RITE-HITE DUAL-DOK 2200, Руководство пользователя

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46
Pub. No. 1290 - January 2010
RITE-HITE ® Dual-Dok ® Combined Lift & Leveler System Owner’s Manual
GENERAL TROUBLESHOOTING CONTINUED
Problem Probable Cause Solution
4. Rear hinge pins do not a. Rear hinge pins are blocked. a. Check for debris blocking hole in either
operate or do not fully pivot block.
engage or disengage. b. Dock height sensor improperly b. Check dock height sensor assembly and
adjusted. readjust. Reference Dock Height Sensor
Adjustment section.
c. Rear hinge pin blocks not c. Remove and reinstall pivot blocks.
properly aligned. (RHC P/N 5200)
d. Rear hinge pin cylinder d. - Check rear hinge pin thrust tube locking
assembly is bent, broken or hex bolt. Replace if needed.
out of alignment. - Repair or replace limit switch actuator
assembly as needed.
- Replace hinge pin cylinder.
e. Scissor drop arm interference. e. Check if scissor drop arms are bent or
sliding drop arm pin is damaged.
f. Electrical system. f. - Check limit switch actuator arm
adjustment on rear pin cylinder.
- Check solenoid (A0205) and verify that it
is energized while the pins are disengaged
and the motor is running.
- Motor overload is tripped. Reset overload
or replace if necessary. (Measure amp
draw on one power lead and compare to
Full Load Amp rating (FLA) on motor
specification tag.)
g. Hydraulic system. g. Check or replace (A0205), 4 way-2 position
spool valve. May be stuck.
See General Hydraulic Problems.
5. Platform frequently sags a. Hydraulic system. a. Check or replace (A0200), 3 way-2 position
below dock height but spool valve and/or (A0202) normally closed
automatically returns pilot operated poppet valve. May be stuck
platform to dock height. open.
Check is selector valve is leaking.
See General Hydraulic Problems.
6. Platform frequently sags a. Selector valve pulled. a. Check selector valve position located on
below dock height but front scissor cross member. Should be
does not recycle. 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 or replace (A0200 and A0202) valve
coils and wiring terminated at junction box.
Check or replace dock height sensor limit
switch, inputs (E0202 and E0205).