Step One:
Check Oil Level in HWH Hydraulic Reservoir.Step Two:
How to check for proper Voltage.Step Three:
How to check Pump Pressure.Step Three A:
How to check Power Unit Pressure.
(Shuttle Valve Test)Step Three B:
How to check System Pressure.
(HWH Step)
NEWMAR LONDON AIRE 2019 FREIGHTLINER Floor Plan #4533 STEP DIAGNOSTICS