HD-9 Series Four-Post Lifts 65 P/N 5900123 — Rev. N2 — November 2023
organization has Lockout/Tagout policies, make sure to implement them after
connecting to the power source.
Symptoms of air in the Hydraulic System include Runways moving erratically and/or making odd
noises. These could be caused by other situations; refer to Troubleshooting for more information.
To bleed the Hydraulic System:
1. Raise and lower the Runways up to six times; pause one minute between cycles.
The Lift’s motor cannot run continuously; it is designed for regular use, but not continuous use.
2. Watch the Runways as you raise and lower them.
When the Lift stops moving erratically or stops squeaking, you can stop the bleeding process.
3. Check the Hydraulic Fluid Reservoir on the Power Unit.
Bleeding the Hydraulic System may significantly lower the amount of Hydraulic Fluid in the
reservoir; add more Hydraulic Fluid if necessary.
You can damage your motor by running it without enough Hydraulic Fluid in the reservoir.
If your Lift is still moving erratically or making odd noises after bleeding the Hydraulic System, refer to
Troubleshooting for more information.
Test the Lift
BendPak strongly recommends doing an Operational Test of your Lift with a standard Vehicle on the
Runways before starting normal service (a typical Vehicle is not required, but is recommended).
During the Operational Test, watch the Lift and its components and check for proper installation and
operation. If you run into an issue that is not solved, refer to Troubleshooting.
Note: Residual air in the Hydraulic Systems can cause the Lift to shake, move erratically, or squeak
when you start using it; this is normal. This issue should diminish as the Hydraulic System is
self-bleeding. If it does not, try bleeding the Cylinder of air. If it still does not cease, refer to
Troubleshooting for additional information.
To test your Lift:
1. Before you begin using your Lift, make sure to check for people, pets, or objects that might be in
the path of the Lift as you raise and lower it.
2. Drive the Vehicle onto the Runways; while centering the Vehicle’s Tires in the middle of each
Runway.
Place the Vehicle into park, apply the parking brake, or in gear if a manual transmission, and chock
the wheels.
3. Press and hold the Up button.
4. After the Runways pass three or four Safety Locks (you will hear them), release the Up button.
5. Press and hold the pushbutton on the Pushbutton Air Valve, then press and hold the Lowering
Handle.
The Runways back down onto the Safety Locks they just passed.
⚠ CAUTION Never leave the Lift without making sure that all four Safety Locks
have engaged on locking positions at the same height. If one of the four
Safety Locks do not fully engage, the Runways will not be level and you could risk
damaging any Vehicles sitting on or underneath the Runways.
6. Press the Up button for a few seconds to disengage the Safety Locks, then release the Up button.
7. Press and hold the pushbutton on the Air Valve, then press and hold the Lowering Handle.
8. When the Runways reach the ground, release the Lowering Handle.
9. Wait for one minute.
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