Alpha Technologies CE-G Series - Manual (Page 31)

4. Operation
4-6
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4.4.1 Accessing the APU, continued
3. Use a 10mm socket and ratchet remove the two flange bolts
that connect the flex exhaust pipe to the upper exhaust pipe.
4. Disconnect fuel hose at the APU 45° fitting. Cut cable ties from hose.
4.4 Converting APU From Natural Gas To Propane Gas, cont.
Figure 4.9, Exhaust pipe flange bolts
Figure 4.10, Fuel hose fitting