Malfunction In The Engine Starting Circuit; Alternator - Carrier DM-4 Power Pack Operation And Service Manual

INDICATION/TROUBLE
3.1.3 Starter Motor Malfunction (CONTINUED)
Starter motor turns but pinion
does not engage
Starter motor does not
disengage after switch was
depressed
Pinion does not disengage after
engine is running
3.1.4

Malfunction in the Engine Starting Circuit

No power to starter motor
solenoid
Fuel solenoid does not
energize or does not remain
energized
3.2

ALTERNATOR

Alternator fails to charge
Low or unsteady charging rate
Excessive charging rate (as evi-
denced by batteries requiring to
frequent refilling) or fans noisy
due to excessive speed
Noisy alternator
POSSIBLE CAUSES
Pinion or ring gear obstructed or worn
Start switch defective
Starter solenoid defective
Defective starter
Battery Defective
Loose electrical connections
Battery Defective
Loose electrical connections
Oil pressure safety switch defective
Run relay defective
Water temperature cut out defective
Fuel solenoid defective
FRONT-OFF-REAR switch defective
Battery condition
Alternator belt loose or broken
Loose, dirty, corroded terminals, or broken leads
Excessively worn, open or defective brushes
Open blocking diode
Regulator faulty
Open isolation diode
Open field coil
Alternator belt loose
Loose, dirty, corroded terminals, or broken leads
Excessively worn, sticky or intermittent brushes
Faulty regulator
Grounded or shorted turns in rotor
Open, grounded or turns in stator
Regulator leads loose, dirty, corroded terminals, or wires
broken
Defective regulator
Defective or badly worn V-belt
Worn bearings
Misaligned belt or pulley
Loose pulley
3-2
REFERENCE
SECTION
Clean both,
remove burrs,
or replace;
apply grease
Replace
Engine Manual
Engine Manual
Check
Tighten
Check
Tighten
Replace
Replace
Replace
Engine Manual
Replace
Check
4.4
Check/Repair
Check
Check
Check
Check
Replace
4.4
Check/Repair
Check
Check
Check
Replace
Clean/Repair
Check
4.4
Replace
4.4
Tighten