TM 10-4610-215-24
TM 08580A-24/2
2-52. MOTOR STARTERS, TEST AND REPLACE
a. General. Inside the ROWPU junction box assembly, there are seven electrical mOtOr starters — one for
each pump motor. Because of the different sizes of the motors, there are four different motor starters; all except
the chemical feed pump motor starters are tested and replaced in the same way. These differences will be noted.
This paragraph describes testing and replacement of a typical motor starter.
b. Testing.
WARNING
ELECTRICAL HIGH VOLTAGE
Electricity can cause serious injury or death. Be certain that all
power is removed before performing maintenance on electrical
equipment.
(1) Visually inspect contacts for severely burned, pitted, or corroded contacts.
(2) Start pump motor. Refer to TM 10-4610-215-10/TM 08580A-10/1 and schematic, (figure 1-12, sheet
5 of 5).
(3) Touch or clip ground terminal of multimeter to ground lug on the junction box assembly.
(4) Touch or clip the other lead to points T1, T2, and T3 on the motor starter. Meter should read 115 ± 5
Vac at all points.
NOTE
The chemical feed pump motor starter has only two test points,
T1 and T4.
c. Motor Starter Removal. (Figure 2–55)
WARNING
ELECTRICAL HIGH VOLTAGE
Electricity can cause serious injury or death. Be certain that all
power is removed before performing maintenance on electrical
equipment.
(1) Disconnect and remove all external wires from motor starter (5).
(2) Remove three nuts (1), three lockwashers (2), and three flat washers (3) from three screws (4).
(3) Remove three screws (4) from motor starter (5) and junction box assembly.
(4) Remove motor starter (5) from junction box assembly.
d. Repair or Replace.
(1) Replace damaged or worn electrical wires.
(2) Replace all damaged nuts, bolts, screws, and washers.
(3) Replace damaged or unserviceable motor starter.
(4) Send damaged motor starter to Direct Support Maintenance for repair.
e. Installation. (Figure 2–55)
(1)
(2)
(3)
(4)
Hold motor starter (5) in place.
Insert three screws (4) in junction box assembly and motor starter (5).
Install three flat washers (3), three lockwashers (2), and three nuts (1)
Connect all external wires to motor starter (5).
on screws (4).
2-105
