CE T Operational Performance Manual (EN)

SECTION 7 MAINTENANCE STANDARD Group 1 Operational Performance Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1 Group 2 Major Components - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-21 Group 3 Track and Work Equipment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-32

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SECTION 7 MAINTENANCE STANDARD GROUP 1 OPERATIONAL PERFORMANCE TEST 1. PURPOSE Performance tests are used to check: 1) OPERATIONAL PERFORMANCE OF A NEW MACHINE Whenever a new machine is delivered in parts and reassembled at a customer's site, it must be tested to confirm that the operational performance of the machine meets Hyundai spec. Working condition 2) OPERATIONAL PERFORMANCE OF A WORKING MACHINE With the passage of time, the machine's operational performance deteriorates, so that the machine needs to be serviced periodically to restore it to its original performance level.

Before servicing the machine, conduct performance tests to check the extent of deterioration, and to decide what kind of service needs to be done(by referring to the "Service Limits" in this manual). Maintenance record Operating 21077MS01 3) OPERATIONAL PERFORMANCE OF A REPAIRED MACHINE After the machine is repaired or serviced, it must be tested to confirm that its operational performance was restored by the repair and/or service work done. 7-1

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2. TERMINOLOGY 1) STANDARD Specifications applied to the brand-new machine, components and parts. 21077MS02 2) SERVICE LIMIT The lowest acceptable performance level. When the performance level of the machine falls below this level, the machine must be removed from work and repaired. Necessary parts and components must be replaced. 21077MS03 7-2

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3. OPERATION FOR PERFORMANCE TESTS 1) Observe the following rules in order to carry out performance tests accurately and safely. (1) The machine Repair any defects and damage found, such as oil or water leaks, loose bolts, cracks and so on, before starting to test. (2) Test area ① ② Select a hard, flat surface. Secure enough space to allow the machine to run straight more than 20 m , and to make a full swing with the front attachment extended. If required, rope off the test area and provide signboards to keep unauthorized personnel away. ③ (3) Precautions ① Before starting to test, agree upon the signals to be employed for communication among coworkers.

Once the test is started, be sure to communicate with each other using these signals, and to follow them without fail. Operate the machine carefully and always give first priority to safety. While testing, always take care to avoid accidents due to landslides or contact with high voltage power lines. Always confirm that there is sufficient space for full swings. Avoid polluting the machine and the ground with leaking oil. Use oil pans to catch escaping oil. Pay special attention to this when removing hydraulic pipings. 45077MS10 ② ③ ④ (4) Make precise measurements ① Accurately calibrate test instruments in advance to obtain correct data.

Carry out tests under the exact test conditions prescribed for each test item. Repeat the same test and confirm that the test data obtained can be procured repeatedly. Use mean values of measurements if necessary. ② ③ 7-3

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