TM 5-6115-413-12
Figure 3-8. Fuel system components replacement (Sheet 2 of 2).
c.
Test. Connect 24v dc to the terminals of solenoid coil. If solenoid does not actuate when power is applied,
replace solenoid valve.
d.
Installation. Install satisfactory or replacement fuel solenoid valve in reverse order of removal procedure, using
new packing.
3-24. Fuel Control Unit (fig. 3-8)
a.
Removal
(1)
Remove wiring harness connector from fuel solenoid and remove all tube assemblies from fuel control
unit.
(2)
Remove four attaching nuts and washers and carefully remove fuel control unit from engine in a straight
line.
b.
Installation.
(1)
Install replacement fuel control unit on engine. Insure shaft splines are properly meshed.
(2)
Secure in place with attaching washers and nuts: Tighten nuts to 50 to 70 inchpound torque.
(3)
Connect all tube assemblies to fuel unit using new packing. Connect wiring harness connector to fuel
solenoid valve.
c.
Test. Check acceleration limiter valve cracking pressure as described in paragraph 3-8e(3). Check governor
speed setting as described in paragraph 3-8e(4).
3-25. Fuel Atomizer Assembly, Combustion Cap Assembly and Combustion Liner Assembly (fig. 3-9)
a.
Removal
(1)
Remove igniter plug electrical lead assembly from igniter plug and remove tube assembly from fuel
atomizer.
Warning
Do not remove the igniter plug or ignition unit unless they have been 'grounded. The high-
tension lead must be grounded as soon as it is removed from the igniter plug. Ground by
touching the contact spring in the lead ,to the igniter.
(2)
Loosen screw in coupling and remove combustion chamber liner assembly, coupling, combustion cap
assembly, and fuel atomizer assembly from turbine plenum.
(3)
Slide coupling over end of combustion chamber liner and remove from assembly.
(4)
Remove igniter plug as described in paragraph 3-48a.
(5)
Remove three attaching bolts and washers from fuel atomizer. Remove fuel atomizer assembly and
packing from combustion cap assembly.
(6)
Remove screen from fuel atomizer assembly housing (fig. 89).
(7)
Remove liner assembly and packing from cap assembly.
3-38
