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757 MAINTENANCE MANUAL
 DRAIN PIPE HEATER GASKET - REMOVAL/INSTALLATION
_______________________________________________
 1.  General
_______
 A.  This procedure contains two tasks. The first task is the removal of the drain pipe heater gasket. The second task is the installation of the drain pipe heater gasket.
 B.  Drain pipe heater gaskets prevent ice on the drain pipes. The heater gaskets are around the drain pipe below the drain cap. Access is through the applicable drain service door.
 TASK 30-71-04-004-001
 2.  Remove the Drain Pipe Heater Gasket (Fig. 401)
___________________________________
 A.  References
 (1)  AMM 38-32-16/401, Waste Tank Drain Duct Nipple
 B.  Procedure
 S 034-002
 (1)  
Remove the drain duct nipple assembly (AMM 38-32-16/401).

 S 034-003

 (2)  
Cut the lead wires near the heater gasket.

 NOTE: You can keep the lead wires in position to help you find the
____ location of the splice. Remove the wires before you install the new heater gasket.
 S 024-004
 (3)  
Remove the heater gasket and the shim.

 S 214-005

 (4)  
Examine the shim.

 (a) Replace the shim, if necessary (AMM 38-32-16/401).
 TASK 30-71-04-404-006
 3.  Install the Drain Pipe Heater Gasket (Fig. 401)
____________________________________
 A.  Consumable Materials
 (1)  
A00247 Sealant, Chromate Type - BMS 5-95

 (2)  
G00286 Agent, Parting - 4A-183

 (3)  
B00148 Solvent - Methyl Ethyl Ketone
 (MEK)-TT-M-261

 (4)  
B00299 Abrasive - Scotch-Brite type A, 100-grit
 or finer

 (5)  
G00033 Cheesecloth - BMS 15-5

 B.  References
 (1)  AMM 24-22-00/201, Electrical Power - Control
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757
MAINTENANCE MANUAL

Figure 401
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757 MAINTENANCE MANUAL
　
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