Cart: 0
Cart 0
9-93150NA_01

CASE Construction 21D, 121D, 221D, 321D Wheel Loader Technical Handbook 9-93150NA English

$ 18.99 USD
View More

Official Manual Overview

Maximize the uptime and overhaul precision of your CASE 21D, 121D, 221D, and 321D Wheel Loaders with this definitive OEM Technical Handbook. Moving far beyond basic preventative maintenance, this comprehensive master reference delivers dealership-level diagnostic and teardown protocols for both standard and high-speed machine configurations. It extensively details the powertrain, integrating crucial performance metrics for the Deutz F4M 2011 direct-injection diesel engines alongside deep-level calibrations for the hydrostatic drivetrain—including the A4VG56DA1D2 variable displacement pumps and A6VM80HA1U1 motors. Uniquely, this volume embeds the complete, unabridged factory repair manuals for the heavy-duty Carraro planetary axles (covering front/rear models like the 28.16 FR, 28.25 FR, and 28.20 with TB150/TB138.5 transmission boxes). Featuring extensive hydraulic circuit routing, inching/braking pressure thresholds, and precise torque specifications, this technical guide is the ultimate weapon to eliminate diagnostic guesswork and restore absolute factory functionality to your loader.

  • Brands: CASE Construction
  • Equipment Type: Wheel Loader
  • Manuals Type: Technical Handbook
  • Machine Model: 21D, 121D, 221D, 321D
  • Serial Number: N/R
  • Region: N/R
  • Book Code: 9-93150NA
  • Issued: N/R
  • Language: English
  • Pages: 860
  • File Format: PDF (Searchable)

Core Selling Points

  • OEM Carraro Axle Reconstruction: Stop guessing on planetary teardowns. This manual integrates the complete, unabridged factory repair instructions for the 28.16, 28.20, and 28.25 FR axles. It dictates absolute precision for the pinion group, requiring technicians to set the pinion bearing preload to exactly 9.2÷13.7 daN (measured on D=34.8 mm) using the CA119099 wrench and CA715022 retainer to properly crush the new collapsible spacer.
  • Dynamic Hydrostatic Calibration: Restore peak tractive effort to your wheel loader. The guide maps out exact testing parameters for the variable displacement pumps and motors, demanding a hydraulic oil temperature of 60 - 70°C. Technicians are instructed to verify the travel drive feed pressure at exactly 27 +5/-2 bars (at 2500 rpm), ensure regulation starts at 1100 rpm, and confirm the high-pressure (HP) valve opens strictly at 465 bars.
  • Uncompromising Fastening Specifications: Rebuild heavy-duty chassis and powertrain elements with absolute structural certainty. The literature enforces massive tightening metrics across the machine, demanding 500 Nm for the A 20-8 wheel-nuts, 350 Nm for the M20 front axle mounting capscrews, and a strict 250 Nm for fastening the hydrostatic variable displacement pump.

Features & Highlights

  • Deep-Dive Hydraulic Topologies: Navigate complex fluid power circuits with crystal-clear schematics for both standard and high-speed configurations. The blueprints map out exactly how to trace pressure drops, detailing specific measuring ports like PHD (Travel high pressure), Pin (Inching pressure), and identifying the flow path through the L6 priority valve and T7 distributor block.
  • Inching & Brake Circuit Diagnostics: Master the electro-hydraulic braking systems. The manual details the exact operational thresholds, such as verifying the pump accumulator charging valve cuts in at 100 bars and cuts out at 150 bars, and checking the B6 brake pressure switch for a precise 3.5 bar normally-open response.
  • Attachment Performance Benchmarks: Instantly evaluate pump and cylinder health without unnecessary teardowns. The text provides strict hydraulic stroking times for an empty bucket—such as 6.3 seconds for lifting, 3.2 seconds for lowering, and 1.2 seconds for tipping on the 321D—allowing mechanics to quickly isolate flow restrictions.

