Manual de servei de la retroexcavadora de tractor Case 320

1. Introducció

This service manual provides detailed information for the maintenance, repair, and troubleshooting of the Case 320 Tractor Loader Backhoe (TLB). It is intended for qualified service personnel and technicians. Adherence to the procedures outlined in this manual is crucial for ensuring the safe and efficient operation and longevity of the equipment.

The manual is organized into sections covering various aspects of the TLB, including safety, component descriptions, preventative maintenance schedules, diagnostic procedures, and technical specifications. Always refer to the latest version of this manual for the most accurate information.

2. Informació de seguretat

Safety is paramount when working with heavy machinery. Always observe the following general safety precautions to prevent injury to personnel or damage to the equipment.

• Llegeix i entén: Before performing any service or maintenance, thoroughly read and understand all instructions and warnings in this manual and on the machine itself.
• Equips de protecció individual (EPI): Always wear appropriate PPE, including safety glasses, gloves, hard hat, and steel-toed boots.
• Bloqueig /Tagfora: Ensure the machine is properly shut down, parked on level ground, and all attachments are lowered. Disconnect the battery and apply lockout/tagout procedures before working on electrical systems or moving parts.
• Pressió hidràulica: Relieve all hydraulic pressure before disconnecting hydraulic lines or components. Hydraulic fluid under pressure can cause severe injury.
• Hot Surfaces/Fluids: Be aware of hot engine components, exhaust systems, and fluids (oil, coolant) which can cause burns. Allow the machine to cool before servicing.
• Eines adequades: Use only the correct tools for the job. Ensure tools are in good condition.
• Neteja: Keep the work area clean and free of clutter. Spills can lead to slips and falls.

3. Component Overview

The Case 320 TLB is comprised of several key systems working in conjunction. Understanding the basic function and location of these components is essential for effective servicing.

Figure 3.1: Representative cover of a J.I. Case Service Manual. While this specific cover details models such as 210B, 310, 430, and 530 series, it illustrates the typical format and appearance of service documentation for Case heavy equipment. This manual provides comprehensive service information for the Case 320 Tractor Loader Backhoe.

• Sistema del motor: Powers the machine and its hydraulic systems. Includes fuel, cooling, lubrication, and exhaust sub-systems.
• Sistema hidràulic: Provides power for the loader, backhoe, steering, and other hydraulic functions. Consists of pumps, valves, cylinders, and reservoirs.
• Transmissió: Transmits power from the engine to the wheels, including the transmission, axles, and differential.
• Loader Assembly: Front-mounted attachment for digging, lifting, and carrying materials.
• Backhoe Assembly: Rear-mounted attachment for excavation and trenching.
• Sistema elèctric: Controls engine starting, lighting, instrumentation, and various electronic components.

4. Manteniment preventiu

Regular preventative maintenance is critical for the reliable operation and extended lifespan of your Case 320 TLB. Follow the recommended service intervals and procedures.

4.1 Daily Checks (Before Operation)

• Comproveu el nivell d'oli del motor.
• Inspect coolant level.
• Verify hydraulic fluid level.
• Comproveu la pressió i l'estat dels pneumàtics.
• Inspect all hoses and lines for leaks or damage.
• Test all lights, gauges, and safety devices.
• Clean windows and mirrors.

4.2 Scheduled Maintenance (Every 250 Hours / Monthly)

• Canviar l'oli del motor i el filtre.
• Inspect air filter elements.
• Lubricate all grease points on loader and backhoe linkages.
• Check battery electrolyte level and terminals.
• Inspect fan belt tension and condition.

4.3 Scheduled Maintenance (Every 500 Hours / Quarterly)

• Replace fuel filters.
• Change hydraulic filter.
• Inspect and adjust brake pedal free play.
• Check transmission fluid level and condition.

Refer to the detailed maintenance schedule within the full service manual for comprehensive instructions and additional intervals.

5. Troubleshooting & Diagnostics

This section provides a guide to common issues that may arise with the Case 320 TLB and outlines basic diagnostic steps. For complex problems, consult a qualified technician or the detailed diagnostic charts in the complete service manual.

6. Especificacions tècniques

The following are general technical specifications for the Case 320 Tractor Loader Backhoe. Specific values may vary based on configuration and year of manufacture. Always refer to the machine's data plate for precise information.

• Tipus de motor: Diesel, 4-cylinder (Specific model details in full manual)
• Pes operatiu: Aproximadament 14,000 - 16,000 lliures (6,350 - 7,250 kg)
• Loader Bucket Capacity: 0.75 - 1.0 cu yd (0.57 - 0.76 cu m)
• Backhoe Digging Depth: 14 - 16 peus (4.2 - 4.8 m)
• Capacitat del dipòsit de combustible: Approximately 30 - 40 US gallons (113 - 151 liters)
• Hydraulic System Capacity: Approximately 20 - 25 US gallons (75 - 95 liters)

7. Support & Ordering Information

For additional support, genuine replacement parts, or to order supplementary manuals, please contact the publisher or an authorized Case dealer.

This manual is published by Jensales. When ordering parts, always provide the full model number and serial number of your Case 320 TLB to ensure compatibility.

Note: This document is a general guide. For comprehensive repair procedures, detailed schematics, and specific part numbers, refer to the complete official Case 320 Service Manual.