46 EC3200 Owner’s Manual - PN 44024
Problem: Winch “Up”, and Main Cylinder
“Down”, are the only functions that don’t
operate.
Solutions:
• Make sure the anti 2-block cradle
bracket is activating the limit switch
pr
operly at the boom tip. Check to
make sure the cradle bracket is aligned
properly.
• Make sure that the limit switch is working
properly. Disconnect the two wires
connected to the limit switch and tie
them together. If all functions operate,
replace the limit switch.
• Make sure that the cord for the cord reel
is undamaged. Check the continuity of
the cord. Disconnect the cord reel from
the crane harness and bypass the
harness connection. If the crane
operates properly, replace cord reel.
Problem: Crane operates slowly.
Solutions:
• Make sure that the crane is receiving the
recommended GPMs to operate.
• Check the level of hydraulic fluid in the
reservoir. Add fluid as needed.
• Check to see if the valve bank orifice is
plugged. If so, replace the orifice. Call
Stellar Customer Service for instructions.
• Make sure the solenoid valves are
receiving power to the coils from the
receiver. If there is not power going to
the coils, check for loose power and
ground connections. inside the
transmitter or replace the handle trigger
assembly. If the proportional valve is
receiving 12 volts, loosen the solenoid
holding nut and check to see if the
solenoid coil is magnetizing. If no polarity
is present, replace the coil. If coil is
magnetizing, remove the stem valve,
thoroughly clean, lubricate, and reinstall
the valve.
Problem: Cylinder drifts outward or
downward.
Solutions:
• Check to see if there is air in the
hydraulic system. Operate all cylinders
connected to the hydraulic system. Start
with the extension cylinder
, then operate
the main boom, winch, rotation, and
ending with the hydraulic outriggers, if
installed. When operating, extend each
cylinder halfway out, retract all the way
in, and then extend until the cylinder rod
is at the end of its stroke. Operate
cylinders slowly so air is pushed thru the
system to the reservoir. Repeat this cycle
2-3 times.
• Make sure the holding valves are
operating properly. Remove, clean, and
then inspect each holding valve. When
removing a holding valve, always relieve
the pressure inside the cylinder by
loosening jam nut of the holding valve
and turning set screw inward/clockwise.
Count the number of turns until the set
screw is seated. When reinstalling the
holding valve, make sure the valve is
reset by turning the set screw the number
of turns it took to relieve the pressure.
Finish by tightening the jam nut.
• Check the cylinder rod for scratches. If a
scratch is located on the cylinder rod,
hydraulic fluid can pass thru and cause a
loss of pressure. Replace cylinder rod or
cylinder.
• Check to see if the piston seals are
damaged. If they show signs of
damage, install a new cylinder seal kit.
To Next Page
Loading...
