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Plumbing
PROBLEM
Boom valves fail to open
Boom valves fail to close
No water at boom
Hydraulic & Pneumatic
PROBLEM
No hydraulic pressure.
The air bags are not inflating
Machine sits unevenly
Prairie 1500-3000L Operator's Manual MY17-MY19 - REV 0
COMMON CAUSES
Insufficient power.
System pressure greater than
150 PSI.
Insufficient power.
Foreign objects blocking plunger
from seating.
No Tier valve entered or is at 0
COMMON CAUSES
Low hydraulic oil level
Fill pump is engaged
Low system pressure
Compressor not working
properly
Incorrectly adjusted ride height
valves.
COMMON SOLUTION
Check all wiring and connections to ensure
there is 12 volts at the valves.
Reduce the system pressure
Check all wiring and connections to ensure
there is 12 volts at the valves.
Clean the inside of the boom valves.
Enter value greater than 0
COMMON SOLUTION
Check the oil level in the hydraulic
reservoir and top up if necessary
Switch the hydraulic fill pump off
The bags will not inflate until the pressure
in the system is above 75 PSI, check system
pressure.
Check that the compressor is working
correctly
Adjust the ride height valves as per
the instructions in the Lubrication and
Maintenance chapter.
Chapter 11 - Troubleshooting - 71
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