73-11-04
ALL ú
ú C01 Page 414
ú Jul 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 424-006-C00
(2) Install the fuel nozzle:
(a)
Lightly apply the new O-ring with petrolatum.
(b)
Install the O-ring on the fuel nozzle.
(c)
Install the new C-ring seal into the gasket.
(d)
Put the gasket on the fuel nozzle flange.
CAUTION: MAKE SURE THE FILTER SCREEN IS IN ITS POSITION AND IS
_______ INSTALLED CORRECTLY IN INLET OF THE FUEL NOZZLE. THIS CAN PREVENT DAMAGE TO THE ENGINE.
(e) Before you install the fuel nozzle, make sure the filter screen is installed in inlet of the fuel nozzle. 1) If there is no filter screen, replace the fuel nozzle.
NOTE: The filter screen are installed only in the
____ PARKER-HANNIFIN fuel nozzle.
(f) Before you install the fuel nozzle with permitted damage, visually examine the inlet strainer for contamination. 1) If the inlet strainer looks clogged, carefully remove the
inlet strainer with a small pick. 2) Clean and/or replace the inlet strainer.
NOTE: If a new strainer is not available, you can get a
____ serviceable inlet strainer from a used fuel nozzle.
3) You can clean the inlet strainer by hand in clean fuel or solvent and blow the contamination out with air (15 to 25 psi [100-170 Kpa]).
CAUTION: DO NOT USE FORCE TO PUSH THE FUEL NOZZLE INTO THE
_______ COMBUSTION CASE. DAMAGE CAN OCCUR TO THE FUEL NOZZLE AND COMBUSTION CASE.
DO NOT USE THE FUEL NOZZLES WITH FLANGE PINS ON COMBUSTION CASES THAT DO NOT HAVE MOUNTING PADS SCALLOPS. DAMAGE CAN OCCUR TO THE FUEL NOZZLE AND COMBUSTION CASE.
FUEL NOZZLES WITHOUT FLANGE PINS CAN BE INSTALLED ON COMBUSTION CASES WITH AND WITHOUT MOUNTING PAD SCALLOPS. FUEL NOZZLES WITH FLANGE PINS CAN ONLY BE INSTALLED ON COMBUSTION CASES WITH MOUNTING PAD SCALLOPS.
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73-11-04
ALL ú ú C01 Page 415 ú Jul 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(g) Point the fuel nozzle tip forward to install the fuel nozzle
into the combustion case.
(h) Carefully, turn the fuel nozzle counterclockwise while you push
it in to the mounting pad.
1) Move the fuel nozzle rearward to connect nozzle tip into
the combustor swirl cup.
2) If the fuel nozzle flange has extended bolt holes, install
the fuel nozzle as far as the hole allows.
(i) Install 43% flow, large tip, fuel nozzles at the positions
7, 8, 14 and 15 above and below igniter plugs.
NOTE: The fuel nozzles with 23% flow are not recommended for____
CFM56-3 engines.
(j) Install standard flow fuel nozzles at all other positions
(1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 16, 17, 18, 19 and 20).
(k) Apply graphite grease to threads and friction surface of the
bolts.
(l) Install the bolts to attach the fuel nozzle and gasket (and
brackets as necessary) to the combustion case.
NOTE: Make sure you use the correct length bolts at positions____
where there are brackets.
1) Tighten the bolts to 110-120 pound-inches
(12-14 Newton meters.)
2) Install the lockwire.
(m) Apply a drop of preventative oil (CP2850 or CP2172) on the nut
to ferrule interfaces.
CAUTION: MAKE SURE YOU TRIPLE TIGHTEN THE COUPLING NUT OF THE FUEL
_______ SUPPLY LINE TO THE FUEL NOZZLE AS FOLLOWS. IF THE COUPLING NUT IS NOT TRIPLE TIGHTENED, FUEL LEAKS CAN OCCUR.
(n) Install the coupling nut of the fuel supply line to the fuel nozzle and triple tighten as follows: 1) Tighten the coupling nut to 120-135 pound-inches
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