Quantcast Table 5-1. Motor control preventive maintenance guide- continued

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TM 5-683/NAVFAC MO-116/AFJMAN 32-1083
Table 5-1. Motor control preventive maintenance guide continued.
WHAT TO INSPECT FOR
WHAT TO INSPECT
Check for proper rating, snug
Fuses and Fuse Clips
4.
fit; if copper, polish
ferrules; check fuse clip
pressure.
Overload Relays
Check for proper heater size;
5.
trip by hand; check heater
coil and connection; inspect
for dirt, corrosion.
Check contacts, inspect for
6.
Pushbutton Station and
grease and corrosion.
Pilot Devices
7.
Dashpot-Type Timers and
Check for freedom of movement;
check oil level.
Overload Relays
8.
Resiators
Check for signs of
overheating; loose
connections; tighten sliders.
Tighten main line and control
Connections
9.
conductor connection; look
for discoloration of current-
carrying parts.
Check sequence of operation of
Control Operation
10.
control relays;  check relay
contacts for sparking on
operation; check contacts for
flash when closing; if so,
adjust to eliminate contact
bounce; check light switches,
pressure switches, temperature
switches, etc.
5-18





 


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