TM 9--2350--292--20--20618 00--5AUXILIARY POWER UNIT MUFFLER AND EXHAUST SYSTEMREPLACEMENT -- CONTINUED0618 00InstallationNOTEFor ONAN APU, if elbow is being installed and APU cov-er has not been removed, remove APU cover(WP 0413 00) and proceed to step 1. If elbow is alreadyinstalled and APU cover has not been removed, it is notnecessary to remove APU cover to complete installationprocedures. In this case, proceed to step 7.For HATZ APU, if elbow and stub assembly are beinginstalled and APU cover has not been removed, removeAPU cover (WP 0413 00) and proceed to step 4. If elbowand stub assembly are already installed and APU coverhas not been removed, it is not necessary to remove APUcover to complete installation procedures. In this case,proceed to step 7.1. Apply sealing compound to threads of elbow (23).2. Install elbow (23) in APU engine exhaust manifold.3. Install APU cover (WP 0413 00).23
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