TROUBLESHOOTING 999 SERVICE/MAINTENANCE MANUAL
10-56
Published 05-16-17, Control # 233-03
Test 24 – Actuating the Solenoid Valve Manual Overrides
To check that a solenoid valve or system valve is operating
correctly:
• Start the engine and actuate the manual override.
• Hydraulic brake valves have an override push button in
center of black nut.
• If the valve is operating correctly, the valve shifts to
perform the control function.
Item Description
1 Hydraulic Brake Valve
2 Valve Override (under cap)
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