ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
2-44.5 Installation.
a.
Insert FREQUENCY meter (HERTZ) (31, FIGURE 2-14) into control panel.
b. Install screws (29) and nuts (30).
c.
Connect electrical leads and remove tags.
d. Raise and secure control panel.
e.
Connect negative battery cable and close access door.
2-45 AMMETER (PERCENT RATED CURRENT).
2-45.1
a.
b.
c.
d.
2-45.2
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
2-45.3
a.
b.
c.
d.
e.
f.
Inspection.
Shut down generator set.
Release control panel by turning two fasteners and lower control panel slowly.
Inspect ammeter (PERCENT RATED CURRENT) for cracked lens, loose mounting, corrosion, and other damage.
Raise and secure control panel.
Testing.
Shut down generator set.
Release control panel by turning two fasteners and lower control panel slowly.
Tag and disconnect wire 162A from terminal 1 of ammeter (PERCENT RATED CURRENT).
Set multimeter for AC current and connect between disconnected wire 162A and terminal 1 of ammeter (PER-
CENT RATED CURRENT).
Start and operate generator set at rated voltage and frequency. Apply some load to generator set.
Observe and note indications on multimeter and ammeter (PERCENT RATED CURRENT).
Shut down generator set.
Calculate the percent of current from the multimeter indication using the following formula:
Percent of Current =100 x Multimeter Indication
0.75 amperes
Compare calculated percent of current to ammeter (PERCENT RATED CURRENT) indication noted during
operation. If difference is greater than 10%, replace ammeter (PERCENT RATED CURRENT).
Remove multimeter, connect wire 162A to ammeter (PERCENT RATED CURRENT) and secure control panel.
Removal.
Shut down generator set.
Open left side engine access door and disconnect negative battery cable.
Release control panel by turning two fasteners and lower control panel slowly.
Tag and disconnect ammeter (PERCENT RATED CURRENT) (34, FIGURE 2-14) electrical leads.
Remove screws (32) and nuts (33).
Remove ammeter (PERCENT RATED CURRENT) (34) from control panel.
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