c. Spin rotor by hand and check freedom
d. Tighten pulley nut (40) from 35 to
TEST AND ADJUSTMENT.
a. Voltage Regulator Setting Test.
1. Equipment required
(a) Variable speed drive (2000
to 3000 RPM).
Figure 8-3. Voltage regulator
(b) Resistor (1/4 ohm 500 watt).
excitation circuit test
(d) Two 12 volt batteries.
(e) Jumper 12 inches long, No.
numbers assigned. Pay particular atten-
8 wire with two alligator clips.
tion to the following:
receptacle, to be wired as shown in figure
Refer to schematic wiring diagram
2. Connect circuit as shown in fig-
To prevent overheating and possible
tion of arrow on rear cover (15, fig-
damage to rectifier (37 and 38) diodes
tion terminal with long nose pliers
speed drive by means of a suitable belt and
a. When installing rear and front bear-
ings (47 and 49) on shaft, use hollow sleeve
4. Run alternator up to a speed be-
the same diameter of inner races and press
tween 2000 to 3000 RPM. Connect jumper
bearings on rotor assembly shaft (51). Install
wire across 1/4 ohm resistor. Run alter-
front bearing retainer (48, VIEW c).
nator under these conditions for a warm up
b. Tighten through bolts (31) evenly.
period of at least 10 minutes.