Komatsu PC490LC-11 Hydraulic Excavator Field Assembly Instructions PDF – Serial 85001 and Up

Description

Komatsu PC490LC-11 Field Assembly Instructions PDF

This PDF is the field assembly instruction set for the Komatsu PC490LC-11 hydraulic excavator, serial numbers 85001 and up. Because the machine is shipped in divided units, the document explains how to assemble those units into the complete machine in the field. It covers the chassis, work equipment, track frame gauge changes, counterweight installation, hydraulic circuit flushing, torque checks, and the final field assembly inspection report. The manual is written for assembly supervisors, crane directors, mechanics, and operators working together on a large excavator assembly site.

File Details

• Manual type: Field Assembly Instructions
• Brand: Komatsu
• Model: PC490LC-11
• Engine model: SAA6D125E-7
• Serial numbers: 85001 and up
• Language: English
• Page count: 134
• File format: PDF
• Document number: GEN00126-01

Chapters Covered

• A. Assembly of chassis
• B. Assembling of work equipment
• C. Increasing and decreasing of track frame gauge, assembling of counterweight
• M. Procedure for inspection and maintenance after completion of assembly
• Mounting bolt torque check sheet
• Field assembly inspection report (Backhoe)

A. Assembly of chassis

This chapter covers the first installation work on the machine body. It includes installation of the climbing step, handrail, mirror, tail pipe, and tail pipe cover. These steps prepare the chassis for safe access and for the later work equipment assembly, and the chapter shows the mounting points, bolt tightening, and mirror adjustment needed so the operator can see around the machine.

B. Assembling of work equipment

This is the largest section of the Komatsu PC490LC-11 field assembly instructions. It begins with boom cylinder installation, releasing remaining pressure in the hydraulic circuit, and installing the boom cylinder hoses. It then moves through the boom cylinder top pin, boom assembly, hoses from chassis along top of boom, boom cylinder head connection, arm assembly, bucket cylinder hoses, bucket installation, work equipment grease piping, wiring, greasing after completion, and bleeding air from the work equipment circuit. The procedures include pin insertion, shim selection, O-ring fitment, hose routing, and torque checks.

C. Increasing and decreasing of track frame gauge, assembling of counterweight

This chapter explains how to widen or narrow the track frame gauge for transport and assembly conditions. It covers increasing and decreasing the gauge, installing steps, travel piping covers, adjusting track tension, sticking the sheet to the counterweight, installing the camera, and installing the counterweight. The counterweight procedure includes mounting bolt torque and clearance/level difference checks around the revolving frame and doors.

M. Procedure for inspection and maintenance after completion of assembly

After assembly, this section covers replacement of the return filter from standard to flushing filter, flushing of the hydraulic circuit, replacement back to the standard filter, checking oil and coolant levels, inspecting hydraulic tank oil level and refilling, touching up parts after field assembly, and checking error codes. It is the final quality and readiness stage before the machine is put into service.

Mounting bolt torque check sheet and field assembly inspection report

The PDF ends with a mounting bolt torque check sheet and a field assembly inspection report for the backhoe configuration. These pages list important bolt torque checks for boom foot, boom cylinder bottom, counterweight, and center frame to crawler frame connections, plus a structured inspection report for documenting the completed assembly.

Put the Komatsu PC490LC-11 Together the Right Way

This Komatsu PC490LC-11 field assembly instructions PDF gives your crew the exact sequence for turning shipped components into a complete hydraulic excavator. It supports safe assembly planning, correct pin and shim fitment, hydraulic hose connection without damaging O-rings, track gauge adjustment, counterweight mounting, circuit flushing, and final inspection. For any workshop or dealer team handling a PC490LC-11 serial 85001 and up, these instructions help avoid costly damage during assembly and help ensure the machine is ready for safe operation. The PDF is delivered instantly after payment, can be viewed on any device, and can be printed for use in the workshop or on site. No shipping and no waiting for a physical book.

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