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Old 08-16-2020, 02:17 AM   #21
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I had one fabricated by CW Mill ... basically, they manufacture an air conditioner compressor bracket for our CAT 3126 engine so it was easy to make it fit the alternator once I provided the dimentional diagram for the alternator I was planning to use.


Note: It was a kit that included the bracket, an idler pulley, nuts and bolts, and a serpentine belt.

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Old 08-16-2020, 08:08 AM   #22
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shouldnt a pad mount A/C bracket kit also fit a pad mount alternator? you would just change the belt size and maybe idler size since the alternator has a smaller pulley..



in fact on an ISC i'd get a dual pad mount A/C kit, install a second alternator and then put on a proper A/C compressor for road A/C and have all bases covered..



being on the trip to texas showed me I will never want to be without Good A/C on the road.. now my bus as ive mentioned is completely stock with clear windows.. but wow that 100,000+ BTU of Air conditioning sure came in handy when the sun was blazing, it was an actual termp of 104 and on the open freeways.. the dewpoint was close to 70.. i dont know of any electric A/C that wouldve kept me cool going down the highway like that even in a decently insulated rig..



having a big or 2nd alternator definitely gives you options for all kinds of electrical items while the engine is running.. having both makes you completely set!
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Old 08-16-2020, 10:50 AM   #23
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That’s a big job but yes 100,000 btu of Air con would be nice... what’s a pad mount a/c bracket? I may have to go find one
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Old 08-16-2020, 03:15 PM   #24
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Originally Posted by Bon Voyage View Post
... what’s a pad mount a/c bracket? I may have to go find one

A pad mount bracket (Quad mount or Q-type) is a type of bracket that the compressor or alternator sits on and is bolted down, fixed in position.


The other common type is a side-mount (J-type) in which the compressor or alternator is mounted with one bolt on the pully end of the device on which the device is hung. There is a second bolt that holds the device once it has been pivoted into position, creating tension on the belt. When a separate tension device is used on the belt, this second bolt is not adjustable and simply provides additional support to the mounted device.


The side-mount bracket is common in automotive and diesel applications. The pad mount is *usually* used on bigger/heavier devices.


Top view of quad/pad mount bracket without the alternator:
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Top view with the alternator mounted:
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Side view with the alternator mounted:
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Old 10-21-2020, 09:00 PM   #25
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This is an informative thread as I am doing the same thing. The question that I have is how to interface a 120vac output generator and inverter with a 240vac 50a shore power?
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Old 10-21-2020, 11:43 PM   #26
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You’d have to have a 240 volt breaker box and 240 volt transfer switch. 240 volt is just essentially two 120 volt lines. The way mine is set up is the shore power 50 amp 240 volt goes into one side of the transfer switch (both 120 volt lines plus neutral and ground).

The 120 volt generator is wired into the other side of the transfer switch but to make it compatible to run on the 240 volt transfer switch and breaker box there is a short jumper wire (not sure that’s the correct term) that runs from the first hot wire terminal to the second hot wire terminal. (Now both power branches are energized by the 120 volt generator.

The output from the transfer switch goes into the 2 in 1 inverter/charger unit I have which is 240 volt so it has 2 of the 120 volt hot wire outputs. One for each side of the breaker box.

I’m not sure there is a way to use a 120 volt inverter and a 240 volt breaker box and a 240 volt transfer switch which you’d need if you want to use 50 amp Rv Park power. You might have to get a 240 volt inverter or just use the 30 amp 120 volt Rv service. Maybe somebody else knows better.

If I remember I’ll take a couple pictures tomorrow in the daylight.

Edit: maybe you could keep the 120 volt inverter if you had a transfer switch with 3 inputs (Shore power, generator, inverter) and have the inverter wired to the transfer switch with the jumper wire to the second 120 volt hot wire terminal on the transfer switch input.
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