Installation Guide
Table Of Contents
- D4-9 Manual
- Table of Contents
- Introduction
- Shipping Information
- Safety
- Additional Product
- Components
- Specifications
- Installation Checklist
- Installation
- Safety Rules
- Using Tools
- Clearances
- Usable Area
- Selecting a Location
- Planning for Electrical Work
- Unloading and Unpacking
- Selecting your Power Post Location
- Creating Chalk Line Guides
- Moving the Posts into Position
- Installing the Crosstubes
- Raising the Crosstubes
- Installing the Runways
- About Safety Locks
- Installing the Safety Lock Release Mechanism
- About the Pivot Pieces
- Installing the Top Caps
- Routing the Lifting Cables
- Installing the Safety Covers
- Installing the Power Unit
- Installing the Flex Tube
- Hydraulic Fluid Contamination
- Installing the Hydraulic Hose
- Working with Compression Fittings and Tubing
- Installing the Return Line
- Contacting the Electrician
- Connecting to a Power Source
- Adding Hydraulic Fluid
- Installing a Power Disconnect Switch
- Installing a Thermal Disconnect Switch
- About Embedment
- Anchoring the Posts
- Final Leveling
- Installing Accessories
- Lubricating the Lift
- Performing an Operational Test
- Final Checklist Before Operation
- Operation
- Maintenance
- Troubleshooting
- Wiring Diagrams
- Labels
- Parts Drawings
- Automotive Lift Institute (ALI) Store
D4-9 / D4-9X Four-Post Lifts 38 P/N 5900251 — Rev. A— October 2020
Working with Compression Fittings and Tubing
Your Lift comes with a roll of ¼ inch, black, polyethylene Tubing (also called Poly-Flo® Tubing) that is
used with Compression Fittings for the Return Line.
Note: Compression Fittings are different from Hydraulic Fittings. This section covers Compression
Fittings only.
The components involved with Compression Fittings include:
• ¼ inch, black, polyethylene Tubing. You use a single piece of Tubing for the Return Line.
• Elbow Compression Fittings. One on the Power Unit and one on the Hydraulic Cylinder.
• Nuts, Ferrules, Rods, and Threads. Each connector on an Elbow Compression Fitting has a
Nut, Ferrule, Rod, and Threads (see drawing below). The Nut holds the Tubing and Fitting
together. The Ferrule compresses when you tighten the Nut on the Threads to make a secure
connection. The Rod goes inside the Tubing so that nothing leaks out.
The following drawing shows the components of a connector on an Elbow Compression Fitting.
Important:
Ferrules can only be tightened once
. When you tighten the Nut on the Threads,
the Ferrule gets compressed; it literally changes shape and
cannot
be used again.
To connect Tubing to a Compression Fitting:
1. Push the Tubing through the Nut and Ferrule and over the Rod.
Do not push hard; you only need the Tubing to go a little way over the Rod. You may not be able
to see the Ferrule at this point, but the Tubing must go through the Ferrule and over the Rod.
2. Slide the Nut on the Tubing
away from the Fitting
; if the Nut is still on the Threads, unscrew it
from the Threads and then slide it away from the Fitting. See the drawing above.
3. Slide the Ferrule over the Tubing, away from the Fitting and towards the Nut.
4. With the Nut and the Ferrule out of the way, push the Tubing further over the Rod until it stops. Do
not push hard.
5. Slide the Ferrule and the Nut back to the Threads on the Fitting.
The Ferrule goes around the Rod and under the Threads. The Nut goes onto the Threads.
6. Tighten the Nut.
Remember that the Ferrule can only be used once; do not tighten the Nut until everything is ready.