Spicer TPCS Troubleshooting Guide Manual de usuario Pagina 58

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Service Procedures
Final System Checkout
Test Requirements
This test requires use of a diagnostic tool (PC or handheld)
to control and monitor the functions of the Spicer TPCS, and
an accurate tire pressure gauge.
Select Highway-Loaded. Upon successfully achieving
Highway-Loaded, verify tire pressures are within ± psig of
desired pressure. If significant tire imbalance exists, balance
should be achieved by using the system to generate a short
deflate, followed by re-inflating the tires, or by manually
adjusting.
Verify governor cut-out pressure: ________________________________________ (Acceptance criteria: 120-125 psig)
Verify the Pressure Switch cycles open & closed during inflation: Yes / No
Use Diagnostic tool to verify proper configuration: ________________________________________________________
If downloadable configuration is used, verify proper pressure settings, speeds, etc. have been set.
Use Diagnostic
tool to DISPLAY SERVICE CODES.
Clear any existing historical codes.
Use Diagnostic tool to PERFORM DIAGNOSTIC TESTS.
Select channel and "Pressure Check Tires and Hold" option to pressurize each individual channel. Check for air leaks;
record the initial pressure and then the stabilized pressure 10 seconds later.
Select item "Pneumatic Control Unit," then "Read Isolated PCU Vacuum" and record PCU vacuum. Next, individually
select each channel and record System Pressure while deflating:
System Pressure: Front Rear Trailer
Initial Pressure
Pressure after 10 sec.
Acceptance criteria: Pressure should not drop.
Isolated PCU Vacuum Front Rear Trailer
(PSIA) (inHg) (inHg) (inHg) (inHg)
Acceptance criteria: Isolated PCU < 22 inHg, Individual channels ±1 inHg of Isolated PCU
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