CASE Construction CX20B, CX22B PM07-07001~, CX27B PV10-27001~ Crawler Excavator Shop Manual 9-91841 English

Official Manual Overview

Take absolute command over your CASE CX20B, CX22B, and CX27B Compact Excavators with this definitive OEM Shop Manual. Engineered for master technicians, this dual-purpose blueprint delivers dealership-level teardown procedures for both the machine chassis and its powertrain. It provides exhaustive internal rebuild data for the AP2D12LV3RS7 variable displacement axial piston pumps, BCV35-JAB10 multiple control valves, and MAG-18VP series travel motors, enforcing exact 23.0 MPa main relief valve calibrations. Uniquely, it also embeds the complete, unabridged factory overhaul documentation for the entire Yanmar TNV diesel engine family (spanning from the 3TNV82A up to the massive 4TNV106T). With micrometer-level metrology—such as the strict 42.902 mm wear limit for 3TNV82A crankpins and massive 188.0 Nm cylinder head fastening torques—alongside complete electrical schematic routing and rubber/steel crawler undercarriage wear registries, this guide is the ultimate weapon to eradicate diagnostic guesswork and restore your machine to absolute factory precision.

• Brands: CASE Construction
• Equipment Type: Crawler Excavator
• Manuals Type: Shop Manual
• Machine Model: CX20B, CX22B, CX27B
• Serial Number: PM07-07001~ (for CX20B / CX22B), PV10-27001~ (for CX27B)
• Region: N/R
• Book Code: 9-91841
• Issued: Printed by Studio ti - 2004.12
• Language: English
• Pages: 766
• File Format: PDF (Searchable)

Core Selling Points

• Granular Engine Metrology & Overhaul: Bypass generic engine manuals completely. This documentation embeds the unabridged factory teardown protocols for the Yanmar TNV diesel series (including 3TNV82A, 4TNV98, and 4TNV106T). It dictates uncompromising machining tolerances, specifying a strict 42.902 mm wear limit for the 3TNV82A crankpin outside diameter, enforcing a maximum 0.150 mm crankpin oil clearance, and mandating precise cylinder bore roundness limits of 0.03 mm.
• Mastering Fluid Power Dynamics: Execute dealership-level hydraulic calibrations with absolute certainty. The manual outlines strict benchmarking criteria, instructing mechanics to utilize a 49 MPa (7100 psi) test gauge at the G1/G2 PF1/4 ports to verify the P1 and P2 main relief valves are locked at exactly 23.0 MPa (3340 psi) with a designated 26.4 L/min flow rate.
• Uncompromising Structural Fastening: Reconstruct heavy-duty chassis and powertrain elements using exact factory torque metrics. The guide leaves zero room for sheer failure, demanding up to 1070 Nm (789 lbf-ft) for M36 coarse thread capscrews, 188.0 to 197.8 Nm for the 4TNV106(T) cylinder head bolts, and 83.4 Nm for the connecting rod hardware.

Features & Highlights

• Deep-Dive Electrical Topologies: Navigate the machine's nervous system with massive A3-sized fold-out schematics. The literature breaks down complex digital routing, detailing pin-by-pin terminal arrangements (such as the CN-101F and 3PAF-090H connectors) and mapping out specific wire color codes (like Light Green/Red [LgR] and Yellow/Black [YB]) to physically trace 12-volt continuity.
• Micro-Tolerance Drivetrain Teardown: Rebuild hydrostatic actuators and linkages without guesswork. The text provides step-by-step disassembly charts for the MSG-27P slewing motor and MAG-18VP travel motors, while strictly regulating wear limits—such as condemning slew motor shoe ball play if it exceeds 0.4 mm, and mandating bushing replacement if the dipper point pin clearance surpasses 1.0 mm (0.039 in).
• Proprietary Wear Registries & Tooling: Equip your shop with the exact parameters needed for precision machining. The manual specifies cylinder liner honing angles (30 to 40 degrees) and surface roughness values (Rmax 1.0 to 3.5S), while detailing the exact use of specialized jigs for press-fitting rod bushings.

