![background image](http://html1.mh-extra.com/html/jcb/js-200-series/js-200-series_service-manual_3627661287.webp)
32 - 1
Section E
Hydraulics
9803/6400
Section E
32 - 1
Issue 1
Control Valve JS200/JS240
Control Valve Trouble Shooting
Control Valve in General
Symptoms
Possible Causes
Countermeasures
Spool sticking
1. Oil temperature is abnormally high.
Remove the obstruction.
2. Hydraulic oil is dirty
Replace the hydraulic oil and clean the
circuit at the same time.
3. Port connector is tightened
Check the torque.
too much
4. Valve housing is deformed due to
Loosen the installation bolt and check.
Installation
5. Pressure is too high
Attach pressure gauge to pump port and
ram port and check the pressure.
6. Spool is bent
Replace the valve assembly.
7. Return spring is damaged
Replace the damaged parts.
8. Spring or cap is not on straight
Loosen the cap and after aligning, tighten.
9. Temperature inside valve is not even.
Warm up the circuit.
Spool does not stroke
1. Valve is clogged inside with dirt
Remove the dirt (flushing).
Load cannot be maintained
1. Oil leakage from the ram
Check the ram.
2. Oil is by-passing from the valve spool
Replace the valve assembly.
3. Oil leakage from the port relief valve
Remove the port relief from the housing
and clean the housing seat and relief
valve seat.
4. Oil leakage from the lock valve
Disassemble the lock valve and clean the
poppet seat and sleeve, plug seat.
If the seat is damaged, replace the
poppet, or lap the poppet and seat.
When the spool is selected from
1. Foreign matter in load check valve
Disassemble the check valve and clean.
neutral to raise position, the load
falls.
2. Check valve poppet or seat
Replace the poppet or lap the poppet and
damaged
seat part.
Содержание JS 200 Series
Страница 57: ...9 1 Section 3 Routine Maintenance 9803 6400 Section 3 9 1 Issue 2 Component Location Diagram...
Страница 67: ...2 1 Section B Body Framework 9803 6400 Section B 2 1 Issue 2 Undercarriage Dimensions JS200 JS220...
Страница 68: ...2 2 Section B Body Framework 9803 6400 Section B 2 2 Issue 2 Undercarriage Dimensions JS200LC JS220LC...
Страница 69: ...2 3 Section B Body Framework 9803 6400 Section B 2 3 Issue 2 Undercarriage Dimensions JS240 JS260...
Страница 70: ...2 4 Section B Body Framework 9803 6400 Section B 2 4 Issue 2 Undercarriage Dimensions JS240LC JS260LC...
Страница 113: ......
Страница 137: ...5 3 Section C Electrics 9803 6400 Section C 5 3 Issue 2 Pump Control FLOW CHART...
Страница 140: ...5 6 Section C Electrics 9803 6400 Section C 5 6 Issue 1 Pump Control Cushioned Boom Starting continued Flow Chart...
Страница 143: ...5 9 Section C Electrics 9803 6400 Section C 5 9 Issue 1 Pump Control Pressure Increasing System continued Flow Chart...
Страница 150: ...5 16 Section C Electrics 9803 6400 Section C 5 16 Issue 1 Pump Control Power Supply Cut Delay Flow Chart...
Страница 154: ...5 20 Section C Electrics 9803 6400 Section C 5 20 Issue 1 Pump Control Swing brake Swing lock continued Flow Chart...
Страница 155: ...5 21 Section C Electrics 9803 6400 Section C 5 21 Issue 1 Pump Control Lever Lock Circuit Diagram Time Chart...
Страница 157: ...5 22 Section C Electrics 9803 6400 Section C 5 22 Issue 1 Pump Control Lever Lock continued Flow Chart...
Страница 201: ...10 7 Section C Electrics 9803 6400 Section C 10 7 Issue 1 CAPs II Diagnostic system K C...
Страница 215: ...Section E Section E Hydraulics 9803 6400 Issue 2 3 2 3 2 Schematics...
Страница 217: ...Section E Section E 9803 6400 Issue 2 3 3 3 3 Hydraulics Schematics...
Страница 218: ...3 5 Section E Hydraulics 9803 6400 Section E 3 5 Issue 1 Schematics Shuttle Block JS200 JS240...
