Direct Lift PP8S - Manual (Page 19)

19
• Motor Hums and Will Not Run
If the motor hums but fails to run, take the following actions:
1. Lift overloaded. Remove excessive weight from lift.
WARNING!
The voltages used in the lift can cause death or injury to personnel. In the following steps, make sure that a
qualified electrician is used to perform maintenance
2. Faulty wiring..….... Call electrician
3. Bad capacitor..….. Call electrician
4. Low voltage........... Call electrician
• Lift Jerks Going Up and Down
1. If the lift jerks while going up and down, it is usually a sign of air in the hydraulic system. Raise lift all the
way to top and return to floor. Repeat 4-6 times. Do not let this overheat power unit.
• Oil Leaks
Oil leak causes at the power unit and cylinders are normally caused by the following:
1. Power unit: if the power unit leaks hydraulic oil around the tank-mounting flange check the oil level in
the tank. The level should be two inches below the flange of the tank. A screwdriver can be used as a
“dipstick”.
2. Cylinder - Piston Rod: the rod seal of the cylinder is out. Rebuild or replace the cylinder.
3. Cylinder - Vent: the piston seal of the cylinder is out. Rebuild or replace the cylinder.
• Lift makes excessive noise / vibrates
Excessive noise from the lift is normally caused by the following:
1. Cross beam ends are rubbing the columns. Readjustment needed.
2. Cylinder too tight, load lift half capacity and cycle up and down a few times to break in. Lift cylinder
should quiet down with use. If not contact your Direct Lift Distributor to purchase an Oil Additive.
3. May have excessive wear on cable sheaves or shafts. Replace them.