HD-973P Series Multi-Level Parking Lift 47 P/N 5900076 — Rev. B3 — January 2024
About Thread Sealants
We recommend using a Liquid Thread Sealant (like Loctite™ 5452 or similar PTFE Thread Sealant) to
seal the Hydraulic components on your Lift.
Liquid Thread Sealant lubricates and fills the gaps between the Fitting threads and leaves no particles
that could contaminate the Hydraulic Fluid. Other types of sealants (like Teflon Tape) can shred during
installation or maintenance and eventually enters the Hydraulic System.
Thread Sealant can be used with most Hydraulic Fittings, although you only need it for Hydraulic
Fittings with NPT connectors.
Apply the thread sealant when the ambient temperature is between +46.5°F to +70°F (+8°C to 21°C).
To apply Thread Sealant:
Make sure the Fittings and connectors you are going to use are clean and dry.
If you are adding Thread Sealant to a Fitting or connector that has already been used with a
different Sealant, use a wire brush to thoroughly remove the old Sealant before adding more.
Apply a small amount of Thread Sealant to the first four threads of the Fitting.
⚠ WARNING Make sure to wear the proper protective equipment when using Thread Sealant.
You only need a small amount because the Sealant will spread to the other threads as the Fitting is
tightened into place.
If you put too much, the excess liquid will be pushed out when the Fitting is tightened; use a rag to
wipe the excess.
Tighten the Fitting into the connector; do not over tighten the Fitting.
Allow the manufacturer-recommended curing time before pressurizing the system.
Installing the Hydraulic Hoses
The Hydraulic Hose moves Hydraulic Fluid from the Power Unit to the Hydraulic Cylinder, which raises
the Runways. Your Lift comes with two Hydraulic Hoses: one longer (Upper Platform), and one
shorter (Lower Platform).
To install the Hydraulic Hoses, you will need:
• The Hydraulic Hose. The Straight end attaches at the Hydraulic Cylinder and the Curved end
attaches to the Platform Selector Valve (on the Power Unit). One Hydraulic Hose per Platform.
• JIC x NPT Elbow Fittings (P/N 5550106). The JIC end attaches to the Straight end of the
Hydraulic Hose and the NPT end to the Hydraulic Cylinder. One Fitting per Platform.
• JIC x NPT Nipple Fittings (P/N 5550147). The JIC end attaches to the curved end of the
Hydraulic Hose and the NPT end to the Platform Selector Valve. One Fitting per Hydraulic Hose.
• NPT x ORB Nipple Fitting (P/N 5550093). The NPT end attaches to the Platform Selector
Valve and the ORB end attaches to the Power Unit. One Fitting total.
The figure on the following page details the Hydraulic Hose routing on the Lift.
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