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Electrical Discussion of preventative/corrective maintenance and other technical issues regarding your coach's electrical system.

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  #101  
Old 07-20-2011
WestySKPs's Avatar
WestySKPs WestySKPs is offline
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Hi All,

We have a bench mount Quick Cable crimper, cutter, and stripper available to loan out. Just pay shipping costs, pick them up in Cincy, or borrow the gear while at the GL Rally. Ping us if anyone is interested.

Inspect those cables. Many are rougher than you think. The more folks looking at this part of their bus, the better.

MnM
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Last edited by WestySKPs; 07-20-2011 at 10:07 AM. Reason: Bad wording -too late at night
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  #102  
Old 07-31-2011
Donn B Donn B is offline
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Mike, I might want to take you up on shipping the equipment. My cable cutter may not be up to cutting 4/0, and my insullation stripper is a pocket knife. The crimper I have will work.

Now, as I slowly work my way thru this project I'm finding puzzling things. For instance, once the old battery tray was removed and the area cleaned up a bit I discovered this little item mounted under the frame of the compartment under the heatshield. This woulld be on the right side of the engine and behind the battery box. Can someone tell me what it does for a living? In one photo you can see a couple wire terminals are dangling, and they appear to have once gone to this thing. That makes me wonder what it is and why it might have been disconnected.

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Next question deals with what appear to be heavy buss bars. There are 2/0 gauge cables running from these to various places. One appears to go under the coach to either the starter or alternator whie some of the others simply go to the main positive battery terminal lug. There is one buss bar that is single while the other two are bridged. My curiosity is why the one is seperate.

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One last question. Some of the wiring I'm finding has heat shielding, but that is in poor shape. Some of the wiring that does not have the shielding looks llike it should have. One section of 2/0 was melted thru to the conductor. Surprinsingly it didn't seem to have created any problems.

Can anyone offer a resource for new thermal insulating product? I've found some on the web, but if anyone has experience I would appreciate hearing about it.

Thanks!
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1990 WB-40 Royal Conversion
GS 810327023 -- FMCA 421581 -- SKP 109591

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  #103  
Old 07-31-2011
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Don, The first pictures are of some type pressure sensors. Looks like they have been disconnected.

Second pictures are of Shunts. They measure Current flow.
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  #104  
Old 07-31-2011
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Bill Pape Bill Pape is offline
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Don,

the first pics is an oil pressure manifold , the cylinder is the oil pressure gage sensor,
the two wire switch is for the hour meter and the electric fuel pump if your Bird has a lift pump.
If there is a one wire switch it is for low oil pressure alarm,

Shunts are what Rick said, reduces current so the amp gage can read it.
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  #105  
Old 07-31-2011
Donn B Donn B is offline
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Thank you Rick and Bill.

...as my mechanical and electrical ignorance is already on exhibit, allow me to display further.

In theory I now understand the function of the shunts. At the moment all of the cabling running to them is 2/0. I had thought to replace all of the 2/0 in the entire battery compartment with 4/0. Would this be an unnecessary expense for these cables?

Regarding the oil pressure manifold I now have two questions. Would those two dangling connectors belong to the unit, or possibly something else? Secondly, the thing appears to have a small amount of rather fresh oil on it folowing the lick-and-a-promise pressure washing I did several days ago. Is it more likely that the unit is leaking, or something above it, and is such a small leak anything to worry about?
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  #106  
Old 07-31-2011
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Randy Dupree Randy Dupree is offline
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One thing about leaks,they never fix themselfs.
On an important item like an oil sendor i would replace it,i hate leaks and it will get worse before it gets better.
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  #107  
Old 07-31-2011
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Bill Pape Bill Pape is offline
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Quote:
Originally Posted by Randy Dupree View Post
One thing about leaks,they never fix themselfs.
On an important item like an oil sendor i would replace it,i hate leaks and it will get worse before it gets better.

Yep , these leaks need fixed. the two or three sensors are standard parts,
Truck parts store or NAPA.
This is the main engine oil pressure, engines have been fried if these plugs open up and drain the oil.
This is all 12volt wiring, someone may have disconnected a buzzer if it was defective.
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