Vestil S-xxx-FF - Manual (Page 21)

21
Problem: Possible cause(s): Action:
Unit will not raise; motor does not
run
Loose wire
Bad solenoid
Upper limit switch out of adjustment
Blown fuse
Batteries discharged
Verify 24 volts at coil when
raise is pushed, if no
voltage; trace wiring
back to till her head
looking for voltage on
each side of the
connectors until the bad
connection is found.
If voltage is present at the solenoid
and the unit does not rise, remove
the two wires to the coil and
measure the coil resistance. It
should be around 19 ohms. If it’s
open, or shorted replace the
solenoid.
Bypass upper limit switch and see if
the unit raises…DO NOT TAKE IT ALL
THE WAY UP… If it does rise,
verify the limit switch is normally
closed and will open when
activated. If the limit switch is ok,
try to adjust the switch accordingly
so that the units raise height is
approximately 7 to 8”
Check fuses above motor controller
Re-charge batteries
Unit will not raise; motor runs Lower solenoid stuck on
No hydraulic oil Check to see if the lowering switch is
stuck on. If it is, remove the tiller
head via 3 screws on bottom and
replace switch, or tap on switch to
see if it can be freed up.
Re-fill hydraulic oil
Unit will not lower
Loose wire; bad coil
Upper limit switch out of adjustment
Verify 24 volts at coil when lower is
pushed, if no voltage, trace wiring
back to tiller head looking for
voltage on each side of the
connectors until the bad
connection is found.
If voltage is present at the coil and
the unit does not lower, remove the
connector to the coil and measure
the coil resistance. It should be
around 39 ohms. If it’s open, or
shorted replace the coil.
Loosen hydraulic line at pump to
relieve pressure build up.
Re-adjust limit switch so unit stops
at 7 to 8 inches above the ground.
Look for binding in chain or rollers
Unit keeps blowing fuses when the
raise button is pressed
Shorted solenoid for motor raise Remove the wire to the solenoid coil
on the pump motor. Measure the
resistance; it should be around 19
ohms. If it is nearly zero ohms
replace the solenoid.