TM 11-6660-218-12
These checks and services are in addition to
(2) When the equipment is reinstalled
after removal for any reason.
the daily checks and services.
(3) At least once each week if the equip-
C.
ment is maintained in standby con-
ices that must be performed on a quarterly
dition.
basis. These checks and services are in addi-
tion to the daily and weekly checks and serv-
ices.
ices that must be performed once each week.
4-5. Operator's Daily Preventive Maintenance Checks and Services Chart
Sequence
References
No.
Item to be inspected
Procedure
a. TM 116675200-10.
1
Exterior and interior surfaces
for accumulation of dust and dirt.
Clean and lubricate the theodolite
set as required.
b. Inspect the remainder of the equip-
ment for dust, dirt, grease, and
fungus.
Thermometers . . . - - . .
Inspect thermometers (fig. 13 ) for
2
cracks and separated mercury col-
umns. Replace thermometer if de-
fective.
3
Gas regulator, timer, anemometer,
a. Inspect dial windows for cracks or
and barometer.
breaks.
b. Inspect for bent or broken needles.
c. Inspect the compass on the anemom-
eter (fig. 18) for signs of oil
leakage.
4-6. Operator's Weekly Preventive Maintenance Checks and Services Chart
Sequence
Item to be inspected
Procedure
References
No.
I
a. TM 11667520010.
1
Batteries in theodolite set and
a. Inspect the batteries in the theodo-
lite set (fig. 13) for signs of
telephone.
leaking or swelling. Replace de-
fective batteries.
b. TM 11-337.
b. Inspect the batteries in the tele-
phone (fig. 15 ) for signs of leak-
ing or swelling. Replace defective
batteries.
2
Calcium hydride charges --
Inspect calcium hydride charges (fig.
ing. Replace defective charges.
3
Rule, slide rule, plotting boards _.
Inspect the rule and the slide rule
worn printing. Replace defective
items.
4-2
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