(b)  
Close the shroud latches.

 S 414-010
 (4)  Close the APU cowl door:
 (a)  
Disconnect the door support rods.

 (b)  
Put the door support rods in the clips on the APU cowl door.

 (c)  
Close the APU cowl door.

 (d)  
Close the latches for the APU cowl door.

 S 864-011
 (5)  Set the circuit breaker and the switch:
 (a)  Remove the DO-NOT-CLOSE tag and close this circuit breaker: 1) E3-3 Electrical Shelf, APU Control Unit
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(b) Remove the DO-NOT-OPERATE tag from the APU master switch on the P5 forward overhead panel.
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APU CONTROL THERMOSTAT - ADJUSTMENT/TEST
________________________________________
 1.  General
_______
 A.  This procedure contains an adjustment task for the APU control thermostat. The adjustment nut for the thermostat has a different thread pitch on each end. This thread difference in the nut gives the in or the out movement of the valve assembly. Each 360° turn of the nut moves the valve assembly in or out by the difference between the two thread pitches.
 B.  After the installation of the control thermostat, you must operate the APU with the two air conditioning packs. During the APU operation, monitor the EGT and the pressure for the bleed air duct. If the EGT is not 620°C-649°C, you must adjust the thermostat.
 TASK 49-52-32-825-001
 2.  APU Control Thermostat Adjustment (Fig. 501)
_________________________________
 A.  Special Tools and Equipment
 (1)  
290417-2-1 Kit - Thermostat Calibration, AlliedSignal, Inc., Airline Services Division, P.O. Box 52170, Phoenix, AZ 85072-2170

 (2)  
833657-1 Kit - Thermostat Calibration, AlliedSignal, Inc., Airline Services Division, P.O. Box 52170, Phoenix, AZ 85072-2170 (this is an alternative to the thermostat calibration kit 290417-2-1)

 (3)  
834698-1 Kit - Thermostat Calibration, Griffith Enterprises, 300 East Cherry, Cottonwood, AZ 86326 (this is an alternative to the thermostat calibration kit 290417-2-1)

 B.  References
 (1)  
AMM 49-11-00/201, APU Power Plant

 (2)  
AMM 49-71-21/401, Exhaust Gas Temperature Thermocouple Probe

 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 865-002
 (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.
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE B
SEE A
PROBE THERMOCOUPLE EGT  A
TURBINE EXHAUST PORT  PNEUMATIC THERMOSTAT 
PORT FLANGE EXHAUST 
BOLTS  TEST CABLE ASSEMBLY 
THERMOCOUPLE LEADS TEST CABLE ASSEMBLY  NEEDLE VALVE (NOT USED)  THERMOSTAT CALIBRATION KIT (P/N 290417-2-1) 
　
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