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Bengal Brute Common Section 6 - 65
JOYSTICK TROUBLESHOOTING
Boom operation not responding to joystick movement.
Isolate hydraulic vs. electronic symptom.
Turn off electronic master switch (preventing electronic actuator on valve from
attempting to hold spool in neutral position). With tractor engine running, operate the
valve section with the manual handle. If function operates normally, continue with
electronic inspection. If function does not operate normally, continue with hydraulic
inspection.
Electronic inspection.
Connect a voltmeter to the cable connector of the valve section that is not operating.
This will allow you to measure supply and signal voltage when the joystick is
operated.
Main, Secondary, and Swivel Valves – signal voltage should be 50% of supply voltage
with joystick in Neutral position, up to 75% of supply voltage in B direction, down to
25% of supply voltage in A direction. Signal voltage should change smoothly with
lever movement.
Pin #1 – Supply Voltage Pin #2 – Signal Voltage Pin #gnd – ground
Deck Roll Valve or Float Valve – signal voltage should be 50% of supply voltage with
joystick in Neutral position, up to 65% of supply voltage in B direction, down to 35% of
supply voltage in A direction. Signal voltage should change smoothly with lever
movement. Signal voltage should be approximately 75% of supply voltage when float
switch is operated.
Pin #1 – Supply Voltage Pin #2 – Signal Voltage Pin #gnd – ground
Shield Valve or On/Off Valve – Voltage on pin #1 should be equal to supply voltage
when switch is operated in A direction. Voltage on pin #2 should be equal to supply
voltage when switch is operated in B direction.
Pin #1 – Signal Voltage Pin #2 – Signal Voltage Pin #gnd – ground
If none of the valve will operate with electrical signal, verify that there is oil pressure at
the valve inlet. Electrical Valves must have pilot supply oil to move the spools.
Possible electronic problems.
Open circuit (broken wire, bad connection or loose connection in switch box).
Shorted to positive, ground, or other.
Incorrect voltage signal from joystick.
Continued on next sheet
TROUBLESHOOTING