| [GMCnet] First long trip completed but I have questions..... [message #284331] |
Sat, 08 August 2015 19:30 |
glwgmc
Messages: 1014
Registered: June 2004
Karma:
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Senior Member |
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Hi Chris,
Congrats on a first successful venture, what no doubt will be the first of many to come. Perhaps I can help with your questions.
1) The canister at the passenger side front was designed to capture fuel vapors in the charcoal, then draw them into the intake manifold under high vacuum conditions to burn them instead of venting to atmosphere. Study a vacuum hose diagram to see how all the parts are supposed to work. There is no harm to disable it for the time being while you sort out other things. It has nothing to do with what type of fuel pump you use.
2) The 30 amp breaker on the shore power pole was likely weak or you had some other high draw going on at the same time. Unless both roof AC units are very old they are unlikely to pull 15 amps for more than a few seconds even at startup. Was your coach originally wired for 50 amps (really one 25 amp leg running down both sides of the coach) or 30 amps (all on one leg running down both sides of the coach)? If the power cord going to the shore power pole is 30 amps, all you need is a 30 amp to 50 amp adapter to use the 50 amp plug on the power pole. No need to lug around a heavy, expensive and stiff 50 amp extension cord.
3) The block at the DS rear wheel is a fuel vapor/liquid separator. The output hose goes to the charcoal canister discussed in 1 above. The purpose of that separator is to keep liquid fuel from running to the canister while still allowing fuel vapors to pass around to it. They are little more than a ping pong ball inside a plastic housing. Don’t try to fix it, just replace it with one from one of the GMC suppliers.
4) You already got an answer on the T covers.
5) Black tank smells come from someone trying to clean the tanks or who used a formaldehyde black tank treatment which killed all the necessary bacteria that lives in any septic system to break down waste. Use only an enzyme based or bacteria based black tank treatment. The best we found after four years of full timing and now more than a dozen years of GMCing is called Happy Campers Organic RV Holding Tank Treatment. It is available at Amazon.com or many RV stores. Add it to your black tank as the instructions say and do not rinse out or try to clean your black tank. Once the bacteria colony is reestablished inside your black tank the smells will go away.
5) Old tires, even if they look good, can result in unexpected failures. Plan on replacing them every five or six years. Some use a two tires every other year strategy so the oldest is always just 6 years old.
6) Download and read Dwayne Simmons excellent tutorial on how to keep your Onan running in tip top condition. Do what he says and in the order he suggests. When it is running fine again, install one of Gary Bovee’s electronic ignition kits and you will likely have a reliable Onan for a long time. Do it right once and your life will be much simpler on subsequent trips.
7) There is no need for a gen-set battery. Dump it and start your Onan off of the house chassis batteries. There is a simple wiring mod that is in Dwayne’s tutorial to eliminate the trouble prone gen-set charger from the system. Put on a combiner (a voltage controlled relay) between the house and chassis batteries so both banks charge off of any charging source (alternator, shore power or generator). I like the Blue Sea brand better than the Yandina brand combiner many here favor. It appears to be more robust to me. I have one of each brand on our two coaches and they both work, but I have had two Yandina failures over the years. For other suggestions on modernizing your electrical system, download and read the presentation I have given at various GMC rallies. It is called “Living large in your GMC” and can be downloaded from my web site or GMCWS, or GMC Cascaders as well as others.
Jerry
Jerry & Sharon Work
Kerby, OR
glwork@mac.com
http://jerrywork.com
78 Royale with most everything done to modernize a GMC mechanically
77/94 Clasco bone stock and looks like it just left the Clasco facility
Both drive equally as well.
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Message: 10
Date: Sat, 08 Aug 2015 16:30:08 -0600
From: Christopher Kruger
To: gmclist@list.gmcnet.org
Subject: [GMCnet] First long trip completed but I have questions......
Message-ID:
Content-Type: text/plain; charset="utf-8"
Having just bought my 74 Canyonland in April I spent a little time before the trip finding some of the issue she had that were not found before I
bought it. After totally re-plumbing it with pex, adding an electric fuel pump a couple of new battery trays, roof rails and a tow brake system it
was time to head from TN to TX for a week with family. Despite the new tow brake the tow'd was not allow to come since 4.5 inches of lift on 31"
tires did not want to align well with the stock under bumper tow setup. That is on the list to be resolved. Day one showed a bad fuel pump for the
GenSet making it a hot ride to TX. Day 2 show a fuel leak which brings up the first question. There is a canister on the front right corner of my
coach
Thanks,
--
Chris
74 Canyonland 26’
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Jerry & Sharon Work
78 Royale
Kerby, OR
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