e. Remove two air duct hoses (6 and 15, fig. 4).
Remove any obstructions. Also check manifolds for
f. Lift off filter and manifold in the following
traces of moisture. Report any evidence of moisture to
general support maintenance personnel.
sequence: gas filter (2, fig. 15), particulate filter (3),
intake manifold (4), particulate filter (5), and gas filter (6).
a. Stack the canister frames the following order:
76. Inspection and Maintenance
bottom manifold (7, fig. 15), gas filter (6i), particulate
a. Do not clean filters. If air flow in particulate filter
filter (5), intake manifold (4), particulate filter (3), and gas
test (para. 68) was below normal, inspect for dirty or
filter (2). Be sure filters and manifolds are properly
clogged filters. If airflow was above normal, inspect for
dents, bends, or punctures ill filters. Replace if defective.
Ordinarily, the particulate filters will be replaced when it
Caution. The filters may be placed either side
is necessary to replace the gas filters. However, tile
up, but it is important that they be stacked as
filters may be retained for further use if inspections show
directed in a above so that air will pass through the
them to be intact and serviceable. A chemical officer will
particulate filters first and then through the gas
determine the serviceability of the filters. Replace gas
filters. If not, dust and aerosols will damage the gas
filters if they fail the test in paragraph 68 or if they appear
filters, and they will have to be replaced.
b. Slide air duct hose (6, fig. 4) over bottom
b. Clean all metal parts with drycleaning solvent,
manifold (9) outlet and intake manifold (12) inlet,
and wash air duct hose with a mild solution of soap or
detergent. Dry with compressed air.
c. Lower top manifold (4) with engine or motor and
c. Inspect manifold hose for tears, holes, or
blower onto stacked frames while guiding air duct hose
punctures at connection points. Check for chafing and
over top manifold inlet and outlet.
worn edges. Replace if damaged.
d. Tighten four hose clamps.
d. Make certain that dirt or foreign matter has not
e. Position eight turnbuckles (10) and tighten.
entered air intake manifold (12, fig. 4), top manifold (4),
or bottom manifold (9). (This may happen if air inlet
cover (1, fig. 19) or screen was not fitted properly.)
Section IX. SLIDE BOLTS
b. Inspection aid Maintenance.
78. Description and Function
(1) Clean bolts, nuts and washers.
The slide bolts attach the stand assembly to the canister
(2) Check bolt threads and head for undue
assembly. The bolts when properly mounted allow the
stand assembly to be swiveled so as to position the
(3) If bolts, washers, and nuts exhibit undue
blower for either inside or outside operation.
wear as to inhibit operation, or if damaged,
Organizational maintenance personnel are authorized to
(1) Clean swivel base and install bolts in key
replace the slide bolts.
(2) Reinstall the power unit in stand assembly,
(1) Disconnect blower from top manifold by
alining bolts with stand assembly holes.
(3) Place washers over bolt and thread nuts in
(2) Remove nuts (9, fig. 16) and washers (8)
place (do not tighten).
from stand assembly.
(4) Turn blower to proper position on top
(3) Remove stand assembly with power unit
(5) Tighten nuts
(4) Slide the slide bolts (10) to the key hole
position in the swivel base and remove.