Daewoo Solar 300LC-V, Manual

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S0709401K
Page 43
Main Control Valve (Kayaba)
DISASSEMBLY
GENERAL INSTRUCTIONS FOR DISASSEMBLY
1. Stop engine when pressure of actuator is not indicated.
It is dangerous to disassemble control valve while it is under pressure. High pressure oil can squirt
out or components can spring out. When partially disassembling control valve that is on machine, be
careful to follow the following caution.
2. Vent pressurized air from hydraulic oil tank.
3. Clean all exterior surfaces of valve before to disassembly and protect it from dirt and foreign
materials.
4. Match mark the disassembled parts to ensure proper reassembling position.
5. Replace all sealing parts such as O-rings and backup rings with a new ones.
6. Do not replace spools, they are matched with valve housing and sleeve.
NOTE: The further part numbers of an assembly part are shown as (assembly part number -
further part number).
Disassembly of Main Spool Part
1. Remove socket head bolt (74, two places per each section, width across flats: 8 mm) and cap (8, ten
places).
2. Remove plug assembly (72, width across flats: 8 mm) and plug (91, width across flats: 22 mm)
according to necessity.
3. Remove O-ring (7, one place per each section) from valve housing (1 and 13).
4. Remove all spool subassemblies from valve housing
5. Remove socket head bolt (74, two places per each section, width across flats: 8 mm) and cap (12, ten
places).
6. Remove O-ring (7, one place per each section) from valve housing (1, 13).
CAUTION!
When disassembling assembly, when pressure is not fully released, or bucket is not
lowered to ground, is very dangerous. A poppet in an antidrift valve may spring out and
drop the bucket at the same time. Always lower bucket to ground and fully release pressure
before disassembling.
IMPORTANT
When removing spool, be careful not to damage it.
Attach label to each spool in order to install it in the correct position when reassembling.