For any test to a system, the hydraulic oil must be at the normal operating temperature. To increase the oil temperature, start the engine. Drive the machine for a short distance. Cycle the boom, the rotator, the bogies, and the stick several times.
Before any tests are performed, visually inspect the complete system for oil leaks and for damaged parts. Also, visually inspect the wiring connectors and wiring harnesses for damage, corrosion, and contact.
Before you perform any test, check for alarms on the IQAN-DG unit when the IQAN system is activated. Start the engine and observe the IQAN system for any alarms. If an alarm occurs, determine the root cause and fix the problem. As you operate the machine to warm up the hydraulic oil, observe the IQAN-DG unit, for alarms. If an alarm occurs, the IQAN system will detect the failure. If an alarm occurs, note the alarm and then fix the alarm.
Refer to the following warnings and notice for all inspections and tests of the machine.
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Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine. To prevent possible injury, perform the procedure that follows before testing and adjusting the power train. |
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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
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Escaping fluid under pressure, even a pinhole size leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury. Always use a board or cardboard when checking for a leak. |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
- Permit only one operator on the machine. Keep other personnel away from the machine and the attachment (work tool).
- Park the machine on a smooth, level surface. Move away from other operating machines and away from personnel.
- Lower the machine to the lowest position. Retract the extendable stick. Lower the boom and stick with the attachment to the ground. Tilt the harvester head into the HORIZONTAL position. Lower the harvester head to the ground. Place the boom switch in the OFF position.
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| Illustration 1 | g00864740 |
TROUBLESHOOTING Position | |
- Place the operating mode switch in the NEUTRAL position.
- Install the steering frame lock. Place blocks in front of the wheels and behind the wheels.
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| Illustration 2 | g00485495 |
Steering Frame Lock (LOCKED Position) | |
- Install the swing lock pins.
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| Illustration 3 | g00485499 |
Location for Installing the Swing Lock Pins | |
- Stop the engine by turning the engine start switch key to the OFF position.
- Turn the engine start switch key to the ON position. Place the boom switch in the ON position. Move the implement joystick in every direction. Move the pendulum arm joystick in every direction. Moving the joysticks will release the pressure in the hydraulic system.
- Place the boom switch in the OFF position. Turn the engine start switch key to the OFF position. Turn the secondary disconnect switch and the battery disconnect switch to the OFF position.
- In order to relieve all of the pressure in the hydraulic tank, press and hold down the plunger on the breaker relief valve.
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| Illustration 4 | g00486433 |
Breaker Relief Valve | |
- Make sure that all oil pressure is released before you begin any work on the system.
Troubleshooting can be complex. A list of some of the possible problems and corrections are on the following pages.
This list of possible problems and possible corrections will only provide an indication of the location of a problem and the repairs that are required. Remember that a problem is not necessarily caused by one part, but by the relation of one part with other parts. This list can not provide all possible problems and corrections. Service personnel must find the problem and the source of the problem. Then, complete the necessary repairs.
Perform a visual inspection first. If the visual checks are completed but the problem has not been identified, perform operational checks and use the IQAN system to check the inputs and outputs. If the problem is not understood, perform instrument tests. This procedure will help to identify problems.