alternator overhaul teknik kendaraan ringan semester 3th class xi kompetensi kejuruan (kk) sk-kd 18
TRANSCRIPT
ALTERNATOROVERHAUL
Teknik Kendaraan RinganSemester 3th Class XI
Kompetensi Kejuruan (KK)SK-KD 18
DIAGRAM ALUR PENCAPAIAN KOMPETENSI
BEFORE YOU REMOVE ALTERNATOR
Pay attention to how wires are connected
Pay attention to Alternator oreintation
Disconnect Battery!!
Check Belt tension and condition
Check wiring condition
DISASSEMBLY
Mark frames for correct reassembly Note spacers placement Identify Alternator by Part Number Note Terminal Condition & orientation
INSPECTION OF “COM” END HOUSING
Bearing condition
Stator windings Pulley condition Brush wear Internal Wiring
Connections Component
external damage
INSPECTION OF DRIVE END HOUSING (FRAME)
Bearing race housings
Frame Condition Cracks Wear Stripped threads
Mounting boss condition
ROTOR VISUAL INSPECTION
Rotor slip ring condition
Rotor Windings external condition
Shaft condition
Cooling Fan condition
TESTING ROTOR FIELD COIL
Rotor resistance GM 2.4 to 3.5 ohms Ford 3.0 to 5.5 ohms Chrysler 3.0 to 6.0 ohms
Some shop manuals give rotor specifications in amps.
ROTOR TESTING FOR GROUNDED SLIP RINGS
Inspect rotor lead soldering area
Test rotor for Grounds to shaft
Can use ohmmeter
Can use 110 Volt continuity tester
ROTOR TESTING FOR GROUND TO ROTOR ROTOR TESTING FOR GROUND TO ROTOR FRAMEFRAME
Test rotor for grounds to rotor frame (open circuit cats claw)
Should be Inspect cats
claw for signs of rubbing on stator
DIODE TESTING Check Positive
diodes for one way operation by switching leads.
Can test with diode check function of DVOM
Can check with 110V diode tester tool.
Check Negative Diodes also
Must only get continuity one way!!!
Note: Diodes can be checked on car with Sun VAT 40
TEST STATOR FOR CONTINUITY
Check Stator for Continuity between phases of windings
Usually check resistance of windings
Must be same resistance
TEST STATOR FOR GROUNDS
Make sure Stator windings are not grounded to frame!
Inspect windings for worn spots on windings.
Check looseness
DELCO REMY 25SI AND 30SI ALTERNATORS
ADVANTAGES OF HEAVY DUTY 25-SI ALTERNATOR
BRUSHLESS - ROTOR WORKS ON PERMANENT MAGNETISM
BELT OR GEAR DRIVEN12V, 24V, 32V85 AMP TO 300 AMP CAPABILITYELECTRONIC REGULATOR12V - 24V COMBINATION OUTPUTSOME ARE OIL COOLED
LOTS OF WIRE CONNECTIONS!!!
25SI ROTOR Rotor doesn’t spin
in this alternator Stator is
stationary also Inspect Rotor and
stator for interference
Check stator and rotor as any other alternator
25SI ROTOR HOUSING Inspect for
interference Inspect bearing races Remove bearing race
with bearing splitter Inspect D.E. Bearing Inspect C.E. Bearing Inspect Housing
threads and condition
REPAIR
Clean components OK to clean in solvent but make sure dry
Replace Bearings Don’t spin bearings Inspect races closely Use proper procedures to replace and
remove bearings.Replace Brushes and SpringsReplace other faulty components
REASSEMBLY
Proper TorquePaint Housing if necessaryUse Lock Tight on H.D. AlternatorsMake sure there is no tension on
wiringMake sure connections are tight!!Always retest output after Overhaul.
CONVENTIONAL REGULATOR CHECKING
IG and F terminalResistanceFree : 0Pulled : in about 11
L and E terminalVoltage regulator resistanceFree : 0Pulled : in about 100
CONVENTIONAL REGULATOR CHECKING
B and E terminalFree : unlimitedPulled : in about 100
B and L terminalFree : unlimitedPulled : 0
N and E terminal23
Final Bench TestingCheck amperage output
Look up specifications In book Listen for abnormal noises
Check internal regulator operation Make sure cutoff voltage is correct.
Test Light/Indicator circuits also.Reinstall on Vehicle
BIBLIOGRAPHY:
Manual BookToyota Kijang 5 K, Toyota Astra Motor
www. Autoshop101.com
www.carrersnet.com
SMKN 1 MAGELANG