Case 1850K TIER 3 Crawler Dozer Repair Manual PDF

This repair manual covers the Case 1850K Tier 3 crawler dozer. It provides detailed technical information on the machine's major systems, including the engine, transmission, final drives, undercarriage, hydraulic equipment and electrical components. The manual explains system operation and includes troubleshooting instructions, service specifications, testing procedures and step-by-step repair information, supported by technical diagrams and illustrations.

The procedures are intended for qualified service personnel. Follow the manufacturer's instructions and use the specified special tools where required.

Service and Repair Coverage

The manual covers engine identification, technical specifications, engine removal and installation, radiator and silencer removal, and engine diagnostics using blink codes. The transmission section includes torque converter operation, hydraulic diagrams, pressure testing, stall tests, troubleshooting, disassembly, overhaul and reassembly procedures.

Final drive coverage includes removal, disassembly, bearing replacement, seal installation and assembly procedures. The undercarriage section provides inspection and adjustment instructions for track chains, tensioners, idlers, support rollers and bottom rollers, along with component replacement procedures and wear limits.

The hydraulic section explains the operation and servicing of the dozing equipment hydraulic system. It covers hydraulic pump testing, relief valve adjustment, hydraulic control valve overhaul, blade and ripper systems, cylinders, linkages and related components. Troubleshooting procedures and technical specifications support hydraulic system diagnosis and repair.

The electrical section covers the machine's wiring and protection systems, including fuses, relays, diodes, starting components, alternator, starter motor, instrument panel, monitor, sensors, display diagnostics and blade control pilot valve. Electrical diagrams and component information help with fault tracing and electrical repairs.

The manual also includes air conditioning system service instructions, technical data, refrigerant charging, leak inspection, troubleshooting and electrical schematics.

Table of Contents:

SECTION 0
GENERALITIES
TABLE OF CONTENTS
SUBJECT
SAFETY RULES
IDENTIFICATION DATA
Table of fluids used
Main dimensions 1850K BD
Main dimensions 1850K PAT
Technical data
1850K (LGP)
1850K (LTX/LT)
WEIGHT TABLE 1850K
LIST OF WEIGHTS FOR MAIN SERVICE COMPONENTS
STABILITY
GENERAL INSTRUCTIONS
TROUBLESHOOTING
UNITS OF MEASURE
TABLE OF TIGHTENING TORQUES

SECTION 1
ENGINE
TABLE OF CONTENTS
SECTION
SUBJECT
1.1 GENERAL SPECIFICATIONS
Identification of the engine
1.2 ENGINE DATA
1.3 DIAGRAMS ENGINE
1.4 ENGINE/CONVERTER REMOVAL AND INSTALLATION
Removal of engine group assembly
Removal of the radiator group
Removal of silencer group
Removal of converter group
Reinstalling the converter group
Reinstalling the silencer group
Reinstalling the radiator group
Reinstalling the engine group assembly
1.5 DIAGNOSTICS WITH BLINK CODE

SECTION 2
TRANSMISSION
TABLE OF CONTENTS
SECTION
SUBJECT
2.1 GENERAL DESCRIPTION
2.1.1 Transmission torque converter hydraulic diagram
Transmission housing/propeller shaft/torque converter
2.2 TROUBLESHOOTING
2.3 TESTS
2.3.1 Torque converter stall test
2.3.2 Delivery pressure test procedure
2.3.3 Procedure for the check of the converter safety valve pressure
2.3.4 Transmission gear shifting electric control valve
2.3.5 Positioning of diagnostic hoses
Transmission setting
2.4 PROCEDURES FOR THE REPAIR OF THE TORQUE CONVERTER
2.4.1 Disassembly
2.4.2 Reassembly
2.5 PROCEDURES FOR THE REPAIR OF THE TRANSMISSION
2.5.1 Removal
2.5.2 Re-Installation
2.5.3 Disassembly
2.5.4 Overhaul of the forward speed clutch
2.5.5 Overhaul of the 3rd speed
2.5.6 Overhaul of the reverse speed clutch
2.5.7 Modulating valves (Disassembly/Assembly)
2.5.8 Pressure relief valve (Disassembly/Assembly)
2.6 SPECIFICATIONS AND DATA
2.6.1 General data
2.6.2 Tightening torques (Torque converter)
Transmission housing
2.6.3 Transmission Data
Transmission Clutch
Transmission clutch discs
1st - 2nd - 3rd speed Transmission Clutch modulating valves
Lube oil pressure relief valve
Forward/reverse modulating valves
Transmission pressure relief and torque converter safety valve
Torque converter/transmission feeding pump
Oil filters
2.7 SPECIAL TOOLS

