out any hose past its 4000 hours replacement interval if it shows wear.
Manual Section: TroubleshootingEngine starts hard and blows abnormal exhaust gas color during cold morning startup p. 75
Pull the air filter element and check it for dust blockages. Clean the outer element with compressed air held under 205 kPa (30 psi). Inspect the fuel filter cartridge, and replace it if it has passed the 500 hrs interval on page 75. Drain the water separator every 50 hrs.
Manual Section: Maintenance ProceduresFrequently Asked Questions
KUBOTA KX057-4 error code reset
Periodic check warnings clear once you replace the part and cycle the key on and off 10 times. Other codes, like a fuel sensor or charging system error, call for a different response: contact your local dealer for inspection and repair.
How to reset Kubota U55-4 service alarm
Once servicing is done, cycle the key switch ON and OFF 10 times or more. The periodic check screen then clears from the LCD display on its own.
Kubota KX057-4 troubleshooting error codes
Two sections handle this: 'TROUBLESHOOTING' (pages 85-86) and 'LIST OF SCREENS' (pages 123-127), each listing messages, causes, and countermeasures. When a 'Periodic check (warning)' shows, for instance, replace the part in question and cycle the key on and off 10 times.
Kubota U55-4 warning light meaning
Broken wires, short circuits, fuel shortages, and similar faults all trigger the warning lamp. It flashes red for critical problems and yellow for warning signals. The LCD spells out the specifics, with messages like 'Remaining fuel warning' (yellow lamp) or 'Engine Oil Pressure Err' (red lamp).
How to clear code on Kubota KX057-4 excavator
Maintenance codes like 'Periodic check (warning)' clear after you finish the servicing and part replacement, then cycle the key on and off 10 times. The message drops off the display. For other error codes, reach out to your local dealer.
What do I get after purchasing this Kubota KX057-4, U55-4 manual?
Checkout gets you a 131-page searchable PDF, available to download right away. Open it on a laptop, tablet, or phone and take it straight to the shop floor.
Am I able to print pages from this Kubota KX057-4, U55-4 manual?
No restrictions at all. The PDF is DRM-free, so print whatever sections you want for the shop. Standard letter or A4 paper both work.
Document Quality
This document is a native digital PDF, not a scanned copy, so you can search and copy the full text content. All text is crisp and easy to read, with no blurriness or fading. Diagrams and illustrations are clear raster images, and their labels are consistently readable. The pages are clean, free from any scan artifacts, stains, or skewed content. There is one blank page (page 22) within the document.
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