Komatsu PC300-8M0 PC300LC-8M0 PC350-8M0 PC350LC-8M0 Hydraulic Excavator Operation & Maintenance Manual

Description

Komatsu PC300-8M0, PC300LC-8M0, PC350-8M0, PC350LC-8M0 Hydraulic Excavator Operation & Maintenance Manual

This is the complete Operation & Maintenance Manual for the Komatsu PC300-8M0, PC300LC-8M0, PC350-8M0, and PC350LC-8M0 hydraulic excavators. Covering serial numbers PC300- C90001 and up and PC350- C90415 and up, this manual gives operators and maintenance personnel the full scope of procedures, safety requirements, and technical data needed to run and service these machines correctly. Whether you are performing daily checks, scheduled maintenance, or troubleshooting a fault, this document provides the detailed information that keeps the work accurate and safe.

File Details

• Manual Type: Operation & Maintenance Manual
• Brand: Komatsu
• Models Covered: PC300-8M0, PC300LC-8M0, PC350-8M0, PC350LC-8M0
• Language: English
• File Format: PDF
• Document Number: PEN00990C0-02
• Publication Date: August 2019
• Page Count: Approximately 417 pages

Chapters Covered

The manual is organized into the following major sections:

• Foreword and California Proposition 65 Warnings
• Safety Information – signal words, safety alert symbols, and general safety rules
• Introduction – use of machine, directions of machine, visibility, protective structure
• Product Information – serial number plates, engine serial number, service meter location
• Safety Labels – location of safety labels and detailed descriptions of each label
• General Precautions Common to Operation and Maintenance – fire prevention, getting on and off machine, protective structures, cab glass, attachments
• Precautions for Operation – jobsite investigation, high-voltage cables, visibility, starting engine, traveling, slopes, prohibited operations
• Precautions for Maintenance – warning tags, workplace cleanliness, stopping engine, working under machine, battery handling, high-temperature components, high-pressure oil, high-voltage precautions
• Machine Operations and Controls – walk-around checks, daily inspections, starting engine, warming up, machine operation, steering, swinging, work equipment controls
• Detailed Controls and Gauges – monitoring system, warning displays, gauges, meter displays, switches, air conditioner controls, radio
• Operation – machine operation, parking, transportation, cold weather operation, long-term storage, troubles and actions
• Maintenance – maintenance information, outline of service, wear parts, recommended fuel/coolant/lubricant, tightening torque specifications, safety critical parts
• Maintenance Schedule – initial 1000 hours, every 50/100/250/500/1000/2000/4000/5000/8000 hours maintenance
• Maintenance Procedure – detailed procedures for each maintenance interval
• Specifications – operating weight, engine output, dimensions, working ranges
• Attachments and Options – machine ready for attachment, hydraulic breaker, attachment guide, KOMTRAX
• Index

Beyond the chapter list, this manual functions as a complete service and operation reference for the PC300-8M0 and PC350-8M0 series. It walks through the hydraulic system warm-up procedure, the correct way to bleed air from the fuel system after running out of fuel, track tension adjustment, bucket tooth replacement, and how to handle the machine when it becomes stuck in mud. The troubleshooting section covers electrical, chassis, and engine problems with their likely causes and remedies, while the maintenance schedule tells you exactly what to service at every interval from 50 hours through 8000 hours. The specifications section provides digging reach, digging depth, digging height, and dumping heights, along with travel speeds and swing speed. For anyone maintaining a PC300-8M0, PC300LC-8M0, PC350-8M0, or PC350LC-8M0, this Komatsu operation and maintenance manual is the reference that ties all the procedures together.

Engine and Machine Coverage

The manual covers machines powered by the Komatsu SAA6D114E-3 diesel engine. Rated horsepower is shown as 194 kW {260 HP} at 1,950 rpm. The four covered models and their operating weights are:

• PC300-8M0: 31,100 kg (68,576 lb)
• PC300LC-8M0: 31,600 kg (69,678 lb)
• PC350-8M0: 32,600 kg (71,883 lb)
• PC350LC-8M0: 33,660 kg (74,220 lb)

Monitoring System and Warning Displays

A significant portion of the manual is dedicated to the machine monitor and its warning systems. The monitoring system section explains the standard screen, check before starting screen, maintenance interval warning screen, warning screens, and error screens. It details the action level monitor levels L01 through L04, what each level means for machine operation, and the exact remedy to apply. Alarm monitors are described in detail, covering engine coolant temperature, hydraulic oil temperature, fuel level, engine oil pressure, engine oil level, radiator coolant level, charge level, water separator, air cleaner clogging, and air conditioner system state. The manual explains how to use the occurred error list display switch, how to navigate the user menu, and how to adjust settings for the ECO guidance, machine settings, maintenance screen, monitor settings, and message display. This level of detail means you can interpret every warning the machine gives you and respond correctly.

