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78 - 4
Section E
Hydraulics
9803/6400
Section E
78 - 4
Issue 1
Hydraulic Rams
Trouble Shooting
(continued)
Item Symptoms
Related Parts
Trouble
Treatment
Poor
Bending is more than the
•
Replace with new part.
operation
Piston rod
specified limit.
The seal and sliding part material may be
cylinder tube
(Bending distortion:
damaged too, so inspect. If abnormal,
Refer to maintenance standards)
replace.
4-1
There is a recess
•
Replace with new part.
Movement
Cylinder tube
As above, inspect the seal and sliding
not smooth
part material.
Abnormal wear, damage of sliding
•
Replace with new part.
Piston rod
area
As above, inspect the seal and sliding
cylinder rod
part material.
sliding part
Foreign matter intruding on piston
•
Remove foreign material.
and cylinder head sliding area
As above, inspect the seal and sliding
part material.
4
Scratches, wear are present
•
Replace with new part.
Piston seal
Inspect the cylinder tube inner surface
also.
Scratches, rust on inside
•
Remove the scratches, rust by honing or
with an oil stone and make the surface
smooth.
Cylinder tube
If the scratch is deep and cannot be
repaired, replace cylinder tube.
•
Replace piston seal.
Piston Nut
Loose nut
•
Tighten to specified torque.
Valves
Leak from valve
•
Inspect the valve leakage amount and
service.
Note:
Hydraulic oil expands and contracts due to changes in temperature and pressure. Accordingly, the ram also
expands and this can be mistaken for internal leakage. When inspecting for internal leakage, do so at set conditions.
4-2
Inner oil
leakage.
Piston rod
extends when
work stops or
lowers
abnormally
during work.
Also, specified
operating
speed is not
achieved.
Summary of Contents for JS 200 Series
Page 57: ...9 1 Section 3 Routine Maintenance 9803 6400 Section 3 9 1 Issue 2 Component Location Diagram...
Page 113: ......
Page 137: ...5 3 Section C Electrics 9803 6400 Section C 5 3 Issue 2 Pump Control FLOW CHART...
Page 201: ...10 7 Section C Electrics 9803 6400 Section C 10 7 Issue 1 CAPs II Diagnostic system K C...
Page 215: ...Section E Section E Hydraulics 9803 6400 Issue 2 3 2 3 2 Schematics...
Page 217: ...Section E Section E 9803 6400 Issue 2 3 3 3 3 Hydraulics Schematics...
Page 218: ...3 5 Section E Hydraulics 9803 6400 Section E 3 5 Issue 1 Schematics Shuttle Block JS200 JS240...
Page 232: ...10 1 Section E Hydraulics 9803 6400 Section E 10 1 Issue 1 Hydraulic Pump JS200 JS240...
Page 233: ...10 2 Section E Hydraulics 9803 6400 Section E 10 2 Issue 1 Hydraulic Pump JS200 JS240...
Page 234: ...10 3 Section E Hydraulics 9803 6400 Section E 10 3 Issue 1 Hydraulic Pump JS200 JS240...
Page 263: ...30 2 Section E Hydraulics 9803 6400 Section E 30 2 Issue 1 Control Valve JS200 JS240...
Page 264: ...30 3 Section E Hydraulics 9803 6400 Section E 30 3 Issue 1 Control Valve JS200 JS240...
Page 265: ...30 4 Section E Hydraulics 9803 6400 Section E 30 4 Issue 1 Control Valve JS200 JS240...
Page 266: ...30 5 Section E Hydraulics 9803 6400 Section E 30 5 Issue 1 Control Valve JS200 JS240...
Page 267: ...30 6 Section E Hydraulics 9803 6400 Section E 30 6 Issue 1 Control Valve JS200 JS240...
Page 268: ...30 7 Section E Hydraulics 9803 6400 Section E 30 7 Issue 1 Control Valve JS200 JS240...
Page 327: ...51 12 Section E Hydraulics 9803 6400 Section E 51 12 Issue 1 Solenoid Valve 8 spool...
Page 328: ...55 1 Schematic Section E Hydraulics 9803 6400 Section E 55 1 Issue 1 Shuttle Valve...
Page 330: ...55 3 Schematic Section E Hydraulics 9803 6400 Section E 55 3 Issue 1 Cushion Valves...
Page 481: ...7 15 Section F Transmission 9803 6400 Section F 7 15 Issue 2 Motor...
Page 482: ...7 16 Section F Transmission 9803 6400 Section F 7 16 Issue 1 Motor...