TM 5-3895-383-24
1.
Loosen drive belt for alternator:
Make an adjustment to put the correct tension on
the drive belt.
2.
Charging or ground return circuit or battery connections
have a defect:
Inspect all cables and connections. Clean and
tighten all connections. Make replacement of
defective parts.
3.
Alternator regulator has a defect:
Replace the alternator regulator.
4.
Alternator brushes have a defect:
Install new brushes.
5.
Rectifier diodes have a defect:
Make replacement of rectifier diode that has a
defect.
6.
Rotor (field coil) has a defect:
Install a new rotor.
Problem 32: Alternator Charge Too High
Probable Cause(s):
Alternator
Or
Alternator
Regulator
Has
Loose
Connections
Alternator Regulator Has A Defect
1.
Alternator or alternator regulator has loose connections:
Tighten all connections to alternator or alternator
regulator.
2.
Alternator regulator has a defect
Replace the alternator regulator.
Problem 33: Alternator Has Noise
Probable Cause(s):
Drive Belt For Alternator Is Worn Or Has A Defect
Loose Alternator Drive Pulley
Drive Belt And Drive Pulley For Alternator Are Not In
Alignment
Worn Alternator Bearings
1.
Drive belt for alternator is worn or has a defect:
Install a new drive belt for the alternator.
2.
Loose alternator drive pulley:
Check key groove in pulley for wear. If groove is
worn, install a new pulley. Tighten pulley nut
according to the Specifications Section of the
Service Manual.
3.
Drive belt and drive pulley for alternator are not in
alignment:
Make an adjustment to put drive belt and drive
pulley in correct alignment.
4.
Worn alternator bearings:
Install new bearings in the alternator.
Problem 34: Fuel In Lubrication Oil
Probable Cause(s):
Defective Seal On Fuel Injector
Defective Fuel Injector(s)
Porosity In Cylinder Head
Porosity In Fuel Filter Base
Defective Seal In The Fuel Transfer Pump
1.
Defective seal on fuel injector:
Check for a defective O-ring seal on the top of the
injector. Remove the fuel supply line at the rear of
the cylinder head and pressurize the cylinder head
(the return to fuel tank line will have to be blocked).
Look for fuel leaking from the injectors where they
seal with the cylinder head. If fuel is leaking from
an injector, remove the injector and replace the
upper O-ring seal. Also depending on the amount
of leakage an oil sample should be taken and
checked for fuel dilution. Change oil and oil filter if
necessary.
2.
Defective fuel injectors:
A defective fuel injector can allow fuel to leak into
the lubrication oil. Remove and check the fuel
injectors. Use the 1U6661 Pop (Injector) Tester to
check the injectors for proper operation. Refer to
Special
Instruction,
SEHS8867
for
additional
information.
3.
Porosity in the cylinder head:
Pressurize the fuel gallery and check for porosity
around the oil drain back holes. If porosity is found,
replace the cylinder head.
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