horsch Maestro CX, Translation Of The Original Operating Instructions

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7 | Pneumatic system
74 60013444 • 01 • 01/2021 • en
7.6.2 Troubleshooting
Fault Possible cause Remedy
Bearing damage on fan • Normal wear
• Fan did run with ex-
cessive power
• Unbalance in impeller
wheel
• Replace bearing
• Never run the fan
without connected
pneumatic hoses
• Replace the impeller
wheel or clean from
contamination
Radial seal in motor leak-
ing • Return pressure too
high
• Check return flow
pressure
Hydraulic oil overheated • Fan did run with ex-
cessive power
• Oil filter contaminated
• Protective fan grid
soiled
• Oil cooler dirty
• PTO-shaft speed too
high
• Reduce power and
check oil level
• Check pressure on fan
• Change oil and oil filter
• Clean protective fan
grid
• Clean radiator fins
• Avoid unnecessary
cooling power, reduce
the drive speed
Hydraulic motor defective • Fan did run with ex-
cessive power
• Hydraulic oil contamin-
ated
• Reduce the load and
check pressure on fan
• Change hydraulic oil
and filter
PTO-shaft pump bearing
worn out • Pump distorted and
not sufficiently
fastened on the tractor
• Replace the bearings,
mount the pump
tightly but without dis-
tortion
No draught on coulters
Air hoses clogged
• Intake air grid blocked
with dirt
• Clean the intake air
grid