1.  
The minimum clearance is 0.25 inch (6.4 mm).

_

 2.  
Not less than 0.06 inch (1.5 mm) clearance in

_
 1.0 inch (25.4 mm) or less of clamping points. b) Mechanism (actuators, linkages, etc.):
 1.  
The minimum clearance is 0.50 inch (12.7 mm).

_

 2.  
Keep the clearance during the full travel of the

_ mechanism. c) Grouped tubes (parallel runs, intersections, etc.):
 1.  
The minimum clearance is 0.19 inch (4.8 mm).

_

 2.  
Attach clamps to the lines that go across each

_ other to get the minimum clearance of 0.12 inch
 (3.0 mm).
 (q)  
Coupling nuts must turn freely in you hand.

 (r)  
The mating surfaces of the flanges of the tube must be installed at 90 egrees to each other.

 CAUTION: USE TWO WRENCHES TO REMOVE AND INSTALL THE TUBE OR HOSE
_______ COUPLING NUTS: ONE TO HOLD THE NIPPLE FITTING AND ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT. IF YOU DO NOT, DAMAGE TO EQUIPMENT CAN OCCUR.
 (s)  Make sure the fasteners are installed correctly after you tighten them to the specified value.
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737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(t)  Attach lockwire, CP8001 or CP8006, to the connection.
 NOTE: Make sure the lockwire is corrosion resistant steel.
____
 S 912-024-C00
 (3)  If it is necessary, replace the damaged hose as follows:
 WARNING:_______DO NOT PERMIT FUEL TO TOUCH YOUR SKIN OR CLOTHES. REMOVE YOUR CLOTHES IF FUEL TOUCHES THEM. RINSE YOUR SKIN FULLY WITH WATER WHERE THE FUEL TOUCHED YOU. FUEL CAN BURN YOUR SKIN.
 (a)  Disassemble the connection.
 NOTE: The hoses can have oil or fuel in them as they are
____ removed. Drain the fluid into a container.
 (b)  
Install the protective covers and caps on all drilled passages, fuel lines, air lines, and open engine ports when the parts are removed.

 (c)  
If it is necessary, remove and discard the O-rings.

 (d)  
Remove and do an inspection of the gaskets or seals, if it is necessary (AMM 70-30-01/201).

 (e)  
Do an inspection of the mating and threaded surfaces for cleanliness, contamination, scratches, dents or other surface defects.

 (f)  
Do an inspection of the hose for satisfactory general condition and to make sure no damage has occurred.

 (g)  
Remove the protective covers and caps immediately before the installation.

 (h)  
Lubricate the new O-rings with lubricant, VV-P-236.

 (i)  
Apply a thin layer of oil, CFMI SB 79-001, to the gaskets and seals.

 (j)  
Install the new O-rings, serviceable gaskets or seals as necessary.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(k)  
Do not bend or try to make the preformed hoses straight.

 (l)  
Tighten all end fittings and clamps with your hand.

 1)  After a system is installed, torque the clamps first, then torque the end fittings.

 (m)  
Do not chafe the hoses when you install the clamps.

 1)  Attach the tube loosely with a clamp and adjust the hose to get the best clearance, then tighten the clamps.

 (n)  
Use the correct size clamp for the hose you install. 1) A clamp that is too large will cause chafing. 2) A clamp that is too small will cause the hose diameter to

 be decreased and can cause blockage.

 (o)  
Make sure there is clearance between the hose and each adjacent part.

 (p)  
All coupling nuts must turn freely with your hand.
　
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