Folio 525-3
AIR SYSTEM DEICER
Maintenance
(Figure 2)
To service the deicer, shut off the air pressure. Deicer may be disassembled
without removal from air line.
If deicer has transparent reservoir, remove guard (15) by rotating guard around
body (1) to 'wind out' retaining spring (14) through cutout in guard. Slide guard
off body.
Unscrew and remove reservoir (2). Remove O-ring (3), fill plug (4) and
O-rings, (7 and 8) or seal (9), charge valve (11), if used, siphon tube assembly
(12) and check ball (13).
Flow sensor (10) should not be removed unless obviously damaged. If removal
is necessary, insert needle nose pliers into inlet port in body (1) and grasp point
of flow sensor. Turn sensor approximately 1/4-turn either direction and push
out through outlet port of body.
Clean transparent reservoir using clear, warm water only. Clean other pars
using soap and water. Dry parts and blow out internal passages using clean, dry
compressed air. Inspect each part carefully. Replace any parts which are
damaged.
At reassembly, make sure to reinstall flow sensor (10), if removed, with point
in direction opposite to flow arrow on body (1). Apply a wipe coat of Dow
Corning 44M grease (or equivalent) to O-ring (3). Torque dome assembly (6)
and charge valve (11), if used, to 30 – 35 in-lb (3.4 – 4.4 N•m). Tighten siphon
tube (12) until snug only. Tighten reservoir (2) by hand until arrowhead on
reservoir is in line with or to the right of arrowhead on body. Slide guard (15)
onto body and align retaining spring bead in guard with groove in body. Start
retaining spring (14) into groove through cutout in guard. Rotate guard around
body to 'wind in' the spring.
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