3 Troubleshooting and Testing
33
Meritor WABCO Maintenance Manual 34 (Revised 03-16)
앫 There is another check valve located between the air dryer
and the secondary air tank, usually at the supply tank.
앫 Secondary air gauge not plumbed to the secondary air
system. Use a calibrated air gauge in the secondary tank to
check air pressure.
앫 Make the necessary installation changes or repairs and
repeat the operational test.
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