(a)
Turn adjusting screw clockwise to increase oil pressure.
(b)
Turn adjusting screw counterclockwise to decrease outlet pressure.
(2)
Tighten locknut and repeat steps C thru E.
F. If pressure is within specified limits, shutdown engine.
G. Remove flexible air line with pressure gage from manifold fitting and reinstall cap.
501
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G02114
Oil Pump Adjustment 501
49-91-11 Figure 501 Feb 20/86
Page 502
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OIL PUMP - INSPECTION/CHECK
1. General
A. Visually check filter element for metal particles and other foreign material which may indicate internal engine damage. If metal particles are indicated, change oil and oil filter element; then operate the APU for a minimum of fifteen minutes. If no further accumulation of metal particles after fifteen minutes, APU is acceptable for continued service. Further accumulation of metal particles during the fifteen minute run is unacceptable.
501
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OIL TANK - UNIT SERVICING
1. Equipment and Materials
A. Cleaning Solvent - Federal Specification P-D-680 (Ref 20-30-31)
B. Lubricating Oil (MIL -L-7808, MIL-L-23699, Ref 20-30-21).
(1) For additional information refer to P&WA Specification No. 521 (Service Bulletin No. 238), or Garrett (AiResearch) Report GT7800R.
C. Container with 2-gallon capacity
2. Prepare for Oil Tank Servicing
A. Position BATTERY SWITCH and APU START SWITCH to OFF and placard that APU maintenance is "in work."
B. Open the circuit breaker on M280 module-APU accessory unit on E3-3 electronic shelf.
C. Open APU compartment access door latches and open access door. Instal1 door support rods.
D. Support lower shroud, open shroud latches, and remove shroud.
CAUTION: EXERCISE EXTREME CARE NOT TO DAMAGE SHROUD DRAIN LINES WHEN HANDLING SHROUD.
3. Service Oil Tank - Oil Change
CAUTION: ANY SUBSTITUTION OR USE OF NON-APPROVED LUBRICANTS, OR MIXING OF BRANDS OR TYPES OF LUBRICANTS MAY CAUSE CONSIDERABLE ENGINE DAMAGE.
A. Change lubricating oil using same brand or type.
NOTE: Drain oil while engine is still warm from operation. If necessary, start and operate engine until oil reads 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.
501
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G02119
Oil Tank-Unit Servicing 514
49-91-31 Figure 301 Feb 15/73
Page 302
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(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)
Install drain plug with new packing.
(7)
Install screen in oil tank filler port.
(8)
Examine O-ring seals on filler cap and filler neck and replace if damaged.
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