Term
| In what five ways can Hydraulic system maintence work be classified? |
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Definition
1. Service
2. Inspection
3. Repair
4. Reconditioning (overhaul)
5. Testing |
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Term
| What are some specific task involved with Hydraulic system maintenance Service. |
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Definition
1. Checking the fluid levels.
2. Changing the fluid
3. Changing or cleaning filters
4. Cleanup |
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Term
| Regarding regular inspections, what should you do if you have little experience with a hydraulic system? |
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Definition
| You should inspect more frequently. As experience is gained, you may inspect less often. |
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Term
| What is the purpose if hydraulic system inspection? |
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Definition
| To discover trouble before it happens. |
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Term
| What are the two basic yardsticks used to define the elapsed time between inspections? |
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Definition
1. Operating Hours
2. Calendar Time |
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Term
| When organizing a Maintenance Plan for hydraulic system what should be the first step? |
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Definition
| Identify each systgem individually. The most common method used is to number the reservoirs and describe their machines. |
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Term
| You should have a maintenance file for every unit of hydraulic equipment in the plant. What essential items should be included in that file? |
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Definition
1. A circuit diagram and bill if materials for each component in the system.
2. A description of the system and its relationship to the operation of the machine. This should include a description of the machine's normal cycle and the hydraulic actions that the system performs.
3. A special folder for the hydraulic fluid and it's service record. This should include all pertinent information - fluid type, date changed, and so on.
4, An inspection plan for the system.
5. A routine servicing plan for the system.
6. A record of major maintenance performed on the system. |
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Term
| The need to provide planned system maintenance can be proved in either of two ways. What are they? |
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Definition
1. Inspection. - Inspection is a form of preventive maintenance.
2. Failure. - Failure is the harder, but more conspicuous way. When something breaks, it is immediately obvious that maintenance is required. |
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Term
| What are some checkpoints to consider during inspections? |
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Definition
1. Reservoir fluid level
2. Reservoir fluid temperature
3. Visible leaks
4. External condition of system structures (supports tight, components securely fastened, no vibration)
5. Operating pressure and temperature.
6. Fluid apperance and quality (contamination levels)
7. Filter condition
8. Machine cycle performance (smooth and steady, no skips or unusual noises) |
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Term
| System and component repairs made to put equipment back in operation are basically of two kinds. What are they? |
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Definition
1. Repairing a system element
2. Replacing a system element |
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Term
| What is the reconditioning of systems or their elements referred to as? |
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Definition
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Term
| When is reconditioning usually accomplished? |
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Definition
| When an element has been replaced and the old element is reconditioned. |
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Term
| You have three choices when you are considering reconditioning a component? |
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Definition
1. Do it yourself
2. Send it out to a local shop
3. Send it back to the manufacturer |
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Term
| When you recondition an element yourself, what guidelines should you follow. |
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Definition
1. Completely disassemble the component.
2. Wash and clean all usable parts.
3. Inspect all parts that can be salvaged.
4. Determine whether or not certain parts should be salvaged.
5. Obtain new parts where required.
6. Lubricate and reassemble all parts.
7. Adjust the unit and give it a performance check.
8. If you do not return it to service immediately, package the component for protection in storage. |
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Term
| How often should hydraulic fluids be checked and serviced? |
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Definition
1. Once a week for fluid level.
2. Once every 6 months or 1000 hours for content (lab analysis)
3. Change every 2 years or 4000 hours. |
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Term
| How often should filters be opened and cleaned or cartridgess replaced? |
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Definition
| At least once every 6 months or 500 to 1000 hours. |
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Term
| System cleanup should be as follows: |
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Definition
1. External - continuously
2. air breathers - every month
fluid and reservoir interior - every year or 2000 hours
pipes and system - flush before very fluid replacement or change. |
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