TM 10-6640-215-13
Table 4-1. Unit Preventive Maintenance Checks and Services
Item
Interval
Item To Be
Procedure
Not Fully Mission
No.
Checked Or
Capable If:
Serviced
6
Quarterly
Environmental
Perform PMCS in accordance with
Control Units
TM 5-4120-371-14.
7
Quarterly
Purge System
a. Check purge intake and exhaust
Damaged hinges, gaskets,
doors for damage. Check screen/fil-
or latches. Screen or filter
ter, hinges, gaskets, latches, and fas-
damaged. Fasteners loose
teners.
or damaged.
b. Check purge intake and exhaust
Dampers or motors are
door dampers and motors for loose
damaged. Fasteners or
or missing fasteners and broken or
electrical connections
damaged electrical connections.
loose, broken, or damaged.
c. Check ECU intake ducts located
Ducts do not operate prop-
in the machinery room for loose or
erly; hardware loose or
missing hardware, screens, gaskets,
missing, screens or gaskets
and broken or damaged electrical
damaged, or electrical con-
connections.
nections loose or broken.
d. Check purge door limit switches
Switches damaged, fasten-
for proper operation. Check fasten-
ers missing or loose, elec-
ers and electrical connections.
trical connections loose or
broken.
8
Quarterly
Air System
NOTE
Refer to TM 10-4310-392-
13&P for further PMCS
instructions.
a. Check compressor for proper
Compressor does not oper-
operation. Check mounting hard-
ate properly. Mounting
ware and electrical connections.
hardware loose or missing.
b. Check air tank for leaks. Check
Air tank or fittings leak.
tank mounting hardware.
Mounting hardware is loose
or missing.
c. Check pressure switch and gage
Pressure switch and gage
for proper operation. Check electri-
do not operate properly.
cal connection.
Connections loose or bro-
ken.
d. Check system tubing and piping
System tubing or piping
.
for leaks
leaks.
e. Check system valves for leaks.
System valves leak.
9
Quarterly
Vacuum System
a. Check vacuum pump for dam-
Pump does not operate
age. Check mounting hardware and
properly. Mounting hard-
electrical connections.
ware is loose or missing.
b. Check system tubing and piping
System tubing or piping
for leaks.
leaks.
c. Check system valves for leaks.
System valves leak.
4-7
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