WABCO System Saver 318, Руководство по обслуживанию

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2 Troubleshooting
5
WABCO Maintenance Manual 31 (Revised 08-18)
No air delivery
Low air delivery
Low air pressure
Discharge line blockage Check for freeze up in the discharge line.
Check low spots and eliminate any traps in the discharge line.
Inspect and repair compressor discharge port and clear any line
restrictions. Replace damaged lines as necessary.
Check for carbon build-up. If carbon has built up, make sure cooling
lines are not kinked or restricted. If carbon has built up in the
discharge line, replace the line.
Inlet line kinked or restricted Inspect the compressor air induction line for kinks and restrictions.
Repair or replace as necessary.
Governor malfunction or
misadjustment Check for correct loader/unloader cycles of compressor.
Refer to vehicle manufacturer’s manual for governor maintenance and
troubleshooting procedures.
External contamination Replace broken, defective or dirty air filters. Clean contaminants from
surface of compressor.
Air dryer purge valve stuck open or
leaking Check for air dryer malfunction. Refer to air dryer manufacturer’s
service instructions.
Chafed or worn discharge line Replace faulty sections of discharge line.
Loose or leaking air line connections Verify all connections are secure.
Tighten to vehicle specifications where necessary.
Inspect port threads for damage. If damage is extensive, replace
cylinder head.
Damage to compressor valves and/or
valve seats Replace the cylinder head.
Leaking or malfunctioning internal
pressure relief valve Replace the cylinder head.
Noisy air compressor Loose drive hub
Loose accessory drive coupling
Check fit of drive coupling.
Ensure hub is completely seated and crankshaft nut is tight.
Inspect crankshaft for damage — replace compressor if crankshaft is
damaged.
None of the above, but condition
persists Replace the compressor.
Broken connecting rod or
crankshaft Oil starvation to crank pin or front main
bearing Check oil pressure. Verify oil passage is free of obstructions. Make
necessary repairs.
Failed power steering pump
(through-drive version only) Verify power steering pump is in correct operating order. Refer to the
component manufacturer’s service instructions.
All of the above Replace compressor.
Condition Possible Cause Solution
Table A: Compressor Troubleshooting Guide