49-91-11
 ALL  ú ú 01 Page 407 ú Jul 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
OIL PUMP - ADJUSTMENT/TEST
__________________________
 1.  General_______
 A.  This procedure contains the task to do the oil pump test. You must do the oil pump test if the oil pump was disassembled or replaced, or if the oil pressure switch was replaced.
 TASK 49-91-11-715-001
 2.  Oil Pump Test (Fig. 501)_____________
 A.  Standard Tools and Equipment
 (1)  Pressure gage - 0 to 200 psig and appropriate fittings
 B.  References
 (1)  AMM 49-11-00/201, APU Power Plant
 C.  Access
 (1)  
Location Zones
 101 Control Cabin, LH
 205 Electronic Compartment
 703 APU Compartment

 (2)  
Access Panels
 1201 Electronic Equipment Access Door
 3804 APU Cowl Door

 D.  Procedure
 S 865-011
 (1)  
Set the APU master switch on the P5 forward overhead panel to the OFF position and attach a DO-NOT-OPERATE tag.

 S 015-003

 (2)  
Open the APU cowl door:

 (a)  
Open the latches for the APU cowl door.

 (b)  
Open the APU cowl door.

 (c)  
Connect the door support rods.

 S 015-009
 CAUTION:_______BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
 (3)  Remove the lower shroud:
 (a) Hold the lower shroud and open the shroud latches.
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 49-91-11
 ALL  ú ú 01 Page 501 ú Mar 15/92
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
FWD
PRESSUREREGULATOR VALVE
OIL PUMP
LOCKNUT 
FWD 
ADJUSTMENT  TEST GAGE 
STARTER  SCREW  CONNECTION 
MOTOR  (OIL PRESSURE 
MANIFOLD) 
Oil Pump Adjustment 
Figure 501 

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 49-91-11
 ALL  ú ú 01 Page 502 ú Nov 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(b)  Remove the lower shroud.
 S 715-005
 (4)  Test the oil pump:
 (a)  
Remove the cap from the end of the oil pressure manifold.

 (b)  
Attach a flexible oil line with an oil pressure gage to the manifold.

 (c)  
Remove the DO-NOT-OPERATE tag from the APU master switch on the P5 forward overhead panel.

 (d)  
Start the APU (AMM 49-11-00/201).

 NOTE: Let the APU go to full speed with no load applied.
____
 (e)  Monitor the oil pressure for the oil pump.
 NOTE: The oil pressure will read 95 |5 psig.
____
 (f)  If the oil pressure is not 95 |5 psig, do these steps: 1) Do the APU usual shutdown (AMM 49-11-00/201). 2) Attach a DO-NOT-OPERATE tag to the APU master switch on the
 P5 forward overhead panel.
 3) Loosen the locknut.
 4) If the oil pressure is too low, turn the adjustment screw
 clockwise to increase the oil pressure.
 5) If the oil pressure is too high, turn the adjustment screw
 counterclockwise to decrease the oil pressure.
 6) Tighten the locknut.
 7) Do the test for the oil pump until the oil pressure is
 correct.
 (g)  
If the oil pressure is 95 |5 psig, do the APU usual shutdown (AMM 49-11-00/201).

 (h)  
Attach a DO-NOT-OPERATE tag to the APU master switch on the P5 forward overhead panel.

 (i)  
Remove the flexible air line with the pressure gage from the manifold fitting.

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