J&M SpeedTender LC290 Operator's Manual page 28

Problems
Excessive wear to belt edge - Rubber skirting is
worn or out of place
Swing arm will not move up or down - Engine RPM
slow
Swing arm will not move up or down - Hydraulic
pump is not producing sufficient pressure or
volume to hydraulic cylinder
Hydraulic unit squeals
Hydraulic unit has poor performance at high RPM
28
Troubleshooting
Solutions
a. Replace rubber skirting.
b. Adjust rubber skirting.
a. Increase engine RPM.
a. Check for pinched or leaking hydraulic lines.
b. Allow hydraulic oil to warm up.
c. Increase engine RPM.
d. Hydraulic fluid level low.
e. Hydraulic filter clogged.
f. Check for proper oil viscosity.
g. Check if hydraulic pump is worn out.
h. Ensure battery is fully charged.
i. Check wiring to valve body and hydraulic pump.
a. Check sight glass on hydraulic unit reservoir and fill if necessary.
b. Run engine at reduced speed for 5-10 minutes to warm up oil.
c. Clean/replace filler cap/breather.
d. Clear obstruction in suction hose.
e. Replace plugged/dirty oil filter element.
a. Clean pressure relief in control valve or replace.
b. Check sight glass on hydraulic unit reservoir and fill if necessary.
c. Replace plugged/dirty oil filter element.
d. Charge battery.