CAUTION: DO NOT SHRINK THE TEFLON SLEEVE WITH HEAT. HEAT CAN CAUSE DAMAGE TO THE INSULATION ON THE WIRE.
(a)
Use the electrical cable to push the lacing tape through the larger Teflon sleeve.
(b)
Remove the electrical cable from the larger Teflon sleeve (keep the lacing tape in the sleeve).
(c)
Put the electrical cable through the smaller Teflon sleeve.
(d)
Make a crease (about one foot or 30 cm long) at the end of the smaller Teflon sleeve down to a smaller diameter (where the crease was made) so it will fit easily in the larger Teflon sleeve.
(e)
Tie one end of the lacing tape to the creased end of the smaller Teflon sleeve.
1) Use the knot shown in SWPM 20-10-11 for "Assembly of Wire Harness for High Vibration Areas" (Figure 9).
(f)
Tie the other end of the lacing tape to a stationary object.
(g)
Pull and push the larger Teflon sleeve over the smaller Teflon sleeve.
1) Regularly smooth the larger Teflon sleeve down the length of the smaller Teflon sleeve to prevent bunching.
(7)
Replace the elbow and grommet if they have damage.
NOTE: Refer to SB 737-28-1120 for part substitution data.
(8)
Connect the string back to the wiring and the sleeve.
(a) Put tape (as necessary) on the end of the wiring and socket contacts so the wiring will move smoothly through the conduit.
NOTE: If installing a case ground wire in addition to the three conductor cable, then pull the three conductor cable into the conduit before you pull the ground wire in the conduit.
(9)
Put the tape on the entrance of the conduit at the front spar.
(a) This will protect the wiring from the sharp edge of the electrical conduit.
(10)
Carefully pull the wiring and sleeve through the conduit with the string.
NOTE: The only lubricants permitted for Teflon sleeving are the following: talcum powder, Cetyl Alcohol (Boelube), and TFE Release Agent Dry Lubricant. No other substances are permitted on the wiring or the sleeving.
(11)
Install the socket contacts in the electrical connector (at the fuel boost pump end of the wires).
(12)
Attach the elbow to the fitting on the front spar.
(13)
Install the wiring in the wire clamps.
(a) Make sure the Teflon sleeve is in the first clamp after each end of the conduit.
(14)
If the fuel boost pump was removed to gain access then reinstall it.
(15)
Connect the electrical connector to the fuel boost pump.
NOTE: If using a MS 27557-3 or a MS 27559-3 fitting, then tighten its set screw to hold the fitting in the correct position.
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Sep 01/02
E. Fuel Boost Pump Test
(1)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P6 main power distribution panel:
(a)
BOOST PUMP TANK 1 FWD
(b)
BOOST PUMP TANK 2 FWD
(c)
BOOST PUMP TANK 1 AFT
(d)
BOOST PUMP TANK 2 AFT
(e)
BOOST PUMP CTR TANK LEFT
(f)
BOOST PUMP CTR TANK RIGHT
(2)
Supply the electrical power (AMM 24-22-0/201)
(3)
Do the following steps for each boost pump.
NOTE: Do this test for only one pump at a time. This will ensure the correct wires are connected to each pump.
(a)
Set the switch for the fuel boost pump to ON.
(b)
Make sure the applicable low pressure light goes off.
NOTE: The low pressure lights for the center fuel boost pumps do not come on when the switches of these pumps are in the OFF position. For the center pumps, make sure the low pressure light comes on for a short period and then goes off (when the switch is set in the ON position.
(c)
Set the switch for the fuel boost pump back to OFF.
F. Put the Airplane Back to Its Usual Condition
(1)
Install the access panels for the boost pumps (AMM 57-30-11/401).
(2)
For the forward fuel boost pumps for the No. 1 and 2 tank on airplanes with leading edge flaps covering the fuel boost pump, do these steps:
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