| Onan won't crank [message #188032] |
Tue, 23 October 2012 01:12  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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I had a GMCer stop by on Sunday and we looked at several things on his coach. One of his complaints was the rear mounted battery (1973 coach) would not crank over the Onan. After checking the battery voltage and the condition of the battery cables we moved to the starter itself.
The appropriate voltage during cranking was not there at the starter even though the battery read 12.6 volts at rest. A few more minutes with the volt meter determined that there was a problem with the positive battery cable.
The positive battery cable feeds through the lower Onan case with a brass bolt and nut with a couple of phenolic washers insulating it from the Onan case. The feed through connection was not making a good connection. We removed the whole feed through thing and disassembled it. After cleaning it and the attaching cables thoroughly we eliminated the problem. While we were there we also cleaned all of the negative terminals.
I mention this here because this is the second coach that I have seen and fixed this failure on.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Onan won't crank [message #188039 is a reply to message #188032] |
Tue, 23 October 2012 07:12  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Thank you. This just went on my Onan List for the rehabbing of the PB.
--johnny
'76 23' transmode Norris
'76 palm beach
From: Ken Burton <n9cv@comcast.net>
To: gmclist@temp.gmcnet.org
Sent: Tuesday, October 23, 2012 2:12 AM
Subject: [GMCnet] Onan won't crank
I had a GMCer stop by on Sunday and we looked at several things on his coach. One of his complaints was the rear mounted battery (1973 coach) would not crank over the Onan. After checking the battery voltage and the condition of the battery cables we moved to the starter itself.
The appropriate voltage during cranking was not there at the starter even though the battery read 12.6 volts at rest. A few more minutes with the volt meter determined that there was a problem with the positive battery cable.
The positive battery cable feeds through the lower Onan case with a brass bolt and nut with a couple of phenolic washers insulating it from the Onan case. The feed through connection was not making a good connection. We removed the whole feed through thing and disassembled it. After cleaning it and the attaching cables thoroughly we eliminated the problem. While we were there we also cleaned all of the negative terminals.
I mention this here because this is the second coach that I have seen and fixed this failure on.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Onan won't crank [message #188047 is a reply to message #188039] |
Tue, 23 October 2012 09:09 |
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WD0AFQ
Messages: 7111
Registered: November 2004
Location: Dexter, Mo.
Karma: 207
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Senior Member |
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Found this same problem on our coach when we bought it back in 04. I think most all of these fail eventually.
Dan
3 In Stainless Exhaust Headers
One Ton All Discs/Reaction Arm
355 FD/Quad Bag/Alum Radiator Manny Tran/New eng.
Holley EFI/10 Tire Air Monitoring System
Solarized Coach/Upgraded Windows
Satelite TV/On Demand Hot Water/3Way Refer
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