78 - 1
Section E
Hydraulics
9803/6400
Section E
78 - 1
Issue 1
Hydraulic Rams
Trouble Shooting
Hydraulic ram trouble and its remedies.
It is not easy to find the part causing the trouble. In the chart below, possible problems are listed. Repair is difficult so refer to
the estimated cause and treatment listed in the chart. In the chart, the general phenomenon, estimated causes and treatment
are shown. However, machine trouble is most often caused, not by just one faulty part, but its relationship with other parts. Not
all of the possible causes and treatments are listed in the chart below, therefore, it may be necessary for the person responsible
for repairs to make further investigations to find the cause of the trouble.
Item
Symptoms
1
Oil leakage from piston rod sliding part
2
Oil leakage from cylinder head meeting part
3
Oil leakage from pipe and cylinder tube welded part
4
Faulty operation
Item Symptoms
Related Parts
Trouble
Treatment
On the sliding surface, there are
1.
Use an oil stone and remove the scratch
scratches and rust that can be
and make the sliding surface smooth.
felt by the fingernail.
(Less than 1.5 S). If oil leakage
continues even though the rod surface is
made smooth, the scratch may cause
damage to the U-ring and other seals, so
disassemble and inspect.
Piston rod
2.
If the scratches and rust cover such a
wide area that they cannot be repaired
by an oil stone, replace the piston rod
and U-ring, wiper ring and seals and the
piston rod bearing member.
Piston rod
The plating is peeling.
Re-plate or replace the piston rod.
1
sliding part
Also inspect the seal and piston rod
oil leakage
bearing member and replace if damaged.
Foreign matter is biting into the
Remove foreign matter.
inner and outer surfaces of
If there is damage to packing, replace it.
the packing.
There is a scratch on the inner
Replace.
and outer surface of the packing.
Rod packing
The lip and groove parts are
Possibly due to burning caused by
(Buffer ring,
locally carbonized (burned).
adiabatic compression from air remaining
U-ring)
inside the ram. After replacing the
packing, first operating the ram at
low-pressure, low speed to sufficiently
bleed the air.
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...