Kobelco LK850-II Wheel Loader Shop Manual (S5RJ0002E)

Kobelco LK850-II Wheel Loader Service Manual (S5RJ0002E)

This service repair manual provides detailed factory procedures for safe inspection, maintenance, diagnostics, and overhaul of the Kobelco LK850-II wheel loader. All technical content below is based strictly on the manual’s Table of Contents, covering specifications, maintenance standards and test procedures, working standards, complete system chapters, and in-depth component overhaul sections for hydraulic, drive, steering, brake, electric, and transmission systems.

Model Covers:

Kobelco LK850-II Wheel Loader

Note: Applies exclusively to the Kobelco LK850-II model. Includes full specifications with component names, outline dimensions, engine data and performance curves, comprehensive weight charts, hydraulic pressure and flow tests, cylinder speed and oil-tightness checks, transmission stall and clutch pressure tests, tightening torque tables, conversion charts, complete system coverage, and detailed construction, disassembly, assembly, maintenance standards, and troubleshooting for major components.

File Format: PDF

Size: 76.08 MB

No. of Pages: 543

Language: English

Quality: Readable text, low-quality images

Delivery Method: Instant Download – Access your file immediately after purchase.

📑 Included Sections:

Specifications & General Data

• Names of components and outline dimensions
• Main machine specifications
• Engine data and performance curves
• Component locations and general machine data

Main Components Weight

• Operation weight and attachment weight
• Frame-related components
• Cab and canopy related components
• Drive system components
• Hydraulic system components
• Battery weight data

Maintenance Standards & Test Procedures

• How to interpret performance standards
• Hydraulic oil pressure measurement and relief pressure adjustment
• Measurement of boom, bucket, and steering cylinder speeds
• Hydraulic cylinder oil-tightness tests
• Hydraulic pump oil flow test
• Transmission stall tests and result evaluation
• Measurement of transmission main and clutch oil pressures

Working Standards

• Tightening torque tables for cap screws, nuts, and hydraulic joints
• Metric and unified thread torque standards
• Conversion tables for temperature, length, pressure, flow rate, torque, and speed

Drive System

• Location of main components and power transmission
• Construction of engine, transmission, drive shafts, and axles
• Transmission control and engine control systems
• Removing and installing engine, transmission, drive shafts, and axles
• Disassembly, inspection, assembly, and troubleshooting

Hydraulic System

• Hydraulic circuit and system operation
• Removal and installation of hydraulic pump, control valve, relief valve, pilot valve
• Boom and bucket cylinder service
• Hydraulic oil tank maintenance and flushing
• System troubleshooting

Boom Linkage & Pivot Pin

• Boom linkage construction, disassembly, inspection, and assembly
• Center pivot pin construction and servicing
• Troubleshooting procedures

Steering System

• System outline and operation
• Hydraulic pump, steering valve, orbitrol, stop valve servicing
• Steering cylinder removal and installation
• Troubleshooting

Brake System

• Main component locations and piping
• Service brake: air reservoir, brake valve, power cluster, disk brake, air governor, air dryer
• Purging air from brake system
• Parking brake: linkage, solenoid valve, brake chamber, assembly
• Service and parking brake troubleshooting

Electric System

• Electric system diagrams and wiring tables
• Locations of main components and wire harness connections
• Specifications of monitors, controllers, switches, and sensors
• Bucket leveler, boom kick-out, proximity switch systems
• Air conditioner, heater, and emergency steering system
• Removal, disassembly, and troubleshooting of check & safety monitor

Hydraulic Pump

• Construction, function, and specifications
• Pressure compensation mechanism
• Oil seal replacement procedures
• Internal disassembly and assembly
• Maintenance standards, test procedures, and troubleshooting

Orbitrol

• Construction and operating function
• Specifications
• Disassembly and assembly with necessary tools
• Troubleshooting

Control Valves

• Main control valve: construction, function, specifications
• Disassembly, inspection, assembly of control and relief valves
• Pilot control valve: construction, function, disassembly, cleaning, assembly
• Pressure adjustment and troubleshooting

Steering & Stop Valves

• Steering valve construction, operation, and hydraulic circuits
• Relief valve disassembly and pressure adjustment
• Stop valve construction, specifications, disassembly, and assembly
• Troubleshooting for valve assemblies

Hydraulic Cylinders

• Cylinder construction
• Disassembly, cleaning, inspection, measurement, and repair
• Maintenance standards and assembly
• Tool lists and troubleshooting

Transmission

• Outline, specifications, and construction
• Torque converter and speed change mechanism
• Parking brake, PTO, and hydraulic system
• Handling, checking, maintenance, and stall tests
• Overhaul guide, disassembly, wear limits, and assembly of clutches and gears
• Main pressure and clutch pressure measurement
• Troubleshooting

Axles & Differentials

• Axle construction and power transmission
• Differential and planetary reduction gears
• Wheel hub planetary assembly disassembly and assembly
• Differential assembly service
• Nospin differential (option) construction and servicing
• Maintenance standards, tightening torques, and troubleshooting

Tires

• Tire construction, sizes, and rim types
• Hydro-inflation and ballast volume
• Adding and removing liquid ballast
• Tire inspection, air pressure, storage, and service life estimation
• Troubleshooting

Brake Valve, Power Cluster & Air Dryer

• Brake valve (air application valve): construction, specifications, disassembly, assembly
• Power cluster: structure, operation, specifications, maintenance, troubleshooting
• Air dryer: construction, removal, disassembly, assembly, inspection, troubleshooting

This Kobelco LK850-II Service Manual is a complete factory reference for accurate diagnostics, maintenance, system adjustment, and full component overhaul of the LK850-II wheel loader.