12-13-21
 FREQUENCY GENERATOR/CONVERTERS  ú CONFIG 3 ú 02 Page 311 ú Mar 12/01
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A
737-300/400/500MAINTENANCE MANUAL
 APU OIL TANK - SERVICING
________________________
 1.  General_______
 A.  This procedure gives the task to fill the oil tank of the Auxiliary Power Unit (APU). A different procedure (AMM 49-91-31/301) gives the task to change the oil in the oil tank.
 TASK 12-13-31-613-001
 2.  Fill the APU Oil Tank (Fig. 301)_____________________
 A.  Consumable Materials
 (1)  D00071 Aircraft Turbine Engine Oil - MIL-PRF-7808 Type I
 (a)  Brayco 880 Conojet
 (b)  B. P. Turbine Oil 2389
 (c)  Castrol 399
 (d)  Exxon Turbine Oil 2389
 (2) D00635 Aircraft Turbine Engine Oil - Def Stan 91-94, Type I
 (a)  Aeroshell Turbine Oil 390
 (3) D00636 Aircraft Turbine Engine Oil - Def Stan 91-94, Type I
 (a)  Castrol 325
 (4) D00068 Aircraft Turbine Engine Oil - MIL-PRF-23699 Type II
 (a)  Aeroshell Turbine Oil 500
 (b)  Aeroshell Turbine Oil 560
 (c)  B. P. Turbo Oil 2197
 (d)  B. P. Turbo Oil 2380
 (e)  Castrol 5000
 (f)  Exxon or Esso Turbo Oil 2197
 (g)  Exxon or Esso Turbo Oil 2380
 (h)  Hatcol 3611
 (i)  Mobil Jet II
 (j)  Mobil Jet 254
 (k)  Mobil Jet 291
 (l)  Royco Turbine Oil 500
 (m)  Royco Turbine Oil 560
 (n)  Royco 899
 (5)  D00077 Aircraft Turbine Engine Oil - DOD-L-85734 and Def Stan 91-100, Type II
 (a)  Aeroshell Turbine Oil 555
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-13-31
 ALL  ú ú 01 Page 301 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

737-300/400/500
MAINTENANCE MANUAL

SEE A
SEE B
OIL TANK
FILLER CAP 
DRAIN PLUG 
FILLER 
NECK  FWD
A 
OIL TANK 

FWD
B
APU Oil Tank Servicing
Figure 301

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-13-31
 ALL  ú ú 04 Page 302 ú Jul 15/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (6)  D50031 Aircraft Turbine Engine Oil - DOD-L-85734 and
 Def Stan 91-100, Type II

 (a)  Royco 555
 B. 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
 3876 APU Oil Filler Door

 C. Procedure
 S 863-015
 (1)  Set the switch and the circuit breaker:
 (a)  
Set the APU master switch on the P5 forward overhead panel to the OFF position and attach a DO-NOT-OPERATE tag.

 (b)  
Open this circuit breaker and attach a DO-NOT-CLOSE tag: 1) E3-3 Electrical Shelf, APU Control Unit

 S 013-020
 (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 013-013
 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.

 (b)  
Remove the lower shroud.

 S 013-019
 WARNING: DO NOT TOUCH THE COMPONENTS OF THE OIL SYSTEM IF THE APU IS
_______ HOT. THESE COMPONENTS STAY HOTTER THAN OTHER COMPONENTS. HOT COMPONENTS CAN BURN YOU.
 WARNING:_______DO NOT LET HOT OIL GET ON YOU. PUT ON GOGGLES AND PROTECTIVE EQUIPMENT OR LET THE APU BECOME COOL. HOT OIL CAN BURN YOU.
　
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