39
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.
WARNING!
To avoid serious injury or death, GUARDS, INTERLOCKS, and
SAFETY DEVICES must be restored to correct operation when
installing parts or making repairs.
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.
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.)
• If foam is visible in tank oil, check for a loose
connection in suction line between pump and
tank. Tighten connections.
TROUBLESHOOTING ANALYSIS
