77
GB 16 05 01
Fault-finding
OperOper
OperOper
Oper
aa
aa
a
tional prtional pr
tional prtional pr
tional pr
obob
obob
ob
lemslems
lemslems
lems
In cases where breakdowns have occurred, the same factors always seem to be in question:
1. Minor leaks on the suction side of the pump will reduce the pump capacity or stop the suction completely.
2. A clogged suction filter will hinder or prevent suction so that the pump does not operate satisfactorily.
3. Clogged up pressure filters will result in increasing pressure at the pressure gauge but lower pressure at the
nozzles.
4. Foreign bodies stuck in the pump valves with the result that these cannot close tightly against the valve seat. This
reduces pump efficiency.
5. Poorly reassembled pumps, especially diaphragm covers, will allow the pump to suck air resulting in reduced or
no capacity.
6. Hydraulic components that are contaminated with dirt result in rapid wear to the hydraulic system.
Therefore ALWAYS check:
1. Suction, pressure and nozzle filters are clean.
2. Hoses for leaks and cracks, paying particular attention to suction hoses.
3. Gaskets and O-rings are present - and in good condition.
4. Pressure gauge is in good working order. Correct dosage depends on it.
5. Operating unit works properly. Use clean water to check.
6. Hydraulic components are maintained clean.
FAULT
Sprayer trails unstable
Rear hydraulic rams are
too tight and vehicle
continues straight ahead
when trying to turn
TRATRA
TRATRA
TRA
CKER damping syCKER damping sy
CKER damping syCKER damping sy
CKER damping sy
stemstem
stemstem
stem
PROBABLE CAUSE
Air pockets in the hydraulic
circuit
Hydraulic circuit leaking
Pressure relief valve(s) set too
low
Insufficient counter weight on
front of tractor
Pressure relief valve set too
high
CONTROL/REMEDY
Prime hydraulic circuit
Repair leak, prime
Adjust pressure relief valves
Ad ballast on front of tractor
Adjust pressure relief valves
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