Komatsu PC800-8 PC850-8 Hydraulic Excavator Shop Manual – SEN00373-03 PDF

Description

Komatsu PC800-8, PC800SE-8, PC800LC-8, PC850-8 & PC850SE-8 Hydraulic Excavator Shop Manual

This is the complete Komatsu shop manual for the PC800-8 and PC850-8 series hydraulic excavators, published under form number SEN00373-03. It covers five machine variants — PC800-8, PC800SE-8, PC800LC-8, PC850-8, and PC850SE-8 — and spans more than 1,000 pages of specifications, system explanations, testing procedures, troubleshooting trees, and step-by-step disassembly and assembly instructions.

Every major system on the machine is documented: the Komatsu SAA6D140E-5 engine, the HPV375+375 main hydraulic pump, the LPV90 cooling fan pump, the KMF125AB-5 swing motor, the MSF-340VP-EH travel motor, the 5-spool and 4-spool control valves, and the full electrical and monitoring architecture. Whether you are diagnosing a fault code, rebuilding a final drive, or looking up a tightening torque, this manual is the single reference the workshop procedure was built around.

File Details

• Manual type: Shop Manual (Service & Repair)
• Brand: Komatsu
• Models covered: PC800-8, PC800SE-8, PC800LC-8, PC850-8, PC850SE-8
• Engine: Komatsu SAA6D140E-5
• Document number: SEN00373-03
• Language: English
• File format: PDF
• Pages: 1,041
• Publication year: 2006

Chapters Covered

• 00 — Index and Foreword: Safety notice, how to read the shop manual, maintenance standard terminology, handling electric equipment and hydraulic components, electric wire code, push-pull coupler procedures, standard tightening torque tables, conversion tables
• 01 — Specification: Specification drawings, working range drawings, full machine specifications, weight tables, fuel/coolant/lubricant tables
• 10 — Structure, Function and Maintenance Standard: Engine and cooling system, coupling and lubrication, radiator and oil cooler; Power train — swing machinery, swing circle, final drive, sprocket; Undercarriage and frame — track frame, recoil spring, idler, carrier roller, track roller, track shoe, double shoe; Hydraulic system Part 1 — hydraulic tank, filter, main pump, pump control mechanism, EPC valve, self pressure reducing valve, cooling fan pump and motor; Hydraulic system Part 2 — grease pump, return/line/drain oil filters, L.H. 5-spool and R.H. 4-spool control valves, straight-travel valve, swing motor, center swivel joint, travel motor, PPC accumulator, work equipment/swing PPC valve, travel PPC valve, solenoid valve, hydraulic cylinder; Work equipment; Cab and attachments; Electrical system — engine control, electric control system, monitor system, sensors
• 20 — Standard Value Table: Standard service values for engine and chassis
• 30 — Testing and Adjusting: Tools, engine speed, boost pressure, exhaust gas temperature and color, valve clearance, compression pressure, blow-by pressure, engine oil pressure, fuel system handling and pressure, fuel return rate and leakage, air bleeding, belt tension; swing circle bearing clearance, track shoe tension, circuit oil pressures, control circuit pressure, main pump control pressure; PPC valve output pressure, solenoid valve and swing priority selector valve pressures, work equipment/swing PPC valve adjustment, travel deviation, hydraulic drift inspection, fan speed and circuit pressures, fan pump EPC current, oil leakage measurement, residual pressure release, air bleeding, diode inspection; machine monitor special functions, engine controller high voltage circuit; KOMTRAX terminal procedures, electrical troubleshooting preparation, Pm-clinic service
• 40 — Troubleshooting: General troubleshooting information; Troubleshooting by failure code (Parts 1–3) covering hundreds of displayed codes from A000N1 through DY2EKB; E-mode electrical system troubleshooting; H-mode hydraulic and mechanical system troubleshooting; S-mode engine troubleshooting
• 50 — Disassembly and Assembly: General information, coating materials, special tools; Engine and cooling system (Parts 1 & 2) — engine, PTO, hydraulic pump, cooling assembly, aftercooler, fuel cooler, fan motor, fuel tank, fuel supply pump, cylinder head, fuel injector, front and rear seals; Power train — PTO coupling, swing motor and machinery, swing circle, final drive; Undercarriage and frame — track shoe, link repair, idler, recoil spring, carrier roller, track roller, revolving frame, counterweight; Hydraulic system — hydraulic tank, main pump, input shaft oil seal, cooling fan pump, control valve, swing motor, center swivel joint, travel motor, solenoid valve, boom damping valve, PPC valves, hydraulic cylinder; Work equipment — bucket, arm, and boom cylinders, bucket, arm, boom, work equipment assembly; Cab and attachments — operator’s cab, cab glass, front window; Electrical system — air conditioner unit, engine controller, monitor assembly, pump controller, KOMTRAX terminal
• 90 — Diagrams and Drawings: Hydraulic circuit diagram, electrical circuit diagrams (5 sheets)

This shop manual was written for the technician who needs the whole picture — not just a torque figure or a fault-code lookup, but the system description that explains why a symptom occurs, the test procedure that confirms it, and the disassembly sequence that gets the component out and back together correctly. The structure/functions sections explain how each valve, motor, and pump actually works; the testing and adjusting sections tell you what to measure and what the reading should be; and the disassembly and assembly sections cover the order of operations, special tools required, coating materials, and tightening torques for each component.

Coverage by Machine

The five covered variants share the same SAA6D140E-5 engine and much of the hydraulic architecture, but differ in operating weight, bucket capacity, digging reach, and undercarriage configuration. The manual includes model-specific specifications, working ranges, and weight tables for each, so you can confirm which values apply to the exact machine on the shop floor.

Who This Manual Is For

This shop manual is aimed at professional diesel and heavy-equipment technicians, shop foremen, and owners who maintain their own machines. The troubleshooting and failure-code sections are detailed enough to guide fault isolation without guesswork, and the disassembly and assembly procedures are complete enough to support full component rebuilds. Because the manual covers five model variants with different working ranges and component arrangements, always confirm the machine’s serial number and model against the applicable section before starting a job.

Get the Complete Komatsu PC800-8 / PC850-8 Shop Manual

Everything a technician needs to service, diagnose, and repair the Komatsu PC800-8 and PC850-8 series excavators is in this 1,000+ page shop manual. You get the complete specification tables, the full troubleshooting trees by failure code, the testing and adjusting procedures, the hydraulic and electrical diagrams, and the step-by-step disassembly and assembly instructions for every major system on the machine.

IMAGES PREVIEW

This is a digital PDF download — no physical shipment, no waiting. After payment the file is available immediately, and you can open it on any laptop, tablet, or phone in the workshop, or print the pages you need for the job at hand. Having the correct procedures and the exact specifications in front of you is what separates a repair that lasts from one that comes back. Get the manual, get the numbers, and get the machine back to work.