Remote Control Valve 6. Maintenance Procedures (1) Required tools and tightening torque Code
Part name
Screw size
Hexagon wrench
6
125
Hexagon socket head bolt
M8
22
312
Adjusting nut
M14
32
302
Disk
M14
24
301
Joint
Wrench Special jig (See Item 9.)
20.6±1.5 68.6±4.9
M14
Other
47.1±2.9
IN
• Vapor corrosion inhibitor • White kerosene • Heat-resistant grease
Tightening torque (N•m)
AL
Dimension (mm)
TE RN
Tool
CO US N F E ID O E F N TS TI M AL GL : F O OR BA T L H
E
• Sandpaper (#1000, #2000) • Whetstone • Vise
(2) Maintenance standards Maintenance inspection item
Leak amount
Spool
Standard
Remarks
When handle is in neutral1000 cc/min or more Conditions During operation2000 cc/min or more Primary pressure 2.94 MPa If either condition occurs, replace the remote conOil viscosity 23 mm2/s trol valve as one unit. When wear on the sliding sections exceeds wear on the non-sliding sections by 10 μm or more, replace the remote control valve as one unit.
The same approximate conditions as those listed above for leak amount are expected when the condition on the left occurs.
If the end section is worn by 1 mm or more, perform replacement.
Push rod
Operation section backlash
Replace the operation section disk (302) and joint section (301) if there is backlash of 2 mm or more due to wear.
Make adjustments if the backlash is due to looseness in the tightening sections.
If abnormal noise, hunting, or a drop in primary pressure occurs during operation and the probOperation stabillem cannot be resolved with "7.Causes of Trouble ity and Countermeasures", replace the remote control valve as one unit.
Note: 1) It is desirable for seal materials such as O-rings to be replaced with each disassembly, but it is acceptable to reuse them after it is confirmed that they are not damaged. Note: 2) If the hexagon socket head bolt (125) is loosened, always replace the seal washer (121).
ASM-17-25-002EN
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