TM 5-4520-253-13
Table 3-2. Unit Preventive Maintenance Checks and Services-Continued
M—Monthly
Q-Quarterly
Item
INTERVAL
ITEM TO BE INSPECTED
No.
M
Q
PROCEDURE
c. Clean filter element (4), gasket (5), and bowl (3) in P-D-680 dry cleaning
solvent. Shake off excess, and dry parts with compressed air. If filter ele-
ment cannot be cleaned, replace with new element. If gasket is crack-
ed or damaged, replace it.
d. Install filter element (4) and gasket (5) in filter head (6). Place filter bowl
(3) over filter element and against gasket.
e. Swing wire bail (2) under bowl and tighten thumbscrew(1) against bot-
tom of bowl until leakproof seal is achieved.
HEATER
7
•
Newly installed heater shall be tested for carbon monoxide contamina-
tion of heated air prior to regular service. Heater used on seasonal basis
shall be tested prior to first use at beginning of season. Upon successful
completion of first test, normal test interval shall be used. If for any
reason carbon monoxide contamination is suspected, additional tests
shall be conducted as necessary to ensure safety personnel.
•
Test heated air output for carbon monoxide contamination using Carbon
Monoxide Tester (8014K [96355] or equal).
WARNING
Do not operate heater in enclosure unless ex-
haust gases are piped outside. Exhaust gases
contain carbon monoxide, a colorless,
odorless, deadly poisonous gas. Failure to pro-
vide proper elimination of the exhaust can
cause severe illness or death.
a.
Place HEATER-OFF-FAN switch in HEATER position.
b. Allow heater to completely warm up. Set room thermostat high enough
to ensure at least 10 minutes of continuous combustion during testing.
c. Cut off tips A and B of fresh tube by turning each tube end in tip breaker.
d. Insert tip A, marked with red dot, securely into hand pump inlet. Push
handle all the way in.
e. Line up pump handle guide marks with red dots on pump. Pull handle
all the way out and lock with half turn.
3-16 Change 1
