TM 55-1730-229-12
AC 320A0-OMM-000
TO 35C2-3-473-1
TM 1730-12/1
PRESSURE TRANSDUCER.
(2) Solder wire (27) to transducer
terminal (28).
NOTE
HOSE
AND
4-79. PNEUMATIC
OUTPUT
See table 4-2, Malfunction 100 for
COUPLER.
test.
a.
Inspect.
(See figure 4-55.)
a. Remove.
(See figure 4-55.)
(1) Inspect pressure transducer
(19) for cracks or dents. No cracks or
(1) Loosen clamp (2) to remove
coupler (1). Save clamp for installing
dents are allowed.
replacement coupler.
(2) Inspect tube assembly (22) and
(2) Remove hose (3) from bulkhead
fitting (16) and elbow (18) for cracks
or bent tubing. Replace if damaged.
elbow (10) by loosening clamp (2). Save
clamp for installing replacement hose.
Remove.
(See figure 4-55.)
b.
(1) Disconnect wire (27) from
(See figure 4-55.)
b.
Install.
transducer (19) by unsoldering wire from
terminal (28).
(1) To install hose (3), slip
clamp (2) on hose and install hose on
(2) Remove transducer (19) by un-
bulkhead elbow (10). Position clamp and
tighten securely.
threading from elbow (18).
c. Install.
(2) To install coupler (l), slip
(See figure 4-55.)
clamp on hose (3) and install hose on
(1) Thread transducer (19) onto
coupler. Position clamp and tighten se-
curely.
elbow (18).
MAINTENANCE OF IGNITION SYSTEM
Section XIII.
4-80. GENERAL. The
tronic switch in the ECU prevents power
ignition
system,
from being applied to the ignition unit
figure 4-58, consists of:
an ignition
unit, an igniter plug, a starter assem-
until the engine reaches 10% speed dur-
ing the start cycle. Another switch in
bly, control circuits, switches, relays,
the ECU removes power from the ignition
and contactors.
unit when the engine reaches 95% speed.
When energized, the ignition unit pro-
a. Ignition Unit and Igniter Plug.
The ignition unit, figure 4-59, is ener-
vides intermittent high voltage pulses
gized by application of +28 vdc from the
to create a spark across the air gap of
ECU control circuit. Power (+28 vdc) is
The igniter plug
the igniter plug.
applied to an ECU Al driver and limiter
ignites the air/fuel mixture in the en-
when the ENGINE CONTROL switch is set to
gine combustion chamber during the start
cycle.
START/RUN positions. Note that an elec-
