S 394-043
(4)
Apply Alodine protective coating to the cleaned surfaces of the rear spar.
S 424-018
(5)
Put the heat exchanger through the access panel in the wing.
NOTE: Put the end of the heat exchanger with the inlet and outlet
____
ports in first.
S 424-020
(6)
Put the heat exchanger in its position with the inlet and outlet fittings in the holes in the rear spar.
S 434-016
(7)
Install new O-rings on the hydraulic fittings for the heat exchanger.
NOTE:____Make sure the O-rings are correctly installed. Apply assembly lube or hydraulic fluid to the O- rings and the hydraulic fittings. This will make the installation easier.
S 434-021
(8)
Install one phenolic washer (BACW10P361LA, 0.020 inch thick) at each mounting point of the heat exchanger.
(9)
Install the mounting bolts but do not tighten them.
S 434-022
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737-300/400/500MAINTENANCE MANUAL
S 434-023
(10) At the rear spar, install bulkhead nuts and washers.
(a) Tighten the bulkhead nuts and install lockwire.
S 214-024
(11) Measure the clearance at each mounting point, between the phenolic washer and the heat exchanger. If the clearance is more than 0.010 inch, do these steps:
(a)
Remove the phenolic washer.
(b)
Measure the clearance with no washers in it.
(c)
Install the number of washers shown in the table that follows.
--------------------------------------------------------------------------------| CLEARANCE WITH NO WASHERS - INCHES | TOTAL NUMBER OF WASHERS NECESSARY | -------------------------------------------------------------------------------| | 0.093 - 0.074 | 1 - BACW10P361LA | | | 1 - BACW10P168L | --------------------------------------------------------------------------------| 0.073 - 0.052 | 1 - BACW10P168L | --------------------------------------------------------------------------------| 0.051 - 0.031 | 2 - BACW10P361LA | --------------------------------------------------------------------------------
S 434-025
(12)
When you get the correct clearance at all of the mounting points, tighten the mounting bolts.
S 914-027
(13)
Clean the bonding jumper and its mating surfaces (AMM 20-10-34/701).
(14)
Connect the bonding jumper to the airplane.
S 764-046
(15)
Make sure the resistance of the bonding jumper is less than 5 milliohms (SWPM 20-20-00).
S 914-029
(16)
Make sure the resistance between the rear spar and the hydraulic fitting is less than 1 milliohms (SWPM 20-20-00).
S 434-028
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737-300/400/500MAINTENANCE MANUAL
S 394-026
(17)
Apply a fillet seal of BMS 5-26 on the hydraulic fittings at the rear spar (AMM 51-31-00/201). Apply the seal on the inner side of the fuel tank.
S 944-030
(18)
Make sure you remove all of the tools, unwanted parts, and unwanted objects from the wing fuel tank.
S 414-031
(19)
Install the No. 1 access panel for the wing fuel tank (AMM 28-11-11/401).
S 434-032
(20)
Connect the hydraulic lines to the fittings for the heat exchanger at the rear spar.
S 654-033
(21)
Fill the fuel tank to a minimum of 250 gallons (1675 lbs/760 kg) (AMM 12-11-00/301).
S 794-034
(22)
Make sure the No. 1 access panel, and the bulkhead fittings for the heat exchanger (at the rear spar) do not have leaks of fuel.
S 864-035
(23)
Pressurize the applicable hydraulic reservoir (AMM 29-09-00/201).
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