Kubota M7040SU Tractor Workshop Service Manual

Kubota Tractor Model M7040SU
Publication: 9Y111-04240
Format: PDF
Language: English
Kubota M7040SU Tractor Workshop Manual – 407 Pages ( English Version)
Kubota M7040SU Tractor Workshop Manual – 416 Pages ( French Version)

Table of Content of the Workshop Service Manual

This Workshop Manual tells the servicing personnel about the mechanism, servicing and maintenance of the M7040SU and M7040DT-SU. It contains 4 parts: “Information”, “General”, “Mechanism” and “Servicing”.
Information
This section contains information below.
• Safety First
• Safety Decals
• Specification
• Dimension
General
This section contains information below.
• Engine Identification
• Model Identification
• General Precautions
• Maintenance Check List
• Check and Maintenance
• Special Tools
Mechanism
This section contains information on the structure and the function of the unit. Before you continue with the subsequent sections, make sure that you read this section.
Refer to the latest version of Workshop Manual (Code No. 9Y021-01870 / 9Y021-18200) for the diesel engine / tractor mechanism that this workshop manual does not include.
Servicing
This section contains information below.
• Troubleshooting
• Servicing Specifications
• Tightening Torques
• Checking, Disassembling and Servicing

Conventional thermostatically-controlled valves (outlet water temperature control type) open against the flow of coolant. In the M7040SU Tractor, the pressure (steam pressure + water pump’s discharge pressure) affects the open/close performance of such valve. In other words, the valve may be delayed in opening at a preset opening temperature opening suddenly, above the preset temperature. This is called the overshoot phenomenon.
The overshoot problem invites the undershoot phenomenon too. Too much water cooled by the radiator flows through the water passage, which suddenly closes the valve below the thermostat’s preset valve closing temperature.
A repeated cycle of such overshoot and undershoot phenomena is called the water temperature hunting.
This hunting problem may adversely affect the cooling system parts, and also the engine and its related components.
To cope with this trouble, the V3307 engine is equipped with the flow control thermostat. The valve has a notch to control the coolant flowrate smoothly in small steps.