CASE Construction CX31B PW11-30001~, CX36B PX12-11001~ Crawler Excavator Shop Manual 9-91741 English

Official Manual Overview

Unleash the full diagnostic and rebuild potential of your CASE CX31B and CX36B Compact Excavators with this ultimate OEM Shop Manual. Engineered for professional mechanics, this master blueprint thoroughly maps out the machine's entire anatomy, featuring deep-level hydraulic flow calibration for the AP2D18LV3RS7 variable displacement axial piston pumps and BCV35-JAA10 10-spool control valves. Uniquely, this volume seamlessly integrates an exhaustive Engine Overhaul section dedicated to the Yanmar TNV-Series diesel powerplants (covering models from the 3TNV82A up to the 4TNV106T), delivering micrometer-level tolerances for crankshaft journals, piston rings, and injection pump timing. Whether you are rebuilding the GM04VA hydrostatic travel motors, decoding complex electrical matrices for Hitachi starters and alternators, or verifying micro-clearances on the slew bearing, this uncompromising technical guide eliminates all diagnostic guesswork and restores absolute factory precision to your crawler undercarriage and fluid power systems.

• Brands: CASE Construction
• Equipment Type: Crawler Excavator
• Manuals Type: Shop Manual
• Machine Model: CX31B, CX36B
• Serial Number: PW11-30001~ (for CX31B), PX12-11001~ (for CX36B)
• Region: N/R
• Book Code: 9-91741
• Issued: Printed by Studio ti - 2004.12
• Language: English
• Pages: 770
• File Format: PDF (Searchable)

Core Selling Points

• Integrated Yanmar TNV Engine Metrology: Do not rely on external powertrain guides. This master documentation fully incorporates the deep block reconstruction for the Yanmar TNV diesel series (covering models from 3TNV82A through 4TNV106T). It mandates uncompromising machining tolerances, specifying a strict 42.902 mm wear limit for the 3TNV82A crankpin outside diameter, exact 0.150 mm crankpin oil clearance limits, and condemning cylinder bores if the roundness exceeds 0.03 mm.
• Precision Fluid Power Calibration: Restore absolute breakout force to your compact excavator. The manual details exact tuning protocols for the AP2D18LV3RS7 variable displacement axial piston pumps and the BCV35-JAA10 control valves. Technicians are instructed to verify P1 and P2 main relief valves at exactly 23.0 MPa (3340 psi) with a 38.4 L/min flow rate, while locking the pilot relief pressure to a highly stable 3.5 ± 0.4 MPa (508 ± 58 psi).
• Extreme Hydraulic Cylinder & Drivetrain Fastening: Rebuild heavy-duty structural actuators with factory certainty. The text leaves zero room for structural failure, enforcing massive tightening specifications such as 1590 Nm for the dozer cylinder piston assembly, 1240 Nm for the swing cylinder, and 1150 Nm for the boom cylinder head. It further details the GM04VA travel motor assembly, requiring a strict 107 N·m (78.9 lbf·ft) torque for the M12 mounting capscrews utilizing Loctite #262.

Features & Highlights

• Pin-Out Matrices & Circuit Tracing: Take total control of the machine’s electrical nervous system. The guide maps out exact wire color codes (like LgR, LB, and WG) and connector interfaces. It enables mechanics to physically trace 12-volt continuity, such as verifying the white-black harness at connector CN-1F for travel 1&2-speed selector switches, or checking the white and pink harness to diagnose hourmeter failures.
• Verified Component Overhaul Data: The guide breaks down the complete mechanical disassembly of the machine's exact core components. It walks you through the step-by-step teardown of the GM04VA travel motor, the MSG-27P-16E-17 slewing motor, and the rotary swivel joint, complete with proprietary jig tooling references (such as the FS3 floating seal inserting jig).
• Undercarriage Wear Registries: Navigate crawler chassis repairs with absolute dimensional accuracy. The guide provides an exhaustive steel crawler (track link) wear matrix, demanding the replacement of track links if the pitch exceeds the 107 mm (4.24 in) service limit, and condemning rubber crawlers if lug projection hits 0 mm.

Problem Solver

• Symptom-Based Flowchart Diagnostics: Transform erratic machine behavior into a calculated repair sequence. The literature provides extensive troubleshooting trees to systematically isolate issues like "Travel speed is slow", "Attachment operating power is low", or engine "Hunting" and "Excessive fuel consumption" without blind parts replacement.
• Resolves Severe Undercarriage Binding: Navigate hydrostatic travel failures scientifically. By referencing the detailed testing flowcharts, technicians can evaluate the travel reduction unit by inspecting the return filter for metal powder and verifying the movement of the 2-speed change spool, pinpointing internal motor failures before catastrophic planetary gear destruction occurs.
• Eradicates Phantom Electrical Drops: Stop throwing expensive components at dead control panels. Utilizing the electrical testing matrices, mechanics can trace missing gauge cluster functions or working light failures directly to blown No.3 fuses, short-circuits to the frame, or trace deceleration faults directly to the yellow-green harness at the CN-113F connector of the decel motor (M-4).

Important Pre-Purchase Advisories

• Two-In-One Manual Coverage: This specific Shop Manual is an expansive, highly valuable reference. It includes both the complete hydraulic, undercarriage, and electrical system diagnostics for the CX31B/CX36B excavators, AND the unabridged, deeply technical engine overhaul section for the entire Yanmar TNV Series diesel engines.
• Schematic Notice: The manual references large-format hydraulic and electrical circuit diagrams (designated as Fig. 71-3 through 71-13) which are fully integrated into the "Supporting Data" section at the end of the volume.

Table of Contents

• 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
  • DIPPER
    • DIPPER DIMENSIONAL DRAWINGS
    • DIPPER 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
• ELECTRICAL SYSTEM
  • HOW TO READ CIRCUIT DIAGRAM AND HARNESS CONNECTION
    • ELECTRIC CIRCUIT DIAGRAM
  • ELECTRICAL EQUIPMENT & HARNESS
    • ELECTRICAL EQUIPMENT LIST
    • HARNESS & CABLE LIST
    • ARRANGEMENT DRAWING FOR COMPONENTS & HARNESS
• COMPONENTS SYSTEM
• 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
  • 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