Piper TURBO ARROW III User Manual

Figure 11-23. Exploded View of Alternator.
11-35. DESCRIPTION OF ALTERNATOR. (Refer to Figure 11-23.)
The principal components of the alternator are the brush holder assembly (1), the slip ring end head (2),
the rectifiers (3), the stator (4), the rotor (5) and the drive end head (6).
a. The brush holder assembly contains two brushes, two brush springs, a brush holder and insulator. One
brush is connected to a terminal stud and is insulated from ground. The other brush is connected to
ground through the brush holder. The brush and holder assembly can easily be removed for inspection
or brush replacement purposes.
b. The slip ring end head provides the mounting for the rectifiers and rectifier mounting plate, output and
auxiliary terminal studs, and the brush and holder assembly. The slip ring end head contains a roller
bearing and outer race assembly and a grease seal.
c. The rectifiers used in these units are rated at 150 peak inverse voltage (P.I.V.) minimum for transient
voltage protection. Three positive rectifiers are mounted in the rectifier mounting plate while the three
negative rectifiers are mounted in the slip ring end head. Each pair of rectifiers is connected to a stator
lead with high temperature solder. The stator leads are anchored to the rectifier mounting plate with
epoxy cement for vibration protection.
d. The stator contains a special lead which is connected to the center of the three phase windings. The
stator has been treated with a special epoxy varnish for high temperature resistance.
e. The rotor contains the slip ring end bearing inner race and spacer on the slip ring end of the shaft. The
rotor winding and winding leads have been specially treated with a high temperature epoxy cement to
provide vibration and temperature resistance characteristics. High temperature solder is used to secure
the winding leads to the slip rings.
f. The drive end head supports a sealed, prelubricated ball bearing in which the drive end of the rotor
shaft rotates.
Revised: 2/13/89
2H12
CHEROKEE ARROW III SERVICE MANUAL
ELECTRICAL SYSTEM

Piper TURBO ARROW III Specifications

General

Manufacturer	Piper Aircraft
Model	Turbo Arrow III
Horsepower	200 hp
Max Takeoff Weight	2, 900 lbs
Fuel Capacity	72 gallons
Service Ceiling	20, 000 ft
Seating Capacity	4
Type	Single-engine piston
Propeller	Constant-speed
Landing Distance	1, 200 ft