Problem Solver

• Defeating Hydrostatic Degradation: Stop blindly replacing expensive planetary units. The guide empowers technicians to scientifically evaluate internal motor efficiency by measuring the casing drain volume. If the travel motor drain rate exceeds 3.0 Liters per 30 seconds under relief pressure, or if abnormal metal powder is found in the return filter, mechanics can pinpoint internal catastrophic failure before complete lockup.
• Eradicating Elusive Electrical Faults: Transform erratic electrical drops into calculated repair sequences. Using the provided diagnostic trees, technicians can trace a dead instrument cluster or missing fuel gauge readings directly to a blown No.6 fuse (indicating a short circuit to the frame), or verify ignition failures by measuring for exactly 0 ohms of resistance between the B and ACC terminals on the key switch.
• Isolating Attachment Power Loss: Systematically narrow down sluggish boom or arm movements. The troubleshooting flowcharts teach operators how to differentiate between a failing P1/P2 hydraulic pump, a stuck control valve spool, or internal cylinder piston bypass leakage, ensuring you only replace the specific component causing the pressure drop.

Important Pre-Purchase Advisories

• Complete Powertrain Integration: Unlike standard heavy equipment manuals, this comprehensive volume integrates the full Yanmar TNV Engine Service Manual directly into the chassis documentation. You will not need to source a separate engine blueprint.
• Fold-Out Schematic Location: Please note that the high-resolution, large-format electrical harness diagrams and hydraulic circuit maps (Fig. 71-1 through 71-14) are physically consolidated in the "Supporting Data" section at the very end of the publication for easier workbench reference.

