22 - 1
Section E
Hydraulics
9803/6400
Section E
22 - 1
Issue 2*
Regulator JS200. JS240
Regulator Trouble Shooting
Engine Overloads
Put a load on each pump to determine if the front or rear pump is malfunctioning. If both pumps are abnormal, check 1 and 2.
If only one pump is abnormal, begin with 3.
1. Check to see if the power shift command current value I is normal or not.
Check fluctuation of solenoid current.
2. Power shift pressure is low
Renew the proportional pressure reducing valve.
3. Disassemble and clean the compensatory piston, compensatory rod.
4. Disassemble and clean the pin (898).
Maximum Flow Rate Is Not Achieved
1. Confirm that the pilot pressure Pi is normal or not.
2. Disassemble and clean the pilot piston.
3. Disassemble and clean the piston (648).
4. Disassemble and clean the spool.
Note: If any of the parts shows wear or scratches, replace it.
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