1. OUTLINE
1-4
1.1.3 DISASSEMBLING AND ASSEMBLING HYDRAULIC EQUIPMENT
(1) Removing Hydraulic Equipment
1. Before disconnecting pipes, release the hydraulic pressure of the system, or open the return side cover and
take out the filter.
2. Carefully drain oil from the removed pipes into containers without spilling on the floor.
3. Apply plugs or caps on the pipe and fitting ends to avoid oil spillage and dust intrusion.
4. Clean off the external surface of the equipment before disassembling, and drain hydraulic and gear oil before
placing it on the workbench.
(2) Disassembling Hydraulic Equipment
1. Do not disassemble, reassemble or modify the hydraulic equipment without the permission of the manufacturer.
The manufacturer is not responsible for the performance and function of the machine components after
modification.
2. When disassembling and reassembling for unavoidable reason, refer the work to qualified personnel who have
the specific knowledge or completed the parts service training.
3. Provide matching marks to facilitate reassembling work.
4. Before starting the work, read the manual for the disassembling procedure, if it is provided, and decide whether
the work can be performed by yourself.
5. Always use the special jigs and tools if they are specified.
6. If it is hard to remove a part according to the procedure, do not try it by force, investigate the cause.
7. Place the removed parts in order and attach tags for easier reassembling.
8. Note the location and quantity of parts when disassembling.
(3) Inspecting Parts
1. Ensure the disassembled parts are free from seizure, interference and uneven contact.
2. Measure and record the wear condition of parts and clearance.
3. If the problem is found in a part, repair or replace it with a new one.
(4) Reassembling Hydraulic Equipment
1. Turn ON the ventilation fan or open windows to maintain good ventilation begore cleaning parts.
2. Perform rough and finish cleaning before assembling.
3. Remove washing oil by with pressurized air and apply clean hydraulic or gear oil for assembling.
4. Always replace the removed O-rings, backup rings and oil seals with new ones by applying grease in advance.
5. Remove dirt and moisture from and perform degreasing on the surfaces where liquid gaskets are applied.
6. Remove rust preventive agent from the new parts before use.
7. Fit bearings, bushings, and oil seals using special jigs.
8. Assemble the parts utilizing matching marks.
9. Ensure all the parts are completely assembled after the work.
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