Autoquip CMD DOCK LIFT - Manual (Page 28)

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DANGER !
To avoid personal injury, NEVER go under the lift platform until the load is
removed and the scissors mechanism is securely blocked in the open position.
See "Lift Blocking Instructions" section.
Lift lowers very slowly. • The down-solenoid is not operating properly due
to dirt or damage.
• Check for pinched tubing or hose. Where pipe
is used, check for obstruction in the line.
• The oil is extremely viscous due to low ambient
temperatures. Add or replace with lower weight
oil that stays thinner in cold conditions (5W-15,
etc.)
PROBLEM POSSIBLE CAUSE AND SOLUTION
Lift raises, then lowers back
slowly. • The "Down" solenoid may not be seating.
Remove the solenoid coil and check again. If
the lift does not hold with the solenoid coil
removed, the down valve cartridge should be
removed and cleaned or replaced as necessary.
• The oil line, hose, or fitting may be leaking.
Check and repair if necessary.
• The “check valve” in the pump assembly may
not be seating. This is indicated by the pump
shaft and motor turning backward on their own
with no power applied. Generally, this condition
can be heard. Replace the pump assembly.
TROUBLESHOOTING ANALYSIS