SECTION 3
FINAL DRIVES
TABLE OF CONTENTS
SECTION
SUBJECT
3.1 GENERAL DESCRIPTION
Final drive (Exploded view and sectional view)
3.2 REPAIR PROCEDURES
3.2.1 Final drive (Removal/Disassembly)
3.2.2 Pulling the housing cover
3.2.3 Driven gear (Bearing removal)
3.2.4 Driving gear shaft (Bearing removal)
3.2.5 Description of installation of front seals (Long life)
3.2.6 Final drive (Assembly)
3.3 SPECIFICATIONS AND DATA
Final drive shaft and bearing fittings
3.4 SPECIAL TOOLS

SECTION 5 UNDERCARRIAGE

TABLE OF CONTENTS
GENERAL DESCRIPTION
Generalities
Main components
TROUBLESHOOTING
INSPECTIONS
Inspection and adjustment of track chains
Setting of the track tensioner pressure relief valve
REPAIR PROCEDURES
Track chain (Removal/Installation)
Replacing a damaged link and reinstallation
Idler (Removal/Reinstallation/Overhaul)
Track chain tensioner spring (Removal/Installation)
Track chain support rollers (Removal/Installation/Overhaul)
Track chain bottom rollers (Removal/Installation/Overhaul)
SPECIFICATIONS AND DATA
Idler
Sprockets
Track chains
Bottom rollers
Support rollers
Track tensioner device
Front cross-member pivots
Wear limits
SPECIAL TOOLS

SECTION 6 DOZING EQUIPMENT HYDRAULIC SYSTEM

TABLE OF CONTENTS
GENERAL DESCRIPTION
Operation of the hydraulic system
TESTS
Troubleshooting using test equipment
Use of the electronic service tool
Procedure for setting the relief valve
REPAIR PROCEDURES
Hydraulic oil reservoir
Equipment hydraulic pump
Hydraulic control valve (Removal/Disassembly/Overhaul)
Blade
Ripper
SPECIFICATIONS AND DATA
Electro hydraulic control valve
Hydraulic power pump
Blade lifting cylinder ball joint
Blade lifting control cylinder
Blade Tilt control cylinder (Bulldozer version)
Ripper cylinder PD 180
Ripper cylinder RP 14F
Blade push arms and rods
Ripper linkage for L/TXL model
Ripper linkage for LGP model
Thrust arch and PAT blade
Blade angle cylinder (PAT version)
Blade tilt cylinder (PAT version)
SPECIAL TOOLS

SECTION 7 ELECTRICAL SYSTEM

TABLE OF CONTENTS
SAFETY RULES
ELECTRICAL DIAGRAM OF PROTECTION TREE
Fuses
"Link" fuses and cold starting fuse
Main switch
Engine starting switch
Back-up alarm
Starter motor
Alternator
Manual accelerator control potentiometer
Washer tank motor
Cab wiper motors
Implement/drivetrain safety levers
INSTRUMENT PANEL/MONITOR
Electrical diagram of instrument panel/monitor
MONITOR SENDERS
DISPLAY
Diagnosis on display
BUZZER
RELAYS - DIODES - FUSES
MAIN CONNECTORS 19 - 21 - 23 WAYS
Blade control pilot valve

SECTION 8 AIR CONDITIONING UNIT

TABLE OF CONTENTS
AIR CONDITIONING UNIT
Operating instructions
Technical data
Cab climate conditioner
Service precautions
Tool connections
Discharging
Refrigerant charging
Leak inspection
Special tools
Troubleshooting

Electrical Schematic 

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