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Southworth Products
DDL Dock Lift Manual
6.3
Relieving Hydraulic Pressure
If the machine is operating normally, hydraulic system pressure can be relieved by lowering the
platform to the fully lowered position or onto the maintenance device and continuing to hold the
down button for five to ten seconds.
If the platform is raised and will not lower:
Crush Hazard – Do not enter under the platform.
Remove load before performing any maintenance or repair.
Disconnect and lockout electrical power before performing maintenance or repair.
Failure to securely block the platform from lowering will allow the platform to fall
uncontrolled when system pressure is relieved, causing severe injury or death -
use only supplied maintenance device.
See Section 6.1 Maintenance Device on
High pressure fluid can cause severe injury or death. Always use proper personal
protective equipment when performing any maintenance or repair.
1. Thread the lifting eyes into holes on the platform for manually raising the platform (holes
off the center line of the platform).
See Section 4.6 General Installation on page 17.
Steps 1 through 6.
2. Attach chains/ straps and load spreader to the lifting eyes.
3. Using an appropriate lifting device, slowly pull the chains/straps until they are taught
and will support the platform when hydraulic pressure is relieved. If the platform is not in
the fully raised position, continue to pull the platform up until it reaches the fully raised
position. Use a 4,000 lb. capacity device to perform this function.
When lifting the platform by the lifting eyes, ensure cable/chain/straps pull
vertically on the lifting eyes.
