(2) Remove bolts (9) and nuts (6) securing
clamps (7 and 8) together.
(3) Remove bolt (14) and nut (16) securing
clamp (17) to bracket (15).
(4) Remove two bolts (10 and 11) and nuts (12)
securing the lead to the fireshield. Remove the lead.
Bolt (10) also secures the accumulator bracket and
spacer to the fireshield.
(1) Inspect the outer part of the lead for braid
damage; replace lead if there are more than five broken
strands in any localized area, the braided conduit is
punctured, or discolored and brittle from extreme heat.
(2} Inspect terminals of lead to ensure all parts
are intact and no pitting is evident; replace lead if any
part is missing or pitting is present.
(1) Insert the igniter lead (18) through the hold
in the fireshield. Secure the lead to the fireshield with
bolt (11) and nut (12). Secure accumulator clamp,
spacer, and igniter lead with bolt (10) and nut (12).
Tighten the nuts to 35-40 in. lb.
(2) Connect the igniter lead to the ignition
exciter (3) and tighten the coupling nut to 50-70 in. lb.
(3) Connect the igniter lead to the spark igniter
(19) and tighten the coupling nut to 70-90 in. lb.
(4) Secure the lead to the air tubing at the
power turbine governor with four clamps ( 7 and 8), two
bolts (9) and nuts (6). Tighten the nuts to 35-40 in. lb.
(5) Secure the igniter lead to bracket (15) with
clamp (17), bolt (14) and nut (16). Tighten the nut to
35-40 in. lb.
d. Ignition System Check. The following procedure
can be used to check the operation of the ignition sys-
To preclude the possibility of the combustion
chamber becoming misalined, do not remove the
fuel nozzle and the spark igniter at the same time.
(1) Remove the spark igniter lead (18) from
(2) Remove the spark igniter (19).
To prevent damage to the igniter, when
assembling or disassembling a lead and
an igniter which is not installed on the
engine, turn the lead nut and not the spark
(3) Attach the spark igniter lead to the spark
(4) Apply 28 volts dc across the ignition exciter.
Observe or listen for spark.
(5) Install spark igniter and spark igniter lead
on the engine. Tighten the spark igniter to 150-200 in.
lb. and lockwire to the fuel nozzle. Tighten the lead to
70-90 in. lb.
Section VI. MISCELLANEOUS ACCESSORIES
5-38. Burner Drain Valve.
Use a wrench on the drain valve boss to offset
torque when removing or installing the valve.
(1) Remove lockwire and remove nut ( 16, figure
3-8) from the drain valve (14). Disengage bracket (15)
and remove the drain valve from the outer combustion
case. Discard preformed packing (13).
(2) Flush the valve with petroleum solvent
(item 3, table 2-2). Pass solvent through the valve to
ensure that it is open.
(3) Blow dry with clean compressed air.
Test the valve to ensure that it closes by applying air
pressure (8 psig maximum) to the valve inlet or test as
described in paragraph 5-38
(1) Soak the valve in solvent (item 16, table 2-2).
(1) Lubricate new preformed packing (13) with
oil (item 7 or 8, table 2-2) and place on drain valve (14).
Install the drain valve in the outer combustion case