(a)  
The mounting flange of the motor/impeller unit and mating surfaces on the housing.

 (b)  
The bonding clip (9 or 10) and motor/impeller unit (1).

 (c)  
The bonding jumper (8) and the faying surface of the bonding clip (9 or 10) if the bonding jumper electrical connection is to be reworked (View A-A).

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747-400
MAINTENANCE MANUAL

 (d)  Apply Alodine 600 to bare metal areas to prevent corrosion and degradation of the bond.
 (2)  S 434-021Install the new packings (2, 3, and 4), lubricated with petrolatum grease, into the grooves on the motor/impeller unit (1).
 (3)  S 434-022Install the new packing, lubricated with petrolatum, on the drain plug and install plug in the motor/impeller unit (1).
 (4)  S 434-045Install the drain plug in the motor/impeller unit (1).
 (5)  S 434-046Install lockwire on the drain plug (9).
 (6)  S 614-023Put 1/2 to 1 pint of fuel into two smaller slots in the top side of the motor/impeller unit (1).
 (7)  S 614-047Turn the impeller to help the internal parts of the boost pump get wet.
 S 424-048

 CAUTION: BE CAREFUL WHEN YOU INSTALL OR TURN THE MOTOR/IMPELLER UNIT IN
_______ THE HOUSING. IF YOU ARE NOT CAREFUL, DAMAGE TO THE PACKING COULD OCCUR.
 (8)  
Put the motor/impeller unit (1) in the housing.

 S 824-054

 (9)  
Turn the motor/impeller unit (1) until the index hole aligns with the index pin in the housing.

 S 434-025

 (10)
 Install the bonding clip (9) on the motor/impeller unit (1), with two screws (5) (View B). For bonding clip (10), use three screws (5).

 NOTE: Do not tighten the screws (5) at this time.
____
 S 434-026
 (11) Install the remaining screws (5) and washers (6).
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747-400 MAINTENANCE MANUAL
 S 434-055
 (12)
 Tighten all the screws (5) to 17-19 pound-inches.

 S 034-149

 (13)
 Install the lockwire on the socket head screws (5) (View B).

 S 034-151

 (14)
 If the bonding jumper (8) electrical bond to the bonding clip (9, or 10) was reworked, do these steps:

 (a)
Install the bonding jumper (8), washers (12), bolt (11) and nut (13) to the bonding clip (9 or 10) (SWPM 20-20-00).

 S 374-150
 (15)
 Apply these finishes to any cleaned areas of the bonding clip (9 or 10) that are not covered by the jumper terminal:

 (a)
Alodine 600 (AMM 51-21-04/701)

 (b)
BMS 10-20 Type II primer (AMM 28-11-00/801).

 S 434-028
 (16) Connect the electrical connector to the motor/impeller unit (1).
 NOTE: Refer to this table for the equipment numbers.
____
 ~................................................................. | | Equipment Number | | Location ............................ | | Motor | Connector | ................................................................... | No. 1 Main Tank - Fwd | M28 | DM28 | | No. 1 Main Tank - Aft | M22 | DM22 | | No. 2 Main Tank - Fwd | M29 | DM29 | | No. 2 Main Tank - Aft | M23 | DM23 | | No. 3 Main Tank - Fwd | M26 | DM26 | | No. 3 Main Tank - Aft | M31 | DM31 | | No. 4 Main Tank - Fwd | M27 | DM27 | | No. 4 Main Tank - Aft | M32 | DM32 | 2......................................…...........…..............1
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