TM 9-6115-604-34
NAVFAC P-8-633-34
5-40. COOLANT HEATER CONTACTORS K104A AND K104B.
a.
Inspect. See Figure 5-9.
(1)
Inspect screw and captive washer assemblies (84 and 86) and electrical connections for security.
(2)
Inspect coolant heater contactors K1O4A and K1O4B (83 and 85) for evidence of damage.
b.
Remove. See Figure 5-9.
(1)
Tag and disconnect wires from coolant heater contactors K104A and K104B (83 and 85).
(2)
Remove coolant heater contactors K104A and K104B (83 and 85) by removing screw and captive washer
assemblies (84 and 86).
c.
Test.
(1)
Connect multimeter set to RX1 scale across one set of normally closed contacts. Observe reading of less
than 1 ohm.
(2)
Repeat step (1), above, for the other set of contacts.
(3)
Connect multimeter across one set of normally open contacts. Observe reading of infinite ohms.
(4)
While continuing to observe multimeter, apply 120 V ac power source to coil. Observe reading drop from
infinite ohms to less than 1 ohm.
(5)
Disconnect 120 V ac power source from coil.
(6)
Repeat steps (3) through (5), above, for the other set of normally open contacts.
(7)
Replace coolant heater contactor K104A or K104B if any readings are not as specified.
d.
Install. See Figure 5-9.
(1)
Install coolant heater contactor K104A or K104B (83 and 85) with screw and captive washer assemblies
(84 and 86).
(2)
Make wiring connections as tagged and discard tags.
5-41. FUEL TRANSFER PUMP CONTACTOR K106.
a.
Inspect. See Figure 5-9.
(1)
Inspect screw and captive washer assemblies (82) and electrical connections for security.
(2)
Inspect fuel transfer pump contactor K106 (81) for evidence of damage.
b.
Remove. See Figure 5-9.
(1)
Tag and disconnect wires from fuel transfer pump contactor K106 (81).
(2)
Remove fuel transfer pump contactor K106 (81) by removing screw and captive washer assemblies (82).
c.
Test.
(1)
Connect multimeter set to RX1 scale across one set of normally closed contacts. Observe reading of less
than 1 ohm.
(2)
Repeat step (1), above, for the other set of contacts.
(3)
Connect multimeter across one set of normally open contacts. Observe reading of infinite ohms.
(4)
While continuing to observe multimeter, apply 120 V ac power source to coil. Observe reading from
infinite ohms to less than 1 ohm.
(5)
Disconnect 120 V ac power source from coil.
(6)
Repeat steps (3) through (5), above, for the other set of normally open contacts.
(7)
Replace fuel transfer pump contactor K1 06 if any readings are not as specified.
d.
Install. See Figure 5-9.
(1)
Install fuel transfer pump contactor K106 (81) with screw and captive washer assemblies (82).
(2)
Make wiring connections as tagged and discard tagged.
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