(a) Remove the 4 bolts (150) which attach the OIL IN tube (240) to the OIL IN port of servo fuel heater (80). Remove and keep the gasket (155).
(b) Remove the nut (230), the bolt (200) which attach the clamps (190), (170) and (220) to the AGB bracket (180). Remove plastics bushings (160). Keep the removed parts.
(c) Cut and remove the lockwire which safeties the coupling nut (210).
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(d) Loosen coupling nut (210) to disconnect OIL IN tube (240) from the hose (215) which goes to the master magnetic chip detector.
(e) Remove OIL IN tube (240).
(4) Disconnect the FUEL OUT hose (140) from the FUEL IN nipple (10) of the servo fuel heater (80).
NOTE : It is not necessary to disconnect the FUEL OUT hose (140) from
____ the HMU to permit the removal of the servo fuel heater (80).
(5) Remove the U-shaped OIL OUT tube (130) as follows:
(a) Remove the 4 bolts (110) which attach the U-shaped OIL OUT tube
(130) to the OIL OUT port of the servo fuel heater (80). Remove and keep the gasket (120).
(b) Cut and remove the lockwire which safeties the coupling nut (135) of the hose interface (100) with the U-shaped tube (130).
(c) Loosen coupling nut (135) to disconnect the OIL OUT tube (130) from the hose (100) which goes to the oil tank.
(d) Remove the U-shaped OIL OUT tube (130).
(6) Detach the fire detection loop from bracket (40). Then, remove the six nuts (30) and washers (20) which attach the servo fuel heater (80) and the bracket (40) to the studs of the main oil/fuel heat exchanger (60).
(7) Carefully back off the servo-fuel heater (80), move it upward and remove. Keep the gasket (70).
(8) If necessary, remove the two nipples (10) from the servo fuel heater (80). Discard O-rings (90) and (95).
(9) Install blanking plugs or protective covers on all the open ports and orifices.
(10) Preserve servo fuel heater (Ref. TASK 73-11-20-620-002).
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Servo-Fuel Heater
Figure 401/TASK 73-11-20-991-300- 12 (SHEET 1)
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Servo-Fuel Heater
Figure 401/TASK 73-11-20-991-300- 22 (SHEET 2)
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TASK 73-11-20-400-002
Installation of the Servo Fuel Heater
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice
No specific Torque Wrench : range 36.00 to 220.00 lbf.in
(0.40 to 2.60 m.daN)
No specific Torque Wrench : range 96.00 to 900.00 lbf.in
(1.00 to 10.00 m.daN) R No specific Torque Wrench : range 180.00 to 1800.00 lbf.in R (2.00 to 20.00 m.daN)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. CP2101 USA MIL-T-5544 graphite grease (Ref. 70-30-00) Material No. CP2442 * engine oil (Ref. 70-30-00) Material No. CP8001 * lockwire 0.032 in. (0.8 mm) dia. (Ref. 70-30-00) Material No. CP8002 * lockwire 0.032 in. (0.8 mm) dia. (Ref. 70-30-00)
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C. Expendable Parts
-------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
R 70 gasket 73-11-20 01A-140 R 70 gasket 73-11-20 01A-140A R 90 O-ring 73-11-20 01A-020 R 90 O-ring 73-11-20 01A-020A R 95 O-ring 73-11-20 01A-020 R 95 O-ring 73-11-20 01A-020A R 120 gasket-seal 73-11-20 01A-100 R 155 gasket 73-11-20 01A-100 R
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