(Dimensions are in inches)
H. When gap dimensions are within limits, tighten mounting bolts.
I. Apply fillet seal of BMS 5-26 over fittings at rear spar inside tank (Ref 51-31-0).
J. Clean, install, and check bonding strap (Ref 20-10-181, 20-10-185 and 20-22-01). Maximum resistance is 5 milliohms.
K. Inspect fuel tank to be certain all parts, tools and foreign matter have been removed.
L. Install fuel tank access panel No. 1 (Ref 28-10-0 MP, Purging and Entry).
M. Install and tighten tubing connection to heat exchanger at rear spar.
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N. Fill fuel tank to a minimum of 250 gallons (1700 lbs/775 kg) (Ref 12-11-0).
O. Check fuel tank access panel No. 1 and heat exchanger bulkhead fittings at rear spar for fuel leaks.
P. Pressurize hydraulic reservoir (Ref 29-15-300 MP).
Q. Check flap handle remains in DOWN position and position system B ELEC pump switch (P5) to ON.
R. Check tubing-to-heat exchanger at rear spar for hydraulic leaks.
S. Position flap handle to FLAP UP.
T. Position Sys B ELEC switch to OFF when flaps are up.
U. Service applicable hydraulic system reservoir (Ref 12-12-00).
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SYSTEM B HYDRAULIC PUMP ACOUSTIC FILTER - REMOVAL/INSTALLATION
1. General
A. A container will be necessary to catch fluid from the disconnected hydraulic lines. Take precaution to prevent spillage of fluid. Should any fluid spill on the airplane, decontaminate. Refer to Chapter 12, Cleaning and Washing.
B. The following procedure may be used for either the left or right acoustic filter.
2. Remove Acoustic Filter (Fig. 401)
A. Open system B pump circuit breakers on P6-11 and P6-12 panels.
B. Depressurize hydraulic reservoirs. Refer to 29-09-300, Hydraulic Reservoir Pressurization System - MP.
C. Remove mounting clamp.
D. Disconnect line from filter.
E. Remove filter from pump.
3. Check Filter for Metal Particle Contamination (Optional) (Fig 401.)
A. Use the wrenching flats on the barrel and head then disassemble the filter.
B. Remove and discard O-ring packings and teflon backing rings.
C. Flush all surfaces using degreaser BMS 11-7, or equivalent.
D. Examine all surfaces, the O-ring grooves and threads for defects or contamination.
E. Install new O-ring packings and backing rings.
F. Apply lubricant to the threads on head then assemble the unit.
G. Tighten the head to 40 pound-feet.
H. Apply sealant, Dow Corning 30-121, or equivalent to the barrel and head joint.
I. Install lockwire to secure the head to the barrel.
J. If the filter contained metal particles, accomplish the following:
(1)
Replace the pump. Refer to 29-12-21, System B Electric Motor-Driven Hydraulic Pump - R/I.
(2)
Flush the hydraulic line between the pressure filter and the pump.
(3)
Check the pressure filter for metal particles. Refer to 29-12-0, Hydraulic System B – I/C.
4. Install Acoustic Filter (Fig. 401)
A. Install acoustic filter on hydraulic pump.
B. Install mounting clamp.
C. Connect line to filter.
D. Close system B pump circuit breakers on P6-11 and P6-12 panels.
E. Pressurize hydraulic system B using applicable pump. Refer to 29-12-0, Hydraulic System B - MP.
F. Check connections for leaks.
May 01/99 29-12-101 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
F87660 K16828
System B Hydraulic Pump Acoustic Filter Installation 500
29-12-101 Figure 401 (Sheet 1) May 01/99
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