Autoquip CMD DOCK LIFT - Manual (Page 30)

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PROBLEM POSSIBLE CAUSE AND SOLUTION
Lift won’t lower. • The solenoid coil may be incorrectly wired,
burned out, not rated for the voltage, or the line
voltage may be excessively low. Check voltage
near the coil.
• The velocity fuse may be locked. Do not
attempt to remove the velocity fuse. The
following steps should be followed:
1. Remove the load from the lift. Inspect all
fittings, hoses, and other hydraulic components
for leads or damage.
2. If no leak or damage is noticed, attempt to
pressurize the lifting cylinder by depressing the
“UP” button on the controller for a few seconds.
Immediately up releasing the “UP” button,
depress the “DOWN” button. If the lift starts to
lower, continue pressing the “DOWN” button
until the lift is in the fully lowered position.
3. If the lift does not lower after trying Step 2,
wait approximately 10 – 15 minutes for the
pressure in the hydraulic system to equalize.
Then, depress the “DOWN” button until the lift is
in the fully lowered position.
4. Once the lift is in the fully lowered position,
bleed the air from the hydraulic system by
depressing the “DOWN” button. Hold the
“DOWN” button for approximately 60 seconds.
Repeat this process 8 – 10 times. This step
may need to be repeated several times to fully
remove the air in the system by raising the lift to
50% of its travel then lowering. Bleed air from
the bleeder screw on top of the cylinder.
• Should the above steps not correct the problem,
contact Autoquip to obtain instruction for further
action.
TROUBLESHOOTING ANALYSIS