Hyundai HX145LCR Manual page 500

3. DISASSEMBLY AND ASSEMBLY
1) GENERAL PRECAUTIONS
(1)
All hydraulic components are manufactured to a high precision. Consequently, before
disassembling and assembling them, it is essential to select an especially clean place.
(2)
In handling a control valve, pay full attention to prevent dust, sand, etc. from entering into it.
(3)
When a control valve is to be remove from the machine, apply caps and masking seals to all
ports. Before disassembling the valve, recheck that these caps and masking seals are fitted
completely, and then clean the outside of the assembly. Use a proper bench for working.
Spread paper or a rubber mat on the bench, and disassemble the valve on it.
(4)
Support the body section carefully when carrying or transferring the control valve. Do not lift by
the exposed spool, end cover section etc.
(5)
After disassembling and assembling of the component it is desired to carry out various tests (for
the relief characteristics, leakage, flow resistance, etc.), but hydraulic test equipment is necessary
for these tests. Therefore, even when its disassembling can be carried out technically, do not
disassemble such components that cannot be tested, adjusted, and so on. Additionally one
should always prepare clean cleaning oil, hydraulic oil, grease, etc. beforehand.
2)
TOOLS
Before disassembling the control valve, prepare the following tools beforehand.
Name of tool
Vice mounted on bench (soft jaws) 1 unit
Hexagon wrench
Socket wrench
Spanner
Quantity
Each 1 piece 5, 6, 10, 12 and 14
Each 1 piece 27 and 32
32 (main relief valve, overload relief valve,
Each 1 piece
26 (holding valve)
8-37
Size (mm)
negative relief valve)