J&M 500ST - Manual (Page 31)

31
Troubleshooting
Problems Solutions
Excessive wear to belt edge - Tracking is off.
a. Adjust belt tension and tracking (See section 2.8).
Excessive wear to belt edge - Rubber skirting is
worn or out of place.
a. Replace rubber skirting.
b. Adjust rubber skirting.
Boom arm will not move up or down - Engine
R.P.M. slow.
a. Increase engine R.P.M.
Boom arm will not move up or down - Hydrau-
lic pump is not producing sufficient pressure or
volume to hydraulic cylinder.
a. Check for pinched or leaking hydraulic lines.
b. Allow hydraulic oil to warm up.
c. Increase engine R.P.M.
d. Hydraulic fluid level low.
e. Hydraulic filter clogged.
f. Check for proper oil viscosity.
g. Check to see if hydraulic pump is worn out
h. Make sure battery is fully charged.
i. Turn valve bank pressure bypass a 1/4 turn clockwise.
j. Check wiring to valve body and hydraulic pump
Hydraulic unit squeals
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.
Hydraulic unit has poor performance at high
R.P.M.
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