Lamp Bank Load - Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual

PIPER CHEROKEE WARRIOR SERV I C E M A N U A L
On air-conditioned aircraft, full alternator output on ground
must be limited to not more than 10 minutes. Refer to Pilot's
Operating Handbook.
a. Check airplane is positioned so prop blast will not interfere with other operations going on near by.
Start engine and set throttle for 1000 to 1200 rpm.
b. Switch on the following loads and observe ammeter output increase as follows:
1 Rotating beacon - 3 to 6 amps.
2 Navigation and instrument lights (bright position) - 4 to 6 amps.
3 Landing light - 7 to 9 amps.
If alternator does not meet above readings refer to troubleshooting chart. Follow troubleshooting pro-
cedure outlined on the chart. Check each cause and isolation procedure under a given trouble.
On airplanes without night-flying equipment, load required by test can be simulated by connecting a
lamp-bank load consisting of 8 landing lights wired in parallel from main bus (+) to airframe ground (-), (refer
to Figure 11-2) or 8, 3-ohm, 100-watt resistors.
Alligator Clips
11-9. OVERHAUL OF PRESTOLITE AND ELECTROSYSTEMS ALTERNATORS
Complete alternator disassembly may not be required for alternator repair. However, in this section,
the complete overhaul is covered step-by-step to provide detailed information on each operation. In actual
service practice, these operations may be used as required.
11-10 DISASSEMBLY OF PRESTOLITE AND ELECTROSYSTEMS ALTERNATORS
a. Remove the two number 10-24 screws holding brush holder assembly in slip ring end head.
Remove brush and holder assembly from end head.
b. Remove safety wire from through bolts. Hold pulley with a strap wrench and remove pulley nut.
Pulley must be removed with a puller. Remove fan, woodruff key, and spacer from shaft.
c. Remove the four through bolts and tap drive end head lightly to separate drive end head and rotor,
as a unit, from stator and slip ring end head.
Revised: February 28, 1995
CAUTION
(8) 8A Landing Lights
Figure 11-2. Lamp Bank Load
2E5
Island Enterprises
60 - Ampere Alternator
ELECTRICAL SYSTEM