Direct Lift PP8 Plus Long - Manual (Page 17)

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3. Remove the check valve cover and clean ball and seat.
WARNING!!
Failure to properly relieve pressure in the following step can cause injury to personnel. This lift uses ISO Grade
32 or other good grade non-detergent hydraulic oil at a high hydraulic pressure. Be familiar with its toxicologi-
cal properties, precautionary measures to take, and first aid measures as stated in the Safety Summary before
performing any maintenance with the hydraulic system.
4. Oil level too low. Oil level should be just under the vent cap port when the lift is down. Relieve all hydrau-
lic pressure and add oil as required.
• Oil Blows out Breather of Power Unit
If oil blows out of the breather of the power unit, take the following actions:
1. Oil reservoir overfilled. Relieve all pressure and siphon out hydraulic fluid until at a proper level
2. Lift lowered too quickly while under a heavy load. Lower the lift slowly under heavy loads.
• 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.