BENDIX AD-IP INTEGRAL PURGE AIR DRYER User Manual (English)

Questions and Answers:

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Johnny HallAug 9, 2025
What to do if my BENDIX AD-IP INTEGRAL PURGE AIR DRYER won't build system air pressure?
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  Bernard HarveyAug 9, 2025
  If your BENDIX Dehumidifier isn't building system air pressure, first check that the inlet and outlet air connections aren't reversed; connect the compressor discharge to the air dryer supply port. Reconnect lines properly. Also, inspect the check valve between the air dryer and the first reservoir for proper operation and repair or replace it if necessary. A kinked or blocked discharge line can also be the culprit; check to determine if air passes through discharge line. Check for kinks, bends, excessive carbon deposits, or ice blockage. Excessive bends in the discharge line, which can collect water and freeze, may also be a cause; ensure the discharge line slopes constantly from the compressor to the air dryer with as few bends as possible. Refer to Symptom 4, Causes E & F.
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Peter PaulAug 14, 2025
Why is my BENDIX AD-IP INTEGRAL PURGE AIR DRYER Dehumidifier constantly cycling or purging?
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  Thomas GreenAug 14, 2025
  The BENDIX Dehumidifier might be constantly cycling or purging due to excessive system leakage. If gauges show leakage, test for excessive service brake system leakage. Allowable leakage: Single vehicle - 1 psi/minute either service reservoir. Tractor trailer - 3 psi/minute either service reservoir. Repair and retest as required. Another cause might be a Holset “E” type compressor. Test the Holset E Compressor unloader system with feedback line and check valve for proper operation. Make certain Holset ECON is not in use with the drop-in version of the air dryer, if so, remove and retest. When installing a Bendix Drop-In air dryer in a system equipped with a Holset E or QE compressor, remove the Holset ECON valve along with its feedback and governor control line.
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Madison OrtegaAug 25, 2025
What to do if BENDIX AD-IP INTEGRAL PURGE AIR DRYER Dehumidifier does not purge or exhaust air?
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  Christopher MendezAug 25, 2025
  If the BENDIX Dehumidifier does not purge or exhaust air, inspect the purge control line from the governor UNL (unloader) port to the control port of the air dryer for missing, broken, kinked, frozen, plugged or disconnected line. Test to determine if air flows through purge control line when compressor unloaded. Check for undrilled fittings. (See Symptom #4, Remedy C.) If air reaches the purge valve (Remedy A above), repair purge valve. See Causes, B, E, G for Symptom #4.