73-21-01
 ALL  ú ú C02 Page 435 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(h)  
Connect the drain line.
 1) Tighten the elbow fitting to 135-150 pound-inches
 (15-17 Newton meters).

 2)  Tighten the coupling nut to 135-150 pound-inches (15-17 Newton meters).

 (i)  
Connect the drain line for the main oil/fuel heat exchanger.

 1)  Tighten the coupling nut to 135-150 pound-inches (15-17 Newton meters).

 (j)  
Connect the drain line for the starter case.

 1)  Tighten the coupling nut to 270-300 pound-inches (30.5-33.9 Newton meters).

 (k)  
Install the clamp block for the drain line below the MEC.
 1) Tighten the other clamp blocks downstream of the MEC.

 (l)  
Install the seal gasket on the MEC DISCHARGE port.

 (m)  
Connect the fuel outlet line with the four bolts.

 1)  Tighten the bolts to 55-70 pound-inches
 (6-8 Newton meters).

 S 434-049-C00
 (14) Install the plumbing lines that follow on the aft side of the MEC (Fig. 405):
 (a)  
Install the flexible hose between the VSV HEAD end line and the fitting on the MEC. 1) Tighten the coupling nut at the MEC end to

 450-500 pound-inches (51-56 Newton meters).
 2) Tighten the coupling nut at the line end to
 270-300 pound-inches (30-34 Newton meters).

 (b)  
Install the flexible hose between the VSV ROD end line and the fitting on the MEC. 1) Tighten the coupling nuts to 270-300 pound-inches

 (30-34 Newton meters).

 (c)  
ENGINES WITH THE HPTCC TIMER;
 Connect the flexible hose from the PC line to the fitting on
 the MEC.
 1) Tighten the coupling nut to 135-150 pound-inches

 (15-17 Newton meters).
 CAUTION: MAKE SURE YOU DO NOT MIX THE INSTALLATION OF THE P6 LINE
_______
 WITH THE PCR LINE (FIGS. 405 AND 407). THIS WILL CAUSE
 THE INCORRECT OPERATION OF THE MEC.

 (d)  
Connect the P6 line to the fitting on the MEC.
 1) Tighten the coupling nut to 270-300 pound-inches
 (30-34 Newton meters).

 2)  Tighten the in-line coupling nuts to 135-150 pound-inches (15-17 Newton meters).

 (e)  
Connect the PB line to the fitting on the MEC.
 1) Tighten the coupling nut to 270-300 pound-inches
 (30-34 Newton meters).

 2)  Tighten the in-line coupling nuts to 135-150 pound-inches (15-17 Newton meters).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 73-21-01
 ALL  ú ú C03 Page 436 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(f)  
Connect the PCR line to the fitting on the MEC.

 1)  Tighten the coupling nut to 135-150 pound-inches (15-17 Newton meters).

 (g)  
Connect the end of the flexible hose with the elbow to the VBV CLOSE fitting on the MEC. 1) Tighten the coupling nuts to 270-300 pound-inches (30-40

 Newton meters).

 (h)  
Connect the other end of the flexible hose to the VBV CLOSE line. 1) Tighten the coupling nuts to 270-300 pound-inches

 (30-34 Newton meters).

 (i)  
Connect the end of the flexible hose with the elbow to the VBV OPEN fitting on the MEC. 1) Tighten the elbow to 450-500 pound-inches

 (51-56 Newton meters).

 (j)  
Connect the other end of the flexible hose to the VBV OPEN line. 1) Tighten the hose end to 270-300 pound-inches

 (30-34 Newton meters).

 (k)  
Connect the CDP line to the fitting on the MEC. 1) Tighten the coupling nut to 270-300 pound-inches
　
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