5-2 Lower Mechanism: Travel Drive Unit 6. Assembly of the Motor [1] Precautions for the assembly of the motor Read the following precautions carefully prior to start assembling the motor. 1. 2. 3. 4.
5. 6. 7.
8. 9. 10. 11. 12. 13. 14.
When starting the assembly operation, be sure to wear safety shoes and other protective gear. When assembling the motor, use the specified tools. In order to prevent injuries during the disassembly work, prepare a stable workbench that is about waist height, and perform the disassembly on the workbench. The motor is comprised of precision components. As such, any attachment of foreign matter must be avoided. Assemble the motor in a dust-free room to prevent the components from becoming contaminated with soil or dust. The motor is comprised of precision components. Any denting or damaging of its surface must be avoided. While handling motor components in the assembly process, be fully attentive not to dent or damage them. Be sure to repair all damage detected in the disassembly process. Prepare all replacement parts needed beforehand, and then start assembling. Remove metal chips and foreign matter from all parts and check that all parts are free from burrs and indentations before starting the assembling procedure. When detecting burrs or indentations, provide remedies by using a whetstone. In the assembling procedure, apply clean hydraulic oil on respective sliding sections and rolling sections prior to the assembly work. Fully degrease sections where a screw lock agent and liquid packing are applied and remove water prior to the assembly work. Replace O-rings, backup rings and other sealing parts with new ones. In the assembling procedure, take care not to allow O-rings and backup rings to be damaged. When assembling O-rings and backup rings, apply a small amount of grease before assembling. When assembling, it is helpful to use vaseline, grease, etc., to prevent fall of parts involved. Tighten bolts up to the torque specifications shown in Table 4 in Chapter 5, section 2 in the respective joins. Control tightening torque using a torque wrench. After completing the assembly, stop all ports in order to block dust intrusion into the inside of the motor.
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