Kubota KX121-3, and KX161-3 Workshop Manual — 97899-61520

About this manual

Kubota published this Workshop Manual for the KX121-3 and KX161-3 excavator models. It brings the documented service and technical-reference material for those named excavators into a single publication.

Its documented technical value includes wear limits for service checks and specification lookup. Use the values and conditions stated in the PDF for the applicable model and procedure.

Use the Manual Contents below to check that the exact repair, inspection, or maintenance procedure you need is included in this publication.

Manual details

Manufacturer

Kubota

Manual type

Workshop Manual Supplement

Models

KX121-3 and KX161-3

Document number

97899-61520

Publication year

2011

Language

English

Page count

170

Product highlights

Electrical systems

The manual includes electrical troubleshooting.

Diagnostics

The manual includes sensor-testing information.

Specifications and settings

The manual includes reference information for clearances.

Special tools

A special-tools section is included.

Maintenance

The manual includes a maintenance schedule.

Manual contents

Use these source headings to locate the task or system you need in the PDF.

• VI Optional Unit : Air Conditioner — p. 1
• Mechanism Section. — p. 2
  • A. Air Condition System — p. 3
    • a. Introduction of air conditioner — p. 3
    • b. Components and location — p. 7
    • c. A/C system, electric circuit diagram — p. 11
  • B. Function and structure — p. 21
    • a. Compressor — p. 22
    • b. High pressure relief valve — p. 38
    • c. MAGNETIC CLUTCH — p. 39
    • d. CONDENSER — p. 40
    • e. Receiver — p. 41
    • f. DUAL PRESSURE SWITCH — p. 43
    • g. Air Conditioner Unit — p. 44
    • h. Refrigerant — p. 51
  • C. Electrical System — p. 54
    • a. Electrical Circuit — p. 54
    • c. Air Conditioner Blower Switch — p. 56
    • d. Dual Pressure Switch — p. 57
    • e. Thermostat — p. 59
    • f. Control Panel — p. 60
  • D. Technical Terms — p. 62
    • a. Heat — p. 62
    • b. Temperature — p. 62
    • c. Humidity — p. 64
    • d. Pressure — p. 66
    • e. Change of State — p. 67
    • f. What is a Heater? — p. 69
    • g. Principle of Cooling — p. 69
    • h. Principle of Air Conditioning — p. 72
    • i Refrigeration Cycle — p. 73
    • j. Practical Control of Air Conditioner — p. 74
    • k. Mollier Diagram — p. 77
    • l. Basic Operation of Cooling Cycle — p. 78
    • m. Calculation of Refrigeration Capacity and Power from Mollier Diagram — p. 79
    • n. Calculation of Flow of Circulating Refrigerant — p. 79
    • o. Theoretical Performance (Sample Calculation) — p. 80
• Service Section — p. 83
  • A. Troubleshooting — p. 85
    • a. Visual and Audible Inspection — p. 86
    • b. Components — p. 87
    • c. Diagnosis flow chart — p. 89
    • d. Troubleshooting from Problem Symptoms (Except Refrigeration Cycle Troubles) — p. 91
  • B. Servicing Specifications — p. 92
    • a. Specifications of A/C system and components — p. 92
    • b. Performance Specifications — p. 94
    • c. Adjustment and Testing — p. 94
    • d. Ambient Temperature vs Normal High-Low Pressure Range — p. 95
    • e. Tightening Torques — p. 96
  • C.Regular Check and Service Points — p. 97
    • a. Maintenance interval ; Air conditioner — p. 97
    • b. Regular Service Points — p. 98
  • D. Precautions at Repairing Refrigerant Cycle — p. 100
  • E. Precaution for Installation and Maintenance — p. 101
  • F. Checking and Charging Refrigerant Cycle — p. 103
    • a. Handling Of Service Tools — p. 103
    • b. Checking with Manifold Gauge — p. 109
    • c. Discharging, Evacuating and Charging — p. 113
  • G. Main Components Servicing — p. 119
    • a. Compressor — p. 119
    • b. Condenser and Receiver — p. 126
    • c. Air conditioner unit — p. 129
    • d. Electrical System Components — p. 135
    • e. Heater hose and control cable — p. 141
    • f. Cooler hoses installation — p. 144
    • g. Duct cover installation — p. 150
    • h Noise absorber and trims — p. 151
    • i. Labels — p. 153
    • j. Wire harness route — p. 155
    • k. Wireharness clamps for A/C version — p. 159
    • l. Parts identification of Air conditioner version — p. 161

Capabilities

The source outline indexes mechanism explanations, servicing instructions, troubleshooting, checking and adjustment, and maintenance tasks. Use these source-backed headings to locate the applicable task or system in the source PDF, then confirm model-specific notes, specifications, illustrations, and operating conditions at the relevant page before carrying out service work.

Keep the source's safety sequence, prerequisite steps, labels, units, configuration notes, and footnotes with the selected task; do not apply an isolated value outside the conditions stated in the manual.

Technical reference

Reference tables include service clearances for service checks, adjustment work, and specification lookup. Use the values and conditions in the PDF for the applicable model and procedure.

• Service limits and settings: service clearances.

Delivery

This manual is supplied as a digital PDF file and is available for instant download after purchase. No physical media is shipped.

References

Kubota Workshop Manual for Excavator, document code 97899-61520, PDF edition.