Case 680 Loader Backhoe - Complete Guide for Maintenance and Repair
Case 680 Service Manual: A Comprehensive Guide for Owners and Operators
If you own or operate a Case 680 backhoe loader, you know how versatile and powerful this machine is. Whether you use it for digging, loading, trenching, or landscaping, the Case 680 can handle any job with ease.
Case 680 Service Manual
But like any other machine, the Case 680 also needs proper care and attention. Without regular maintenance and repair, your machine can lose its performance and reliability. That's why you need a service manual for your Case 680.
A service manual is a detailed document that provides all the information you need to operate, maintain, and repair your machine. It covers everything from the features and specifications of your machine to the troubleshooting and parts ordering procedures.
In this article, we will give you a comprehensive overview of what you can find in your Case 680 service manual. We will also show you how to use it effectively and efficiently. By following this guide, you will be able to keep your machine in top condition and save time and money on repairs.
Features and Specifications of the Case 680
The first section of your service manual covers the features and specifications of your Case 680. This section gives you a general overview of what your machine can do and how it works. It also helps you understand the basic components and systems of your machine.
Here are some of the topics covered in this section:
Engine
The engine is the heart of your machine. It provides the power and torque needed to drive the wheels and operate the hydraulic system. The Case 680 uses a diesel engine that has four cylinders and a displacement of 188 cubic inches. It produces a maximum power of 63 horsepower at 2000 rpm and a maximum torque of 185 lb-ft at 1400 rpm. The engine has a direct injection system that delivers fuel directly into the combustion chamber. This improves the fuel efficiency and reduces the emissions of your machine.
The service manual provides information on how to check and adjust the engine components, such as the valves, injectors, glow plugs, and belts. It also gives you the specifications for the engine oil, fuel, and coolant.
Transmission
The transmission is the system that transfers the power from the engine to the wheels. It allows you to change the speed and direction of your machine. The Case 680 has a four-speed transmission that has two ranges: low and high. The low range is used for heavy-duty work and the high range is used for traveling. The transmission also has a torque converter that acts as a clutch and increases the torque output of the engine. The transmission is controlled by a lever that has four positions: neutral, forward, reverse, and park.
The service manual provides information on how to check and adjust the transmission components, such as the clutch, gears, shafts, and bearings. It also gives you the specifications for the transmission oil and filter.
Hydraulic System
The hydraulic system is the system that operates the backhoe and loader attachments of your machine. It uses pressurized fluid to move the cylinders and valves that control the movement of the boom, dipper, bucket, and stabilizers. The hydraulic system consists of a pump, a reservoir, a filter, a relief valve, and various hoses and fittings. The pump draws the fluid from the reservoir and delivers it to the cylinders and valves. The relief valve regulates the pressure of the fluid and prevents it from exceeding a certain limit. The filter cleans the fluid and removes any dirt or debris that could damage the system.
The service manual provides information on how to check and adjust the hydraulic system components, such as the pump, valves, cylinders, and hoses. It also gives you the specifications for the hydraulic fluid and filter.
Brakes
The brakes are the system that stops or slows down your machine. They are essential for your safety and control. The Case 680 has two types of brakes: service brakes and parking brakes. The service brakes are used to stop or slow down your machine during normal operation. They are operated by a pedal that applies pressure to the brake discs on each wheel. The parking brakes are used to hold your machine in place when it is parked or not in use. They are operated by a lever that engages a brake band on each wheel.
The service manual provides information on how to check and adjust the brake components, such as the discs, pads, bands, and cables. It also gives you the specifications for the brake fluid.
Steering
The steering is the system that changes the direction of your machine. It allows you to maneuver your machine in tight spaces and around obstacles. The Case 680 has two types of steering: power steering and steering clutch. The power steering is used to steer your machine when it is moving forward or backward. It is operated by a steering wheel that turns a hydraulic cylinder that moves the front wheels. The steering clutch is used to steer your machine when it is turning sharply or spinning in place. It is operated by two levers that engage or disengage a clutch on each rear wheel.
The service manual provides information on how to check and adjust the steering components, such as the cylinder, valve, pump, clutch, and linkage. It also gives you the specifications for the power steering fluid.
Electrical System
The electrical system is the system that provides power and signals to various components of your machine. It consists of a battery, an alternator, a starter, lights, switches, gauges, and wires. The battery stores electrical energy and supplies it to the starter when you turn on the ignition key. The alternator generates electrical energy from the engine rotation and charges the battery while your machine is running. The starter initiates the engine combustion by spinning the flywheel. The lights illuminate your machine and its surroundings for visibility and safety. The switches control various functions of your machine, such as starting, stopping, lights, horn, etc. The gauges monitor various parameters of your machine, such as speed, temperature, pressure, fuel level, etc.
The service manual provides information on how to check and replace the electrical components, such as the battery, alternator, starter, lights, switches, gauges and wires. It also gives you wiring diagrams that show how each component is connected.
