16
Troubleshooting
Problem
Cause
Solution
Platform will not raise
(pump running)
No hydraulic fl uid in reservoir.
Load too heavy (relief valve operating)
Lowering valve held open
Fill reservoir
Reduce load
Check lower control for malfunction
Clean and/or replace lowering solenoid
Platform will not remain
elevated
Lower valve held open
Pump check valve not seated
Check lower control for malfunction
Clean and/or replace lowering solenoid
Clean/repair/replace valve
Flush outlet check
Platform will not lower
Platform or scissors obstruction
Lowering valve not opening
Obstruction in fl ow limiting valve
Remove obstruction or reposition lift
Clean and/or replace lowering solenoid
Flush fl ow limiting valves
Platform lowers too slowly
Lowering valve not opening completely
Obstruction in fl ow limiting valve(s)
Clean and/or replace lowering solenoid
Flush fl ow limiting valve(s)
Cylinder(s) leaking
Cylinder seals worn or damaged
Valves, fi tting or hoses loose
Repack cylinder(s)
Tighten valves, fi ttings or hoses
Pump leaking
Reservoir over-fi lled with oil
Hose or fi tting loose
Drain excess fl uid
Tighten fi ttings or hoses
Spongy platform
Air in hydraulic circuit
Raise and lower platform several times
to remove air and check fl uid level
Chart 2 Troubleshooting
REPLACEMENT PARTS
Bishamon has carefully selected the components used in the manufacture of the OPTIMUS lift tables. In the event replacement parts are required,
ALWAYS use genuine OPTIMUS components provided by Bishamon. These parts can be obtained from your Bishamon DEALER or by contacting
Bishamon Industries Corp
.
