TM 5-2420-230-24-2
Troubleshooting Symptoms Charts
B3.9 and B5.9 Series Engines
Page TS-4
Section TS - Troubleshooting Symptoms
Air Compressor Cycles Frequently
This is symptom tree T005.
Cause
Correction
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,
Holset Air Compressor, Bulletin No. 3666121.
OK
A
Lubricate or replace the air dryer outlet check
valve assembly. Refer to the OEM service
ir dryer outlet check valve is sticking
.......
manual.
OK
A
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.
OK
A
Check the operation of check valves, alcohol
evaporators, air dryers, and other OEM-
ir system component is malfunctioning
.......
installed air system components. Refer to the
OEM service manual.
OK
A
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
Manual, Holset Air Compressor, Bulletin No.
3666121 and the OEM service manual.
OK
C
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
Procedrue 010-033.
OK
E
Install an Econ valve, check valve, and system
-type system is not plumbed correctly
.......
hoses. Refer to the Master Repair Manual,
Holset Air Compressor, Bulletin No. 3666121
L-588
