Direct Lift Pro9F - Manual (Page 21)

Pro9F 9000 lbs. Floor Plate Lift IN50019 Rev. C 03/30/2009 21
TROUBLESHOOTING
The common problems that may be encountered and their probable causes are covered
in the following paragraphs:
•
Motor Does Not Operate
Failure of the motor to operate is normally caused by one of the following:
1. Breaker or fuse blown. Repair or replace.
2. Faulty wiring connections; call electrician.
3. Defective up button; call electrician for service.
• Motor Functions but Lift Will Not Rise
If the motor is functioning, but the lift will not rise, do the following in the order given:
1. A piece of trash might be under check valve. Push handle down and push the up button at
the same time. Hold for 10-15 seconds. This should flush the system.
2. Check the clearance between the plunger valve of the lowering handle. There should be
1/16” clearance.
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 AW, 46 or other good grade non-detergent hydraulic oil at a
high hydraulic pressure. Be familiar with its toxicological 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 hydraulic 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.