Bendix Commercial Vehicle Systems PURAGUARD SYSTEM FILTER 7/04 - Manual (Page 7)

7
PuraGuard ® System Filter Troubleshooting Chart
SYMPTOMS
1. More often than normal
(monthly) sump draining
required.
CAUSE REMEDY
A. PuraGuard ® system filter
installed in incorrect
position in system.
B. Alcohol injector in
system.
C. Air dryer malfunction.
D. Compressor malfunction.
2. Bypass feature not
working.
A. Supply and delivery air
connections reversed.
A. Reverse hose connections.
A. See Figures 2 and 3 for correct installation.
B. The PuraGuard ® system filter is not
recommended to be used in conjunction with an
alcohol evaporator or injector. [The PuraGuard ®
system filter will remove the liquid or aerosol
alcohol introduced, defeat the purpose of the
evaporator/injector and require the sump to be
drained more often than usual.]
C. Check air dryer.
D. Check compressor.
3. Oil in system.
A. Supply and delivery air
connections reversed.
B. Sump not drained
regularly.
C. Filter element
maintenance interval
exceeded.
D. Air dryer malfunction.
E. Compressor malfunction.
A. Reverse hose connections.
B. Drain sump every 300 operating hours, or 8,000
miles or one (1) month.
C. Use a maintenance kit to replace PuraGuard ®
system filter element every 3600 operating
hours, or 100,000 miles or one (1) year.
D. Check air dryer.
E. Check compressor.
OPERATIONAL TEST
Build the air system to governor cutout. Shut off the engine.
Using a soap solution, check all hoses and fittings leading
to and from the PuraGuard
® system filter for leakage and
integrity. Repair any excessive leaks - exceeding a 1”
bubble in 5 seconds - before restoring vehicle to service.