Leveling Valve, Leak Test

M-728-005A

July (2021)

Valid for

Mack Trucks built from July 6, 2015, equipped with Barksdale suspension leveling valve.

Case description

Some trucks may experience air leaks from the leveling valve after the vehicle is parked (ignition off) for more than 10
minutes. Air can continue to be released through the exhaust port of the valve for up to 10 minutes. This is considered a
normal function of the leveling valve and could be misdiagnosed as an air leak. To conduct a proper assessment of the
leveling valve, follow the test and repair procedure. Fitting kits and leveling valves are available if any valves or fittings
show signs of leakage and require replacement.

Parts
Barksdale Repair and Fitting Kits
Item # OEM Valve | Fitting Kit |**Fitting Torque
em | Part Number| Part Number Values
1 22586531 85154049 | 13+2Nm (120
+20 ind)
2 22586327 85154049 | 1342Nm (120
+ 20 in-lb)
3 22612887 85154050 | 13+2Nm (120
+20 indb)

**Hand start all fitting into the valve, then torque to
specification.

Decommissioning the Truck for Repair

You must read and understand the precautions and guidelines in Service Information, group 70, "General Safety
Practices, Frame, Springs, Shocks & Wheels" before performing this procedure. If you are not properly trained and
certified in this procedure, ask your supervisor for training before you perform it.

Note: Information is subject to change without notice. Illustrations are used for reference only and can differ slightly from
the actual vehicle being serviced. However, key components addressed in this information are represented as accurately
as possible.

1. Park the vehicle on a flat and level surface.
2. Apply the parking brake.

3. Place the transmission in neutral or park.
4. Install the wheel chocks.

Leveling Valve Leak Test Procedure

. Start the truck and run engine until the truck reaches the proper operating air pressure of 80 psi to 120 psi.
2. Shut down the engine

3. Wait approximately 10 minutes for the air suspension system to stabilize.

Note: Due to the design of this leveling valve, it may take 10 minutes to stop adjusting height once vehicle is

parked on level surface. It is normal to hear air flowing from exhaust port of valve, or air flowing into air springs
during this time.

4. Listen for air leakage. If audible air is detected after 10 minutes, proceed to Step 5.
5. Using a spray bottle, fill it soap-and-water solution for air leak testing.
6. Spray soap-and-water solution on all fittings, airline tube connections and valve body as shown in the figure below

[27142086

7. lf air bubbles form in any area of the fittings near the valve body, retighten fittings and repeat soap-and-water
solution test.

8. If air bubbles form at airline tube connections, recut tubing, reinsert into fittings and repeat soap-and-water solution
test.

9. If any fittings show signs of leakage after steps 7 and 8 are complete, replace only the fittings that are leaking.

Note: Do not replace the entire valve.

10. Fitting kits 85154049 and 85154050 are available in PDC. See Barksdale Repair and Fitting Kits table for the
correct repair part numbers.

. If there are still bubbles present after Step 10, please replace the valve and submit the valve through normal
warranty process for further analysis.

Note: When replacing the leveling valve, do not remove the valve mounting bracket unless it is necessary.
Note: The presence of bubbles does not definitively indicate that a valve has failed.

Note: Any valve and fittings replaced under warranty will be subject to mandatory return and subsequent testing.
If all replaced parts are not returned or the valve is found to be fault free no credit will be issued.

Barksdale Leveling Valve Troubleshooting Video

A Barksdale leveling valve troubleshooting video is available on Barksdale’s website.

1. Use the link in this body of text, which goes to troubleshooting video (on YouTube). In order to access the link,
please go to www.barksdale.com (1).

2. Click on the Air Suspension Valve option from the products menu as shown in the image below (2).

Pressure »

| Valves and >

= Regulators
New Temperature » | Product Availability

Level

| Rapld Jet ..A\\ n-Stock Products Shipped

Dynalco® Products ;

Customize your own
solution

Barksdale introduces Series 650, a
new CNG Pressure Transducer

Read more »

3. (3) Once the air suspension valve page opens, scroll down to the section titled “52341 Series Air Suspension Valve
with Integral Dump.”

4. In that section you will see a link to the leveling valve leak test video under the description “Leakage Test
Troubleshooting Video Tutorial” (4) as shown in the figure below.

52341 mane @

Air Suspension Valve with Integral Dump
Integral dump feature brings the ability to quickly exhaust the air bags into one
compact package
Applications
* Tractor
- Single Valve Rear Suspension
- Dual Valve Rear Suspension
« Trailer
- Positive and Negative Dump

tA @

Leakage Test Troubleshooting Video Tutorial:
Click on the link to access the video.

Datasheets
52341 Series Datasheet

Details »

5. The link will connect to the YouTube video below.

Volvo/Mack Height Leveling Valve

Commissioning the Truck for Operation

1. Start the truck and build the air system up to normal operating pressure.
2. Remove the wheel chocks.

Warranty information

Reimbursement