(9)
Install filler neck on oil tank filler port. Attach filler neck to filler port with bolt, washer and nut.
(10)
Fill oil tank with new oil to 6-quart mark on dipstick (Fig. 301).
WARNING: PROLONGED CONTACT OF LUBRICATING OIL WITH SKIN CAN CAUSE DERMATITIS, STAIN CLOTHING AND SOFTEN PAINT. REMOVE SATURATED CLOTHING IMMEDIATELY AND THOROUGHLY WASH SKIN AFTER CONTACT. PAINTED SURFACES SHOULD BE CLEANED IMMEDIATELY AFTER CONTACT WITH OIL.
CAUTION: SOME OILS ARE NOT COMPATIBLE WHEN MIXED. UNLESS COMPATIBILITY IS ASSURED, DO NOT MIX BRAND NAME OR TYPES OF OILS.
(11) Install filler cap in oil tank filler port.
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May 01/74 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 49-91-31 Page 303
B. Change lubricating oil using another approved brand or type.
NOTE: Drain oil while engine is still hot from operation. If necessary, start and operate engine until oil reaches normal operating temperature, then shut down engine and proceed with oil change while oil is hot.
(1)
Remove oil tank filler cap and dipstick.
(2)
Remove bolt, washer and nut attaching filler neck to bracket on oil tank filler port.
(3)
Remove filler neck from oil tank filler port.
(4)
Place container under oil tank drain port. Remove drain plug while oil is still warm, and allow oil to drain.
WARNING: PROLONGED CONTACT OF LUBRICATING OIL WITH SKIN CAN CAUSE DERMATITIS, STAIN CLOTHING AND SOFTEN PAINT. REMOVE SATURATED CLOTHING IMMEDIATELY AND THOROUGHLY WASH SKIN AFTER CONTACT. PAINTED SURFACES SHOULD BE CLEANED IMMEDIATELY AFTER CONTACT WITH OIL.
(5)
Remove screen from oil tank filler port, wash in solvent, and dry with clean compressed air.
WARNING: SOLVENT IS TOXIC. USE IN WELL VENTILATED AREA. KEEP AWAY FROM FLAME.
(6)
Remove and discard oil filter element (Ref 49-91-11).
(7)
Disconnect and drain oil from cooler and all associated oil lines. Reconnect lines.
(8)
Install new oil filter element (Ref 49-91-11).
(9)
Install drain plug with new packing.
(10)
Install screen in oil tank filler port.
(11)
Examine O-ring seals on filler cap and filler neck and replace if damaged.
(12)
Install filler neck on oil tank filler port. Attach filler neck to filler port with bolt, washer and nut.
(13)
Fill the oil tank to the 6 quart mark on the dipstick with an approved oil of a different brand than previously used (Fig. 301).
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WARNING: PROLONGED CONTACT OF LUBRICATING OIL WITH SKIN CAN CAUSE DERMATITIS, STAIN CLOTHING AND SOFTEN PAINT. REMOVE SATURATED CLOTHING IMMEDIATELY AND THOROUGHLY WASH SKIN AFTER CONTACT. PAINTED SURFACES SHOULD BE CLEANED IMMEDIATELY AFTER CONTACT WITH OIL.
CAUTION: SOME OILS ARE NOT COMPATIBLE WHEN MIXED. UNLESS COMPATIBILITY IS ASSURED, DO NOT MIX BRAND NAME OR TYPES OF OILS.
(14)
Install the oil tank filler cap and dipstick.
(15)
Motor the APU for 30 seconds to fill the oil pump, if it is necessary (Ref 49-11-00 MP).
(16)
Operate the APU at the service speed with no load for 3 to 5 minutes (Ref 49-11-00 MP).
(17)
Position the BATTERY SWITCH and APU START SWITCH to OFF and placard that APU maintenance is “in work.”
(18)
Open the circuit breaker on M280 module-APU accessory unit on E3-3 electronic shelf.
(19)
Repeat steps B.(1) thru B.(4), B.(6) thru B.(9) and B.(12) thru B.(14).
(20)
Operate the APU for approximately 5 minutes (Ref 49-11-00 MP).
(21)
Add oil, as necessary, to bring the oil level to the 6 quart mark on the dipstick.
4. Restore Airplane to Normal Configuration
A. Position lower shroud against upper shroud and close shroud latches.
CAUTION: MAINTAIN A MINIMUM CLEARANCE OF 0.18 INCH BETWEEN ENGINE PLUMBING, FIRE DETECTOR, CLAMPS AND INSIDE SURFACE OF LOWER SHROUD.
EXERCISE EXTREME CARE NOT TO DAMAGE SHROUD DRAIN LINES WHEN HANDLING SHROUD.
B. Disengage APU compartment access door support rods and stow rods. Close and latch access door.
C. Close the circuit breaker on M280 module-APU accessory unit on E3-3 electronic shelf.
D. Position BATTERY SWITCH to ON and remove placards.
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OIL TANK - REMOVAL/INSTALLATION
1. General
A. This section covers the removal/installation of the APU oil tank and oil level switch as a unit. For removal of oil level switch, refer to 49-94-ll. Access to the oil tank is gained simply by removing the lower shroud, but due to space limitations, removal of the oil tank is simplified if the APU power plant is first lowered.
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