Piper Navajo PA-31 Service Manual page 709

PIPER NAVAJO SERVICE MANUAL
359
Figure 11-11. Exploded View of Heat Sink Assembly (Delco)
11-17. HEAT SINK REPLACEMENT. The heat sink may be replaced by remov-
ing the "BAT" and "GRD" terminals from the end frame, and the screw attach-
ing the condenser
lead to the heat sink. During reassembly, note the proper
stack-up of parts as shown in Figure 11-11.
11-18. REASSEMBLY OF ALTERNATOR. Reassembly is the reverse of dis-
assembly. Remember when assembling the pulley to secure
the rotor in a vise
only tight enough to permit tightening the shaft nut to 50-60 foot pounds. If ex-
cessive pressure is applied against the rotor, the assembly may become dis-
torted. To install the slip ring end frame assembly to the rotor and drive end
frame assembly,
remove the tape over the bearing and shaft, and make sure the
shaft is perfectly clean after removing
the tape.
Insert a straight wire as previously
mentioned throughthe holes in the brush
holder and end frame to retain the brushes in the holder. Then withdraw the wire
after the alternator has been completely assembled. The brushes will then drop
onto the slip rings.
Reissued: 10/12/79
Effectivity
DELCO
ELECTRICAL SYSTEM
4B7