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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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