Maintenance Procedures and Schedules

The maintenance section is built around a detailed schedule chart that begins with a one-time initial 1000-hour service and then continues through every 50, 100, 250, 500, 1000, 2000, 4000, 5000, and 8000 hours of operation. Each interval lists the specific procedures required, from greasing and lubrication through filter replacement, oil changes, and component inspection. The manual provides step-by-step procedures for replacing the fuel prefilter cartridge, fuel main filter cartridge, hydraulic oil filter element, engine oil filter cartridge, and hydraulic tank breather element. It covers checking and adjusting track tension, replacing bucket teeth for both vertical-pin and horizontal-pin types, replacing bucket side cutters and shrouds, adjusting bucket clearance, and checking gas spring condition. The cooling system cleaning procedure is fully described, including the coolant density table for selecting the correct mixture ratio for your climate.

Torque specifications are provided for standard metric bolts, hydraulic hoses, and specific components like track shoe bolts and swing circle bolts. The safety critical parts section lists the parts that must be periodically replaced regardless of visible condition, including fuel hoses, work equipment hoses, accumulators, and the seat belt, along with their replacement intervals. The wear parts list identifies every filter element, bucket tooth, and other consumable with its part number and change interval. This makes the manual a complete reference for keeping a PC300-8M0, PC300LC-8M0, PC350-8M0, or PC350LC-8M0 running reliably over its entire service life.

Attachments and Options

For machines equipped for attachment use, the manual explains the machine ready for attachment configuration, including the stop valve, selector valve, attachment control pedal, lock pin positions, breaker circuit additional oil filter, and accumulator. It provides the hydraulic circuit switching information for breaker mode and crusher mode, the correct working mode selection, and the oil flow adjustment procedures. The hydraulic breaker section covers main applications and prohibited operations, including how to avoid damage from incorrect chisel angle, pecking operations, and using the swing force. The attachment guide provides combination tables for buckets and track shoes, helping you select the right equipment for your work conditions.

Why This Manual Matters

With this Komatsu PC300-8M0, PC300LC-8M0, PC350-8M0, and PC350LC-8M0 operation and maintenance manual on hand, you can carry out the full range of scheduled maintenance procedures without guesswork. The manual specifies the exact fluid capacities, tightening torques, and service intervals, so you are not working from assumptions. The safety label section identifies every warning decal on the machine, which helps when replacing missing or damaged labels. The troubleshooting charts let you diagnose problems like slow travel speed, abnormal hydraulic oil temperature rise, engine oil pressure warnings, or starting motor issues and then take the correct action instead of guessing at the cause.

For machines working in cold conditions, the manual details the correct warm-up procedures for both the engine and the hydraulic equipment. The storage section covers what to do before, during, and after long-term storage. The transportation section explains loading and unloading procedures, lifting with a crane, and the correct transportation posture. The attachments section provides hydraulic circuit information for machines ready for breaker or crusher installation, including the correct working mode, lock pin positions, and oil flow settings. This is the information that prevents damage to the machine and keeps the work safe.

IMAGES PREVIEW

Instant PDF Delivery

This Komatsu PC300-8M0, PC300LC-8M0, PC350-8M0, and PC350LC-8M0 hydraulic excavator operation and maintenance manual is delivered as an instant PDF download. There is no physical book to wait for and no shipping cost. The file works on any device that can open a PDF, whether that is a computer, tablet, or smartphone, and you can print the pages you need for use in the workshop or at the machine. Having the manual accessible on site means you can reference the correct procedure immediately when a maintenance task or fault arises, rather than waiting for a physical book to arrive or searching through incomplete notes.