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Old 04-10-2015, 06:36 PM   #1
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In Need of Power Tech 6.6 Gen Schematics

I have a 94 Magna with a Power Tech 6.6 gen set and have no schematics for it. If anyone has any schematics or knowledge of starting and switch issues I would appreciate any help or direction. Recently had charge issues with coach batteries and replaced them and then found the generator to not do anything using either switch. I replaced the battery for it with new and still nothing, not having any schematics or drawings I don't know what relays or anything that could prevent it from starting. Prior to this I had no issues running it or starting. Thanks in advance to anyone that could assist.
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Old 04-11-2015, 04:41 AM   #2
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Relay

The relay may have a fuse in the panel or there maybe a stuck breaker for the genset , if you call CC they can tell you if there a fuse and probably have the schematic .

Good luck .




Randy.
2005 CC Magna Rembrandt
Eau Claire wi
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Old 04-11-2015, 12:05 PM   #3
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I have found the Cust Svc at Power tech to be helpful.

http://http://www.powertechgenerators.com/

If you down load a manual for a newer 7.0 generator, you find trouble shooting steps for the Kubota engine and the Power Generation system.

Those steps have saved my bacon several times.

If you measure 12v at the back of the on-board switch then your problem could be either with the engine or the power generation system.

If no 12v at back of switch you could have a broken wire or failed fuse leading to the switch.

The engine will shut down, or not start, if the shut down solenoid is not working, if fuel in the tank is below 25% full, if the oil is low, if the coolant is low.

I seem to remember that the engine will start but not run when the power generation system is the problem.

There are three relays behind the switch. Buy a new one and switch it among the three to see if replacement helps. I fixed my 7.0 in that manner one time.

I also had my 20 yr old starter motor lock up once.

Also had the power generation system problem, but had it fixed by a generator shop for about $300.
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Old 04-11-2015, 02:44 PM   #4
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aghenry

Dean, Thanks for the info, my 6.6 is on the slide out in the front of the coach, is your 7.0 the same or is it on the side? Without any schematics or drawings for the system I don't know where the relays or fuses are located or how they effect each other. I knew about the low oil and fuel taking away the ground I didn't know however the coolant could do the same. I am retired Army (Vietnam vet) and have worked on Heavy military MRAP and wheeled vehicles for 20 plus years after that but don't know beans about this system! I see your responses all throughout this forum so I am learning from you and others. Thanks for your assistance in whatever form.
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Old 04-11-2015, 03:17 PM   #5
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aghenry,

I got to walk the in jungle for several months. So a fellow Vietnam Vet.

As I said, go to the PT website and download a manual.

I suspect the info will apply to your 6.6 as it did to my 7.0L. The trouble shooting steps give you a logical way to analyze the problem.

Yes, my PT is on a slide in the nose of the rig.

Take the cover off the box that contains the switch to access relays and fuses.


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Old 04-11-2015, 06:05 PM   #6
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Try PDF Page 20 of this manual (it will be labeled page 9 in the content).

http://cdn.shopify.com/s/files/1/006..._MANUAL.pdf?78
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Old 04-12-2015, 02:12 PM   #7
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Relays are mounted behind the start switch.

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