Table 4-4 General Troubleshooting
TROUBLE
PROBABLE CAUSE
REMEDY
1. Hydraulic Pump Noisy
Cavitation
Check condition of suction strainer and return
line filter. Clean or replace as necessary.
Check for clogged or restricted inlet line to
pump.
Check for loose fittings on suction line.
Clean hydraulic tank breather cap.
Areation
Check all connections on inlet side of pump.
Pour hydraulic fluid over suspected leak. If
noise stops, the leak has been found.
Fill hydraulic tank to bottom of filler strainer.
Check condition of pump shaft seal.
Pump worn or damaged
Overhaul or replace.
2. Hydraulic fluid
Pressure too high
Contact authorized Bush Hog dealer.
overheated
Fluid dirty or fluid level low
Clean or replace filter and strainer. Add fluid
(above 200º F [93ºC])
bring up to bottom of filler strainer.
Hydraulic fluid incorrect
Check fluid. Should a change of hydraulic
viscosity.
fluid be required, flush entire system and
change filters before adding new fluid.
Continuously stalling cutter
See Item 3
Hydraulic fluid bypassing
Overhaul or replace faulty component.
internally due to worn pump,
motor, or relieve valve.
3. Cutter stalls
Low hydraulic pressure
Contact authorized Bush Hog dealer
continuously
Cutting height too low.
Increase cutting height.
PTO speed too slow
Increase to implement PTO speed rating.
Tractor forward speed too
Use lower gear.
fast.
4. Cutter deck will not
Tractor on incline.
Move tractor to level position
pivot down.
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