Instruments and Controls
The instruments and controls are the devices that allow you to operate your machine effectively and comfortably. They include gauges, switches, pedals, and seats. The gauges display important information about your machine's status and performance. The switches activate or deactivate various functions of your machine. The levers control the movement and speed of your machine and its attachments. The pedals control the brakes and the clutch of your machine. The seats provide comfort and support for you and your passengers.
The service manual provides information on how to check and adjust the instruments and controls, such as the gauges, switches, levers, pedals, and seats. It also gives you the specifications for the instrument panel bulbs.
How to Operate the Case 680 Safely and Efficiently
The second section of your service manual covers how to operate your Case 680 safely and efficiently. This section gives you practical tips and instructions on how to use your machine for various tasks and terrains. It also helps you prevent accidents and injuries by following safety precautions and warnings.
Here are some of the topics covered in this section:
Pre-Operation Checks
Before you start your machine, you should perform a pre-operation check to make sure everything is in good condition and working order. This will help you avoid potential problems and malfunctions that could affect your safety and performance. The pre-operation check consists of inspecting the following items:
Fuel level: Make sure there is enough fuel in the tank and there are no leaks or damage to the fuel system.
Oil level: Check the engine oil dipstick and make sure there is enough oil in the crankcase and there are no leaks or damage to the oil system.
Coolant level: Check the coolant level in the radiator and make sure there is enough coolant in the system and there are no leaks or damage to the cooling system.
Hydraulic fluid level: Check the hydraulic fluid level in the reservoir and make sure there is enough fluid in the system and there are no leaks or damage to the hydraulic system.
Transmission oil level: Check the transmission oil level in the dipstick and make sure there is enough oil in the system and there are no leaks or damage to the transmission system.
Brake fluid level: Check the brake fluid level in the master cylinder and make sure there is enough fluid in the system and there are no leaks or damage to the brake system.
Power steering fluid level: Check the power steering fluid level in the reservoir and make sure there is enough fluid in the system and there are no leaks or damage to the power steering system.
Air filter: Check the air filter element and make sure it is clean and free of dust or debris that could restrict the airflow to the engine.
Fuel filter: Check the fuel filter element and make sure it is clean and free of dirt or water that could contaminate the fuel supply to the engine.
Oil filter: Check the oil filter element and make sure it is clean and free of sludge or metal particles that could damage the engine components.
Hydraulic filter: Check the hydraulic filter element and make sure it is clean and free of dirt or water that could damage the hydraulic components.
Tires: Check the tires and make sure they have enough air pressure and tread wear and there are no cuts or punctures that could cause a flat tire.
Lights: Check the lights and make sure they are working properly and there are no broken or missing bulbs or lenses that could impair your visibility or safety.
Battery: Check the battery and make sure it is fully charged and securely mounted and there are no loose or corroded connections or cables that could cause a short circuit or a fire.
Wires: Check the wires and make sure they are properly routed and secured and there are no frayed or exposed wires that could cause a short circuit or a fire.
Hoses: Check the hoses and make sure they are properly connected and clamped and there are no cracked or leaking hoses that could cause a loss of fluid pressure or a fire.
Belts: Check the belts and make sure they are properly tensioned and aligned and there are no worn or damaged belts that could cause a loss of power transmission or a breakdown.
Attachments: Check the attachments and make sure they are properly attached and secured and there are no loose or missing pins or bolts that could cause the attachments to fall off or malfunction.
Controls: Check the controls and make sure they are properly adjusted and lubricated and there are no stuck or broken controls that could cause the machine to operate erratically or dangerously.
If you find any problems or defects during the pre-operation check, you should fix them or report them to your supervisor before you start your machine.
Starting and Stopping Procedures
After you complete the pre-operation check, you can start your machine and get ready for work. To start your machine, you should follow these steps:
Make sure the parking brake is engaged and the transmission lever is in neutral.
Turn on the ignition key and wait for the glow plugs to heat up. The glow plug indicator will light up on the instrument panel.
When the glow plug indicator goes off, turn the key to the start position and release it when the engine starts. Do not crank the engine for more than 10 seconds at a time. If the engine does not start, wait for 30 seconds before trying again.
Let the engine idle for a few minutes to warm up. Do not rev up the engine or operate the attachments until the engine reaches its normal operating temperature.
Check the gauges and make sure they show normal readings. If you notice any abnormal readings, such as low oil pressure, high coolant temperature, or low battery voltage, stop the engine and investigate the cause.
To stop your machine, you should follow these steps:
Move your machine to a level and safe location and lower the attachments to the ground.
Disengage the clutch and shift the transmission lever to neutral.
Release the steering clutch levers and apply the parking brake.
Let the engine idle for a few minutes to cool down. Do not turn off the engine immediately after working hard or running at high speed.
Turn off the ignition key and remove it from the switch.
