6
or 1500 operating hours, whichever comes first, for
proper operation. Should the TLV-9000 valve not meet the
elements of the operational tests noted in this document,
further investigation and replacement of the valve may be
required.
SERVICE
The TLV-9000 lift axle valve sold in North America is
non-serviceable. See your authorized Bendix service parts
outlet for a replacement valve or wiring harness, if needed.
OPERATIONAL AND LEAKAGE TESTS
There are two methods of performing operational and
leakage tests for the TLV-9000 lift axle valve
. The first
method can be performed using Bendix
®
ACom
®
diagnostic
software (which can be downloaded from bendix.com) and
the second can be completed by manually testing the valve.
1 - TESTING WITH ACOM DIAGNOSTIC SOFTWARE
ACom diagnostic software (version 6.17.4.3 or higher) is an
RP-1210 compliant, PC-based diagnostic software pro-
gram that provides the highest level of diagnostic support
for the air brake systems that use the Bendix
®
TABS-6
Advanced MC
™
module. With Bendix ACom diagnostic
software, maintenance personnel can:
• Obtain DTC information (both active and inactive DTCs)
• Retrieve event history
• Clear inactive DTCs and event history
• Verify ECU configuration
• Perform system and component tests
• Read/write customer information in the scratch pad
• Save and print information
• Receive troubleshooting assistance
Connect the computer’s serial or parallel port to the
vehicle’s diagnostic connector through an RP-1210
compliant communications device.
Figure 9 – Laptop Computer with Bendix
®
ACom
®
Diagnostic Software
USB Cable
Noregon
Adapter
J2497 (PLC)
or J1939
Lap Top
Computer
Figure 10 – Bendix ACom Start Screen
Press
Start / Next
SYSTEM DIAGRAM
Figure 4 shows a trailer air-brake schematic of a single lift
axle controlled by the TLV-9000
™
lift axle valve. The lift
axle valve operation is electronically controlled with Bendix
®
TABS-6
™
Advanced by using a load (pressure) sensor to
indicate payload weight and a leveling valve to control the
suspension height.
The valve has two air supply (inlet) ports and four air
delivery (outlet) ports. One supply port is the suspension
supply (Port 11) and the second is the lift supply (Port 1).
The valve has two ports for each delivery; Ports 21 deliver
to each suspension bag and Ports 23 deliver to each lift
bag. The exhaust port is located on the side of the valve
between the two supply ports and allows the lift bags and
suspension bags to exhaust.
Refer to Table 1 and Figures
1 and 5.
INSTALLATION REQUIREMENT
For proper TLV-9000 valve and lift axle performance, the
recommended tubing size from the reservoir pressure
protection valve to the S1 supply port shall be 3/8" O.D.
(1/4” I.D.) copper or non-metallic per SAE J844, and
maintained as such without reductions. Any restrictions
in the supply line (including fittings) may delay or prevent
the valve from operating as designed.
PREVENTIVE MAINTENANCE
Important: Review the
Bendix Warranty Policy
before
performing any intrusive maintenance procedures. A
warranty may be voided if intrusive maintenance is
performed during the warranty period.
No two vehicles operate under identical conditions; as
a result, maintenance intervals may vary. Experience is
a valuable guide in determining the best maintenance
interval for air supply system components. At a minimum,
the TLV-9000 valve should be inspected every 6 months