Problem Solver

  • Eradicates Erratic Steering & Braking: Systematically troubleshoot dangerous control issues. If the machine brakes abruptly, the manual guides you to reduce pressure via the setscrew under the pedal while monitoring the gauge. If steering pressure fails to reach 175 bars, the diagnostic logic teaches you to check the main 230 bar working pressure first to accurately condemn either the L4 primary steering valve or the main gear pump.
  • Defeats Hydrostatic Power Loss: Transform sluggish acceleration into calculated repair steps. By tapping into the specified M1 and X1/X2 adjusting pressure ports, mechanics can evaluate the A4VG / A6VM drive components, pinpointing exactly whether the displacement volume circuit or the feed-pressure valve is causing the speed degradation.
  • Isolates Differential Failures: Navigate complex limited-slip differential repairs safely. The guide provides step-by-step disassembly charts for the epicyclic reduction gears, preventing catastrophic ring gear destruction by enforcing the exact methods for measuring backlash and selecting the correct shims during reassembly.

Important Pre-Purchase Advisories

  • Engine Maintenance Notice: While this Technical Handbook provides comprehensive service data (fluids, RPM settings, and external oil pressures) for the Deutz F4M 2011 diesel engine, it explicitly directs technicians to "contact the service of the company DEUTZ" for internal engine block overhauls.
  • Integrated Third-Party Manuals: The highly specialized Carraro Axle Repair Manuals (covering the differential, hubs, and TB150 / TB138.5 transmission boxes) are fully embedded within this single PDF. No secondary driveline literature is required.

Table of Contents

  • GENERAL
    • FOREWORD
    • FUNDAMENTAL SAFETY INSTRUCTIONS
    • Organizational measures
  • SERVICE DATA
    • Service Data general
    • Service Data 21D
      • Preface
    • Service Data 121D
      • Preface
    • Service Data 221D
    • Service Data 321D
  • DIESEL ENGINE
  • TRAVEL DRIVE
  • AXLES
    • FRONT AXLE
      • GENERAL INFORMATION
        • Manual use
        • Information property
        • Agreements and definitions
        • General description
        • Recommendations for repair operations
      • SAFETY INSTRUCTIONS
        • General safety recommendations
        • Safety symbols
        • General precautions
      • DISASSEMBLY AND ASSEMBLY OPERATIONS
        • Brake disk group
        • Epicyclic reduction gear group
        • Wheel hub group
        • Brake group - Wheel shaft CA147188
        • Wheel shaft group CA150144
        • Differential support group
        • Differential group
        • Pinion group
        • Testing after assembly
    • REAR AXLE
      • GENERAL INFORMATION
        • Manual use
        • Information property
        • Agreements and definitions
        • General description
        • Recommendations for repair operations
      • DISASSEMBLY AND ASSEMBLY OPERATIONS
        • Hydraulic motor group (TB150)
        • Hydraulic motor group (TB138.5)
        • Transmission box group (TB150)
        • Transmission box group (TB138.5)
        • Epicyclic reduction gear group
        • Wheel hub group
        • Wheel shaft group
        • Differential support group
        • Differential group (Limited slip)
        • Differential group (Open)
        • Pinion group
        • Testing after assembly
  • STEERING SYSTEM
    • Hydraulic System, Safety Instructions
    • Depressurizing the hydraulic system
    • Steering - Hydraulic circuit diagram for standard version
    • Hydraulic circuit diagram, key
    • Steering - Hydraulic circuit diagram for high-speed version
    • Hydraulic steering system
    • Functional description of the steering system for standard version wheel-loaders
    • Steering 21D, 121D and 221D (without emergency steering)
    • Steering 321D (without emergency steering)
    • Steering 121D and 221D (with emergency steering)
    • Steering 321D (with emergency steering)
  • BRAKES
    • Explanations of circuit diagrams and illustrations
    • Brake system - Hydraulic circuit diagram for standard version
    • Functional description of brake system
  • WORKING HYDRAULIC
    • Hydraulic circuit diagram - Working hydraulics without options
    • Hydraulic circuit diagram - Working hydraulics with options
    • Control block - Working hydraulics
    • Lifting cylinder for 21D, 121D and 221D
    • Hydraulic circuit diagram - Cooling
    • Functional description of the hydraulic cooling system
  • ELECTRICAL SYSTEM
    • Electrical components in circuit diagram
  • FRAME
    • Repair of the frame
    • Articulated joint, replacement of parts
  • FITTINGS, PIPES AND HOSES
  • SEALING, PROTECTIVE, TESTING AND CLEANING AGENTS