• OUTLINE
  • GENERAL PRECAUTIONS FOR REPAIRS
    • PREPARATION BEFORE DISASSEMBLING
    • SAFETY IN DISASSEMBLING AND ASSEMBLING
    • DISASSEMBLING AND ASSEMBLING HYDRAULIC EQUIPMENT
    • ELECTRICAL EQUIPMENT
    • HYDRAULIC PARTS
    • WELDING REPAIR
    • ENVIRONMENTAL MEASURE
  • INTERNATIONAL UNIT CONVERSION SYSTEM
• SPECIFICATIONS
  • COMPONENTS NAME
  • MACHINE DIMENSIONS
  • TYPE OF CRAWLER SHOES
  • TYPE OF BUCKET
  • SPECIFICATIONS
  • ENGINE PERFORMANCE CURVE
• ATTACHMENT DIMENSIONS
  • BOOM
    • BOOM DIMENSIONAL DRAWINGS
    • BOOM MAINTENANCE STANDARDS
  • ARM
    • ARM DIMENSIONAL DRAWINGS
    • ARM MAINTENANCE STANDARDS
  • BUCKET
    • BUCKET DIMENSIONAL DRAWINGS
    • DETAIL DIMENSIONAL DRAWINGS OF LUG SECTION
  • DOZER
    • DOZER DIMENSIONAL DRAWINGS
    • DOZER MAINTENANCE STANDARDS
  • SWING
    • SWING BRACKET DIMENSIONAL DRAWINGS
    • SWING PORTION MAINTENANCE STANDARDS
• TOOLS
• STANDARD MAINTENANCE TIME TABLE
  • STANDARD WORKING TIME TABLE FOR THE MAINTENANCE OF EXCAVATOR
• MAINTENANCE STANDARDS AND TEST PROCEDURES
  • HOW TO USE MAINTENANCE STANDARDS AND PRECAUTIONS
  • PERFORMANCE INSPECTION STANDARD TABLE
    • STANDARD VALUE TABLE
  • MEASURING ENGINE SPEED
    • ENGINE SPEED MEASUREMENT
  • MEASURING HYDRAULIC OIL PRESSURE
• HYDRAULIC SYSTEM
  • SUMMARY
    • FUNCTION AND FEATURES OF HYDRAULIC CIRCUIT
  • HYDRAULIC CIRCUITS AND COMPONENT MODELS
  • HYDRAULIC CIRCUIT OPERATION
    • COLOR CODING STANDARD FOR HYDRAULIC
    • NEUTRAL CIRCUIT
    • TRAVEL OPERATING CIRCUIT
    • SLEW OPERATING CIRCUIT
    • BUCKET OPERATING CIRCUIT
    • BOOM OPERATING CIRCUIT
    • ARM OPERATING CIRCUIT
    • SWING OPERATING CIRCUIT
    • DOZER OPERATING CIRCUIT
    • TRAVEL / DOZER COMBINED OPERATING CIRCUIT
    • TRAVEL / BOOM COMBINED OPERATING CIRCUIT
    • NIBBLER & BREAKER OPERATING CIRCUIT
• ELECTRICAL SYSTEM
  • HOW TO READ CIRCUIT DIAGRAM AND HARNESS CONNECTION
    • ELECTRIC CIRCUIT DIAGRAM
    • HARNESS CONNECTION
  • ELECTRICAL EQUIPMENT & HARNESS
    • ELECTRICAL EQUIPMENT LIST
    • HARNESS & CABLE LIST
    • ARRANGEMENT DRAWING FOR COMPONENTS & HARNESS
• COMPONENTS SYSTEM
  • HYDRAULIC COMPONENTS
    • HYDRAULIC PUMP
    • PILOT VALVE (ATT)
    • PILOT VALVE (TRAVEL)
    • CONTROL VALVE
    • SLEWING MOTOR
    • TRAVEL MOTOR
    • SWIVEL JOINT
    • CYLINDER
  • ELECTRICAL EQUIPMENT
    • ELECTRICAL EQUIPMENT LIST
    • SPECIFICATIONS ELECTRICAL EQUIPMENT
• GENERAL DISASSEMBLY AND ASSEMBLY
  • GENERAL DISASSEMBLY AND ASSEMBLY
    • CONTENTS OF GENERAL DISASSEMBLY AND ASSEMBLY
    • SPECIFICATION OF TIGHTENING TORQUE
• ATTACHMENTS
  • REMOVING AND INSTALLING
    • ATTACHMENT ASSEMBLY AND NAME
    • BUCKET
    • ARM
    • BOOM
    • SWING
    • DOZER
  • DISASSEMBLING AND ASSEMBLING
    • CYLINDER
• UPPER SLEWING STRUCTURE
  • REMOVING AND INSTALLING
    • CANOPY / CAB
    • GUARD (COVER)
    • FLOOR PLATE ASSEMBLY
    • BATTERY
    • COUNTERWEIGHT
    • PUMP
    • CONTROL VALVE
    • SOLENOID VALVE
    • FUEL TANK
    • HYDRAULIC OIL TANK
    • AIR CLEANER
    • GENERATOR
    • MUFFLER
    • CONTROL STAND
    • STARTER
    • RADIATOR
    • ENGINE
    • PILOT VALVE
    • SLEWING MOTOR
    • SWIVEL JOINT
    • UPPER FRAME
  • DISASSEMBLING AND ASSEMBLING
    • HYDRAULIC PUMP
    • CONTROL VALVE
    • PILOT VALVE (ATTACHMENT)
    • PILOT VALVE (TRAVEL)
    • SLEWING MOTOR
    • SWIVEL JOINT
• TRAVEL SYSTEM
  • REMOVING AND INSTALLING
    • NAME OF TRAVEL SYSTEM PARTS
    • CRAWLER
    • SLIDE PLATE AND UPPER ROLLER
    • LOWER ROLLER
    • FRONT IDLER
    • IDLER ADJUSTER
    • SPROCKET
    • TRAVEL MOTOR
    • SLEWING BEARING
  • DISASSEMBLING AND ASSEMBLING
    • TRAVEL MOTOR
• TROUBLESHOOTING
  • HYDRAULIC SYSTEM
  • ELECTRICAL SYSTEM
  • ENGINE
    • TROUBLE DIAGNOSIS: ENGINE
    • ELECTRICAL EQUIPMENT
      • ELECTRICAL EQUIPMENT LIST
• ENGINE
  • GENERAL
  • INSPECTION AND ADJUSTMENT
  • TROUBLESHOOTING
  • DISASSEMBLY, INSPECTION AND REASSEMBLY OF ENGINES
  • LUBRICATION SYSTEM
  • COOLING SYSTEM
  • FUEL INJECTION PUMP/GOVERNOR
  • TURBOCHAGER: DISASSEMBLY, INSPECTION AND REASSEMBLY
  • STARTING MOTOR
  • ALTERNATOR
  • ELECTRIC WIRING
  • SERVICE STANDARDS
  • TIGHTENING TORQUE FOR BOLTS AND NUTS
• SUPPORTING DATA
  • ELECTRIC CIRCUIT DIAGRAM