FSB728-005

Volvo Trucks North
America
Greensboro, NC USA
Field Service Bulletin
Trucks
Date
11.2018
Group
No.
728 005
Release
Page
01
1(4)
Leveling Valve, Leak Test
VN, VAH, VHD, VT
FSB 728-005, Leveling Valve, Leak Test
(November 2018)
Some Volvo VN, VAH, VHD, VT trucks built from July 6, 2015, and equipped with Barksdale
suspension leveling valve may experience air leaks from the leveling valve after the vehicle
is parked (Shut 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 outlined in this Field Service Bulletin
(FSB). Fitting kits and leveling valves are available if any valves or fittings show signs of
leakage and require replacement.
USA143247645
PV729-FSB728-005_V
Volvo Trucks North America
Field Service Bulletin
Date
11.2018
Group
No.
Release
728
005
01
Required Parts
Barksdale Repair and Fitting Kits
Item #
OEM Valve Part
Number
Fitting Kit Part
Number
** Fitting Torque Values
1
22612934
85154049
13 ± 2 Nm (120 ± 20 in-lb)
2
22612887
85154050
13 ± 2 Nm (120 ± 20 in-lb)
** 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.
W7086748
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Volvo Trucks North America
Field Service Bulletin
Date
11.2018
Group
No.
Release
728
005
01
Leveling Valve Leak Test Procedure
1 Start the truck and run engine until the truck reaches the proper operating air pressure of
80 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.
W7142086
7 If air bubbles form in any area of the fittings near the valve body, re-tighten fittings and
repeat soap-and-water solution test.
8 If air bubbles form at airline tube connections, re-cut tubing, re- insert 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.
11 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.
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Volvo Trucks North America
Field Service Bulletin
Date
11.2018
Group
No.
Release
728
005
01
Note: The presence of bubbles does not definitively indicate that a valve has failed.
Note: Any valve returned under warranty will be subject to mandatory return and
subsequent testing. If valve is found to be fault free no warranty credit will be
issued.
Commissioning the Truck for Operation
1 Start the truck and build the air system up to normal operating pressure.
2 Remove the wheel chocks.
W7086759
Reimbursement
This repair may be eligible for reimbursement if a
product failure was experienced within time and
mileage limits of the applicable Warranty coverage.
Reimbursement is obtained via the normal claim
handling process.
UCHP
Reimbursement
Claim Type (used only when uploading from the Dealer
Bus. Sys.)
W
Labor Code
Primary Labor Code (Leveling Valve, Leak Test)
7281-06-09-01, 0.5 hrs.
Labor Code (Air Fitting, Replacement)
5634-03-02-02, 0.4 hrs.
Labor Code (Air Fitting, Replacement) Each Additional
5634-03-03-01, 0.1 hrs.
Labor Code (Leveling Valve, Replacement)
7641-03-02-01, 0.8 hrs.
Causal Part
22612887, 22612934
Volvo Trucks North America reserves the right to make any changes in design or to make
additions to or upon its products without incurring any obligations to install the same on
vehicles previously built.
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