TM 5-4520-208-15
(2) Install two new preformed packings
(6) Inspect capillary tubes and sensing
(2) and two preformed packings (9)
units for cracked, kinked, or collasped
in bores of block (8). Install fuel con-
condition. Replace valve if any damage
trol valve (3) and temperature selec-
is noted.
tor valve (7) in block and secure with
d. Assembly and Installation.
two bolts (10).
(1) Install stem (6, fig. 51) on shaft of
(3) Install pipe plug (1) in block.
temperature control valve (7) and
(4) Install block, with attached valves, on
drive spring pin (4) through stem and
heater (para 100).
shaft
Section III. MAGNETO
Remove sleeve bearing (28) from
158. General
support.
(8) Remove staking and remove outer flat
The magneto, driven by the power unit,
supplies the high-tension spark necessary for
washer (19), seal (20), inner flat
washer (21), and retaining ring (22)
ignition of the fuel-air mixture in the heater
combustor.
from housing.
(9) Remove magneto rotor (27) from
housing (34). Remove cork seal (26)
159. Magneto
from rotor. Remove retaining ring
(36) and ball bearing (35) from hous-
b. Disassembly.
ing.
(10) Remove two setscrews (23) from
(1) Remove four screws (1, fig. 52) and
housing and remove coil (25). Re-
lockwashers (2) and remove end cap
move screw (16), drain cover (17),
(3) and gasket (4) from housing
and screen (18),
(84). Remove cable outlet (29) from
c. Cleaning, Inspection, and Repair.
end cap.
(1) Clean all metal parts with a cloth
(2) Remove screw (14) and remove leads
dampened with an approved cleaning
and breaker arm (31) from support
solvent and dry thoroughly.
bracket (33).
(2) Wipe the coil, capacitor, and interior
(3) Remove screw (6) and lockwasher (6)
of housing with a clean, dry, lint-free
and remove capacitor (7).
cloth.
(4) Remove retaining ring (30) and re-
(3) Inspect all parts for breaks, cracks,
move breaker arm from rotor bearing
bends, damaged threads, or other
support (15).
damage. Replace all damaged parts.
(4) Inspect the points for burning or
(5) Remove screw (8), lockwasher (9),
pitting. Dress slightly burned or
and flat washer (10) and remove cam
pitted points, using a fine mill file
wick and holder (11) from rotor bar-
or point dresser. Replace the station-
ing support.
ary support bracket and breaker
(6) Remove screw (12), lockwasher (6)
arm if points are badly worn or
and flat washer (13) and remove
burned.
stationary support bracket from rotor
bearing support.
d. Assembly and Installation.
(1) Position the coil (25, fig. 52) in the
(7) Remove four screws (32) that secure
housing (34) and secure with two
rotor bearing support (15) to housing
setscrews (23). Install ball bearing
and remove rotor bearing support.
100