Страница 232: ...10 1 Section E Hydraulics 9803 6400 Section E 10 1 Issue 1 Hydraulic Pump JS200 JS240...
Страница 233: ...10 2 Section E Hydraulics 9803 6400 Section E 10 2 Issue 1 Hydraulic Pump JS200 JS240...
Страница 234: ...10 3 Section E Hydraulics 9803 6400 Section E 10 3 Issue 1 Hydraulic Pump JS200 JS240...
Страница 263: ...30 2 Section E Hydraulics 9803 6400 Section E 30 2 Issue 1 Control Valve JS200 JS240...
Страница 264: ...30 3 Section E Hydraulics 9803 6400 Section E 30 3 Issue 1 Control Valve JS200 JS240...
Страница 265: ...30 4 Section E Hydraulics 9803 6400 Section E 30 4 Issue 1 Control Valve JS200 JS240...
Страница 266: ...30 5 Section E Hydraulics 9803 6400 Section E 30 5 Issue 1 Control Valve JS200 JS240...
Страница 267: ...30 6 Section E Hydraulics 9803 6400 Section E 30 6 Issue 1 Control Valve JS200 JS240...
Страница 268: ...30 7 Section E Hydraulics 9803 6400 Section E 30 7 Issue 1 Control Valve JS200 JS240...
Страница 276: ...31 8 Section E Hydraulics 9803 6400 Section E 31 8 Issue 1 Control Valve JS200 JS240 Operation continued...
Страница 277: ...31 9 Section E Hydraulics 9803 6400 Section E 31 9 Issue 1 Control Valve JS200 JS240 Operation continued...
Страница 278: ...31 10 Section E Hydraulics 9803 6400 Section E 31 10 Issue 1 Control Valve JS200 JS240 Operation continued Travel Fig 4...
Страница 279: ...31 11 Section E Hydraulics 9803 6400 Section E 31 11 Issue 1 Control Valve JS200 JS240 Operation continued...
Страница 280: ...31 12 Section E Hydraulics 9803 6400 Section E 31 12 Issue 1 Control Valve JS200 JS240 Operation continued...
Страница 281: ...31 13 Section E Hydraulics 9803 6400 Section E 31 13 Issue 1 Control Valve JS200 JS240 Operation continued...
Страница 282: ...31 14 Section E Hydraulics 9803 6400 Section E 31 14 Issue 1 Control Valve JS200 JS240 Operation continued...
Страница 283: ...31 15 Section E Hydraulics 9803 6400 Section E 31 15 Issue 1 Control Valve JS200 JS240 Operation continued...
Страница 286: ...31 18 Section E Hydraulics 9803 6400 Section E 31 18 Issue 1 Control Valve JS200 JS240 Operation continued...
Страница 314: ...50 2 Section E Hydraulics 9803 6400 Section E 50 2 Issue 1 Solenoid Valve 8 spool JS200 JS240 Schmatics Technical Data...
Страница 327: ...51 12 Section E Hydraulics 9803 6400 Section E 51 12 Issue 1 Solenoid Valve 8 spool...
Страница 328: ...55 1 Schematic Section E Hydraulics 9803 6400 Section E 55 1 Issue 1 Shuttle Valve...
Страница 330: ...55 3 Schematic Section E Hydraulics 9803 6400 Section E 55 3 Issue 1 Cushion Valves...
Страница 363: ...75 10 Section E Hydraulics 9803 6400 Section E 75 10 Issue 1 Hydraulic Rams Ram Piston Head Nut JS00980...
Страница 442: ...2 2 Schematics specifications Section F Transmission 9803 6400 Section F 2 2 Issue 1 Motor Gearbox...
Страница 452: ...3 10 Section F Transmission 9803 6400 Section F 3 10 Issue 1 Motor Gearbox Fig 8 1 1st Speed Fixed Mode...
Страница 481: ...7 15 Section F Transmission 9803 6400 Section F 7 15 Issue 2 Motor...
Страница 482: ...7 16 Section F Transmission 9803 6400 Section F 7 16 Issue 1 Motor...
Страница 530: ...Contents Page No Routine Maintenance See Section 3 Technical Data 1 1 i Engine 9803 6400 i Issue 1 Section K Section K...