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1G-287 4/96
26-SI ALTERNATOR
11. NOTICE: Do not hit diodes or diode mountings with
a hammer or other tool. The shock of such an impact
can damage the diode or other diodes in the same
mounting. Use proper tools to press or pull diodes
from their mountings.
Replacing one or more diodes requires the use of an
arbor press or vise, and special diode removal and
installation tools. Such tools are available from
various automotive tool suppliers. When removing a
diode (11) from the heat sink (12), (See Fig. 20) press
diode from heat sink using an arbor press or vise.
When removing a diode (10) from the rectifier end
housing (1), (See Fig. 21) use a diode puller. As much
as 890 N (200 lbs.) of force may be needed to remove
a diode.
FINAL DISASSEMBLY
NOTICE: Do not damage exposed stator or field
windings.Bumping or scraping these windings may
break the insulation and leave a place for a short circuit
or ground to develop later, causing the alternator to fail.
Protect the windings from damage by careful handling.
12. To replace the field coil, stator assembly, rotor
assembly, or drive end or rectifier end bearings, the
drive end frame assembly must be separated from the
rectifier end housing. (Fig. 22) Use 5/16" hex wrench
or 5/16" hex drive, in the end of the shaft, to hold while
removing shaft nut (27). Remove washer (42), pulley,
and fan (23) from shaft, along with baffle and slinger
if used. Remove the 4 thru bolts (43). Carefully
separate the drive end housing from the stator and
rectifier end housing, taking care not to damage stator
windings. (See Fig. 23)
13. To remove stator from rectifier end housing, be sure
all 3 stator leads are disconnected from diode junction
studs in electronics compartment. Pry stator (5) and
Figure 20. Removing Heat Sink Diodes Figure 21. Removing Diodes from Housing
12
51
31
39
25
12
13
11
10
Figure 22. Alternator Disassembly
1. HOUSING ASSEMBLY
10. IN FRAME DIODE (3)
10
1
49
10. HEAT SINK
DIODE (3)
11. HEAT SINK
DIODE (3)
12. HEAT SINK
13. STUD
PACKAGE (3)
25. NUT (3)
31. SCREW (4)
39. WASHER (4)
50. INSULATION
51. INSULATOR (4)
1. ALTERNATOR
ASSEMBLY
23. FAN
27. NUT
42. WASHER
1
TORQUE
WRENCH
PULLEY
23
42
27
WRENCH
26-5028
26-5029
26-5030