TM 55-4920-431-13
Operator Preventive Maintenance Checks and Services
Within designated interval, these checks are to be performed in the order
NOTE:
listed.
D - During
A - After
B - Before
Procedures
Equipment Is
Item to be
Interval
Item
Inspected
Check for and have repaired or
Not Ready/
A
No.
B
D
Available If:
adjusted as necessary
Hand missing
Meters
Cover glasses dirty, cracked
1
or broken. Hands bent or
or bent, does
not read zero
missing. Meter must read zero.
Switch not
Switches
Check that switches are secur-
2
ely mounted to panel and oper
operational
ate properly
Indicators
Check that LED indicators are
LED is
3
broken
clean and not broken
Meter
Check that lamps are clean and
4
not broken; lampholders are
Lamps
not cracked, chipped, or
broken
Binding
Check that plastic caps are not
5
Posts
cracked or chipped, caps turn
freely, posts are free of dirt
and grease
Front
Check that panel is clean, let-
6
Panel
tering is clean and legible, all
screws are installed and tight
Connectors
Check for bent or broken pins.
Connector is
7
damaged
Check that mounting screws are
installed and tight
Harnesses
Check for kinks, twists, dete-
Harness is
8
riorated insulation or sleeving.
damaged
Check that harness and panel
connectors mate properly
Case
Check hinges and latches for
9
damage. Check for cracks
and breaks
