TM 5-6115-465-34
NAVFAC P-8-625-34
T.0. 35C2-3-446-2
TM 06858B/06859D-34
(q) Install screen guard (6) and secure
(a) Secure end bell assembly (34, figure
with lockwashers (5) and screws (4).
(32). Torque screws to 31 ft-lb.
(r) Install drip cover (3) and secure with
lockwashers (2) and screws (1).
(b) Feed electrical leads through gasket
(10) and insert them through loosely assembled lead
(s) Remove steel bar securing rotor to
block (9).
stator and install lifting eye bolt on generator stator.
(c) Pull all slack from the leads and
tighten the clamping screws of lead block.
e. Testing. Perform winding resistance test,
high potential test, and insulation resistance test
(d) Secure lead block and gasket to and
using equipment and procedures specified in Military
bell assembly wing lockwashers (8) and screws (7).
standard MIL-STD-705.
(e) Using a suitable lifting device stand
f. Installation. Install generator assembly in
the stator assembly on the end bell.
reverse order of removal procedures.
5-16.1. The field flash circuit consists of the
NOTE
following components: The speedswitch, K5 relay
(located on A5 board). current limiting resistor,
Use blocking as necessary to maintain
exciter field windings. associated wiring.
stator in the vertical position.
a. Testing Stator, Exciter (On Equipment
(f) Remove the lifting eye bolt from the
T e s t ) . Locate end disconnect the exciter stator
winding resistance using an ohmmeter. On the
stator and install it in the coupling disc end of the
15 KW and 30 KW generator sets. leads (F1-F2)
rotor shaft.
are located on a terminal board near the static
exciter/voltage regulator control box. Check
across F1 and F2 for resistance. A normel re-
CAUTION
sistance reading of 1 to 4 ohms should be found.
If the resistance of the exciter winding is not
Use extreme care when installing rotor
to avoid damage to the generator wind-
as specified, refer to the applicable section
ings.
of the TM for replacement/repair of the exciter
stator winding.
(g) Using a suitable lifting device, install
b. Equipment Test of Field Flash Circuit.
the rotor (25) into the stator (26).
Assuming the exciter stator winding resistance
is correct (within 1 to 4 ohms, Pore 5-11a)
(h) Temporarily secure rotor to stater as
connect e DC voltmeter (0 to 30 volts] to the
in disassembly (see figure 5-37).
two wires that were disconnected from the exciter
stator windings. NOTE: Do" not reconnect the wires
(i) Carefully set the stator on its mount-
to F1 and F2 at this time.
ing feet.
c. Remove connector (P37) from the speed
(j) Press new bearing (23) onto adapter
switch. Place a jumper between pins A and C on
(24).
P37. Momentarily (10 to 15 seconds) piece the
"start-stop-run" switch in the start position
(k) Install bearing and adapter and se-
and observe the DC voltmeter. If the voltmeter
cure with a flat washer and screw (18).
indicates approximately 24 volts, the probable
cause of the field flash failure is the speed
(1) Remove screw and replace flat washer
switch. If a DC voltage is not present. proceed
with lockwasher (19). Torque screw (18) to 88 ft-lbs.
to the next step.
(m) Install bearing housing (22) and se-
d. Remove connector (P3) from the speed switch.
cure with lockwashers (21) and screws (20). Torque
Place a jumper between pins A and C of socket
screws to 31 ft-lbs.
(J3) on the special relay box For approximately
24 volts DC. If DC voltage is not present.
the problem may be the wiring between the speed
NOTE
switch and the special relay box. the K5 relay
or currant limiting resistor (R35) inside the
Center bearing housing in end bell prior to
special relay box (15 KW and 30 KW generator
torquing screws.
sets only]. If a voltage is present. replace
connector (P31 on socket (J3) and proceed to
(n) Install screen guard (13) and secure
the next step.
with lockwashers (12) and screws (11).
e. Remove connector (P9) from the static
(o) Install cover (16) and secure with lock-
exciter/voltage regulator control box. Momentarily
washers (15) ad screws (14).
hold the "start-stop-run" switch in the start
position and check between pins C and D of P9
(p) Install cover (17) into bearing housing.
for approximately 24 volts DC. If a DC voltage
5-75
Change 5
