S 485-012

 (7)
Connect the electrical connectors to the temperature switches.

 S 865-027

 (8)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  P6-2 Panel
 1) ELEC HYD PUMP CONTROL (for system B)
 2) ELEC HYD PUMP CONTROL (for system A)

 H. Case Drain Overheat Switch Test
 S 035-013
 CAUTION: DO NOT REMOVE OR INSTALL THE OVERHEAT SWITCHES WITH THE
_______ ELECTRICAL CONNECTORS ATTACHED TO THE SWITCH. YOU CAN CAUSE DAMAGE TO THE SWITCH OR THE CONNECTOR.
 (1)  
Disconnect the electrical connectors from the overheat switches in the case drain lines from the EMDPs.

 S 025-014

 (2)  
Remove the overheat switches from the case drain lines
 (AMM 29-32-12/401).

 (a)  Put plugs in the case drain line.

 (3)  
Connect the electrical connectors to the overheat switches.

 S 865-016

 (4)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 S 435-018
 (a)  P6-3 Panel
 1) INDICATOR MASTER DIM BUS SECT 5 2) INDICATOR MASTER DIM BUS SECT 6
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A
737-300/400/500MAINTENANCE MANUAL
 S 735-017
 (5)  Slowly increase the temperature of the two overheat switches to 215
 - 235-F at a rate of 5 degrees per minute (| 1 degree per minute).
 NOTE: Use a Tempcal thermal switch testor or equivalent to supply____
 the heat.
 (a) Make sure the OVERHEAT lights (ELEC 1 and ELEC 2) come on.
 S 735-019
 (6)  Slowly decrease the temperature of the two overheat switches to
 165-185-F at a rate of 5 degrees per minute (| 1 degree per minute).
 (a) Make sure the OVERHEAT lights (ELEC 1 and ELEC 2) go off.
 S 865-020
 (7)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a) P6-3 Panel
 1) INDICATOR MASTER DIM BUS SECT 5
 2) INDICATOR MASTER DIM BUS SECT 6
 S 035-021
 (8)  Disconnect the electrical connectors from the overheat switches.
 S 425-022
 (9)  Install the overheat switch in the case drain line
 (AMM 29-32-12/401).
 S 435-023

 (10)
 Connect the electrical connectors to the overheat switches.

 S 865-024

 (11)
 Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a) P6-3 Panel
 1) INDICATOR MASTER DIM BUS SECT 5 2) INDICATOR MASTER DIM BUS SECT 6
 S 865-025
 (12) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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737-300/400/500MAINTENANCE MANUAL
 HYDRAULIC FLUID OVERHEAT WARNING SWITCH - REMOVAL/INSTALLATION
______________________________________________________________
 1.  General
_______
 A.  There are two tasks in this procedure. There is a task for the removal and a task for the installation of the hydraulic fluid overheat warning switch.
 B.  The overheat switches are installed in systems A and B EMDP case drain lines. You can find these overheat switches directly below the pump, on the forward wheel well bulkhead.
 TASK 29-32-12-004-001
 2.  Hydraulic Fluid Overheat Warning Switch Removal (Fig. 401)
_______________________________________________
 A.  References
 (1)  29-09-00/201, Hydraulic Reservoir Pressurization System
 B.  Access
 (1)  Location Zone
 216 Main Wheel Well, LH
 217 Main Wheel Well, RH
　
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