Turn off all the lights and switches.
Lock the cab door and take your keys with you.
Operating Tips
Once you start your machine, you can use it for various tasks and terrains. To operate your machine safely and efficiently, you should follow these tips:
Always wear your seat belt and keep your arms and legs inside the cab. Do not lean out of the window or open the door while your machine is moving.
Always check your surroundings and make sure there are no people, animals, or obstacles in your path. Use your horn, lights, and mirrors to signal your intentions and warn others of your presence.
Always follow the rules and regulations of your work site. Obey the speed limits, traffic signs, and signals. Do not enter restricted or hazardous areas without permission or proper protection.
Always use the appropriate gear and range for your speed and load. Do not shift gears while your machine is moving or under load. Do not overload or over-speed your machine beyond its capacity or rating.
Always use the clutch smoothly and gradually. Do not release or engage the clutch abruptly or harshly. This could damage the transmission or cause your machine to jerk or stall.
Always use the power steering gently and smoothly. Do not turn the steering wheel sharply or rapidly. This could damage the power steering system or cause your machine to skid or tip over.
Always use the steering clutch carefully and sparingly. Do not engage or disengage the steering clutch while your machine is moving at high speed or under load. This could damage the steering clutch system or cause your machine to spin out of control.
Always use the brakes moderately and evenly. Do not apply or release the brakes suddenly or harshly. This could damage the brake system or cause your machine to skid or tip over.
Always use the attachments correctly and safely. Do not operate the attachments without proper training or supervision. Do not use the attachments for purposes other than intended. Do not exceed the lifting capacity or reach limit of the attachments. Do not swing the attachments rapidly or violently. This could damage the attachments or cause them to drop or hit something.
Troubleshooting
Sometimes, you may encounter problems or malfunctions while operating your machine. These could affect your safety and performance. or malfunctions, you should follow these steps:
Identify the problem: Try to find out what is wrong with your machine by observing the symptoms, such as unusual noises, smells, vibrations, leaks, smoke, etc. Check the gauges and warning lights on the instrument panel and see if they indicate any abnormal readings or alerts.
Locate the cause: Try to find out where the problem is coming from by checking the components and systems that are related to the symptoms. Use the service manual to find the troubleshooting charts and diagrams that help you diagnose the problem.
Fix or report the problem: Try to fix the problem by following the service manual instructions and using the proper tools and equipment. If you cannot fix the problem or if it requires special skills or parts, report it to your supervisor or service provider and seek professional help.
Do not ignore or neglect any problems or malfunctions that you encounter. They could worsen over time and cause more damage or danger to your machine and yourself.
How to Maintain the Case 680 Properly and Regularly
The third section of your service manual covers how to maintain your Case 680 properly and regularly. This section gives you detailed instructions and schedules on how to perform routine maintenance on your machine. It also helps you extend the life and reliability of your machine by preventing wear and tear and detecting problems early.
Here are some of the topics covered in this section:
Maintenance Schedule
The maintenance schedule is a table that shows you when and how to perform routine maintenance on your machine. It is based on the hours of operation or the calendar intervals, whichever comes first. The maintenance schedule consists of three types of maintenance: daily, periodic, and special.
Daily maintenance is the maintenance that you should perform every day before you start your machine. It includes checking and filling the fluid levels, inspecting and cleaning the filters, checking and adjusting the tires, checking and tightening the fasteners, lubricating the fittings, etc.
Periodic maintenance is the maintenance that you should perform at regular intervals according to the hours of operation or the calendar intervals. It includes changing and draining the fluids, replacing and cleaning the filters, adjusting and replacing the belts, inspecting and repairing the hoses, testing and replacing the battery, etc.
Special maintenance is the maintenance that you should perform at special occasions or under special conditions. It includes cleaning and flushing the cooling system, overhauling and rebuilding the engine, transmission, hydraulic system, etc.
The service manual provides the maintenance schedule table that shows you the type, frequency, and procedure of each maintenance item. You should follow the maintenance schedule strictly and record the date, hour, and result of each maintenance item.
Lubrication
Lubrication is one of the most important aspects of maintenance. It reduces friction and wear between moving parts and prevents corrosion and rust. Lubrication involves using oil and grease for different parts of your machine. Oil is a liquid lubricant that flows through pipes and channels to reach various components. Grease is a semi-solid lubricant that is applied manually to specific fittings.
The service manual provides information on how to lubricate your machine properly and regularly. It gives you the specifications for the type and amount of oil and grease to use for each part. It also gives you a lubrication chart that shows you where each lubrication point is located on your machine. You should lubricate your machine according to the lubrication chart and schedule.
Filters
Filters are devices that remove impurities from fluids or air that enter or circulate in your machine. Filters protect your machine from contamination and damage by trapping dirt, dust, water, metal particles, etc. Filters involve using filter elements for different fluids or air in your machine. Filter elements are usually made of paper, metal, or synth