4-19. WINTERIZATION SYSTEM.
4-19 1 Winterization Exhaust System.
This task covers
Tool Kit, Master Mechanic,
Main Engine Shutdown (see para. 2-10)
APU Shutdown (see para. 2-12)
Batteries Disconnected (see para. 4-24.12)
89711-K Tubing Flexible
89556-K Flatband Clamp
Exhaust parts may cause severe burns if touched while hot. Exhaust system must be cool
before working on system.
The following procedures can be used to replace either the APU or the winterization heater
Remove clamp nuts. If nuts are corroded cut band with hacksaw.
Remove exhaust tubing.
Inspect tubing and clamps for corrosion.
Check tubing for excessive dents or separation.
Replace parts as required.
Install pre-cut tubing on winterization heater exhaust outlet or on APU exhaust outlet.
Install new clamps and nuts.
Tighten clamp nuts to 30 ft lb (41 Nm).