Troubleshooting Symptoms Charts
B3.9 and B5.9 Series Engines
Section TS - Troubleshooting Symptoms
Air Compressor Cycles Frequently
This is symptom tree T005.
Replace the desiccant cartridge on the
Turbo/CR 2000 air dryer. Refer to the OEM
service manual. Check the air compressor duty
Air compressor pumping time is excessive
cycle. Install a larger air compressor, if neces-
sary. Refer to the Master Repair Manual,
Lubricate or replace the air dryer outlet check
valve assembly. Refer to the OEM service
ir dryer outlet check valve is sticking
Check the air governor for correct operation.
Make sure the air governor is located less than
2 feet from the air compressor. Refer to the
ir governor is malfunctioning
Master Repair Manual, Holset Air Compres-
sor, Bulletin No. 3666121.
Check the operation of check valves, alcohol
ir system component is malfunctioning
installed air system components. Refer to the
OEM service manual.
Block the vehicle wheels and check the air
system for leaks with spring brakes applied
and released. Check for leaks from the air
compressor gaskets and the air system hoses,
ir system leaks
fittings, and valves. Refer to the Master Repair
3666121 and the OEM service manual.
Check for carbon buildup. Replace the air
compressor discharge line if necessary. Check
arbon buildup is excessive in the air dis-
the turbocharger for oil leaks. Refer to
charge line, check valve, or cylinder head
Install an Econ valve, check valve, and system
-type system is not plumbed correctly
hoses. Refer to the Master Repair Manual,