ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
k. Install left fan guard, paragraph 2-70.5.
l.
On right side of engine, connect electrical leads as tagged to magnetic pickup (7, FIGURE 2-25), battery charg-
ing alternator (9, FIGURE 2-5), starter solenoid, starter motor, and engine heater plugs, refer to TM
9-2815-253-24. Remove tags.
m. Install front housing panel, paragraph 2-18.4.
n.
Install control box assembly, paragraph 2-21.4.
o.
Connect negative battery cable and close all access doors.
4-5 CURRENT TRANSFORMER.
4-5.1
a.
b.
c.
d.
e.
f.
g.
4-5.2
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
NOTE
Current transformer is a component of output box/engine harness assembly, but can be
removed and tested separately as follows.
Removal.
Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Remove control box assembly, paragraph 2-21.2.
Tag and disconnect current transformer (20, FIGURE 4-11) electrical leads from secondary terminals.
Tag and disconnect main power cables from front side of terminal board (16).
NOTE
Tag, count, and note number of wraps and Iocation of main power cables on current
transformer.
Unwrap main power cables from current transformer (20).
When removing current transformer, use extreme care not to drop attaching hard-
ware down onto the generator unit. Serious damage to equipment could result.
Remove screws (17), washers (18), nuts (19), and current transformer (20).
Testing.
Remove current transformer, paragraph 4-5.1.
Set multimeter for ohms and check for continuity between secondary terminals A1 and A2, B1 and B2, and
C1 and C2.
If continuity is present, continue with test. If continuity is not present, current transformer is defective and must
be replaced.
Set up a test circuit using 10 gauge wire as shown in FIGURE 4-12. Make ten passes with wire through phase
A window.
Turn on power source and load bank. Adjust load bank until 18.4 amps is indicated on ammeter.
Set multimeter for amperes, and connect to secondary terminals A1 and A2. Multimeter indication must be 0.9
to 1.1 amps.
Repeat steps d, e, and f using phase window B and secondary terminals B1 and 62.
Repeat steps d, e, and f using phase C window and secondary terminals C1 and C2.
Replace current transformer if multimeter indication in any phase is other than stated in step f.
Install current transformer, paragraph 4-5.3.
4-13
