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26-SI ALTERNATOR
1G/287 4/96
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9. Push square plastic retainers for diode junction studs
(13) into square holes in heat sink. Insert metal studs
into holes in retainers and push in until shoulder on stud
is seated against retainer. This spreads the retainer legs
and secures the retainers in the holes. (See Fig. 34)
10. ! IMPORTANT
Avoid getting silicone dielectric grease on diode lead
clips or on electrical contact surfaces around mounting
screw holes on top of heat sink. If grease does get on
these areas, wipe away with a clean cloth slightly
dampened with a grease-dissolving solvent and allow
to dry.
Using silicone dielectric grease (1974984) for heat
transfer, coat mounting area in rectifier end housing
and both sides of insulator to be placed between diode
heat sink and rectifier housing. Place insulator flat in
rectifier end housing over mounting holes. Coat back
side of heat sink with same grease, in the area where it
will contact the housing. Position inside insulating
washer for output terminal between hole in housing
and slot in heat sink. Install heat sink assembly (14)
to rectifier end housing (1) over insulator (50), aligning
mounting holes. Install insulators (51), flat washers
(39), and 2 heat sink attaching screws (31) that will not
have electrical connections. (See Fig. 35) Insulators
must be next to the heat sink. Finger tighten screws.
Edge of insulator should be visible all around heat
sink.
• Position new in-frame diodes (10) to rectifier end
housing (1) so that leads will reach the diode junction
studs (13). (See Fig. 33) Using suitable diode
installation tools, press new diodes into housing.
• Position new heat sink diodes (11) to heat sink (12)
so that leads will reach the diode junction studs (13).
(See Fig. 34) Using suitable diode installation
tools, press diodes into heat sink.
17
Figure 33. Installing In-Frame Diodes
Figure 34. Installing Heat Sink Diodes
Figure 35. Installing Heat Sink
1. HOUSING ASSEMBLY
10. IN FRAME DIODE (3)
10
1
11. HEAT SINK
DIODE (3)
12. HEAT SINK
13. STUD
PACKAGE (3)
25. NUT (3)
31. SCREW (4)
39. WASHER (4)
51. INSULATOR (4)
31
39
25
51
11
12
13
1. HOUSING
14. HEAT SINK
ASSEMBLEY
13. STUD PACKAGE
16. TERMINAL
17. TERMINAL
31. SCREW
39. WASHER
50. INSULATION
51. INSULATOR
31
39
51
16
17
13
14
50
1
26-5029
26-5039
26-5027