11-01
680 High Clearance Sprayer - Maintenance, Service &
Troubleshooting
Section E
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
Hydraulic System noisy Hydraulic fluid too viscous If very cold, let unit idle
(Continued) or too cold stand at idle until it warms
up.
Inlet line to auxiliary Clean and/or replace hoses
hydraulic pump is clogged as necessary
or restricted.
Hose or tubing resting Make sure hose or tubing
against unit. clamps are tight
Loss of hydraulic fluid Leakage at drive shaft Repair or replace
due to leakage
Leakage at plugs and Repair or replace
gaskets
Fittings and tubes Tighten lose fittings and
leaking replace worn hoses of
cracked tubing
Leakage at high pressure Repair or replace
relief valve on tractor
Leakage between flange Repair or replace
and housing
Hydraulic Liquid Pump Pump not primed Check vent line and clean
if necessary to top of tank
Low discharge
Air leaks in suction line Check and reseal inlet
fittings
Blocked/clogged line Clean out and replace
strainer
Impeller plugged or loose Inspect and clear
obstruction or tighten
Bypass adjustment set Adjust bypass screw on
improperly side of hydraulic motor
to manufacturer’s
specifications
7
Section E
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