Troubleshooting - Uline H-3934 Manual De Instrucciones

CHANGING THE AW32 HYDRAULIC OIL
CONTINUED
7. Fill the reservoir with the new hydraulic fluid and run
the motor by pressing the UP button to prime the
pump and extend the hydraulic cylinder. Jog the UP
button to slowly extend the cylinder until the hole in
the cylinder rod lines up with the holes in the cylinder
mounting clevis. Replace the upper cylinder pin and
corresponding snap ring.
PROBLEM
Forks will not raise
(pump running)
Platform will not remain
elevated
Platform will not lower
Platform lowers too slowly
Cylinder(s) leaking
Pump leaking
Spongy platform
PAGE 7 OF 21
MAINTENANCE CONTINUED

TROUBLESHOOTING

CAUSES
No hydraulic fluid in reservoir.
Load too heavy (relief valve operating).
Lowering valve held open.
Lower valve held open.
Pump check valve not seated.
Platform or scissors obstruction.
Lowering valve not opening.
Obstruction in flow limiting valve.
Lowering valve not opening completely.
Obstruction in flow limiting valve(s).
Cylinder seals worn or damaged.
Valves, fitting or hoses loose.
Reservoir overfilled with oil.
Hose or fitting loose.
Air in hydraulic circuit.
8. Raise the lift to its maximum height and disengage
the maintenance bars. Completely raise and lower
the lift 3 times to remove any trapped air from the
hydraulic system.
9. Completely raise the lift and engage the
maintenance bars. Recheck the fluid level
as detailed in the "Monthly Inspection and
Maintenance" section. (See Page 6) The lift is
now ready for use.
RECOMMENDATIONS
Fill reservoir.
Reduce load.
Check lower control for malfunction.
Clean and/or replace lowering solenoid.
Check lower control for malfunction.
Clean and/or replace lowering solenoid.
Clean/repair/replace valve.
Flush outlet check.
Remove obstruction or reposition lift.
Clean and/or replace lowering solenoid.
Flush flow limiting valves.
Clean and/or replace lowering solenoid.
Flush flow limiting valve(s).
Repack cylinder(s).
Tighten valves, fittings or hoses.
Drain excess fluid.
Tighten fittings or hoses.
Raise and lower platform several times
to remove air and check fluid level.
1-800-295-5510
uline.com
0421 IH-3934