48
Pub. No. 1290 - January 2010
RITE-HITE
®
Dual-Dok
®
Combined Lift & Leveler System Owner’s Manual
GENERAL TROUBLESHOOTING CONTINUED
Problem
Probable Cause Solution
9.
Platform will not raise
a. Selector valve pulled.
a. Check selector valve position located on
in Leveler Mode.
front scissor cross member. Should be
pushed in for normal operation.
b. No power to system.
b. See General Power Problems.
c. Dock height sensor improperly
c. Check dock height sensor assembly and
adjusted.
readjust. Reference Dock Height Sensor
Adjustment section.
d. Electrical system.
d. - Check all limit switch inputs using the
function keys of the message center.
Compare limit switch states to State Chart.
- Check or replace (A0200 and A0201)
valve coil and wiring terminated at junction
box.
- Remove and/or replace (E0208) limit
switch until platform has been returned to
dock height. May be held closed.
e. Hydraulic system.
e. - Check and/or repalce (A0200 and A0201),
3 way-2 position spool valve and/or
(A0202), normally closed pilot operated
poppet valve. May be stuck.
- Increase the pressure on the Leveler
System Relief Valve (LRV). (1/4 turn
clockwise).
- See General Hydraulic Problems.
10.Lip will not extend in
a. Improper maintenance.
a. Do all required maintenance, See
in Auto-lip or Leveler Mode.
Maintenance Procedures section.
b. No power to system.
b. See General Power Problems.
c. Debris on lip hinge spools.
c. Check lip hinge spools for debris and
remove.
d. Electrical system.
d. - Check all limit switch inputs using the
function keys of the message center.
Compare limit switch states to State Chart.
- Check or replace (A0201 and A0203)
valve coil and wiring terminated at junction
box.
e. Hydraulic system.
e. - Check and/or repalce (A0201), 3 way-2
position spool valve and/or (A0203),
normally closed pilot operated poppet
valve. May be stuck.
- Increase the pressure on the Lip
Sequence Valve (SV1). (1/4 turn clockwise)
- See General Hydraulic Problems.
